/* CSS Reset ve Temel Stiller */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* =================================== */
/*       Yardımcı Sınıflar (Utility)   */
/* =================================== */
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-col-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
}

/* =================================== */
/*       Genel Layout Stilleri         */
/* =================================== */

.app-container {
    min-height: 100vh;
    margin: 0 auto;
}

/* Sayfa Geçişleri */
.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.hidden {
    display: none !important;
}

/* Yükleme Ekranı */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Giriş/Kayıt Sayfası */
#auth-page {
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.auth-container {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-large);
    width: 100%;
    max-width: 450px;
    border: 1px solid var(--border-color);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.auth-tabs {
    display: flex;
    margin-bottom: 25px;
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 4px;
}

.auth-tab {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.auth-tab.active {
    background: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-small);
}

/* Form Stilleri */
.auth-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    border-radius: 8px;
    color: var(--text-primary);
}

.form-group input[readonly] {
    background-color: var(--bg-tertiary);
    cursor: not-allowed;
}

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-color-alpha);
}

.error-message {
    color: var(--danger-color);
    background-color: var(--danger-bg);
    border: 1px solid var(--danger-color);
    border-radius: 8px;
    padding: 10px 15px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    font-weight: 500;
    display: none; /* Varsayılan olarak gizli */
}

.auth-btn {
    width: 100%;
    padding: 15px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

.auth-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.link-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: underline;
    transition: color 0.3s ease;
}

.link-btn:hover {
    color: var(--accent-hover);
}

.auth-divider {
    text-align: center;
    margin: 25px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.auth-divider span {
    background: var(--card-bg);
    padding: 0 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.google-btn {
    width: 100%;
    padding: 15px;
    background: white;
    color: #333;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.google-btn:hover {
    background: #f8f9fa;
    box-shadow: var(--shadow-medium);
}

.guest-btn {
    width: 100%;
    padding: 12px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.guest-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Ana Sayfa */
#main-page {
    background: var(--bg-primary);
}

/* =================================== */
/*       Yeni Üst Bar Stilleri         */
/* =================================== */

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    margin: 1rem;
    border-radius: 1.5rem; /* Daha yuvarlak kenarlar */
    box-shadow: var(--shadow-large);
    position: sticky;
    top: 1rem;
    z-index: 1000;
}

#welcome-message {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Geri Sayım Sayacı */
#countdown-timer {
    display: flex;
    gap: 1rem;
    background-color: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: 1rem;
}

.countdown-item {
    text-align: center;
}

.countdown-item span {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-color);
}

.countdown-item label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Çalışma Serisi Widget'ı */
#streak-counter-widget {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #FF6B6B, #FF8E53); /* Canlı turuncu-kırmızı gradient */
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: 1rem;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.streak-widget-title {
    font-size: 0.8rem;
    font-weight: 500;
    opacity: 0.9;
}

.streak-display {
    font-size: 1.75rem;
    font-weight: 700;
}

/* Kullanıcı Aksiyon Butonları */
.user-actions {
    display: flex;
    background-color: var(--bg-tertiary);
    padding: 0.5rem;
    border-radius: 1rem;
    gap: 0.5rem;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 0.75rem;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover, .icon-btn.active {
    background: var(--accent-color);
    color: white;
    transform: scale(1.1);
}

/* İkonları eklemek için (FontAwesome veya SVG kullanabilirsiniz) */
#theme-toggle::before { content: '🌓'; }
#settings-btn::before { content: '⚙️'; }
#achievements-btn::before { content: '🏆'; }
#history-btn::before { content: '📜'; }
#logout-btn::before { content: '🚪'; }


/* Eski Üst Bar Stillerini Temizleme veya Yorum Satırı Yapma */
/*
.top-bar .user-info, 
#history-page-body .user-info,
.top-bar h2 {
    ... eski stiller ...
}
*/

/* Ana İçerik */
.container { /* .main-content yerine .container kullanalım */
    flex: 1;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

#main-content {
    display: grid;
    gap: 1.5rem;
}

/* Card Stili (Yeni Ortak Sınıf) */
.card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px; /* Padding'i standart hale getiriyoruz */
    box-shadow: var(--shadow-large);
    border: 1px solid var(--border-color);
    transition: background-color 0.3s ease; /* Renk geçişi için */
}

.main-content > .card:nth-child(even) {
    background: var(--card-bg-alt);
}

/* Zamanlayıcı Bölümü */
.timer-section {
    margin-bottom: 0; /* Artık gap tarafından yönetiliyor */
    padding: 1.5rem;
}

.timer-container {
    padding: 0;
    box-shadow: none;
}

.timer-display {
    font-size: 4rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.timer-controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.control-btn {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 130px;
}

.add-btn {
    min-width: 50px;
    max-width: 50px;
    padding: 10px;
    font-size: 1.5rem;
    background-color: var(--accent-color);
    color: white;
    border-radius: 50%;
}

.start-btn {
    background: var(--success-color);
    color: white;
}

.start-btn:hover {
    background: var(--success-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.pause-btn {
    background: var(--warning-color);
    color: white;
}

.pause-btn:hover {
    background: var(--warning-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.reset-btn {
    background: var(--danger-color);
    color: white;
}

.reset-btn:hover {
    background: var(--danger-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.subject-selection {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

#subject-select {
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    min-width: 200px;
    cursor: pointer;
}

#subject-select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.save-btn {
    padding: 12px 25px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.save-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.save-btn:disabled {
    background: var(--text-disabled);
    cursor: not-allowed;
    opacity: 0.5;
}

/* ====================================================== */
/*    DASHBOARD, SUMMARY, GOAL İÇİN TÜM ESKİ KODLAR     */
/*          BU NOKTADAN SONRA SİLİNİYOR                  */
/* ====================================================== */


/* ====================================================== */
/*      YENİ, TEMİZ VE DOĞRU DASHBOARD STİLLERİ           */
/* ====================================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px; /* İçerik sütunları arasındaki boşluk */
    align-items: start; /* Her iki sütunun da üstten hizalanmasını sağlar */
}

.summary-container,
.goal-container {
    display: flex;
    flex-direction: column;
    gap: 20px; /* Başlık ve içerik arasındaki dikey boşluk */
}

.goal-container {
    align-items: center; /* Hedef içeriğini (progress bar) yatayda ortalar */
}

.dashboard-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    width: 100%;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.summary-card {
    background-color: var(--bg-secondary);
    padding: 20px;
    border-radius: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 10px;
    min-height: 100px;
}

.summary-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.summary-card h4 {
    font-size: 1rem;
    margin: 0;
    color: var(--text-secondary);
}

.total-time-card p {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.subject-breakdown-card ul {
    list-style: none;
    padding: 0;
    width: 100%;
    text-align: left;
}

.subject-breakdown-card li {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.subject-breakdown-card li:last-child {
    border-bottom: none;
}

/* ====================================================== */
/*              YENİ STİLLERİN SONU                       */
/* ====================================================== */


.motivation-quote {
    display: flex;
    align-items: center;
    justify-content: center;
    /* .card'dan stilleri alacak */
}

.motivation-quote p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-primary);
    text-align: center;
    line-height: 1.7;
}

.countdown-container {
    margin-top: 0; /* Grid gap'i kullanıyoruz */
    padding: 20px;
    background-color: transparent; /* .card'dan gelecek */
    border-radius: 0;
    text-align: center;
}

.countdown-container h4 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-secondary);
}

#countdown-timer {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
}

.countdown-item span {
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-color);
}

.countdown-item label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Modal Stilleri */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transform: scale(1);
    transition: transform 0.3s ease;
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.95);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.modal-header p {
    margin-bottom: 0.75rem;
}

#edit-date-picker {
    margin-bottom: 1.5rem;
    width: 100%;
}

#sessions-for-date-container {
    max-height: 40vh;
    overflow-y: auto;
    padding-right: 10px; /* Kaydırma çubuğu için */
}

.session-edit-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    background-color: var(--bg-secondary);
}

.session-edit-item:last-child {
    margin-bottom: 0;
}

.session-info {
    display: flex;
    flex-direction: column;
    flex-grow: 1; /* Esnek büyüme */
}

.session-info .subject {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.session-info .start-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.session-duration-editor {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-duration-editor label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.duration-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.duration-input-wrapper input {
    width: 70px; /* Genişliği ayarla */
    text-align: center;
}

.session-edit-actions {
    display: flex;
    gap: 0.5rem;
}

.session-edit-actions button {
    background: none;
    border: none;
    cursor: pointer;
    margin-left: 0.75rem;
}

.session-edit-actions svg {
    width: 20px;
    height: 20px;
    transition: transform 0.2s;
}
.session-edit-actions button:hover svg {
    transform: scale(1.1);
}

.btn-delete svg {
    fill: #E94F37;
}

.btn-save svg {
    fill: #50E3C2;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

/* --- FORM GİRİŞ STİLLERİ --- */
.form-input {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

/* Webkit tabanlı tarayıcılar için tarih seçici ikonu */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
    cursor: pointer;
    transition: filter 0.2s;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
    filter: invert(1);
}

.modal-body {
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.secondary-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.tertiary-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    margin-top: 15px;
}

/* Modal Divider Stili */
.modal-divider {
    padding-top: 20px;
    margin: 20px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-weight: 500;
    color: var(--text-secondary);
}

.full-width-btn {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    margin-bottom: 15px;
}

.secondary-btn {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.secondary-btn:hover {
    background-color: var(--bg-tertiary);
}

.exam-date-form {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Ayarlar Modalı Stilleri */
.large-modal {
    max-width: 800px;
}

.settings-container {
    display: flex;
    gap: 1.5rem;
    width: 100%;
    flex-grow: 1; /* Eklendi: Ana içeriğin büyümesini sağlar */
}

.settings-sidebar {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 150px;
    border-right: 1px solid var(--border-color);
    padding-right: 20px;
    flex-shrink: 0;
}

.settings-tab {
    padding: 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all 0.3s ease;
}

.settings-tab.active, .settings-tab:hover {
    background: var(--accent-color);
    color: white;
}

.settings-content {
    flex-grow: 1;
    width: 100%;
    display: flex; /* Eklendi */
    flex-direction: column; /* Eklendi */
}

.settings-content .tab-content-container {
    flex-grow: 1;
    display: flex; /* Eklendi */
    flex-direction: column; /* Eklendi */
}

.tab-content {
    display: none;
    flex-direction: column; /* Eklendi */
    flex-grow: 1; /* Eklendi */
    animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
    display: flex; /* 'block' yerine 'flex' yapıldı */
}

.settings-panel {
    display: none;
}

.settings-panel.active {
    display: block;
}

.settings-panel h3 {
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.add-subject-form {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

#new-subject-input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-primary);
}

.theme-options {
    margin-top: 20px;
}

/* Profil Modalı Stilleri */
.modal-content .auth-divider {
    margin: 25px 0 15px 0;
}

.profile-details .form-group, .modal-content .form-group {
    margin-bottom: 20px;
}

.profile-details label, .modal-content label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

#profile-email[disabled] {
    background: var(--bg-secondary);
    cursor: not-allowed;
}

.profile-actions {
    margin-top: 20px;
}

/* Bildirim (Toast) Stilleri */
.notification-container {
    position: fixed;
    bottom: -100px; /* Başlangıçta gizli */
    right: 20px;
    padding: 15px 25px;
    border-radius: 10px;
    background-color: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-large);
    z-index: 2000;
    transition: bottom 0.5s ease-in-out;
    opacity: 0;
}

.notification-container.show {
    bottom: 20px;
    opacity: 1;
}

/* Farklı bildirim türleri için renkler */
.notification-container.success {
    background-color: var(--success-color);
}

.notification-container.error {
    background-color: var(--danger-color);
}

.notification-container.info {
    background-color: var(--accent-color);
}

#close-settings-modal-btn {
    display: flex;
    justify-content: flex-end;
    margin-top: 20px;
}

#close-settings-modal-btn.tertiary-btn {
    width: auto;
    padding: 10px 20px;
}


/* Responsive Tasarım */
@media (max-width: 768px) {
    .timer-display {
        font-size: 2.5rem;
    }
    
    .timer-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .control-btn {
        width: 100%;
        max-width: 200px;
    }
    
    .subject-selection {
        flex-direction: column;
    }
    
    #subject-select {
        width: 100%;
    }
    
    .motivation-section {
        grid-template-columns: 1fr;
    }
    
    .user-info {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .main-content {
        padding: 20px 15px;
    }
    
    .timer-container,
    .goal-container,
    .summary-container,
    .motivation-quote,
    .countdown-container {
        padding: 20px;
    }
    
    #countdown-timer {
        flex-wrap: wrap;
        gap: 10px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr; /* Mobilde sütunları alt alta getir */
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: 30px 20px;
    }
    
    .timer-display {
        font-size: 2rem;
    }
    
    .auth-header h1 {
        font-size: 1.8rem;
    }
    
    .countdown-item {
        padding: 10px;
        min-width: 60px;
    }
    
    .countdown-item span {
        font-size: 1.2rem;
    }
} 

.progress-circle-container {
    position: relative;
    width: 160px;
    height: 160px;
    margin-top: 15px;
}

.progress-ring {
    transform: rotate(-90deg); /* Başlangıç noktasını üste alır */
}

.progress-ring-track {
    stroke: var(--border-color);
}

.progress-ring-fill {
    stroke: var(--accent-color);
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease-out;
}

#progress-text-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
}

#progress-percentage {
    font-size: 2rem;
    font-weight: 700;
}

#progress-hours {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Bu kural artık .timer-section tarafından yönetiliyor, kaldırılabilir veya düzenlenebilir */
.countdown-container {
    margin-top: 0; /* Grid gap'i kullanıyoruz */
    padding: 20px;
    background-color: transparent; /* .card'dan gelecek */
    border-radius: 0;
    text-align: center;
}

/* Üst Bardaki Geri Sayım Sayacı İçin Özel Stiller */
.top-bar-countdown {
    margin: 0;
    padding: 0;
    background-color: transparent;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.top-bar-countdown h4 {
    margin: 0 0 4px 0;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

#countdown-timer {
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

.top-bar-countdown .countdown-item span {
    font-size: 1.8rem;
    font-weight: 600;
}

.top-bar-countdown .countdown-item label {
    font-size: 0.7rem;
}


.countdown-container h4 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-secondary);
}

#countdown-timer {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
}

.countdown-item span {
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-color);
}

.countdown-item label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* =================================== */
/*       History Sayfası Stilleri      */
/* =================================== */

.main-content {
    padding: 2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* History Page Specific Styles */
#history-page-title {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.stat-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
}

.stat-card p {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-color);
}

.history-layout-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: stretch; /* Sütunların aynı yüksekliğe esnemesini sağlar */
}

/* ------------- Çalışma Geçmişi Düzeni ------------- */
.history-layout-grid {
    align-items: flex-start; /* Kartların üstten hizalanması */
}

/* Kartların aşırı büyümesini engelle, yüksekliği sabitle */
.charts-section,
.history-details-section {
    max-height: 500px; /* İstenilen sabit oran */
}

/* Detay kartı içeriği dikey scroll */
.history-details-section {
    overflow: hidden; /* Dışta scroll olmasın */
}

.history-details-section #history-content {
    flex: 1;
    overflow-y: auto;
}

/* Küçük ekranlarda yüksekliği artırmak gerekebilir */
@media (max-width: 768px) {
    .charts-section,
    .history-details-section {
        max-height: none; /* Mobilde sınırsız, zaten tek kolon */
    }
}

.charts-section {
    display: flex;
    flex-direction: column; /* İçeriğin dikey olarak esnemesi için */
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
}

.activity-chart-section {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
}

.activity-chart-section .chart-container {
    height: 350px; /* Büyük grafiğin yüksekliği */
}

.chart-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1; /* Mevcut dikey boşluğu doldurması için */
}

.chart-container {
    position: relative;
    width: 100%;
    flex-grow: 1;
    min-height: 0;
}

.chart-title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    flex-shrink: 0; /* Başlığın küçülmesini engeller */
}

.history-details-section {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.history-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: none;
}

.history-tab {
    background-color: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    font-weight: 500;
}

.history-tab:hover {
    background-color: var(--hover-bg);
}

.history-tab.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

#history-content {
    margin-top: 1.5rem;
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
    min-height: 0;
}

#history-content::-webkit-scrollbar {
  width: 8px;
}

#history-content::-webkit-scrollbar-track {
  background: var(--bg-color);
  border-radius: 10px;
}

#history-content::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}

#history-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

.day-group {
    margin-bottom: 1.5rem;
}

.day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 1rem;
    font-weight: 600;
}

.day-total-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.day-sessions-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.day-sessions-list li {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: 0.9rem 0.25rem;
    font-size: 1.05rem; 
}

/* Sadece günlük görünümdeki gün gruplarının içindeki listelere alt çizgi ekle */
.day-group .day-sessions-list li {
     border-bottom: 1px solid var(--border-color-light);
}

.day-group .day-sessions-list li:last-child {
    border-bottom: none;
}

/* Ders adı ve süre/seans bilgisini içeren ana satır */
.summary-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Süre ve seans sayısını bir arada tutan kap */
.duration-container {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

/* Seans sayısı metni */
.session-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* İlerleme çubuğu */
.progress-bar-container {
    width: 100%;
    height: 6px;
    background-color: var(--border-color-light);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 3px;
    transition: width 0.5s ease-in-out;
}

/* Tüm listelerdeki ders adlarının fontu */
.history-subject-name {
    color: var(--text-primary);
    font-weight: 600;
}

.history-duration {
    color: var(--text-secondary);
    font-weight: 500;
}


/* --- MEDYA SORGULARI --- */
@media (max-width: 1024px) {
    .history-layout-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }

    .stats-section {
        grid-template-columns: 1fr 1fr;
    }

    .stat-card p {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .stats-section {
        grid-template-columns: 1fr;
    }

    .history-tabs {
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .history-tab {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
} 

.progress-circle-container {
    position: relative;
    width: 160px;
    height: 160px;
    margin-top: 15px;
}

.progress-ring {
    transform: rotate(-90deg); /* Başlangıç noktasını üste alır */
}

.progress-ring-track {
    stroke: var(--border-color);
}

.progress-ring-fill {
    stroke: var(--accent-color);
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease-out;
}

#progress-text-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
}

#progress-percentage {
    font-size: 2rem;
    font-weight: 700;
}

#progress-hours {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Bu kural artık .timer-section tarafından yönetiliyor, kaldırılabilir veya düzenlenebilir */
.countdown-container {
    margin-top: 0; /* Grid gap'i kullanıyoruz */
    padding: 20px;
    background-color: transparent; /* .card'dan gelecek */
    border-radius: 0;
    text-align: center;
}

/* Üst Bardaki Geri Sayım Sayacı İçin Özel Stiller */
.top-bar-countdown {
    margin: 0;
    padding: 0;
    background-color: transparent;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.top-bar-countdown h4 {
    margin: 0 0 4px 0;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

#countdown-timer {
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

.top-bar-countdown .countdown-item span {
    font-size: 1.8rem;
    font-weight: 600;
}

.top-bar-countdown .countdown-item label {
    font-size: 0.7rem;
}


.countdown-container h4 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-secondary);
}

#countdown-timer {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
}

.countdown-item span {
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-color);
}

.countdown-item label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Ana İçerik Düzeni */
.bottom-grid {
    display: grid;
    grid-template-columns: 1fr 0.8fr; /* MASAÜSTÜ: 2 SÜTUN */
    gap: 2rem;
    align-items: stretch; /* 'start' yerine 'stretch' - Sütunların aynı yüksekliğe esnemesini sağlar */
}

.summary-container,
.slideshow-container {
    height: 100%;
}

/* Yeni Yatay Hedef İlerleme Çubuğu */
.daily-goal-bar-container {
    margin-top: 1.5rem;
}

.goal-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-bar-background {
    width: 100%;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-fill {
    width: 0%; /* JS ile güncellenecek */
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 5px;
    transition: width 0.5s ease-out;
}

/* Eski Grid ve Dairesel Grafik Kodlarını Kaldırma */
.grid-container, 
.dashboard-grid,
.goal-section,
.progress-circle-container {
    display: none; /* Bu elementleri tamamen gizle */
}

/* Fotoğraf Galerisi (Slayt Gösterisi) */
.slideshow-container {
    background: white;
    padding: 1rem 1rem 4.5rem 1rem; /* Polaroid efekti için alt boşluk artırıldı */
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-large);
    transform: rotate(2deg); /* Hafif eğim efekti */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: flex-start; /* 'center' yerine 'flex-start' - Resmin üste yaslanmasını sağlar */
    overflow: hidden;
    position: relative;
    /* max-height buradan kaldırıldı */
}

.slideshow-container:hover {
    transform: rotate(0deg) scale(1.02); /* Üzerine gelince düzleşsin ve büyüsün */
    box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}

#slideshow-image {
    max-width: 100%;
    max-height: 100%;
    height: auto;
    width: 100%;
    object-fit: cover; /* Görüntüyü kırparak sığdır */
    border-radius: var(--border-radius-small);
    border: 1px solid #ddd;
    opacity: 1; /* Başlangıç opaklığı */
    transition: opacity 1s ease-in-out; /* Opaklık geçişi eklendi */
}

/* Ana İçerik Düzeni ve Boşluklar */
.timer-section,
.bottom-grid,
.motivation-quote {
    margin-bottom: 2rem;
}

/* Medya Sorguları (Responsive Tasarım) */
@media (max-width: 768px) {
    
    /* Ana Izgara Yapısı */
    .bottom-grid {
        grid-template-columns: 1fr; /* MOBİL: 1 SÜTUN */
    }

    .slideshow-container {
        max-height: 400px; /* Sadece mobil için yükseklik limiti */
        transform: rotate(0deg); 
    }
    
    /* #slideshow-image'e özel yükseklik limiti de kaldırıldı, artık gereksiz */

    /* Ayarlar Modalı */
    .settings-container {
        flex-direction: column; /* Dikey sıralama */
        gap: 1rem;
    }

    .settings-sidebar {
        flex-direction: row; /* Yatay sıralama (Sekme gibi) */
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 0;
        width: 100%;
        overflow-x: auto; /* Yatayda kaydırma */
    }

    .settings-sidebar .settings-tab {
        flex-shrink: 0; /* Butonların sıkışmasını engelle */
        border-radius: var(--border-radius-large) var(--border-radius-large) 0 0;
        border-right: 1px solid var(--border-color);
    }

    .settings-sidebar .settings-tab:last-child {
        border-right: none;
    }

    .large-modal .modal-content {
        padding: 1rem;
    }

    /* Üst Bar */
    .user-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    /* Zamanlayıcı Kontrolleri */
    .timer-controls {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .timer-controls .subject-select {
        grid-column: 1 / -1; /* Dropdown'u tam genişlik yap */
    }

    .timer-controls .control-btn {
        padding: 0.8rem 1rem; /* Butonları biraz küçült */
        font-size: 0.95rem;
        min-width: 0; /* Eski kuralı geçersiz kıl */
        flex-grow: 0; /* Eski kuralı geçersiz kıl */
    }

    /* Geçmiş Sayfası */
    #history-page.main-content {
        padding: 1rem;
    }

    .history-layout-grid {
        grid-template-columns: 1fr; /* Tek sütuna düşür */
    }

    .charts-section {
        min-height: 300px;
    }
}

/* Kalp Animasyonu */
@keyframes heart-fly {
    0% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-550px) scale(0);
        opacity: 0;
    }
}

.heart-particle {
    position: absolute;
    bottom: 0; /* Alttan başlasınlar */
    pointer-events: none; /* Tıklama olaylarını engelle */
    animation-name: heart-fly;
    animation-timing-function: linear;
    animation-fill-mode: forwards;
    text-shadow: 0 0 5px rgba(255, 105, 180, 0.7);
    z-index: 1; /* Parçacıkları arka plana al */
}

.love-text {
    position: absolute;
    bottom: 1.5rem; /* Konum ayarlandı */
    left: 50%;
    transform: translateX(-50%);
    color: #c44569;
    font-family: 'Inter', sans-serif;
    font-weight: bold;
    font-size: 0.7rem; /* Boyut küçültüldü */
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    pointer-events: none;
    text-align: center; /* Ortalandı */
    line-height: 1.4; /* Satır yüksekliği ayarlandı */
    z-index: 2; /* Yazıyı ön plana al */
}

.love-text.visible {
    opacity: 1;
}

/* Ayarlar Modalı: Ders Yönetimi */
.subject-management-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem 0;
    max-height: 250px; /* Biraz daha yükseklik verildi */
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-large);
}

.subject-management-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.subject-management-list li:last-child {
    border-bottom: none;
}

.subject-management-list li:hover {
    background-color: var(--bg-secondary);
}

.subject-management-list .subject-name {
    font-weight: 500;
}

.subject-management-list .delete-subject-btn {
    background: transparent;
    border: none;
    color: var(--danger-color);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.subject-management-list .delete-subject-btn:hover {
    opacity: 1;
}

.subject-management-list .empty-message {
    padding: 1rem;
    text-align: center;
    color: var(--text-secondary);
}

.add-subject-form {
    display: flex;
    gap: 0.5rem;
}

.add-subject-form input {
    flex-grow: 1;
}

.add-subject-form .close-btn {
    white-space: nowrap;
} 

/* History Sayfası: Günlük Gezinme Butonları */
.daily-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-large);
}

.daily-nav h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.daily-nav .icon-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background-color: transparent;
} 

/* Kayıt Düzenleme Modalı: Tarih Seçici */
.date-selector-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background-color: var(--bg-secondary); /* Renk açıldı */
    border: 1px solid var(--border-color); /* Kenarlık eklendi */
    border-radius: var(--border-radius-large); /* Yuvarlak köşe eklendi */
    padding: 0.25rem 0.5rem; /* İç boşluk azaltıldı */
}

.date-selector-wrapper .form-input {
    flex-grow: 1;
    order: 2;
    background-color: transparent; /* Arka plan kaldırıldı */
    border: none; /* Kenarlık kaldırıldı */
    text-align: center; /* Metni ortala */
}

.date-selector-wrapper #modal-prev-day-btn {
    order: 1;
}

.date-selector-wrapper #modal-next-day-btn {
    order: 3;
}

.date-selector-wrapper .icon-btn {
    flex-shrink: 0;
    background-color: transparent; /* Arka plan kaldırıldı */
} 

/* ==========================================================================
   Oyunlaştırma (Gamification) Stilleri
   ========================================================================== */

/* Seri (Streak) Widget stilleri artık top-bar içinde tanımlandı, bu bölüm kaldırılabilir veya düzenlenebilir. */

/* Başarım Modalı */
#achievements-list-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    max-height: 60vh;
    overflow-y: auto;
    padding: 0.5rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 8px;
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.achievement-item.locked {
    opacity: 0.5;
    filter: grayscale(80%);
}

.achievement-item.unlocked {
    border-color: var(--primary-color-light);
    box-shadow: 0 0 15px rgba(var(--primary-color-rgb), 0.1);
}

.achievement-icon {
    font-size: 2.5rem;
}

.achievement-details {
    text-align: left;
}

.achievement-name {
    margin: 0 0 0.25rem 0;
    color: var(--text-primary);
}

.achievement-description {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}


/* Başarım Bildirimi (Toast) */
.toast-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(150%);
    background-color: var(--background-elevated);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 1001;
    transition: transform 0.4s ease-in-out;
    border-left: 5px solid var(--primary-color);
}

.toast-notification.show {
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    font-size: 1.8rem;
}

.toast-content .toast-title {
    margin: 0;
    font-weight: 600;
}

.toast-content .toast-message {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* =============================== */
/*  Mobil (<=768px) Üst Bar Fixi   */
/* =============================== */
@media (max-width: 768px) {
    .top-bar {
        flex-direction: column;
        align-items: flex-start; /* Sol hizalı; istenirse center yapılabilir */
        gap: 1rem;
        padding: 1rem;
    }

    .top-bar-right {
        flex-wrap: wrap;
        justify-content: flex-start;
        width: 100%;
        gap: 1rem;
    }

    #countdown-timer {
        gap: 0.5rem;
        padding: 0.5rem 0.75rem;
    }

    .user-actions {
        flex-wrap: wrap;
        justify-content: flex-start;
        gap: 0.5rem;
    }

    /* İkon boyutlarını küçült */
    .icon-btn {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }
}

/* =============================== */
/*  Daha Küçük Ekran (<=480px)     */
/* =============================== */
@media (max-width: 480px) {
    #welcome-message {
        font-size: 1.25rem;
        line-height: 1.3;
    }

    #countdown-timer .countdown-item span {
        font-size: 1.25rem;
    }

    #streak-counter-widget {
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
    }

    .streak-display {
        font-size: 1.5rem;
    }
} 

.progress-circle-container {
    position: relative;
    width: 160px;
    height: 160px;
    margin-top: 15px;
}

.progress-ring {
    transform: rotate(-90deg); /* Başlangıç noktasını üste alır */
}

.progress-ring-track {
    stroke: var(--border-color);
}

.progress-ring-fill {
    stroke: var(--accent-color);
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease-out;
}

#progress-text-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
}

#progress-percentage {
    font-size: 2rem;
    font-weight: 700;
}

#progress-hours {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Bu kural artık .timer-section tarafından yönetiliyor, kaldırılabilir veya düzenlenebilir */
.countdown-container {
    margin-top: 0; /* Grid gap'i kullanıyoruz */
    padding: 20px;
    background-color: transparent; /* .card'dan gelecek */
    border-radius: 0;
    text-align: center;
}

/* Üst Bardaki Geri Sayım Sayacı İçin Özel Stiller */
.top-bar-countdown {
    margin: 0;
    padding: 0;
    background-color: transparent;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.top-bar-countdown h4 {
    margin: 0 0 4px 0;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

#countdown-timer {
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

.top-bar-countdown .countdown-item span {
    font-size: 1.8rem;
    font-weight: 600;
}

.top-bar-countdown .countdown-item label {
    font-size: 0.7rem;
}


.countdown-container h4 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-secondary);
}

#countdown-timer {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.countdown-item {
    display: flex;
    flex-direction: column;
}

.countdown-item span {
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-color);
}

.countdown-item label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ---------- Çalışma Geçmişi Üst Panel Elemanları ---------- */
.top-bar .back-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.25s ease;
}

.top-bar .back-btn:hover {
    background-color: var(--accent-color);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

/* Edit (Kalem) Butonu */
#edit-records-btn {
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 0.75rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s ease;
}

#edit-records-btn svg {
    fill: var(--text-secondary);
    transition: all 0.25s ease;
}

#edit-records-btn:hover {
    background-color: var(--accent-color);
    transform: scale(1.1);
}

#edit-records-btn:hover svg {
    fill: #fff;
} 

/* ---------- Tema Tabanlı Arka Plan Düzeltmeleri ---------- */
.light-theme .app-container,
.light-theme .page {
    background-color: var(--bg-primary) !important;
}

/* Canvas içi arka planı kaldır (grafikler kart rengiyle uyumlu görünsün) */
.light-theme canvas {
    background-color: transparent !important;
} 

/* ---------- Donut Grafik Kartı Boyut Ayarı ---------- */
.charts-section {
    display: flex;
    flex-direction: column;
}

.charts-section .chart-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Grafik container tam yüksekliği alsın */
.charts-section .chart-container {
    flex: 1;
    width: 100%;
    height: 100%;
}

/* Canvas boyutu: kapsayıcıya göre ölçeklensin ama genişliği otomatik bırak */
.charts-section canvas {
    max-height: 90%;
    max-width: 90%;
    /* width/height auto kısıtlamaları kaldırıldı */
} 

/* ==================================================== */
/*   Donut Grafiği: Sağdaki kutu ile aynı yükseklikte    */
/*   -------------------------------------------------- */
/*   Önceki sabit yükseklik ve max-height sınırlamaları  */
/*   bu kuralla geçersiz kılınır. Grid içerisindeki     */
/*   öğeler zaten varsayılan olarak stretch olur, bu     */
/*   nedenle yüksekliği satırın (sağdaki kutu) yüksekliği*/
/*   kadar olacaktır.                                   */
/* ==================================================== */
.history-layout-grid .charts-section {
    height: 100% !important;      /* Satır yüksekliğini tamamen kapla */
    max-height: 500px !important; /* Maksimum 500px olacak */
}

/* Detay kutusunun da üst sınırı kaldırılıyor ki birlikte
   esneyebilsinler. */
.history-layout-grid .history-details-section {
    max-height: 500px !important; /* Maksimum 500px olacak */
}