/* ==========================================
   Imminent Web - CSS Styles
   Web-optimized design based on iOS app
   ========================================== */

/* ==================== CSS Variables ==================== */
:root {
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 40px;
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
}

/* ==================== Theme Definitions ==================== */
/* Exact RGB values from iOS SettingsView.swift */

.theme-light {
    --bg-color: rgb(242, 242, 247);
    --card-color: rgb(255, 255, 255);
    --text-color: rgb(0, 0, 0);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --border-color: rgba(0, 0, 0, 0.1);
    --skeleton-color: rgba(0, 0, 0, 0.08);
    --shimmer-color: rgba(255, 255, 255, 0.6);
}

.theme-dark {
    --bg-color: rgb(0, 0, 0);
    --card-color: rgb(28, 28, 31);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

.theme-midnight {
    --bg-color: rgb(13, 13, 38);
    --card-color: rgb(26, 26, 56);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

.theme-ocean {
    --bg-color: rgb(26, 51, 89);
    --card-color: rgb(38, 71, 115);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

.theme-forest {
    --bg-color: rgb(26, 51, 38);
    --card-color: rgb(38, 71, 51);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

.theme-sunset {
    --bg-color: rgb(89, 38, 38);
    --card-color: rgb(115, 51, 51);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

.theme-lavender {
    --bg-color: rgb(217, 209, 235);
    --card-color: rgb(235, 230, 247);
    --text-color: rgb(0, 0, 0);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --border-color: rgba(0, 0, 0, 0.1);
    --skeleton-color: rgba(0, 0, 0, 0.08);
    --shimmer-color: rgba(255, 255, 255, 0.6);
}

.theme-sand {
    --bg-color: rgb(242, 235, 217);
    --card-color: rgb(252, 247, 235);
    --text-color: rgb(0, 0, 0);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --border-color: rgba(0, 0, 0, 0.1);
    --skeleton-color: rgba(0, 0, 0, 0.08);
    --shimmer-color: rgba(255, 255, 255, 0.6);
}

.theme-charcoal {
    --bg-color: rgb(38, 38, 38);
    --card-color: rgb(56, 56, 56);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

.theme-slate {
    --bg-color: rgb(115, 128, 140);
    --card-color: rgb(140, 153, 166);
    --text-color: rgb(255, 255, 255);
    --text-secondary: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --skeleton-color: rgba(255, 255, 255, 0.1);
    --shimmer-color: rgba(255, 255, 255, 0.15);
}

/* Theme color circles for selection */
.theme-color.light { background: rgb(242, 242, 247); }
.theme-color.dark { background: rgb(0, 0, 0); }
.theme-color.midnight { background: rgb(13, 13, 38); }
.theme-color.ocean { background: rgb(26, 51, 89); }
.theme-color.forest { background: rgb(26, 51, 38); }
.theme-color.sunset { background: rgb(89, 38, 38); }
.theme-color.lavender { background: rgb(217, 209, 235); }
.theme-color.sand { background: rgb(242, 235, 217); }
.theme-color.charcoal { background: rgb(38, 38, 38); }
.theme-color.slate { background: rgb(115, 128, 140); }

/* ==================== Base Styles ==================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.4;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
    font-size: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

.hidden {
    display: none !important;
}

.spacer {
    flex: 1;
}

/* ==================== Screen System ==================== */
.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease;
    overflow: hidden;
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* Main screen needs to allow internal scrolling */
#mainScreen {
    display: flex;
    flex-direction: column;
}

.screen-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: var(--spacing-xl);
    padding-bottom: var(--spacing-2xl);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* ==================== Welcome Screen ==================== */
.welcome-content {
    align-items: center;
    text-align: center;
}

.welcome-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.app-icon {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-icon svg {
    width: 100%;
    height: 100%;
}

.app-title {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.app-subtitle {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 340px;
}

.feature-row {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    text-align: left;
}

.feature-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    background-color: var(--card-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 22px;
    height: 22px;
}

.feature-text h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
}

.feature-text p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==================== Theme Selection Screen ==================== */
.theme-content {
    align-items: center;
    text-align: center;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    align-self: flex-start;
    padding: var(--spacing-sm);
    margin-left: -8px;
    color: var(--text-color);
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.back-btn:hover {
    opacity: 0.7;
}

.back-btn svg {
    width: 20px;
    height: 20px;
}

.theme-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-icon {
    width: 70px;
    height: 70px;
}

.theme-icon svg {
    width: 100%;
    height: 100%;
}

.theme-header h2 {
    font-size: 28px;
    font-weight: 600;
}

.theme-header p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.theme-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.theme-row {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.theme-circle {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    padding: 0;
    transition: transform var(--transition-fast);
}

.theme-circle:hover {
    transform: scale(1.05);
}

.theme-circle.selected {
    transform: scale(1.1);
}

.theme-color {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 1px solid rgba(128, 128, 128, 0.3);
}

.theme-circle.selected .theme-color {
    border: 3px solid #007AFF;
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.3);
}

.check-mark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    font-weight: 700;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.theme-circle.selected .check-mark {
    opacity: 1;
}

/* Check mark color based on theme lightness */
.theme-circle[data-theme="light"] .check-mark,
.theme-circle[data-theme="lavender"] .check-mark,
.theme-circle[data-theme="sand"] .check-mark {
    color: #000;
}

.theme-circle[data-theme="dark"] .check-mark,
.theme-circle[data-theme="midnight"] .check-mark,
.theme-circle[data-theme="ocean"] .check-mark,
.theme-circle[data-theme="forest"] .check-mark,
.theme-circle[data-theme="sunset"] .check-mark,
.theme-circle[data-theme="charcoal"] .check-mark,
.theme-circle[data-theme="slate"] .check-mark {
    color: #fff;
}

.theme-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

/* ==================== Buttons ==================== */
.primary-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 340px;
    padding: 18px var(--spacing-lg);
    background-color: var(--card-color);
    color: var(--text-color);
    font-size: 17px;
    font-weight: 600;
    border-radius: 14px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.primary-btn:hover {
    opacity: 0.9;
}

.primary-btn:active {
    opacity: 0.8;
}

.primary-btn svg {
    width: 20px;
    height: 20px;
}

.accent-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 14px var(--spacing-lg);
    background-color: #007AFF;
    color: #fff;
    font-size: 17px;
    font-weight: 600;
    border-radius: 14px;
    transition: opacity var(--transition-fast);
}

.accent-btn:hover {
    opacity: 0.9;
}

.accent-btn:active {
    opacity: 0.8;
}

.accent-btn svg {
    width: 20px;
    height: 20px;
}

.text-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    color: #007AFF;
    font-size: 14px;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.text-btn:hover {
    opacity: 0.7;
}

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

.icon-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--card-color);
}

.icon-btn:active {
    opacity: 0.7;
}

.icon-btn svg {
    width: 24px;
    height: 24px;
}

/* ==================== Login Screen ==================== */
.login-content {
    align-items: center;
    text-align: center;
}

.login-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.login-header h1 {
    font-size: 36px;
    font-weight: 600;
}

.login-header p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.login-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
}

.login-hint {
    font-size: 12px;
    color: var(--text-secondary);
}

.oauth-waiting {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 340px;
    text-align: center;
}

.oauth-waiting h3 {
    font-size: 18px;
    font-weight: 600;
}

.oauth-waiting p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.oauth-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--text-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== Main Screen ==================== */
.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-color);
}

.header-title {
    font-size: 24px;
    font-weight: 600;
}

.assignments-container {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-bottom: 100px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* ==================== Loading State ==================== */
.loading-state {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skeleton-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px var(--spacing-md);
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
}

.skeleton-checkbox {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--skeleton-color);
}

.skeleton-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.skeleton-title {
    width: 180px;
    height: 18px;
    background-color: var(--skeleton-color);
    border-radius: 4px;
}

.skeleton-course {
    width: 120px;
    height: 14px;
    background-color: var(--skeleton-color);
    border-radius: 4px;
}

.skeleton-due {
    width: 70px;
    height: 14px;
    background-color: var(--skeleton-color);
    border-radius: 4px;
}

.skeleton-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        var(--shimmer-color),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ==================== Empty & All Done States ==================== */
.empty-state,
.all-done-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 400px;
    gap: var(--spacing-md);
}

.empty-state svg {
    width: 50px;
    height: 50px;
    color: var(--text-secondary);
}

.empty-state h2,
.all-done-state h2 {
    font-size: 24px;
    font-weight: 600;
}

.empty-state p,
.all-done-state p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.pulsing-check {
    position: relative;
}

.pulsing-check svg {
    width: 60px;
    height: 60px;
    color: var(--text-secondary);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

/* ==================== Assignments List ==================== */
.assignments-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--text-color);
}

.section-header.collapsible {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    width: 100%;
}

.section-header.collapsible:hover {
    opacity: 0.9;
}

.section-header .chevron {
    width: 14px;
    height: 14px;
    color: var(--text-secondary);
    transition: transform var(--transition-fast);
}

.section-header.collapsed .chevron {
    transform: rotate(-90deg);
}

.section-title {
    font-size: 17px;
    font-weight: 600;
}

.section-count {
    color: var(--text-secondary);
}

.cards-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.cards-list.collapsed {
    display: none;
}

/* Add spacing between completed header and first card */
.completed-section .cards-list {
    margin-top: var(--spacing-sm);
}

/* Completed section container styles */
.completed-section {
    margin-bottom: 0;
}

.todo-section .section-header {
    padding-left: 4px;
}

/* ==================== Assignment Card ==================== */
.card-wrapper {
    position: relative;
    border-radius: var(--border-radius);
    width: 100%;
}

.assignment-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px var(--spacing-md);
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    position: relative;
}

.assignment-card.completed {
    /* Completed cards keep full opacity - only text is styled */
}

.card-checkbox {
    flex-shrink: 0;
}

.checkbox-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    background: transparent;
}

.checkbox-btn svg {
    width: 16px;
    height: 16px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.assignment-card.completed .checkbox-btn {
    border-color: #34C759;
    background-color: #34C759;
}

.assignment-card.completed .checkbox-btn svg {
    opacity: 1;
    color: #fff;
}

.card-body {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
    word-wrap: break-word;
}

.assignment-card.completed .card-title {
    text-decoration: line-through;
    color: var(--text-secondary);
}

.card-course {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-course .archive-icon {
    color: #FF9500;
}

.card-due {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 600;
}

.card-due svg {
    width: 14px;
    height: 14px;
}

.card-due.overdue {
    color: #FF3B30;
}

.card-due.urgent {
    color: #FF3B30;
}

.card-due.soon {
    color: #FF9500;
}

.card-due.upcoming {
    color: #FFCC00;
}

.card-due.later {
    color: #34C759;
}

.card-due.distant {
    color: var(--text-secondary);
}

.card-points {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 6px 10px;
    background-color: var(--skeleton-color);
    border-radius: 20px;
    white-space: nowrap;
}

.card-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
    padding-left: 42px;
    line-height: 1.4;
}

/* Card action button (archive/delete) */
.card-action-btn {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.assignment-card:hover .card-action-btn {
    opacity: 1;
}

.archive-action-btn,
.delete-action-btn,
.unarchive-action-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.archive-action-btn {
    background-color: rgba(255, 149, 0, 0.2);
    color: #FF9500;
}

.archive-action-btn:hover {
    background-color: rgba(255, 149, 0, 0.3);
}

.unarchive-action-btn {
    background-color: rgba(52, 199, 89, 0.2);
    color: #34C759;
}

.unarchive-action-btn:hover {
    background-color: rgba(52, 199, 89, 0.3);
}

.delete-action-btn {
    background-color: rgba(255, 59, 48, 0.2);
    color: #FF3B30;
}

.delete-action-btn:hover {
    background-color: rgba(255, 59, 48, 0.3);
}

.archive-action-btn svg,
.delete-action-btn svg,
.unarchive-action-btn svg {
    width: 18px;
    height: 18px;
}

/* Archive icon in course name */
.card-course .archive-icon {
    width: 14px;
    height: 14px;
    color: #FF9500;
    flex-shrink: 0;
}

/* Custom assignments have a different icon color (blue) */
.card-course .archive-icon.custom {
    color: #007AFF;
}

/* Touch devices - always show buttons */
@media (hover: none) {
    .card-action-btn {
        opacity: 1;
    }
}

/* Swipe actions */
.card-actions {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    transform: translateX(100%);
    transition: transform var(--transition-fast);
}

.delete-btn,
.archive-btn {
    width: 70px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.delete-btn {
    background-color: #FF3B30;
}

.archive-btn {
    background-color: #FF9500;
}

.delete-btn svg,
.archive-btn svg {
    width: 24px;
    height: 24px;
}

/* ==================== Modals ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease;
}

.modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    background-color: var(--bg-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 17px;
    font-weight: 600;
}

.modal-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--card-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.modal-btn:hover {
    opacity: 0.8;
}

.modal-btn.primary {
    font-weight: 600;
}

.modal-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.modal-btn svg {
    width: 16px;
    height: 16px;
}

.modal-btn-placeholder {
    width: 70px;
}

/* ==================== Add Form ==================== */
.add-form {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--card-color);
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius);
    outline: none;
    transition: box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    box-shadow: 0 0 0 2px #007AFF;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-secondary);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-size: 17px;
    font-weight: 600;
}

.datetime-input {
    color-scheme: dark light;
}

/* ==================== Settings Modal ==================== */
.settings-modal {
    max-height: 85vh;
}

.settings-content {
    padding: var(--spacing-md);
    overflow-y: auto;
    max-height: calc(85vh - 60px);
}

.settings-section {
    margin-bottom: var(--spacing-lg);
}

.settings-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-sm);
}

.settings-theme-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--card-color);
    border-radius: var(--border-radius);
}

.settings-theme-grid .theme-circle {
    width: 44px;
    height: 44px;
    margin: 0 auto;
}

.settings-row {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 14px var(--spacing-md);
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    text-align: left;
    margin-bottom: var(--spacing-sm);
    transition: opacity var(--transition-fast);
}

.settings-row:hover {
    opacity: 0.9;
}

.settings-row svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.settings-row span {
    flex: 1;
}

.settings-row .chevron-right {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.settings-row.danger {
    color: #FF3B30;
}

/* Additional Settings */
.settings-info-group {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.settings-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px var(--spacing-md);
}

.settings-info-row:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.info-label {
    font-weight: 500;
}

.info-value {
    color: var(--text-secondary);
}

.settings-toggle-group {
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.settings-toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px var(--spacing-md);
    cursor: pointer;
    position: relative;
}

.settings-toggle-row:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.toggle-info {
    flex: 1;
}

.toggle-label {
    display: block;
    font-weight: 500;
}

.toggle-description {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.toggle-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    width: 51px;
    height: 31px;
    background-color: var(--skeleton-color);
    border-radius: 31px;
    position: relative;
    transition: background-color var(--transition-fast);
    flex-shrink: 0;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 27px;
    height: 27px;
    background-color: #fff;
    border-radius: 50%;
    transition: transform var(--transition-fast);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-input:checked + .toggle-slider {
    background-color: #34C759;
}

.toggle-input:checked + .toggle-slider::after {
    transform: translateX(20px);
}

/* ==================== Responsive ==================== */
@media (min-width: 768px) {
    .modal-content {
        max-width: 500px;
        margin: auto;
        border-radius: 20px;
    }
    
    .screen-content {
        max-width: 600px;
        margin: 0 auto;
    }
}

/* ==================== Safe Area ==================== */
@supports (padding: env(safe-area-inset-bottom)) {
    .screen-content {
        padding-bottom: calc(var(--spacing-2xl) + env(safe-area-inset-bottom));
    }
    
    .assignments-container {
        padding-bottom: calc(100px + env(safe-area-inset-bottom));
    }
    
    .modal-content {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* ==================== Touch Optimizations ==================== */
@media (hover: none) {
    .primary-btn:hover,
    .accent-btn:hover,
    .icon-btn:hover,
    .settings-row:hover,
    .back-btn:hover {
        opacity: 1;
        background-color: inherit;
    }
}

/* ==================== Print ==================== */
@media print {
    .screen:not(.active),
    .modal,
    .main-header button {
        display: none !important;
    }
}