/* Google Classroom Theme Colors */
:root {
    --classroom-green: var(--primary-maroon, #800000);
    /* Main Google Classroom Green mapped to b1t-Sched Maroon */
    --classroom-green-hover: var(--secondary-maroon, #660000);
    --classroom-bg: var(--bg-white, #ffffff);
    --classroom-text: var(--text-dark, #333333);
    --classroom-text-secondary: var(--text-medium, #666666);
    --classroom-border: var(--border-light, #e0e0e0);
    --classroom-bg-secondary: var(--bg-lighter, #f8f8f8);
}

/* Override Google Classroom Colors for Dark Mode */
body.dark-mode {
    --classroom-green: #d4dd93;
    --classroom-green-hover: #b8c466;
    --classroom-bg: #1a1c0d;
    --classroom-text: #f0f1ea;
    --classroom-text-secondary: #d4dd93;
    --classroom-border: #7e8b1b;
    --classroom-bg-secondary: #101206;
}

/* Override Google Classroom Colors for Gray Mode */
body.gray-mode {
    --classroom-green: #ff6360;
    /* Mapping from --primary-maroon */
    --classroom-green-hover: #e05552;
    /* Slightly darker */
    --classroom-bg: #1a1a1a;
    /* Mapping from --bg-white */
    --classroom-text: #ffffff;
    /* Mapping from --text-white */
    --classroom-text-secondary: #eae9f1;
    /* Mapping from --text-dark */
    --classroom-border: #404040;
    /* Mapping from --border-medium */
    --classroom-bg-secondary: #2b2b2b;
    /* Mapping from --bg-light */
}

/* =========================================
   Floating Action Button (Dashboard)
   ========================================= */
/* =========================================
   Sidebar Toggle Tab (Mobile)
   ========================================= */
.classroom-toggle {
    position: fixed;
    right: 0;
    /* top: 280px; */
    bottom: 200px;
    /* Below Notice (200px) and Events (120px) */
    background-color: var(--classroom-green);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    cursor: pointer;
    z-index: var(--z-sticky);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.classroom-toggle:hover {
    background-color: var(--classroom-green-hover);
    padding-right: var(--spacing-lg);
}

.classroom-toggle i {
    font-size: var(--font-lg);
    writing-mode: horizontal-tb;
}

/* Hide on desktop */
@media (min-width: 992px) {
    .classroom-toggle {
        display: none !important;
    }
}

/* =========================================
   Sidebar (Mobile)
   ========================================= */
.classroom-sidebar {
    position: fixed;
    top: 0;
    right: -100%;
    /* Hidden by default */
    width: 85%;
    max-width: 400px;
    height: 100%;
    background-color: var(--classroom-bg);
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1101;
    transition: right 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
}

.classroom-sidebar.open {
    right: 0;
}

.classroom-header {
    background-color: var(--classroom-green);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.classroom-header h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.classroom-close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    transition: transform 0.2s;
}

body.dark-mode .classroom-close-btn {
    color: #1a1c0d;
    /* Contrast for the light green banner */
}

.classroom-close-btn:hover {
    transform: rotate(90deg);
}

.classroom-content {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    background-color: var(--classroom-bg-secondary);
}

/* Overlay for Mobile Sidebar */
.classroom-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.classroom-overlay.visible {
    display: block;
    opacity: 1;
}

/* =========================================
   Modal (Desktop)
   ========================================= */
/* Reusing general modal styles, but adding specific class for size/color */
.classroom-modal-content {
    width: 90%;
    max-width: 1000px;
    /* Wider for desktop view */
    height: 80vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    border-radius: 8px;
}

.classroom-modal-header {
    background-color: var(--classroom-green);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

body.dark-mode .classroom-modal-header {
    color: #1a1c0d;
    /* Better contrast */
}

.classroom-modal-title {
    margin: 0;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.classroom-modal-body {
    flex: 1;
    overflow: hidden;
    /* Flex container for inner layout */
    display: flex;
    flex-direction: column;
    background-color: var(--classroom-bg-secondary);
}

/* =========================================
   Auth View / Login State
   ========================================= */
.classroom-auth-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 40px;
    text-align: center;
}

.classroom-login-btn {
    background-color: white;
    color: #3c4043;
    /* explicit light mode text */
    border: 1px solid var(--classroom-border);
    padding: 10px 24px;
    border-radius: 4px;
    /* Standard G-Suite style */
    font-weight: 500;
    font-family: 'Inter', 'Google Sans', Roboto, Arial, sans-serif;
    /* Try to match if available */
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    transition: background-color 0.2s, box-shadow 0.2s;
    font-size: 16px;
}

.classroom-login-btn:hover {
    background-color: #f1f3f4;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.classroom-login-btn img {
    width: 18px;
    height: 18px;
}

/* =========================================
   Main View Layout
   ========================================= */
.classroom-view-header {
    padding: 15px 20px;
    background-color: var(--classroom-bg);
    border-bottom: 1px solid var(--classroom-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.classroom-view-toggle {
    display: flex;
    background-color: var(--classroom-bg-secondary);
    border-radius: 20px;
    padding: 4px;
    border: 1px solid var(--classroom-border);
}

.view-toggle-btn {
    padding: 6px 16px;
    border-radius: 16px;
    border: none;
    background: none;
    color: var(--classroom-text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.view-toggle-btn.active {
    background-color: var(--classroom-bg);
    color: var(--classroom-green);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

/* =========================================
   Courses Grid / List
   ========================================= */
.classroom-courses-container {
    padding: 20px;
    overflow-y: auto;
    height: 100%;
}

.course-card {
    background-color: var(--classroom-bg);
    border: 1px solid var(--classroom-border);
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: box-shadow 0.2s;
    cursor: pointer;
}

.course-card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.course-header {
    background-color: var(--classroom-green);
    /* Fallback */
    height: 80px;
    padding: 16px;
    color: white;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-size: cover;
    background-position: center;
}

.course-title {
    font-size: 1.1rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-section {
    font-size: 0.85rem;
    opacity: 0.9;
}

.course-body {
    padding: 12px 16px;
}

.course-work-preview {
    font-size: 0.9rem;
    color: var(--classroom-text-secondary);
}

/* =========================================
   Stream / Work List Item
   ========================================= */
.classroom-list-container {
    padding: 0;
    background-color: var(--classroom-bg);
}

.classroom-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--classroom-border);
    display: flex;
    gap: 16px;
    transition: background-color 0.1s;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.classroom-item:hover {
    background-color: var(--classroom-bg-secondary);
}

.item-icon {
    width: 40px;
    height: 40px;
    background-color: var(--classroom-green);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    flex-shrink: 0;
}

.item-content {
    flex: 1;
    min-width: 0;
    /* Enable ellipsis */
}

.item-course-badge {
    display: inline-block;
    background-color: var(--classroom-bg-secondary);
    color: var(--classroom-text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 12px;
    margin-bottom: 4px;
    border: 1px solid var(--classroom-border);
}

.item-title {
    font-weight: 500;
    color: var(--classroom-text);
    margin: 0 0 4px 0;
    font-size: 1rem;
}

.item-meta {
    font-size: 0.85rem;
    color: var(--classroom-text-secondary);
    display: flex;
    gap: 10px;
    align-items: center;
}

.item-date {
    font-size: 0.8rem;
}

.item-snippet {
    color: var(--classroom-text-secondary);
    font-size: 0.9rem;
    margin-top: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Specific item types */
.item-icon.announcement {
    background-color: #1967d2;
}

.item-icon.assignment {
    background-color: var(--classroom-green);
}

/* =========================================
   Loading / Empty States
   ========================================= */
.classroom-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--classroom-text-secondary);
    gap: 10px;
}

.classroom-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--classroom-text-secondary);
}

.classroom-empty i {
    font-size: 48px;
    margin-bottom: 16px;
    color: #dadce0;
}

/* =========================================
   Expired Session Banner
   ========================================= */
.classroom-expired-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 16px;
    background-color: #fff8e1;
    border-bottom: 1px solid #ffe082;
    font-size: 0.85rem;
    color: #6d4c00;
    flex-wrap: wrap;
}

.expired-banner-content {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.expired-banner-content i {
    color: #f9a825;
    font-size: 1rem;
    flex-shrink: 0;
}

.expired-banner-btn {
    background-color: var(--classroom-green);
    color: white;
    border: none;
    padding: 6px 14px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.expired-banner-btn:hover {
    background-color: var(--classroom-green-hover);
}

/* Dark mode banner */
body.dark-mode .classroom-expired-banner {
    background-color: #2a2510;
    border-bottom-color: #4a3f1a;
    color: #e8d99a;
}

body.dark-mode .expired-banner-content i {
    color: #d4a017;
}

/* Gray mode banner */
body.gray-mode .classroom-expired-banner {
    background-color: #2b2520;
    border-bottom-color: #4a3a2a;
    color: #e8d9c8;
}

body.gray-mode .expired-banner-content i {
    color: #d4a060;
}

/* =========================================
   Back Button (Inner View)
   ========================================= */
.classroom-back-btn {
    color: var(--classroom-text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    border-radius: 50%;
    margin-right: 10px;
}

.classroom-back-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--classroom-text);
}