/* ========================================
   AI EduDesk - Base Styles
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Primary Colors */
    --primary-color: #3B82F6;
    --primary-dark: #2563EB;
    --primary-light: #60A5FA;

    /* Sidebar Colors */
    --sidebar-bg: #FFFFFF;
    --sidebar-text: var(--gray-700);
    --sidebar-active-bg: var(--primary-color);
    --sidebar-active-text: #FFFFFF;

    /* Semantic Colors */
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;

    /* AI Theme */
    --ai-color: #8B5CF6;
    --ai-light: #A78BFA;

    /* Neutral Colors */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Layout */
    --header-height: 56px;
    --sidebar-width: 240px;
    --sidebar-icon-width: 64px;
    --content-max-width: 1200px;

    /* Spacing */
    --gap-xs: 0.25rem;
    --gap-sm: 0.5rem;
    --gap-md: 1rem;
    --gap-lg: 2rem;
    --gap-xl: 2rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
}

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

html {
    font-size: 16px;
}

body {
    font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--gray-800);
    background-color: var(--gray-50);
    overflow-x: hidden;
    overflow-y: scroll;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-dark);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 5px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

* {
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.15) transparent;
}

/* ========================================
   Layout Structure
   ======================================== */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: #FFFFFF;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1002;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-hamburger {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--gray-600);
    cursor: pointer;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.header-hamburger:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
}

.header-title i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

@media (max-width: 767.98px) {
    .header-title {
        font-size: 1rem;
    }
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-action {
    position: relative;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--gray-600);
    cursor: pointer;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.header-action:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.header-action .badge {
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 0.6rem;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 10px;
    background: var(--danger-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Body Container */
.app-body {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* Sidebar Overlay (모바일) */
.sidebar-overlay {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Sidebar
   ======================================== */
.app-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    border-right: 1px solid var(--gray-200);
    z-index: 1001;
    overflow-y: auto;
    overflow-x: hidden;
    transition: transform 0.3s ease, width 0.3s ease;
    display: flex;
    flex-direction: column;
}

.app-sidebar:not(.show) {
    transform: translateX(-100%);
}

.app-sidebar.show {
    transform: translateX(0);
}

/* Sidebar Nav */
.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0.75rem;
    overflow-y: auto;
}

.nav-item {
    margin-bottom: 2px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--gap-sm);
    padding: 0.625rem 0.75rem;
    color: var(--sidebar-text);
    border-radius: var(--radius-md);
    transition: background var(--transition-base);
    cursor: pointer;
    font-size: 1rem;
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.nav-link.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    font-weight: 600;
}

.nav-link i {
    font-size: 1.125rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.nav-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Sidebar Accordion */
.nav-accordion {
    margin-bottom: 2px;
}

.accordion-header {
    display: flex;
    align-items: center;
    gap: var(--gap-sm);
    padding: 0.625rem 0.75rem;
    color: var(--sidebar-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-base);
    font-size: 1rem;
}

.accordion-header:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.accordion-header .icon {
    font-size: 1.125rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.accordion-header .chevron {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform var(--transition-base);
}

.accordion-header.active .chevron {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-content.open {
    max-height: 500px;
}

.accordion-content .nav-link {
    padding-left: 2.75rem;
    font-size: 0.9rem;
}

/* ========================================
   Main Content
   ======================================== */
.app-main {
    width: 100%;
    padding: var(--gap-lg);
    margin-left: 0;
    min-height: calc(100vh - var(--header-height));
    transition: margin-left 0.3s ease;
}

.app-main.with-sidebar {
    margin-left: var(--sidebar-width);
}

@media (max-width: 767.98px) {
    .app-main {
        padding: 1rem;
    }
    .app-main.with-sidebar {
        margin-left: 0;
    }
}

/* ========================================
   User Menu (Header)
   ======================================== */
.user-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    transition: background var(--transition-base);
}

.user-menu:hover {
    background: var(--gray-100);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.user-avatar.avatar-sm {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
}

.user-info {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.user-name {
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--gray-800);
}

.user-role {
    font-size: 0.6875rem;
    color: var(--gray-500);
}

/* User Dropdown */
.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 220px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    z-index: 2000;
    overflow: hidden;
}

.user-dropdown-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.user-dropdown-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.user-dropdown-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--gray-800);
}

.user-dropdown-role {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.user-dropdown-divider {
    height: 1px;
    background: var(--gray-200);
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1rem;
    color: var(--gray-700);
    cursor: pointer;
    transition: background var(--transition-base);
    font-size: 0.8125rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.user-dropdown-item:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.user-dropdown-item.text-danger {
    color: var(--danger-color);
}

.user-dropdown-item.text-danger:hover {
    background: #FEF2F2;
}

/* ========================================
   Login Page
   ======================================== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #EFF6FF 0%, #F5F3FF 50%, #EFF6FF 100%);
    padding: 2rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #FFFFFF;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    padding: 2.5rem 2rem 1.5rem;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--ai-color));
    color: #FFFFFF;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
}

.login-body {
    padding: 2rem;
}

.login-form-group {
    margin-bottom: 1.25rem;
}

.login-form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.login-form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    outline: none;
}

.login-form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.login-form-control::placeholder {
    color: var(--gray-400);
}

.password-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: none;
    color: var(--gray-400);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
}

.password-toggle:hover {
    color: var(--gray-600);
}

.btn-login {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border: none;
    color: #FFFFFF;
    font-weight: 600;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.btn-login:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: #FFFFFF;
}

.btn-login:disabled {
    opacity: 0.7;
    transform: none;
    box-shadow: none;
}

.login-divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: var(--gray-400);
    font-size: 0.75rem;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    border-top: 1px solid var(--gray-200);
}

.login-divider span {
    padding: 0 1rem;
}

.demo-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-demo {
    flex: 1;
    min-width: 0;
    padding: 0.5rem 0.25rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    background: #FFFFFF;
    color: var(--gray-600);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.btn-demo:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: #EFF6FF;
}

.btn-demo i {
    font-size: 1rem;
}

.login-footer {
    padding: 1rem 2rem 1.5rem;
    border-top: 1px solid var(--gray-100);
}

.login-error {
    padding: 0.75rem 1rem;
    background: #FEF2F2;
    border: 1px solid #FECACA;
    border-radius: var(--radius-sm);
    color: #991B1B;
    font-size: 0.8125rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    margin-bottom: 1.5rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.page-subtitle,
h4.fw-bold + .text-secondary {
    font-size: 0.8125rem;
}

.page-subtitle {
    color: var(--gray-500);
    margin: 0;
}

/* ========================================
   Cards
   ======================================== */
.card {
    background: #FFFFFF;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-hover:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    transition: all var(--transition-base);
}

/* Stat Card */
.stat-card {
    display: flex;
    align-items: center;
    gap: var(--gap-md);
    background: #FFFFFF;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-icon-primary { background: rgba(59, 130, 246, 0.1); color: var(--primary-color); }
.stat-icon-success { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.stat-icon-danger  { background: rgba(239, 68, 68, 0.1);  color: var(--danger-color); }
.stat-icon-warning { background: rgba(245, 158, 11, 0.1); color: var(--warning-color); }
.stat-icon-ai      { background: rgba(139, 92, 246, 0.1); color: var(--ai-color); }
.stat-icon-info    { background: rgba(59, 130, 246, 0.1); color: var(--info-color); }

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--gray-500);
    font-weight: 500;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

/* ========================================
   Buttons
   ======================================== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border: none;
    color: #FFFFFF;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-ai {
    background: linear-gradient(135deg, var(--ai-color), var(--ai-light));
    border: none;
    color: #FFFFFF;
    font-weight: 600;
}

.btn-ai:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    color: #FFFFFF;
}

/* ========================================
   Badges
   ======================================== */
.badge-primary { background: rgba(59, 130, 246, 0.1); color: var(--primary-color); }
.badge-success { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.badge-danger  { background: rgba(239, 68, 68, 0.1);  color: var(--danger-color); }
.badge-warning   { background: rgba(245, 158, 11, 0.1); color: var(--warning-color); }
.badge-secondary { background: var(--gray-100); color: var(--gray-500); }
.badge-ai        { background: rgba(139, 92, 246, 0.1); color: var(--ai-color); }

/* ========================================
   Tables
   ======================================== */
.table thead {
    background: var(--gray-50);
}

.table th {
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
}

.table td {
    color: var(--gray-800);
    vertical-align: middle;
}

.table tbody tr:hover {
    background: var(--gray-50);
}

/* ========================================
   Forms
   ======================================== */
.form-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ========================================
   Progress Bars
   ======================================== */
.progress-bar-container {
    width: 100%;
}

.progress-bar-track {
    height: 10px;
    background: var(--gray-200);
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-track.xs { height: 4px; }
.progress-bar-track.sm { height: 6px; }

.progress-bar-fill {
    height: 100%;
    border-radius: 5px;
    transition: width var(--transition-slow);
}

.progress-bar-fill.green  { background: linear-gradient(90deg, #10B981, #34D399); }
.progress-bar-fill.yellow { background: linear-gradient(90deg, #F59E0B, #FBBF24); }
.progress-bar-fill.red    { background: linear-gradient(90deg, #EF4444, #F87171); }
.progress-bar-fill.ai     { background: linear-gradient(90deg, #8B5CF6, #A78BFA); }
.progress-bar-fill.blue   { background: linear-gradient(90deg, #3B82F6, #60A5FA); }

.progress-sm {
    height: 6px;
}

.progress-xs {
    height: 4px;
}

/* ========================================
   Modals
   ======================================== */
.modal-content {
    border: none;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: #FFFFFF;
    border-bottom: none;
    padding: 1.25rem 1.5rem;
}

.modal-header .modal-title {
    font-weight: 700;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-header.danger {
    background: linear-gradient(135deg, var(--danger-color), #F87171);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* ========================================
   Toast
   ======================================== */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
}

.toast-success { background: #ECFDF5; color: #065F46; border-left: 4px solid var(--success-color); }
.toast-error   { background: #FEF2F2; color: #991B1B; border-left: 4px solid var(--danger-color); }
.toast-warning { background: #FFFBEB; color: #92400E; border-left: 4px solid var(--warning-color); }
.toast-info    { background: #EFF6FF; color: #1E40AF; border-left: 4px solid var(--info-color); }

/* ========================================
   Empty & Error States
   ======================================== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--gray-300);
}

.empty-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.empty-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.error-state {
    text-align: center;
    padding: 3rem 1rem;
}

.error-state i {
    font-size: 3rem;
    color: var(--warning-color);
    margin-bottom: 1rem;
}

/* ========================================
   Quick Menu (Dashboard)
   ======================================== */
.quick-menu {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.quick-menu-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0.5rem;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    color: var(--gray-700);
    transition: all var(--transition-base);
    cursor: pointer;
}

.quick-menu-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
    transform: translateY(-2px);
}

.quick-menu-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
}

.quick-menu-item:hover .quick-menu-icon {
    background: rgba(59, 130, 246, 0.1);
}

.quick-menu-label {
    font-size: 0.75rem;
    font-weight: 600;
}

/* ========================================
   Schedule Widget
   ======================================== */
.schedule-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    border-left: 3px solid transparent;
    transition: background var(--transition-base);
}

.schedule-item:not(:last-child) {
    border-bottom: 1px solid var(--gray-100);
}

.schedule-item.current {
    background: rgba(59, 130, 246, 0.05);
    border-left-color: var(--primary-color);
}

.schedule-item.free {
    opacity: 0.45;
}

.schedule-period {
    width: 48px;
    font-weight: 700;
    color: var(--gray-700);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.schedule-subject {
    font-weight: 600;
    color: var(--gray-800);
    min-width: 72px;
}

.schedule-class {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.schedule-time {
    color: var(--gray-400);
    font-size: 0.8125rem;
    margin-left: auto;
    flex-shrink: 0;
}

.schedule-current-badge {
    font-size: 0.65rem;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    color: #fff;
    font-weight: 600;
    flex-shrink: 0;
}

/* ========================================
   Utilities
   ======================================== */
.fs-7  { font-size: 0.75rem; }
.fs-8  { font-size: 0.7rem; }
.text-xs  { font-size: 0.75rem; }
.text-xxs { font-size: 0.7rem; }

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger  { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-ai      { color: var(--ai-color) !important; }

.bg-ai { background-color: rgba(139, 92, 246, 0.1) !important; }

.cursor-pointer { cursor: pointer; }
.min-width-0 { min-width: 0; }
.max-h-300 { max-height: 300px; overflow-y: auto; }

/* Student List */
.student-list {
    max-height: 480px;
    overflow-y: auto;
}

.student-list-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.625rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-base);
    margin-bottom: 2px;
}

.student-list-item:hover {
    background: var(--gray-100);
}

.student-list-item.active {
    background: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--primary-color);
}

/* AI Loading */
.ai-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--ai-color);
}

.spinner-border.text-purple {
    color: var(--ai-color);
}

/* Forbidden word highlight */
.forbidden-word {
    background: #FEE2E2;
    text-decoration: underline;
    text-decoration-color: var(--danger-color);
    cursor: pointer;
    position: relative;
}

/* Dashboard activity item */
.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
    cursor: pointer;
    transition: background var(--transition-base);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-item:hover {
    background: var(--gray-50);
    border-radius: var(--radius-sm);
}

.activity-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.activity-icon.write { background: rgba(59, 130, 246, 0.1); color: var(--primary-color); }
.activity-icon.voice { background: rgba(139, 92, 246, 0.1); color: var(--ai-color); }
.activity-icon.doc   { background: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.activity-icon.eval  { background: rgba(245, 158, 11, 0.1); color: var(--warning-color); }

/* Recording Indicator */
.recording-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--danger-color);
    animation: recording-blink 1s ease-in-out infinite;
}

@keyframes recording-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}