/* ============================================================
   SmartGradeAI - Custom Theme Stylesheet
   Framework: Bootstrap 5.3.3
   Version: 2.0
   ============================================================ */

/* ── Font Face: DM Sans (Self-Hosted) ────────────────────── */
@font-face {
    font-family: 'DM Sans';
    src: url('../vendor/fonts/DMSans-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'DM Sans';
    src: url('../vendor/fonts/DMSans-Medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'DM Sans';
    src: url('../vendor/fonts/DMSans-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'DM Sans';
    src: url('../vendor/fonts/DMSans-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* ── Root Variables ──────────────────────────────────────── */
:root {
    /* Primary - Electric Blue */
    --sg-primary: #4361EE;
    --sg-primary-rgb: 67, 97, 238;
    --sg-primary-light: #6B83F2;
    --sg-primary-dark: #3A56D4;
    --sg-primary-subtle: #EEF1FD;

    /* Secondary - Coral Pink */
    --sg-secondary: #F72585;
    --sg-secondary-light: #FF5DA0;
    --sg-secondary-subtle: #FEE8F2;

    /* Accent - Mint Green */
    --sg-accent: #06D6A0;
    --sg-accent-light: #2EEAB8;
    --sg-accent-subtle: #E6FAF4;

    /* Semantic */
    --sg-warning: #FFB703;
    --sg-warning-subtle: #FFF7E0;
    --sg-info: #00B4D8;
    --sg-info-subtle: #E0F7FC;
    --sg-danger: #EF476F;
    --sg-danger-subtle: #FDE8ED;
    --sg-success: #06D6A0;
    --sg-success-subtle: #E6FAF4;

    /* Neutral */
    --sg-bg: #F4F6FB;
    --sg-bg-card: #FFFFFF;
    --sg-text: #1A1D29;
    --sg-text-secondary: #6B7280;
    --sg-text-muted: #9CA3AF;
    --sg-border: #E5E7EB;
    --sg-border-light: #F0F1F3;

    /* Sidebar */
    --sg-sidebar-bg: #1A1D29;
    --sg-sidebar-text: #94A3B8;
    --sg-sidebar-hover: #252836;
    --sg-sidebar-active-bg: rgba(67, 97, 238, 0.12);
    --sg-sidebar-active-text: #4361EE;
    --sg-sidebar-width: 260px;
    --sg-sidebar-collapsed-width: 72px;

    /* Topbar */
    --sg-topbar-height: 64px;
    --sg-topbar-bg: #FFFFFF;

    /* Radius */
    --sg-radius-sm: 8px;
    --sg-radius-md: 12px;
    --sg-radius-lg: 16px;
    --sg-radius-xl: 24px;
    --sg-radius-full: 50px;

    /* Shadow */
    --sg-shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --sg-shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
    --sg-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --sg-shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
    --sg-shadow-xl: 0 16px 48px rgba(0,0,0,0.12);

    /* Transition */
    --sg-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sg-transition-fast: all 0.15s ease;
}

/* ── Dark Mode ───────────────────────────────────────────── */
[data-bs-theme="dark"] {
    --sg-bg: #0C0E16;
    --sg-bg-card: #151823;
    --sg-text: #F1F5F9;
    --sg-text-secondary: #94A3B8;
    --sg-text-muted: #64748B;
    --sg-border: #252836;
    --sg-border-light: #1E2133;
    --sg-topbar-bg: #151823;
    --sg-sidebar-bg: #0C0E16;
    --sg-shadow-sm: 0 1px 4px rgba(0,0,0,0.2);
    --sg-shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --sg-primary-subtle: rgba(67, 97, 238, 0.15);
    --sg-secondary-subtle: rgba(247, 37, 133, 0.15);
    --sg-accent-subtle: rgba(6, 214, 160, 0.15);
    --sg-warning-subtle: rgba(255, 183, 3, 0.15);
    --sg-info-subtle: rgba(0, 180, 216, 0.15);
    --sg-danger-subtle: rgba(239, 71, 111, 0.15);
    --sg-success-subtle: rgba(6, 214, 160, 0.15);
}

/* ── Base ─────────────────────────────────────────────────── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--sg-bg);
    color: var(--sg-text);
    font-size: 0.9375rem;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--sg-primary);
    transition: var(--sg-transition-fast);
}
a:hover {
    color: var(--sg-primary-dark);
}

/* ── Topbar ──────────────────────────────────────────────── */
.sg-topbar {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sg-sidebar-width);
    height: var(--sg-topbar-height);
    background: var(--sg-topbar-bg);
    border-bottom: 1px solid var(--sg-border);
    z-index: 1030;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    transition: var(--sg-transition);
    backdrop-filter: blur(12px);
}

.sg-topbar .sg-search {
    position: relative;
    max-width: 360px;
    flex: 1;
}

.sg-topbar .sg-search input {
    background: var(--sg-bg);
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-full);
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    font-size: 0.875rem;
    color: var(--sg-text);
    width: 100%;
    transition: var(--sg-transition);
}
.sg-topbar .sg-search input:focus {
    border-color: var(--sg-primary);
    box-shadow: 0 0 0 3px rgba(var(--sg-primary-rgb), 0.15);
    outline: none;
}

.sg-topbar .sg-search .bi-search {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--sg-text-muted);
    font-size: 0.875rem;
}

.sg-topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-left: auto;
}

.sg-topbar-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--sg-radius-md);
    border: none;
    background: transparent;
    color: var(--sg-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--sg-transition-fast);
    position: relative;
}
.sg-topbar-btn:hover {
    background: var(--sg-bg);
    color: var(--sg-primary);
}

.sg-topbar-btn .sg-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--sg-danger);
    border-radius: 50%;
    border: 2px solid var(--sg-topbar-bg);
}

.sg-user-btn {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.375rem 0.75rem 0.375rem 0.375rem;
    border-radius: var(--sg-radius-full);
    border: 1px solid var(--sg-border);
    background: transparent;
    cursor: pointer;
    transition: var(--sg-transition-fast);
}
.sg-user-btn:hover {
    background: var(--sg-bg);
    border-color: var(--sg-primary);
}
.sg-user-btn img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}
.sg-user-avatar-initial {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--sg-primary-subtle, #e0e7ff);
    color: var(--sg-primary);
    font-weight: 700;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.sg-user-btn .sg-user-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--sg-text);
    line-height: 1.2;
}
.sg-user-btn .sg-user-role {
    font-size: 0.6875rem;
    color: var(--sg-text-muted);
    line-height: 1.2;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sg-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sg-sidebar-width);
    height: 100vh;
    background: var(--sg-sidebar-bg);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: var(--sg-transition);
    overflow: hidden;
}

.sg-sidebar-brand {
    height: var(--sg-topbar-height);
    display: flex;
    align-items: center;
    padding: 0 1.25rem;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    flex-shrink: 0;
}

.sg-sidebar-brand .sg-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--sg-primary), var(--sg-secondary));
    border-radius: var(--sg-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.sg-sidebar-brand .sg-brand-text {
    color: #fff;
    font-weight: 600;
    font-size: 1.0625rem;
    white-space: nowrap;
}
.sg-sidebar-brand .sg-brand-text span {
    color: var(--sg-accent);
}

.sg-sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0.75rem;
}

/* Scrollbar for sidebar */
.sg-sidebar-nav::-webkit-scrollbar {
    width: 4px;
}
.sg-sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
}

.sg-nav-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255,255,255,0.3);
    padding: 0.75rem 0.75rem 0.5rem;
    font-weight: 600;
}

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

.sg-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    border-radius: var(--sg-radius-sm);
    color: var(--sg-sidebar-text);
    font-size: 0.875rem;
    font-weight: 400;
    transition: var(--sg-transition-fast);
    position: relative;
    text-decoration: none;
}
.sg-nav-link i {
    font-size: 1.125rem;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.sg-nav-link:hover {
    background: var(--sg-sidebar-hover);
    color: #fff;
}

.sg-nav-link.active {
    background: var(--sg-sidebar-active-bg);
    color: var(--sg-sidebar-active-text);
    font-weight: 500;
}
.sg-nav-link.active::before {
    content: '';
    position: absolute;
    left: -0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--sg-primary);
    border-radius: 0 4px 4px 0;
}

.sg-nav-link .sg-nav-badge {
    margin-left: auto;
    background: var(--sg-danger);
    color: #fff;
    font-size: 0.6875rem;
    padding: 0.125rem 0.5rem;
    border-radius: var(--sg-radius-full);
    font-weight: 600;
}

.sg-sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255,255,255,0.06);
    flex-shrink: 0;
}

/* ── Main Content ────────────────────────────────────────── */
.sg-main-content {
    margin-left: var(--sg-sidebar-width);
    margin-top: var(--sg-topbar-height);
    min-height: calc(100vh - var(--sg-topbar-height));
    padding: 1.5rem;
    transition: var(--sg-transition);
}

/* ── Page Header ─────────────────────────────────────────── */
.sg-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.sg-page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--sg-text);
    margin: 0;
}

/* ── Breadcrumb ──────────────────────────────────────────── */
.sg-breadcrumb {
    padding: 0;
    margin-bottom: 0.75rem;
    background: transparent;
}
.sg-breadcrumb .breadcrumb-item {
    font-size: 0.8125rem;
    color: var(--sg-text-muted);
}
.sg-breadcrumb .breadcrumb-item a {
    color: var(--sg-text-secondary);
}
.sg-breadcrumb .breadcrumb-item a:hover {
    color: var(--sg-primary);
}
.sg-breadcrumb .breadcrumb-item.active {
    color: var(--sg-text);
    font-weight: 500;
}
.sg-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
    content: '\F285';
    font-family: 'bootstrap-icons';
    font-size: 0.625rem;
    color: var(--sg-text-muted);
}

/* ── Cards ────────────────────────────────────────────────── */
.sg-card {
    background: var(--sg-bg-card);
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-md);
    box-shadow: var(--sg-shadow-xs);
    transition: var(--sg-transition);
}
.sg-card:hover {
    box-shadow: var(--sg-shadow-sm);
}

/* Stat Card */
.sg-stat-card {
    background: var(--sg-bg-card);
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-md);
    box-shadow: var(--sg-shadow-xs);
    transition: var(--sg-transition);
}
.sg-stat-card:hover {
    box-shadow: var(--sg-shadow-md);
    transform: translateY(-2px);
}

.sg-stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--sg-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* Course Card */
.sg-course-card {
    background: var(--sg-bg-card);
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-lg);
    overflow: hidden;
    transition: var(--sg-transition);
    cursor: pointer;
}
.sg-course-card:hover {
    box-shadow: var(--sg-shadow-lg);
    transform: translateY(-4px);
}

.sg-course-header {
    padding: 1.25rem;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    position: relative;
    overflow: hidden;
}
.sg-course-header::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}
.sg-course-header::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: -10px;
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn-sg-primary {
    background: var(--sg-primary);
    border: none;
    color: #fff;
    border-radius: var(--sg-radius-sm);
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    transition: var(--sg-transition);
}
.btn-sg-primary:hover {
    background: var(--sg-primary-dark);
    color: #fff;
    box-shadow: 0 4px 12px rgba(var(--sg-primary-rgb), 0.35);
    transform: translateY(-1px);
}

.btn-sg-secondary {
    background: transparent;
    border: 1px solid var(--sg-border);
    color: var(--sg-text);
    border-radius: var(--sg-radius-sm);
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    transition: var(--sg-transition);
}
.btn-sg-secondary:hover {
    border-color: var(--sg-primary);
    color: var(--sg-primary);
    background: var(--sg-primary-subtle);
}

/* Pill Button */
.btn-pill {
    border-radius: var(--sg-radius-full) !important;
}

/* ── Stepper ─────────────────────────────────────────────── */
.sg-stepper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 1.5rem 0;
}

.sg-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
}

.sg-step-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--sg-border);
    background: var(--sg-bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--sg-text-muted);
    transition: var(--sg-transition);
}

.sg-step.active .sg-step-circle {
    border-color: var(--sg-primary);
    background: var(--sg-primary);
    color: #fff;
    box-shadow: 0 0 0 4px var(--sg-primary-subtle);
}
.sg-step.completed .sg-step-circle {
    border-color: var(--sg-success);
    background: var(--sg-success);
    color: #fff;
}

.sg-step small {
    font-size: 0.75rem;
    color: var(--sg-text-muted);
    font-weight: 500;
}
.sg-step.active small {
    color: var(--sg-primary);
    font-weight: 600;
}

.sg-step-line {
    flex: 1;
    height: 2px;
    background: var(--sg-border);
    margin: 0 0.5rem;
    margin-bottom: 1.5rem;
    transition: var(--sg-transition);
}
.sg-step-line.active {
    background: var(--sg-primary);
}

/* ── Tables (Card Stack on Mobile) ───────────────────────── */
.sg-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}
.sg-table thead th {
    background: var(--sg-bg);
    border-bottom: 1px solid var(--sg-border);
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sg-text-secondary);
    white-space: nowrap;
}
.sg-table tbody td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--sg-border-light);
    font-size: 0.875rem;
    vertical-align: middle;
}
.sg-table tbody tr:hover {
    background: var(--sg-primary-subtle);
}

/* ── Chatbot Widget ──────────────────────────────────────── */
.sg-chatbot-fab {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sg-primary), var(--sg-secondary));
    border: none;
    color: #fff;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(var(--sg-primary-rgb), 0.4);
    z-index: 1050;
    transition: var(--sg-transition);
}
.sg-chatbot-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(var(--sg-primary-rgb), 0.5);
}

.sg-chatbot-window {
    position: fixed;
    bottom: 6rem;
    right: 1.5rem;
    width: 380px;
    max-height: 500px;
    background: var(--sg-bg-card);
    border-radius: var(--sg-radius-lg);
    box-shadow: var(--sg-shadow-xl);
    border: 1px solid var(--sg-border);
    z-index: 1050;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(20px);
    opacity: 0;
    visibility: hidden;
    transition: var(--sg-transition);
}
.sg-chatbot-window.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.sg-chat-header {
    background: linear-gradient(135deg, var(--sg-primary), var(--sg-primary-dark));
    color: #fff;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sg-chat-header h6 {
    margin: 0;
    font-weight: 600;
}

.sg-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 340px;
}

.sg-chat-bubble {
    max-width: 85%;
    padding: 0.625rem 1rem;
    border-radius: var(--sg-radius-md);
    font-size: 0.8125rem;
    line-height: 1.5;
}
.sg-chat-bubble.user {
    background: var(--sg-primary);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}
.sg-chat-bubble.ai {
    background: var(--sg-bg);
    color: var(--sg-text);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.sg-chat-input {
    border-top: 1px solid var(--sg-border);
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
}
.sg-chat-input input {
    flex: 1;
    border: 1px solid var(--sg-border);
    border-radius: var(--sg-radius-full);
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    background: var(--sg-bg);
    color: var(--sg-text);
    outline: none;
}
.sg-chat-input input:focus {
    border-color: var(--sg-primary);
}
.sg-chat-input button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--sg-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--sg-transition-fast);
    flex-shrink: 0;
}
.sg-chat-input button:hover {
    background: var(--sg-primary-dark);
}

/* Typing indicator */
.sg-typing-indicator {
    display: flex;
    gap: 4px;
    padding: 0.625rem 1rem;
    align-self: flex-start;
}
.sg-typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--sg-text-muted);
    border-radius: 50%;
    animation: sg-bounce 1.4s ease-in-out infinite;
}
.sg-typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.sg-typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes sg-bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

/* ── Empty State ─────────────────────────────────────────── */
.sg-empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}
.sg-empty-state img,
.sg-empty-state svg {
    max-width: 200px;
    margin-bottom: 1.5rem;
    opacity: 0.8;
}
.sg-empty-state h5 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.sg-empty-state p {
    color: var(--sg-text-secondary);
    margin-bottom: 1.5rem;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
}

/* ── Form Styles ─────────────────────────────────────────── */
.form-control,
.form-select {
    border-radius: var(--sg-radius-sm);
    border: 1px solid var(--sg-border);
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    transition: var(--sg-transition-fast);
}
.form-control:focus,
.form-select:focus {
    border-color: var(--sg-primary);
    box-shadow: 0 0 0 3px rgba(var(--sg-primary-rgb), 0.12);
}

.form-label {
    font-weight: 500;
    font-size: 0.8125rem;
    margin-bottom: 0.375rem;
    color: var(--sg-text);
}

/* ── Badge Overrides ─────────────────────────────────────── */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.25rem 0.625rem;
    border-radius: var(--sg-radius-full);
}

/* ── Toast Override ──────────────────────────────────────── */
.sg-toast-container {
    position: fixed;
    top: calc(var(--sg-topbar-height) + 1rem);
    right: 1.5rem;
    z-index: 1060;
}

/* ── Skeleton Loader ─────────────────────────────────────── */
.sg-skeleton {
    background: linear-gradient(90deg, var(--sg-border-light) 25%, var(--sg-bg) 50%, var(--sg-border-light) 75%);
    background-size: 200% 100%;
    animation: sg-shimmer 1.5s infinite;
    border-radius: var(--sg-radius-sm);
}
@keyframes sg-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ── Animations ──────────────────────────────────────────── */
.sg-fade-in {
    animation: sg-fadeIn 0.4s ease forwards;
}
@keyframes sg-fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.sg-slide-up {
    animation: sg-slideUp 0.3s ease forwards;
}
@keyframes sg-slideUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 991.98px) {
    .sg-sidebar {
        transform: translateX(-100%);
    }
    .sg-sidebar.show {
        transform: translateX(0);
    }

    .sg-topbar {
        left: 0;
    }

    .sg-main-content {
        margin-left: 0;
    }

    /* Sidebar overlay */
    .sg-sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 1035;
        opacity: 0;
        visibility: hidden;
        transition: var(--sg-transition);
    }
    .sg-sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 767.98px) {
    .sg-main-content {
        padding: 1rem;
    }

    .sg-page-title {
        font-size: 1.25rem;
    }

    .sg-topbar .sg-search {
        display: none;
    }

    .sg-user-btn .sg-user-info {
        display: none;
    }

    /* Chatbot full-width on mobile */
    .sg-chatbot-window {
        right: 0.75rem;
        left: 0.75rem;
        bottom: 5rem;
        width: auto;
        max-height: 70vh;
    }

    /* Table card stack */
    .sg-table-responsive-cards thead {
        display: none;
    }
    .sg-table-responsive-cards tbody tr {
        display: block;
        background: var(--sg-bg-card);
        border: 1px solid var(--sg-border);
        border-radius: var(--sg-radius-md);
        margin-bottom: 0.75rem;
        padding: 0.75rem 1rem;
    }
    .sg-table-responsive-cards tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.375rem 0;
        border: none;
    }
    .sg-table-responsive-cards tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        font-size: 0.75rem;
        color: var(--sg-text-secondary);
        text-transform: uppercase;
        margin-right: 1rem;
    }
}

@media (max-width: 575.98px) {
    .sg-main-content {
        padding: 0.75rem;
    }

    .sg-stat-card .card-body {
        padding: 1rem;
    }

    .sg-stepper {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding: 1rem 0;
    }
}

/* ── Utility Classes ─────────────────────────────────────── */
.bg-sg-primary-subtle { background: var(--sg-primary-subtle) !important; }
.bg-sg-secondary-subtle { background: var(--sg-secondary-subtle) !important; }
.bg-sg-accent-subtle { background: var(--sg-accent-subtle) !important; }
.bg-sg-warning-subtle { background: var(--sg-warning-subtle) !important; }
.bg-sg-danger-subtle { background: var(--sg-danger-subtle) !important; }
.bg-sg-success-subtle { background: var(--sg-success-subtle) !important; }

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