/* 
 * meravidyalaya.hindiguruji.in - Premium Global CSS
 * Supports Light Theme by default and Auto-Dark Theme.
 */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Noto+Sans+Devanagari:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-gradient: radial-gradient(circle at 10% 20%, #f3f0ff 0%, #e0f2fe 50%, #ecfdf5 100%);
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.6);
    --primary-color: #0d9488;
    --primary-hover: #0f766e;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-focus: #0d9488;
    --error-bg: #fee2e2;
    --error-text: #991b1b;
    --success-bg: #d1fae5;
    --success-text: #065f46;

    /* Premium Sidebar variables */
    --sidebar-bg: rgba(255, 255, 255, 0.45);
    --sidebar-border: rgba(255, 255, 255, 0.6);
    --sidebar-text: #0f172a;
    --sidebar-link: #475569;
    --sidebar-link-active-bg: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
    --sidebar-brand-bg: rgba(255, 255, 255, 0.6);
    --sidebar-brand-border: rgba(255, 255, 255, 0.8);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-gradient: radial-gradient(circle at 10% 20%, #0b0f19 0%, #111827 50%, #030712 100%);
        --bg-color: #030712;
        --text-color: #cbd5e1;
        --card-bg: rgba(17, 24, 39, 0.65);
        --card-border: rgba(255, 255, 255, 0.08);
        --primary-color: #10b981;
        --primary-hover: #059669;
        --input-bg: #0b0f19;
        --input-border: #334155;
        --input-focus: #10b981;
        --error-bg: rgba(239, 68, 68, 0.15);
        --error-text: #fca5a5;
        --success-bg: rgba(16, 185, 129, 0.15);
        --success-text: #a7f3d0;

        /* Premium Sidebar variables (Dark Mode) */
        --sidebar-bg: rgba(15, 23, 42, 0.45);
        --sidebar-border: rgba(255, 255, 255, 0.05);
        --sidebar-text: #e2e8f0;
        --sidebar-link: #94a3b8;
        --sidebar-link-active-bg: linear-gradient(135deg, #10b981 0%, #059669 100%);
        --sidebar-brand-bg: rgba(30, 41, 59, 0.6);
        --sidebar-brand-border: rgba(255, 255, 255, 0.03);
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Outfit', 'Noto Sans Devanagari', sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Container & Layout */
.app-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.split-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    width: 100%;
    align-items: center;
}

@media (max-width: 768px) {
    .split-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* Brand Section */
.brand-section {
    padding: 20px;
}

.brand-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 15px;
}

.brand-subtitle {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 30px;
}

.brand-features-box {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
}

.brand-features-box h4 {
    color: var(--primary-color);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.brand-features-box ul {
    list-style: none;
}

.brand-features-box li {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
}

.brand-features-box li::before {
    content: "✨";
    position: absolute;
    left: 0;
    top: 0;
}

/* Card & Forms */
.form-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    width: 100%;
}

.card-header {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 25px;
    text-align: center;
}

/* Tab styling (if any) */
.form-tabs {
    display: flex;
    border-bottom: 1px solid var(--input-border);
    margin-bottom: 20px;
}

.tab-link {
    flex: 1;
    text-align: center;
    padding: 10px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    opacity: 0.6;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
}

.tab-link.active {
    opacity: 1;
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Alert Boxes */
.alert {
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.alert-error {
    background-color: var(--error-bg);
    color: var(--error-text);
    border-left: 4px solid #ef4444;
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border-left: 4px solid #10b981;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.15);
    color: #1e40af;
    border-left: 4px solid #3b82f6;
}

/* Dark mode override for info alerts is handled via variables or custom colors */
@media (prefers-color-scheme: dark) {
    .alert-info {
        background-color: rgba(59, 130, 246, 0.25);
        color: #93c5fd;
        border-left: 4px solid #60a5fa;
    }
}


/* Inputs & Form Groups */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 8px;
    opacity: 0.9;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

/* Buttons */
.btn {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.2);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(13, 148, 136, 0.3);
}

.btn:active {
    transform: translateY(0);
}

/* Main Layout with Sidebar */
.main-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
    width: 100%;
    transition: grid-template-columns 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (max-width: 992px) {
    .main-layout {
        grid-template-columns: 1fr;
        transition: none;
    }
}

/* Sidebar styling */
.sidebar {
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--sidebar-text);
    padding: 25px 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 1px solid var(--sidebar-border);
    border-radius: 24px;
    height: calc(100vh - 30px);
    position: sticky;
    top: 15px;
    margin: 15px 0 15px 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.04);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

@media (max-width: 992px) {
    .sidebar {
        height: auto;
        position: relative;
        margin: 15px;
        top: 0;
        padding: 15px;
        border-radius: 20px;
    }
}

.sidebar-brand-box {
    text-align: center;
    padding: 20px 15px;
    background: var(--sidebar-brand-bg);
    border-radius: 16px;
    border: 1px solid var(--sidebar-brand-border);
    margin-bottom: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.01);
}

.sidebar-brand-box h2 {
    color: var(--primary-color);
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 5px;
    letter-spacing: -0.5px;
}

.sidebar-brand-box p {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-color);
}

.sidebar-brand-box small {
    font-size: 0.78rem;
    color: var(--text-color);
    opacity: 0.6;
    display: block;
    margin-top: 5px;
    font-weight: 600;
}

.sidebar-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.sidebar-menu a {
    color: var(--sidebar-link);
    text-decoration: none;
    padding: 12px 18px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
}

.sidebar-menu a:hover {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-color);
    transform: translateX(4px);
}

.sidebar-menu a.active {
    background: var(--sidebar-link-active-bg);
    color: white !important;
    box-shadow: 0 8px 20px rgba(13, 148, 136, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: dark) {
    .sidebar-menu a.active {
        box-shadow: 0 8px 20px rgba(16, 185, 129, 0.15);
    }
}

.developer-credit-box {
    text-align: center;
    margin-top: 20px;
    padding: 15px 12px;
    background: var(--sidebar-brand-bg);
    border-radius: 14px;
    border: 1px dashed var(--sidebar-brand-border);
    font-size: 0.8rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.01);
}

.developer-credit-box small {
    color: #94a3b8;
    display: block;
    margin-bottom: 3px;
}

.developer-credit-box b {
    color: #10b981;
}

.developer-credit-box span {
    color: #cbd5e1;
    display: block;
    font-size: 0.75rem;
}

@media (max-width: 992px) {
    .sidebar-brand-box {
        margin-bottom: 12px;
        padding: 12px;
    }

    .sidebar-menu {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 8px;
        width: 100%;
        gap: 8px;
        scrollbar-width: none;
    }

    .sidebar-menu::-webkit-scrollbar {
        display: none;
    }

    .sidebar-menu li {
        white-space: nowrap;
    }

    .sidebar-menu a {
        padding: 8px 14px;
        font-size: 0.88rem;
    }

    .sidebar-menu a:hover {
        transform: none;
    }

    .developer-credit-box {
        display: none;
    }
}

/* Main Content Panel */
.main-content {
    padding: 30px;
    background-color: var(--bg-color);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

@media (max-width: 576px) {
    .main-content {
        padding: 15px;
    }
}

.header-box {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-left: 6px solid var(--primary-color);
    border-top: 1px solid var(--card-border);
    border-right: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 15px 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.header-box h1 {
    font-size: 1.4rem;
    font-weight: 800;
}

.header-box p {
    font-size: 0.9rem;
    font-weight: 600;
    opacity: 0.8;
}

/* Quote/Suvichar Box */
.suvichar-box {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(13, 148, 136, 0.08) 100%);
    border-left: 5px solid #10b981;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.01);
}

.suvichar-box h4 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 1rem;
}

.suvichar-box p {
    font-size: 1.15rem;
    font-style: italic;
    line-height: 1.5;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.02);
    transition: all 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.metric-icon {
    font-size: 2.2rem;
    background: rgba(13, 148, 136, 0.08);
    padding: 10px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
}

.metric-info {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
}

.metric-label {
    font-size: 0.88rem;
    opacity: 0.7;
    font-weight: 500;
}

/* Quick Actions Section */
.actions-section {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.02);
}

.actions-section h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.quick-actions .btn {
    text-decoration: none;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* Settings Page Specific Layouts */
.settings-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 30px;
    align-items: start;
    margin-top: 15px;
}

@media (max-width: 992px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
}

/* Wide Settings Grid for Teacher Management */
.settings-grid-teachers {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 30px;
    align-items: start;
    margin-top: 15px;
}

@media (max-width: 1200px) {
    .settings-grid-teachers {
        grid-template-columns: 1fr;
    }
}

/* Responsive Form Row Grids */
.form-grid-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.form-grid-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

@media (max-width: 600px) {

    .form-grid-row-2,
    .form-grid-row-3 {
        grid-template-columns: 1fr;
        gap: 8px;
        margin-bottom: 8px;
    }
}

/* Expandable profile detail grid styling */
.profile-detail-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    font-size: 0.85rem;
    line-height: 1.6;
}

.profile-detail-grid .full-width {
    grid-column: span 3;
}

@media (max-width: 768px) {
    .profile-detail-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .profile-detail-grid .full-width {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .profile-detail-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .profile-detail-grid .full-width {
        grid-column: span 1;
    }
}

/* Global Data Table Styling */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    margin-top: 10px;
    background: var(--card-bg);
}

.data-table th,
.data-table td {
    border: 1px solid var(--input-border);
    padding: 10px 12px;
    text-align: left;
    vertical-align: middle;
}

.data-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 700;
}

.data-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Delete Button & Badges */
.delete-btn {
    background: #ef4444;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.82rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    display: inline-block;
}

.delete-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid transparent;
}

.badge-info {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
    border-color: rgba(59, 130, 246, 0.3);
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.3);
}

/* Tab contents hide/show helper */
.tab-content {
    display: none;
}

/* Footer style */
footer {
    padding: 20px;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.7;
    border-top: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    margin-top: auto;
}

/* Modal Popup Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    width: 90%;
    max-width: 700px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close-modal-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-color);
    opacity: 0.6;
    cursor: pointer;
    transition: all 0.2s;
}

.close-modal-btn:hover {
    opacity: 1;
}

/* Sidebar toggle button styling */
.sidebar-toggle-btn {
    position: fixed;
    top: 25px;
    left: 255px;
    /* Sits right at the edge of the 280px sidebar, taking margin into account */
    z-index: 1100;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 1px solid var(--sidebar-border);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.8rem;
    padding: 0;
}

.sidebar-toggle-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
}

.sidebar-toggle-btn:focus {
    outline: none;
}

/* Sidebar collapsed state rules */
@media (min-width: 993px) {
    body.sidebar-collapsed .main-layout {
        grid-template-columns: 0px 1fr;
    }

    body.sidebar-collapsed .sidebar {
        transform: translateX(-110%);
        opacity: 0;
        pointer-events: none;
        margin-left: -295px;
        /* offset sidebar width + margin-left */
    }

    body.sidebar-collapsed .sidebar-toggle-btn {
        left: 20px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    }
}

@media (max-width: 992px) {
    .sidebar-toggle-btn {
        display: none !important;
    }
}