/* admin/css/admin.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #0EA5E9;
    --primary-hover: #0369A1;
    --secondary: #312E81;
    --accent-orange: #EF2B24;
    --success: #16A34A;
    --warning: #F59E0B;
    --danger: #DC2626;
    --info: #0EA5E9;
    
    /* Light Theme (Default) */
    --bg-main: #F4FAFF;
    --bg-card: #ffffff;
    --bg-cream: #F4FAFF;
    --bg-sidebar: #1E1B4B;
    --text-main: #172033;
    --text-dark: #172033;
    --text-muted: #526176;
    --text-sidebar: #EAF6FF;
    --border-color: #D9E8F6;
    --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.08);
    --shadow-3d: 0 18px 34px rgba(14, 51, 90, 0.10), 0 2px 0 rgba(255,255,255,0.85) inset;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --bg-main: #121214;
    --bg-card: #1d1d21;
    --bg-sidebar: #0d0d0e;
    --text-main: #f1ede9;
    --text-muted: #a3958f;
    --text-sidebar: #d4cdc5;
    --border-color: #2e2c35;
    --shadow-sm: 0 4px 6px rgba(0,0,0,0.3);
    --shadow-md: 0 10px 20px rgba(0,0,0,0.4);
}

/* ═══════════════════════════════════════════════════════════════
   UNIFIED REUSABLE ENTERPRISE SLIDE-OVER DRAWER COMPONENT
   Requirements:
   - Drawer background: Solid White (#FFFFFF)
   - Backdrop: rgba(0, 0, 0, 0.45) with blur(4px)
   - Width: 520px (Desktop), 100% (Tablet & Mobile)
   - Animation: 250ms cubic-bezier(0.25, 0.8, 0.25, 1)
   - Lock body scrolling when open (.drawer-open)
   - ESC & Outside click handlers in JS
   ═══════════════════════════════════════════════════════════════ */

body.drawer-open,
body.modal-open {
    overflow: hidden !important;
}

/* Drawer Backdrop Overlay */
.erp-drawer-backdrop,
#drawerOverlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: rgba(0, 0, 0, 0.45) !important;
    -webkit-backdrop-filter: blur(4px) !important;
    backdrop-filter: blur(4px) !important;
    z-index: 1040 !important;
    opacity: 0;
    visibility: hidden;
    transition: opacity 250ms ease-in-out, visibility 250ms ease-in-out;
}

.erp-drawer-backdrop.show,
.erp-drawer-backdrop.active,
.erp-drawer-backdrop.open,
#drawerOverlay.show,
#drawerOverlay.active {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

/* Slide-over Drawer Panel */
.erp-drawer,
.slide-drawer {
    position: fixed !important;
    top: 0 !important;
    right: 0 !important;
    width: 520px !important;
    max-width: 100% !important;
    height: 100vh !important;
    background: #FFFFFF !important; /* Solid White - No Transparency */
    color: #2b221e !important;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.25) !important;
    z-index: 1050 !important;
    transform: translateX(100%) !important;
    transition: transform 250ms cubic-bezier(0.25, 0.8, 0.25, 1), opacity 200ms ease !important;
    overflow-y: auto !important;
    display: flex !important;
    flex-direction: column !important;
    padding: 30px !important;
    pointer-events: none;
    opacity: 0;
}

.erp-drawer.show,
.erp-drawer.active,
.erp-drawer.open,
.slide-drawer.show,
.slide-drawer.active,
.slide-drawer.open {
    transform: translateX(0) !important;
    pointer-events: auto !important;
    opacity: 1 !important;
}

.fee-card-preview-drawer {
    width: min(820px, calc(100vw - 24px)) !important;
    max-width: calc(100vw - 24px) !important;
    padding: 0 !important;
}

.fee-card-preview-body {
    min-height: 0;
    overflow-y: auto;
    padding-bottom: 120px !important;
}

.fee-card-preview-drawer .admin-table {
    min-width: 0 !important;
}

@media print {
    body.drawer-open * {
        visibility: hidden;
    }

    body.drawer-open #previewCardDrawer,
    body.drawer-open #previewCardDrawer * {
        visibility: visible;
    }

    body.drawer-open #previewCardDrawer {
        position: absolute !important;
        inset: 0 auto auto 0 !important;
        width: 100% !important;
        height: auto !important;
        transform: none !important;
        box-shadow: none !important;
        overflow: visible !important;
    }

    body.drawer-open #previewCardDrawer .erp-drawer-header,
    body.drawer-open #previewCardDrawer .no-print {
        display: none !important;
    }

    body.drawer-open #previewCardDrawer .fee-card-preview-body {
        overflow: visible !important;
        padding: 0 !important;
    }
}

/* Modal Popup Centered Overlay Component */
.erp-modal-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: rgba(0, 0, 0, 0.45) !important;
    -webkit-backdrop-filter: blur(4px) !important;
    backdrop-filter: blur(4px) !important;
    z-index: 1060 !important;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 250ms ease-in-out;
}

.erp-modal-overlay.show,
.erp-modal-overlay.active {
    display: flex !important;
    opacity: 1 !important;
}

.erp-modal-content {
    background: #FFFFFF !important; /* Solid White */
    color: #2b221e !important;
    border-radius: 12px !important;
    padding: 30px !important;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25) !important;
    width: 480px;
    max-width: 92%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid #e6dfd5;
}

/* Responsive Rules for Tablet and Mobile */
@media (max-width: 768px) {
    .erp-drawer,
    .slide-drawer {
        width: 100% !important;
        padding: 20px !important;
    }
}


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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

.wk-page-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 3000;
    width: 100%;
    height: 4px;
    pointer-events: none;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left;
    background: linear-gradient(90deg, #16A34A, #0EA5E9, #F59E0B, #EF2B24);
    box-shadow: 0 0 18px rgba(14, 165, 233, 0.42);
}

.wk-page-progress.is-active {
    opacity: 1;
    animation: wkProgressRun 1.1s ease-in-out infinite;
}

html.wk-busy {
    cursor: progress;
}

@keyframes wkProgressRun {
    0% { transform: scaleX(0); opacity: 0.55; }
    45% { transform: scaleX(0.72); opacity: 1; }
    100% { transform: scaleX(1); opacity: 0.82; }
}

.wk-motion-ready {
    animation: wkCardArrive 420ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
    animation-delay: var(--wk-motion-delay, 0ms);
}

@keyframes wkCardArrive {
    from { opacity: 0; transform: translateY(12px) scale(0.985); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

button,
.btn,
input[type="submit"],
input[type="button"],
summary,
.menu-item a,
.teacher-bottom-nav a {
    -webkit-tap-highlight-color: transparent;
}

button,
.btn,
input[type="submit"],
input[type="button"] {
    position: relative;
    transition: transform 160ms ease, box-shadow 160ms ease, filter 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

button:hover,
.btn:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
.menu-item a:hover,
summary:hover {
    filter: saturate(1.06);
}

.wk-pressed,
button:active,
.btn:active,
input[type="submit"]:active,
input[type="button"]:active {
    transform: translateY(1px) scale(0.985) !important;
}

.wk-loading {
    pointer-events: none !important;
    opacity: 0.86;
}

.wk-spinner {
    width: 1em;
    height: 1em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 999px;
    display: inline-block;
    margin-right: 8px;
    vertical-align: -2px;
    animation: wkSpin 720ms linear infinite;
}

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

.wk-form-submitting {
    position: relative;
}

.wk-form-submitting::after {
    content: "";
    position: absolute;
    inset: -8px;
    z-index: 5;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.12), transparent);
    animation: wkFormGlow 1.2s ease-in-out infinite;
}

@keyframes wkFormGlow {
    0%, 100% { opacity: 0.25; transform: translateX(-8px); }
    50% { opacity: 0.9; transform: translateX(8px); }
}

.wk-toast-stack {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 3200;
    display: grid;
    gap: 10px;
    width: min(360px, calc(100vw - 28px));
}

.wk-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 14px;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--border-color);
    box-shadow: 0 18px 40px rgba(14, 51, 90, 0.18);
    transform: translateY(12px) scale(0.98);
    opacity: 0;
    transition: transform 220ms ease, opacity 220ms ease;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    font-weight: 700;
}

.wk-toast.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.wk-toast-dot {
    width: 10px;
    height: 10px;
    flex: 0 0 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 6px rgba(14, 165, 233, 0.12);
}

.wk-toast-success .wk-toast-dot { background: var(--success); box-shadow: 0 0 0 6px rgba(22, 163, 74, 0.12); }
.wk-toast-error .wk-toast-dot { background: var(--danger); box-shadow: 0 0 0 6px rgba(220, 38, 38, 0.12); }

.wk-attention-pop {
    animation: wkAttentionPop 360ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes wkAttentionPop {
    from { opacity: 0; transform: translateY(-8px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

input:focus,
select:focus,
textarea:focus,
.form-control:focus {
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.13) !important;
}

.wk-media-picker {
    margin-top: 12px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: rgba(244, 250, 255, 0.72);
    padding: 12px;
}

.wk-media-picker-head,
.wk-media-picker-selected {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.wk-media-picker-head strong {
    display: block;
    color: var(--text-main);
    font-size: 0.92rem;
}

.wk-media-picker-note {
    display: block;
    margin-top: 2px;
    color: var(--text-muted);
    font-size: 0.76rem;
    font-weight: 600;
}

.wk-media-picker-selected {
    justify-content: flex-start;
    margin-top: 12px;
    padding: 10px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid rgba(14, 165, 233, 0.18);
}

.wk-media-picked-thumb,
.wk-media-option-preview {
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: rgba(14, 165, 233, 0.08);
}

.wk-media-picked-thumb {
    width: 58px;
    height: 44px;
    border-radius: 10px;
}

.wk-media-picked-thumb img,
.wk-media-option-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.wk-media-picked-label {
    display: block;
    max-width: min(480px, 58vw);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.wk-media-picked-path {
    display: block;
    color: var(--text-muted);
    font-size: 0.74rem;
    word-break: break-all;
}

.wk-media-picker-clear {
    margin-left: auto;
    width: 36px;
    height: 36px;
    padding: 0 !important;
}

.wk-media-picker-panel {
    margin-top: 12px;
    display: grid;
    gap: 12px;
    max-height: min(42vh, 360px);
    overflow: hidden;
}

.wk-media-picker-panel[hidden] {
    display: none;
}

.wk-media-picker-panelbar {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 2;
    background: rgba(244, 250, 255, 0.96);
    padding-bottom: 2px;
}

.wk-media-picker-close {
    width: 42px;
    height: 42px;
    padding: 0 !important;
}

.wk-media-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(138px, 1fr));
    gap: 10px;
    max-height: calc(min(42vh, 360px) - 58px);
    overflow: auto;
    padding: 2px;
}

.wk-media-option {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: #fff;
    padding: 8px;
    cursor: pointer;
    text-align: left;
    color: var(--text-main);
}

.wk-media-option:hover,
.wk-media-option.is-selected {
    border-color: var(--primary);
    box-shadow: 0 10px 24px rgba(14, 165, 233, 0.14);
    transform: translateY(-2px);
}

.wk-media-option.is-selected {
    background: rgba(14, 165, 233, 0.08);
}

.wk-media-option-preview {
    width: 100%;
    aspect-ratio: 16 / 10;
    border-radius: 9px;
    margin-bottom: 8px;
}

.wk-media-option-name,
.wk-media-option-meta {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.wk-media-option-name {
    font-weight: 800;
    font-size: 0.78rem;
}

.wk-media-option-meta,
.wk-media-picker-empty {
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 650;
}

#scan-overlay {
    animation: wkScanFrame 1.15s ease-in-out infinite;
}

#scan-overlay::before,
#scan-overlay::after {
    content: "";
    position: absolute;
    width: 42px;
    height: 42px;
    border-color: #16A34A;
    border-style: solid;
    filter: drop-shadow(0 0 10px rgba(22, 163, 74, 0.55));
}

#scan-overlay::before {
    top: -2px;
    left: -2px;
    border-width: 4px 0 0 4px;
    border-radius: 12px 0 0 0;
}

#scan-overlay::after {
    right: -2px;
    bottom: -2px;
    border-width: 0 4px 4px 0;
    border-radius: 0 0 12px 0;
}

@keyframes wkScanFrame {
    0%, 100% { box-shadow: inset 0 0 0 0 rgba(22, 163, 74, 0.05); }
    50% { box-shadow: inset 0 0 0 999px rgba(22, 163, 74, 0.055); }
}

.admin-table tbody tr,
.widget-card,
.chart-card,
.content-body > div[style*="background"],
.content-body > section[style*="background"] {
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.admin-table tbody tr:hover,
.widget-card:hover,
.chart-card:hover,
.content-body > div[style*="background"]:hover,
.content-body > section[style*="background"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(14, 51, 90, 0.10);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
    }
}

a {
    text-decoration: none;
    color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.btn:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.34);
    outline-offset: 3px;
}

/* --- Layout Structure --- */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    transition: transform 0.3s ease;
    border-right: 1px solid var(--border-color);
}
.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(20, 16, 14, 0.48);
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}
.sidebar-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}
.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.sidebar-logo {
    font-size: 1.8rem;
}
.sidebar-brand {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}
.sidebar-menu {
    list-style: none;
    padding: 14px 12px 112px;
    overflow-y: auto;
    flex-grow: 1;
}
.grouped-sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.menu-group {
    list-style: none;
}
.menu-group details {
    border-radius: 10px;
    overflow: hidden;
}
.menu-group details[open] {
    background: rgba(255, 255, 255, 0.035);
}
.menu-group summary {
    min-height: 44px;
    padding: 10px 12px;
    display: grid;
    grid-template-columns: 20px 1fr 14px;
    align-items: center;
    gap: 12px;
    color: var(--text-sidebar);
    cursor: pointer;
    opacity: 0.82;
    font-weight: 700;
    font-size: 0.86rem;
    text-transform: uppercase;
    letter-spacing: 0.055em;
    user-select: none;
}
.menu-group summary::-webkit-details-marker {
    display: none;
}
.menu-group summary:hover {
    background: rgba(14, 165, 233, 0.10);
    color: var(--primary);
    opacity: 1;
}
.group-chevron {
    font-size: 0.72rem;
    transition: transform 0.2s ease;
}
.menu-group details[open] .group-chevron {
    transform: rotate(180deg);
}
.menu-group details.active-group > summary,
.menu-group details[open].active-group > summary {
    background: rgba(14, 165, 233, 0.12);
    color: var(--primary);
    border-left: 3px solid var(--primary);
    font-weight: 700;
}
.menu-group ul {
    list-style: none;
    padding: 4px 0 8px;
}
.menu-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px 10px 38px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    color: var(--text-sidebar);
    opacity: 0.75;
    border-radius: 8px;
}
.menu-item a:hover, .menu-item.active a {
    background-color: rgba(14, 165, 233, 0.12);
    color: var(--primary);
    opacity: 1;
    border-left: 3px solid var(--primary);
    padding-left: 35px;
}
.grouped-sidebar-menu > .menu-item > a {
    padding-left: 12px;
    font-weight: 700;
}
.grouped-sidebar-menu > .menu-item.active > a,
.grouped-sidebar-menu > .menu-item > a:hover {
    padding-left: 9px;
}

.main-content {
    margin-left: 260px;
    width: calc(100% - 260px);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s;
}

/* --- Top Header Bar --- */
.topbar {
    height: 70px;
    background-color: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 99;
}
.topbar-left {
    display: flex;
    align-items: center;
    gap: 15px;
}
.toggle-sidebar-btn {
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-main);
    display: none;
}
.topbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}
.profile-dropdown {
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}
.profile-dropdown img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    object-fit: cover;
}
.theme-toggle {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-main);
}

/* --- Content Wrapper --- */
.content-body {
    padding: 30px;
    flex-grow: 1;
    background:
        radial-gradient(circle at 12% 8%, rgba(14, 165, 233, 0.12), transparent 28%),
        radial-gradient(circle at 95% 18%, rgba(69, 123, 157, 0.10), transparent 24%),
        linear-gradient(180deg, rgba(255,255,255,0.28), transparent 260px);
}
.page-title-box {
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}
.page-title {
    font-size: 1.8rem;
    font-weight: 700;
}

/* --- Dashboard Stat Widgets --- */
.widgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 24px;
    margin-bottom: 35px;
}
.widget-card {
    background-color: var(--bg-card);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.widget-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.widget-value {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.2;
}
.widget-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 5px;
    letter-spacing: 0.05em;
}
.widget-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    background-color: rgba(14, 165, 233, 0.15);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* --- Analytics Charts Grid --- */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    margin-bottom: 35px;
}
@media (max-width: 992px) {
    .charts-grid { grid-template-columns: 1fr; }
}
.chart-card {
    background-color: var(--bg-card);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}
.chart-header {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

/* --- Form Fields & Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}
.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(14, 51, 90, 0.12);
}
.btn-primary { background-color: var(--primary); color: #fff; }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-secondary { background-color: transparent; border-color: var(--border-color); color: var(--text-main); }
.btn-secondary:hover { background-color: var(--bg-main); }
.btn-danger { background-color: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }

.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}
.form-control, select, select.form-control {
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid #CBD5E1;
    background-color: #FFFFFF;
    color: #0F172A;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    outline: none;
    height: 44px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
}

select, select.form-control {
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: right 14px center !important;
    background-size: 16px 16px !important;
    padding-right: 38px !important;
    cursor: pointer !important;
}

select:hover, select.form-control:hover, .form-control:hover {
    border-color: #94A3B8;
    background-color: #F8FAFC;
}

.form-control:focus, select:focus, select.form-control:focus {
    border-color: var(--primary, #312E81) !important;
    background-color: #FFFFFF !important;
    box-shadow: 0 0 0 4px rgba(49, 46, 129, 0.12) !important;
}

/* --- Table Styles --- */
.table-responsive {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    margin-bottom: 20px;
    -webkit-overflow-scrolling: touch;
}
.admin-table {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}
.admin-table th, .admin-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    font-size: 0.9rem;
}
.admin-table th {
    background-color: var(--bg-main);
    font-weight: 600;
    color: var(--text-muted);
}
.admin-table tbody tr:hover {
    background-color: rgba(14, 165, 233, 0.03);
    box-shadow: inset 3px 0 0 var(--primary);
}
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}
.badge-success { background-color: rgba(46, 196, 182, 0.15); color: var(--success); }
.badge-warning { background-color: rgba(255, 159, 28, 0.15); color: var(--warning); }
.badge-danger { background-color: rgba(231, 29, 54, 0.15); color: var(--danger); }
.badge-info { background-color: rgba(69, 123, 157, 0.15); color: var(--info); }

/* --- Pagination & Filters --- */
.table-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}
.pagination {
    display: flex;
    gap: 5px;
    list-style: none;
}
.pagination-link {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}
.pagination-link.active, .pagination-link:hover {
    background-color: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* --- Drag & Drop file upload area --- */
.upload-drop-zone {
    border: 2px dashed var(--primary);
    padding: 40px;
    text-align: center;
    border-radius: 8px;
    background-color: rgba(14, 165, 233, 0.05);
    cursor: pointer;
    transition: background-color 0.2s;
    margin-bottom: 20px;
}
.upload-drop-zone:hover {
    background-color: rgba(14, 165, 233, 0.1);
}

/* --- Action Dropdown --- */
.action-btn-group {
    display: flex;
    gap: 10px;
}

/* --- Login Form Page --- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    background-color: var(--bg-main);
}
.login-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}

.content-body > div[style*="background-color: var(--bg-card)"],
.content-body > section[style*="background-color: var(--bg-card)"] {
    box-shadow: var(--shadow-3d) !important;
}

/* --- Mobile Responsive Rules --- */
@media (max-width: 768px) {
    body.sidebar-open {
        overflow: hidden;
    }
    .toggle-sidebar-btn { display: block; }
    .sidebar {
        transform: translateX(-100%);
        width: min(86vw, 300px);
        z-index: 120;
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
        width: 100%;
    }
    .topbar {
        height: auto;
        min-height: 64px;
        padding: 10px 14px;
        gap: 10px;
    }
    .topbar-left,
    .topbar-right {
        gap: 10px;
    }
    .topbar-left .btn {
        padding: 8px 10px !important;
        font-size: 0 !important;
        line-height: 0 !important;
        width: 42px !important;
        height: 42px !important;
        overflow: hidden;
        color: transparent !important;
        flex: 0 0 42px !important;
    }
    .topbar-left .btn i {
        font-size: 1.15rem !important;
        margin: 0;
        color: var(--text-main) !important;
    }
    .profile-dropdown > div {
        display: none;
    }
    .content-body { padding: 16px; }
    .page-title-box {
        align-items: stretch;
        margin-bottom: 20px;
    }
    .page-title {
        font-size: 1.35rem;
        line-height: 1.2;
    }
    .page-title-box p {
        font-size: 0.92rem !important;
        line-height: 1.45;
    }
    .page-title-box > div:last-child,
    .page-title-box > a,
    .page-title-box .btn {
        width: 100%;
    }
    .page-title-box > div:last-child {
        flex-wrap: wrap;
    }
    .page-title-box > div:last-child .btn {
        flex: 1 1 160px;
    }
    .widgets-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .widget-card,
    .chart-card {
        border-radius: 8px;
        padding: 18px;
    }
    .btn {
        min-height: 40px;
        padding: 10px 14px;
        white-space: normal;
        text-align: center;
    }
    .action-btn-group {
        flex-wrap: wrap;
    }
    .form-control {
        min-height: 42px;
        font-size: 16px;
    }
    .login-wrapper {
        align-items: flex-start;
        padding: 24px 14px;
    }
    .login-card {
        padding: 26px 18px;
        border-radius: 8px;
        max-width: none;
    }
    .login-card .btn {
        width: 100%;
    }
    form[style*="grid-template-columns"],
    div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
    div[style*="grid-template-columns"] > * {
        min-width: 0;
    }
    div[style*="max-width: 800px"],
    div[style*="max-width: 600px"],
    div[style*="max-width: 500px"] {
        max-width: none !important;
        padding: 18px !important;
        border-radius: 10px !important;
    }
    .content-body h3 {
        font-size: 1.12rem !important;
    }
    form[style*="display: flex"] {
        flex-wrap: wrap;
    }
    form[style*="display: flex"] > * {
        flex: 1 1 100%;
    }
    .mapping-row {
        grid-template-columns: 1fr !important;
    }
    #subjects-checkbox-container {
        max-height: none !important;
    }
    .table-responsive {
        overflow: visible;
    }
    .admin-table {
        min-width: 0;
        border: none;
        background: transparent;
    }
    .blog-editor-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ═══════════════════════════════════════════════════════════════
   TASK 19 & 20: SYSTEMIC RESPONSIVE GRID UTILITIES & STICKY ACTIONS
   ═══════════════════════════════════════════════════════════════ */

/* Task 19: Sticky Actions & Table Scroll Hint */
.table-responsive {
    position: relative;
}

.table-responsive-hint::before {
    content: "← Scroll table horizontally for details & actions →";
    display: block;
    font-size: 0.76rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-style: italic;
}

.table-responsive .admin-table th.sticky-actions,
.table-responsive .admin-table td.sticky-actions {
    position: sticky;
    right: 0;
    background-color: var(--bg-card);
    box-shadow: -3px 0 6px rgba(0, 0, 0, 0.08);
    z-index: 2;
}

.table-responsive .admin-table th.sticky-actions {
    background-color: var(--bg-main);
}

/* Task 20: Responsive Grid Utility Classes */
.grid-2col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.grid-4col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.grid-1-2col {
    display: grid;
    grid-template-columns: 1fr 2fr;
}

.grid-2-1col {
    display: grid;
    grid-template-columns: 2fr 1fr;
}

@media (max-width: 768px) {
    .grid-2col,
    .grid-3col,
    .grid-4col,
    .grid-1-2col,
    .grid-2-1col {
        grid-template-columns: 1fr !important;
    }
}

/* --- WonderKidz App-like Admin / Teacher Portal Polish --- */
body {
    -webkit-font-smoothing: antialiased;
}

.main-content {
    min-width: 0;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 80;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(244, 250, 255, 0.92);
    border-bottom: 1px solid rgba(217, 232, 246, 0.9);
}

.content-body {
    max-width: 1440px;
    width: 100%;
}

.widget-card,
.chart-card,
.login-card,
.content-body > div[style*="background"],
.content-body > section[style*="background"] {
    border-radius: 16px !important;
}

.form-control,
select,
textarea,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="tel"] {
    max-width: 100%;
}

@media (max-width: 900px) {
    body {
        display: block;
        background:
            linear-gradient(180deg, #F7FBFF 0%, #ECF8F0 100%);
    }

    .sidebar {
        width: min(88vw, 320px);
        border-radius: 0 22px 22px 0;
        box-shadow: 24px 0 60px rgba(14, 51, 90, 0.24);
    }

    .sidebar-header {
        padding: 18px;
    }

    .sidebar-menu {
        padding-bottom: 118px;
    }

    .main-content {
        width: 100%;
        margin-left: 0;
        min-height: 100dvh;
    }

    .content-body {
        padding: 14px;
        padding-bottom: max(28px, env(safe-area-inset-bottom));
    }

    .topbar {
        min-height: 62px;
        border-radius: 0 0 18px 18px;
        box-shadow: 0 12px 26px rgba(14, 51, 90, 0.08);
    }

    .page-title-box {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 12px !important;
        padding: 2px 0;
    }

    .page-title {
        font-size: 1.42rem !important;
    }

    .btn {
        border-radius: 12px !important;
        min-height: 42px;
    }

    .table-responsive {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        border-radius: 14px;
        margin-bottom: 16px;
        width: 100%;
    }

    .admin-table {
        min-width: 600px !important;
        width: 100%;
        display: table !important;
        border-collapse: collapse;
    }

    .admin-table thead {
        display: table-header-group !important;
    }

    .admin-table tbody {
        display: table-row-group !important;
    }

    .admin-table tr {
        display: table-row !important;
        margin-bottom: 0;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }

    .admin-table th,
    .admin-table td {
        display: table-cell !important;
        padding: 12px 10px !important;
        font-size: 0.86rem;
        white-space: nowrap;
    }

    .admin-table td strong,
    .admin-table td small,
    .admin-table td span {
        white-space: normal;
    }

    .action-btn-group {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
        gap: 8px;
        width: 100%;
    }

    .action-btn-group .btn {
        width: 100%;
    }

    .login-wrapper {
        min-height: 100dvh;
        padding: 18px;
        align-items: center;
    }

    .login-card {
        border-radius: 22px !important;
        box-shadow: 0 18px 45px rgba(14, 51, 90, 0.12);
    }
}

.teacher-bottom-nav {
    display: none;
}

@media (max-width: 900px) {
    body:has(.teacher-bottom-nav) .content-body {
        padding-bottom: 96px;
    }

    .teacher-bottom-nav {
        position: fixed;
        left: 10px;
        right: 10px;
        bottom: 10px;
        z-index: 1300;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 5px;
        padding: 7px;
        border: 1px solid rgba(14, 165, 233, 0.18);
        border-radius: 18px;
        background: rgba(255, 255, 255, 0.96);
        box-shadow: 0 16px 42px rgba(14, 51, 90, 0.2);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .teacher-bottom-nav a {
        min-height: 52px;
        border-radius: 14px;
        color: var(--text-muted);
        text-decoration: none;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        font-size: 0.72rem;
        font-weight: 800;
    }

    .teacher-bottom-nav a i {
        font-size: 1.15rem;
    }

    .teacher-bottom-nav a.active {
        background: rgba(255, 244, 184, 0.95);
        color: var(--primary);
        box-shadow: inset 0 0 0 1px rgba(14, 165, 233, 0.14);
    }

    .teacher-bottom-nav a.scan {
        background: var(--primary);
        color: #fff;
        transform: translateY(-8px);
        box-shadow: 0 10px 22px rgba(14, 165, 233, 0.32);
    }
}