/* ── Sidebar Layout ──────────────────────────────────────── */
:root {
    --sidebar-w: 240px;
    --primary: #22c55e;
    --primary-dark: #16a34a;
    --primary-glow: rgba(34, 197, 94, 0.2);
    --bg: #0f1923;
    --bg-surface: #162131;
    --bg-card: rgba(255, 255, 255, 0.04);
    --border: rgba(255, 255, 255, 0.08);
    --text: #e2e8f0;
    --text-muted: #64748b;
    --red: #ef4444;
    --blue: #3b82f6;
    --yellow: #f59e0b;
    --radius: 16px;
    --radius-sm: 8px;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&display=swap');

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse 80% 80% at 50% -20%, rgba(34, 197, 94, 0.1), transparent);
    pointer-events: none;
    z-index: 0;
}

/* SIDEBAR */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-w);
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 200;
    transition: transform 0.3s ease;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 800;
    font-size: 1rem;
    color: var(--primary);
}

.sidebar-logo .logo-icon {
    font-size: 1.5rem;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.sidebar-footer {
    padding: 12px 10px;
    border-top: 1px solid var(--border);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    cursor: pointer;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
}

.nav-item.active {
    background: var(--primary-glow);
    color: var(--primary);
    font-weight: 600;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--red);
}

/* MAIN CONTENT */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 28px;
    background: rgba(22, 33, 49, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar h2 {
    font-size: 1.1rem;
    font-weight: 700;
}

.topbar .user-info {
    color: var(--text-muted);
    font-size: 13px;
}

.topbar .user-info strong {
    color: var(--text);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: none;
}

.page-body {
    padding: 28px;
}

/* GLASS CARD */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
}

.page-header {
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 1.5rem;
}

.page-header p {
    color: var(--text-muted);
    margin-top: 4px;
    font-size: 14px;
}

/* BUTTONS */
button,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 0 16px var(--primary-glow);
}

button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

.btn-red {
    background: var(--red);
    box-shadow: none;
}

.btn-red:hover {
    background: #dc2626;
}

.btn-blue {
    background: var(--blue);
    box-shadow: none;
}

.btn-blue:hover {
    background: #2563eb;
}

/* FORM ELEMENTS */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
textarea,
select {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 11px 14px;
    color: var(--text);
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

select option {
    background: var(--bg-surface);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ALERTS */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--primary);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--red);
}

/* STAT CARDS */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
}

.stat-card .label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-top: 4px;
}

/* DASHBOARD FEATURE CARDS */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: border-color 0.2s, transform 0.2s;
    cursor: pointer;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.feature-card .icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.feature-card h3 {
    margin-bottom: 6px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 16px;
}

/* AUTH PAGE (login/register – no sidebar) */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 24px;
}

body.auth-page {
    display: block;
}

body.auth-page::before {
    display: block;
}

.auth-card {
    background: var(--bg-card);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
}

.auth-card .logo-area {
    text-align: center;
    margin-bottom: 32px;
}

.auth-card .logo-area .logo-icon {
    font-size: 3rem;
}

.auth-card .logo-area h1 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-top: 8px;
}

.auth-card .logo-area p {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 4px;
}

/* TABLE */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 12px 14px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* PROGRESS BAR */
.progress-wrap {
    background: rgba(255, 255, 255, 0.06);
    border-radius: 99px;
    height: 8px;
}

.progress-fill {
    height: 8px;
    border-radius: 99px;
    background: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
    transition: width 0.4s ease;
}

/* SUBJECTS ACCORDION */
.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-bottom: 6px;
    transition: background 0.15s;
    user-select: none;
}

.accordion-header:hover {
    background: rgba(255, 255, 255, 0.07);
}

.accordion-header h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.accordion-header .acc-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.accordion-body {
    display: none;
    margin-bottom: 10px;
}

.accordion-body.open {
    display: block;
}

.subject-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

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

.subject-item input[type="checkbox"] {
    width: 17px;
    height: 17px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* POMODORO */
.timer-modes {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    box-shadow: none;
    font-size: 13px;
    padding: 8px 16px;
}

.mode-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 0 16px var(--primary-glow);
}

.timer-display {
    font-size: 72px;
    font-weight: 800;
    text-align: center;
    color: var(--primary);
    letter-spacing: -4px;
    text-shadow: 0 0 30px var(--primary-glow);
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
}

/* PLANNER TABLE */
.planner-table {
    width: 100%;
    border-collapse: collapse;
}

.planner-table th,
.planner-table td {
    border: 1px solid var(--border);
    padding: 10px;
    text-align: center;
}

.planner-table th {
    background: rgba(34, 197, 94, 0.12);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}

.planner-table textarea {
    background: transparent;
    border: none;
    color: var(--text);
    resize: none;
    font-family: inherit;
    font-size: 13px;
}

.planner-table textarea:focus {
    box-shadow: none;
    border: none;
}

/* CHART */
.chart-container {
    position: relative;
    height: 360px;
    margin-top: 24px;
}

/* EXAM */
.question-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
}

.question-card .q-num {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.question-card .q-text {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 12px;
}

.question-card .option {
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 4px;
    background: rgba(255, 255, 255, 0.03);
}

/* Links */
a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    opacity: 0.8;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

/* Mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 190;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }
}

@media print {

    .sidebar,
    .topbar,
    .no-print {
        display: none !important;
    }

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

    body {
        background: white;
        color: black;
    }

    .glass-card {
        box-shadow: none;
        border: 1px solid #ccc;
        background: white;
    }
}