:root {
    --ufh-navy: #112A43;
    --ufh-navy-light: #1B3A5C;
    --ufh-sky: #8ED1FC;
    --ufh-gold: #FFC520;
    --ufh-white: #FFFFFF;
    --ufh-grey: #F5F7FA;
    --ufh-text: #2C3E50;
    --shadow: 0 2px 10px rgba(17, 42, 67, 0.08);
    --shadow-hover: 0 6px 18px rgba(17, 42, 67, 0.15);
    --bg-page: #F5F7FA;
    --bg-card: #FFFFFF;
    --text-main: #2C3E50;
    --text-muted: #7A8699;
    --border-col: #ECEFF3;
    --input-border: #E0E6ED;
    --sidebar-bg: linear-gradient(180deg, #112A43 0%, #1B3A5C 100%);
    --table-head: linear-gradient(135deg, #8ED1FC 0%, #b3e2ff 100%);
    --table-hover: #F0F8FF;
}

html[data-theme="dark"] {
    --bg-page: #0E1620;
    --bg-card: #16212E;
    --text-main: #E4E9F0;
    --text-muted: #93A0B3;
    --border-col: #253141;
    --input-border: #2E3B4C;
    --sidebar-bg: linear-gradient(180deg, #0A1622 0%, #112A43 100%);
    --table-head: linear-gradient(135deg, #1B3A5C 0%, #234868 100%);
    --table-hover: #1B2836;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', Segoe UI, Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* ---------- LAYOUT SHELL ---------- */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ---------- SIDEBAR ---------- */
.sidebar {
    width: 240px;
    flex-shrink: 0;
    background: var(--sidebar-bg);
    color: var(--ufh-white);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: width 0.2s ease;
    z-index: 200;
}

    .sidebar.collapsed {
        width: 70px;
    }

.sidebar-links {
    flex: 1;
    padding: 12px 10px;
}

    .sidebar-links a {
        display: flex;
        align-items: center;
        gap: 12px;
        color: rgba(255,255,255,0.85);
        text-decoration: none;
        font-size: 14px;
        font-weight: 500;
        padding: 10px 12px;
        border-radius: 8px;
        margin-bottom: 3px;
        white-space: nowrap;
        overflow: hidden;
        border-left: 3px solid transparent;
        transition: all 0.15s ease;
    }

        .sidebar-links a i {
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .sidebar-links a:hover {
            background: rgba(255,255,255,0.08);
            color: var(--ufh-white);
        }

        /* Active nav link: strong gold highlight, bold text, left accent bar */
        .sidebar-links a.active {
            background: var(--ufh-gold);
            color: var(--ufh-navy) !important;
            font-weight: 700;
            border-left: 3px solid var(--ufh-white);
            box-shadow: 0 2px 8px rgba(0,0,0,0.25);
        }

            .sidebar-links a.active i {
                color: var(--ufh-navy);
            }

            .sidebar-links a.active:hover {
                background: var(--ufh-gold);
            }

.sidebar.collapsed .sidebar-links a span {
    display: none;
}

.sidebar-section-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: rgba(255,255,255,0.4);
    padding: 14px 12px 6px 12px;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-section-label {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    padding: 14px;
    font-size: 16px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

    .sidebar-toggle:hover {
        color: var(--ufh-white);
    }

/* ---------- MAIN AREA ---------- */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.top-header {
    background: linear-gradient(135deg, var(--ufh-navy) 0%, var(--ufh-navy-light) 100%);
    border-bottom: none;
    padding: 12px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.top-header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

    .top-header-brand img {
        height: 32px;
        width: auto;
    }

    .top-header-brand span {
        font-size: 19px;
        font-weight: 700;
        color: var(--ufh-gold);
        letter-spacing: 0.3px;
        white-space: nowrap;
    }

.top-header-actions {
    display: flex;
    align-items: center;
    gap: 18px;
}

    .top-header-actions a {
        color: var(--ufh-white);
        text-decoration: none;
        font-size: 16px;
        display: flex;
        align-items: center;
        gap: 6px;
        position: relative;
    }

    .top-header-actions .username-chip {
        color: #B3D9F5;
        font-size: 13px;
    }

.mobile-toggle {
    display: none;
    background: rgba(255,255,255,0.12);
    color: var(--ufh-white);
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
}

/* ---------- LAYOUT ---------- */
.page-content {
    padding: 30px;
    max-width: 1200px;
    margin: 0 auto;
    min-height: 70vh;
    width: 100%;
}

h1, h2, h3 {
    color: var(--ufh-navy);
    font-weight: 600;
}

html[data-theme="dark"] h1, html[data-theme="dark"] h2, html[data-theme="dark"] h3 {
    color: var(--text-main);
}

h2.page-title, .page-content > h2:first-of-type {
    border-left: 5px solid var(--ufh-gold);
    padding-left: 14px;
    margin-bottom: 20px;
}

/* ---------- TABLES ---------- */
table.grid {
    border-collapse: collapse;
    width: 100%;
    margin-top: 15px;
    background: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

    table.grid th {
        background: var(--table-head);
        color: var(--ufh-navy);
        padding: 13px 15px;
        text-align: left;
        font-weight: 600;
        font-size: 13px;
        text-transform: uppercase;
        letter-spacing: 0.4px;
    }

html[data-theme="dark"] table.grid th {
    color: var(--ufh-white);
}

table.grid td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-col);
    font-size: 14px;
    color: var(--text-main);
}

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

table.grid tr:hover td {
    background-color: var(--table-hover);
}

/* ---------- BUTTONS ---------- */
.btn {
    background-color: var(--ufh-navy);
    color: var(--ufh-white);
    border: none;
    padding: 9px 18px;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    font-family: 'Poppins', sans-serif;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

html[data-theme="dark"] .btn {
    background-color: var(--ufh-sky);
    color: var(--ufh-navy);
}

.btn:hover {
    background-color: var(--ufh-sky);
    color: var(--ufh-navy);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.btn-gold {
    background-color: var(--ufh-gold);
    color: var(--ufh-navy);
}

    .btn-gold:hover {
        background-color: #ffd450;
        color: var(--ufh-navy);
    }

.btn-danger {
    background-color: #c0392b;
    color: var(--ufh-white);
}

    .btn-danger:hover {
        background-color: #e74c3c;
        color: var(--ufh-white);
    }

/* ---------- FORMS ---------- */
.form-box {
    max-width: 520px;
    background: var(--bg-card);
    border: none;
    padding: 28px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

    .form-box label {
        display: block;
        margin-top: 14px;
        margin-bottom: 4px;
        font-weight: 600;
        font-size: 13px;
        color: var(--ufh-navy);
        text-transform: uppercase;
        letter-spacing: 0.3px;
    }

html[data-theme="dark"] .form-box label {
    color: var(--ufh-sky);
}

.form-box input[type=text],
.form-box input[type=email],
.form-box input[type=date],
.form-box input[type=time],
.form-box input[type=password],
.form-box textarea,
.form-box select {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--input-border);
    border-radius: 6px;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    transition: border-color 0.2s ease;
    background: var(--bg-card);
    color: var(--text-main);
}

    .form-box input:focus,
    .form-box textarea:focus,
    .form-box select:focus {
        outline: none;
        border-color: var(--ufh-sky);
    }

.error-text {
    color: #e05a4a;
    font-size: 13px;
    display: block;
    margin-top: 4px;
}

/* ---------- DASHBOARD CARDS ---------- */
.dash-card {
    text-align: center;
    min-width: 190px;
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px 18px;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border-top: 4px solid var(--ufh-sky);
}

    .dash-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
    }

    .dash-card.alert {
        border-top-color: #c0392b;
    }

    .dash-card h3 {
        margin: 0 0 8px 0;
        font-size: 14px;
        text-transform: uppercase;
        letter-spacing: 0.4px;
        color: var(--text-muted);
    }

    .dash-card .value {
        font-size: 34px;
        font-weight: 700;
        color: var(--ufh-navy);
        margin: 6px 0 14px 0;
    }

html[data-theme="dark"] .dash-card .value {
    color: var(--text-main);
}

.dash-card.alert .value {
    color: #e05a4a;
}

.dash-card.earnings {
    border-top-color: var(--ufh-gold);
}

/* ---------- STATUS BADGES ---------- */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-green {
    background: #DFF5E4;
    color: #1B7A3D;
}

.badge-red {
    background: #FBE0DE;
    color: #C0392B;
}

.badge-orange {
    background: #FFF1D6;
    color: #B8760A;
}

/* ---------- NOTIFICATION BELL BADGE ---------- */
.notif-badge {
    display: inline-block;
    background: #c0392b;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    border-radius: 50%;
    padding: 1px 5px;
    position: absolute;
    top: -6px;
    right: -10px;
    min-width: 16px;
    text-align: center;
}

/* ---------- STAR RATINGS ---------- */
.stars {
    color: var(--ufh-gold);
    font-size: 16px;
    letter-spacing: 2px;
}

/* ---------- EMAIL-STYLE CONFIRMATION ---------- */
.email-receipt {
    max-width: 480px;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-top: 10px;
}

.email-receipt-header {
    background: linear-gradient(135deg, var(--ufh-navy) 0%, var(--ufh-navy-light) 100%);
    color: var(--ufh-white);
    padding: 18px 22px;
}

    .email-receipt-header .subject {
        font-size: 15px;
        font-weight: 600;
    }

    .email-receipt-header .meta {
        font-size: 12px;
        color: #B3D9F5;
        margin-top: 4px;
    }

.email-receipt-body {
    padding: 22px;
}

    .email-receipt-body .greeting {
        font-weight: 600;
        color: var(--ufh-navy);
        margin-bottom: 10px;
    }

html[data-theme="dark"] .email-receipt-body .greeting {
    color: var(--text-main);
}

.email-receipt-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-col);
    font-size: 14px;
}

    .email-receipt-row:last-child {
        border-bottom: none;
    }

    .email-receipt-row .label {
        color: var(--text-muted);
    }

    .email-receipt-row .value {
        font-weight: 600;
        color: var(--ufh-navy);
    }

html[data-theme="dark"] .email-receipt-row .value {
    color: var(--text-main);
}

/* ---------- AUTH PAGES (LOGIN / REGISTER) ---------- */
.auth-wrapper {
    display: flex;
    gap: 0;
    max-width: 900px;
    margin: 10px auto;
    background: var(--bg-card);
    border-radius: 14px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.auth-visual {
    flex: 1;
    min-width: 280px;
    background: linear-gradient(160deg, var(--ufh-navy) 0%, var(--ufh-navy-light) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 30px;
    text-align: center;
}

    .auth-visual img {
        max-width: 180px;
        margin-bottom: 20px;
    }

    .auth-visual h3 {
        color: var(--ufh-gold);
        font-size: 18px;
        margin: 0 0 10px 0;
    }

    .auth-visual p {
        color: #B3D9F5;
        font-size: 13px;
        line-height: 1.6;
        margin: 0;
    }

.auth-form-side {
    flex: 1.3;
    min-width: 320px;
    padding: 35px;
}

    .auth-form-side .form-box {
        box-shadow: none;
        padding: 0;
        max-width: none;
    }

@media (max-width: 700px) {
    .auth-wrapper {
        flex-direction: column;
    }

    .auth-visual {
        padding: 30px 20px;
    }
}

/* ---------- BALANCE BANNER (Student) ---------- */
.balance-banner {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--bg-card);
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 24px 30px;
    margin-bottom: 25px;
    border-left: 6px solid #7A8699;
    max-width: 480px;
}

.balance-banner-icon {
    font-size: 34px;
    color: #7A8699;
}

.balance-banner-label {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--text-muted);
    font-weight: 600;
}

.balance-banner-amount {
    font-size: 34px;
    font-weight: 700;
    color: #7A8699;
    margin: 4px 0;
}

.balance-banner-meaning {
    font-size: 13px;
    color: var(--text-muted);
}

.balance-banner.balance-credit {
    border-left-color: #1B7A3D;
}

    .balance-banner.balance-credit .balance-banner-icon, .balance-banner.balance-credit .balance-banner-amount {
        color: #1B7A3D;
    }

.balance-banner.balance-owing {
    border-left-color: #c0392b;
}

    .balance-banner.balance-owing .balance-banner-icon, .balance-banner.balance-owing .balance-banner-amount {
        color: #e05a4a;
    }

.balance-banner.balance-settled {
    border-left-color: #7A8699;
}

/* ---------- SETTINGS PAGE ---------- */
.theme-option {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    border: 2px solid var(--input-border);
    border-radius: 10px;
    cursor: pointer;
    margin-right: 12px;
    margin-bottom: 10px;
    background: var(--bg-card);
    color: var(--text-main);
    transition: all 0.15s ease;
    text-decoration: none;
}

/* ---------- ROLE SELECTOR CARDS ---------- */
.role-select {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.role-card {
    flex: 1;
    min-width: 200px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    cursor: pointer;
    background: var(--bg-card);
    transition: all 0.15s ease;
}

    .role-card input[type=radio] {
        position: absolute;
        opacity: 0;
        width: 0;
        height: 0;
    }

.role-card-icon {
    font-size: 26px;
    color: var(--text-muted);
    width: 40px;
    text-align: center;
    flex-shrink: 0;
    transition: color 0.15s ease;
}

.role-card-text {
    text-transform: none;
}

.role-card-title {
    font-weight: 700;
    color: var(--ufh-navy);
    font-size: 15px;
    text-transform: none;
    letter-spacing: normal;
}

html[data-theme="dark"] .role-card-title {
    color: var(--text-main);
}

.role-card-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
    text-transform: none;
}

.role-card:hover {
    border-color: var(--ufh-sky);
}

.role-card.selected {
    border-color: var(--ufh-gold);
    background: rgba(255, 197, 32, 0.08);
    box-shadow: 0 0 0 3px rgba(255, 197, 32, 0.15);
}

    .role-card.selected .role-card-icon {
        color: var(--ufh-navy);
    }

html[data-theme="dark"] .role-card.selected .role-card-icon {
    color: var(--ufh-gold);
}

    .theme-option.selected {
        border-color: var(--ufh-gold);
        background: rgba(255,197,32,0.08);
    }

    .theme-option i {
        font-size: 18px;
    }

.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-col);
}

    .toggle-row:last-child {
        border-bottom: none;
    }

.toggle-row-label {
    font-weight: 600;
    color: var(--ufh-navy);
    font-size: 14px;
}

html[data-theme="dark"] .toggle-row-label {
    color: var(--text-main);
}

.toggle-row-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ---------- FOOTER ---------- */
.footer {
    background-color: var(--ufh-navy);
    color: var(--ufh-white);
    text-align: center;
    padding: 16px;
    font-size: 13px;
    margin-top: 40px;
}

/* ---------- MOBILE ---------- */
@media (max-width: 900px) {
    .sidebar {
        position: fixed;
        left: -240px;
        height: 100vh;
        box-shadow: 4px 0 20px rgba(0,0,0,0.3);
    }

        .sidebar.mobile-open {
            left: 0;
        }

        .sidebar.collapsed {
            width: 240px;
        }

    .mobile-toggle {
        display: inline-block;
    }

    .sidebar-toggle {
        display: none;
    }

    .top-header-brand span {
        display: none;
    }
}

/* ---------- PRINT ---------- */
@media print {
    .sidebar, .top-header, .footer, .btn, .no-print {
        display: none !important;
    }

    .page-content {
        padding: 0;
        max-width: 100%;
    }

    .main-area {
        width: 100%;
    }

    table.grid {
        box-shadow: none;
    }
}