/* STS Public Styles — v3.0 Phase 3 UI/UX Overhaul */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --sts-primary:      #800000;
    --sts-primary-dark: #5f0000;
    --sts-primary-light:#fdf2f2;
    --sts-accent:       #FFD700;
    --sts-bg:           #f0f2f5;
    --sts-card:         #ffffff;
    --sts-text:         #111827;
    --sts-muted:        #6b7280;
    --sts-border:       #e5e7eb;
    --sts-focus:        #2563eb;
    --sts-success:      #16a34a;
    --sts-danger:       #dc2626;
    --sts-shadow:       0 4px 12px -2px rgba(0,0,0,.10), 0 1px 3px rgba(0,0,0,.06);
    --sts-shadow-hover: 0 16px 32px -8px rgba(128,0,0,.18);
    --sts-radius:       12px;
    --sts-radius-sm:    6px;
    --sts-font:         'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --sts-transition:   160ms cubic-bezier(.4,0,.2,1);
}

.sts-choice-container,
.sts-teacher-portal,
.sts-public-results,
.sts-auth-card {
    font-family: var(--sts-font);
    -webkit-font-smoothing: antialiased;
}

/* Choice Gate Styles */
.sts-choice-container {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 48px 0;
    flex-wrap: wrap;
}

.sts-choice-box {
    flex: 1;
    min-width: 260px;
    max-width: 320px;
    padding: 44px 24px;
    text-align: center;
    background: var(--sts-card);
    border: 1.5px solid var(--sts-border);
    border-radius: var(--sts-radius);
    cursor: pointer;
    transition: transform var(--sts-transition), box-shadow var(--sts-transition), border-color var(--sts-transition);
    box-shadow: var(--sts-shadow);
    text-decoration: none;
    color: inherit;
    display: block;
}

.sts-choice-box:hover {
    border-color: var(--sts-primary);
    box-shadow: var(--sts-shadow-hover);
    transform: translateY(-4px);
}

.sts-choice-icon {
    font-size: 52px;
    color: var(--sts-primary);
    margin-bottom: 20px;
    display: block;
}

.sts-choice-box h3 {
    margin: 0 0 10px;
    color: var(--sts-primary);
    font-size: 18px;
    font-weight: 700;
}

.sts-choice-box p {
    margin: 0;
    color: var(--sts-muted);
    font-size: 14px;
    line-height: 1.5;
}

/* Login Form Styles */
#sts-login-form-container {
    max-width: 420px;
    margin: 48px auto;
}

.sts-auth-card {
    max-width: 480px;
    background: var(--sts-card);
    border: 1.5px solid var(--sts-border);
    border-radius: var(--sts-radius);
    box-shadow: var(--sts-shadow);
    padding: 32px 36px;
    margin: 0 auto;
}

.sts-auth-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 8px;
    color: var(--sts-primary);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.2px;
}

.sts-auth-card h3 .dashicons {
    color: var(--sts-accent);
    font-size: 26px;
    width: 26px;
    height: 26px;
}

.sts-auth-card > p {
    color: var(--sts-muted);
    font-size: 14px;
    margin: 0 0 24px;
}

.sts-back-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 20px;
    color: var(--sts-primary);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: color var(--sts-transition);
}

.sts-back-link:hover {
    color: var(--sts-primary-dark);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sts-choice-container {
        flex-direction: column;
        align-items: center;
    }

    .sts-choice-box {
        width: 100%;
        max-width: 400px;
    }
}

/* Teacher Portal Styles */
.sts-teacher-portal {
    background: var(--sts-bg);
    min-height: 100vh;
    padding: 20px;
}

.sts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    color: var(--sts-primary);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.sts-header h1 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    font-size: 2.5em;
}

.sts-header h1 .dashicons {
    width: 42px;
    height: 42px;
    color: var(--sts-accent);
    font-size: 42px;
}

.sts-logout-btn {
    background: var(--sts-primary);
    color: white;
    border: 1px solid var(--sts-primary);
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.sts-logout-btn:hover {
    background: var(--sts-primary-dark);
    transform: translateY(-2px);
}

.sts-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.sts-quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto 30px;
}

.sts-quick-stat {
    background: var(--sts-card);
    border: 1px solid rgba(128, 0, 0, 0.08);
    border-radius: 12px;
    box-shadow: var(--sts-shadow);
    padding: 20px;
}

.sts-quick-stat-label {
    margin: 0 0 8px;
    color: var(--sts-muted);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.sts-quick-stat-number {
    margin: 0;
    color: var(--sts-primary);
    font-size: 38px;
    font-weight: 850;
    line-height: 1;
}

.sts-card {
    background: white;
    border: 1px solid rgba(209, 213, 219, 0.72);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.sts-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 24px -14px rgba(17, 24, 39, 0.45);
}

.sts-card-icon {
    width: 58px;
    height: 58px;
    font-size: 58px;
    margin-bottom: 20px;
    display: inline-block;
}

.sts-card h3 {
    margin: 0 0 10px 0;
    font-size: 1.5em;
    color: var(--sts-primary);
}

.sts-card p {
    color: var(--sts-muted);
    margin: 0;
}

/* Frontend Notice Messages */
.sts-message {
    padding: 14px 18px;
    margin-bottom: 20px;
    border-radius: var(--sts-radius-sm);
    border: 1px solid transparent;
    border-left-width: 4px;
    font-size: 14px;
    line-height: 1.5;
}

.sts-message.success {
    background: #f0fdf4;
    border-color: #bbf7d0;
    border-left-color: var(--sts-success);
    color: #166534;
}

.sts-message.error {
    background: #fef2f2;
    border-color: #fecaca;
    border-left-color: var(--sts-danger);
    color: #991b1b;
}

.sts-message.info {
    background: #eff6ff;
    border-color: #bfdbfe;
    border-left-color: #3b82f6;
    color: #1e40af;
}

.sts-message p {
    margin: 0;
    padding: 0;
}

.sts-card-enter-marks .sts-card-icon { color: #16a34a; }
.sts-card-roster .sts-card-icon { color: #2563eb; }
.sts-card-profile .sts-card-icon { color: var(--sts-accent); }

.sts-shortcuts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto 30px;
}

.sts-shortcut-card {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 76px;
    padding: 18px;
    background: var(--sts-card);
    border: 1px solid rgba(209, 213, 219, 0.72);
    border-radius: 12px;
    box-shadow: var(--sts-shadow);
    color: var(--sts-text);
    text-decoration: none;
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.sts-shortcut-card:hover,
.sts-shortcut-card:focus {
    border-color: var(--sts-primary);
    box-shadow: 0 14px 24px -14px rgba(17, 24, 39, 0.45);
    color: var(--sts-primary);
    transform: translateY(-2px);
    outline: none;
}

.sts-shortcut-icon {
    width: 34px;
    height: 34px;
    color: var(--sts-primary);
    font-size: 34px;
}

.sts-shortcut-title {
    font-size: 16px;
    font-weight: 800;
}

.sts-public-card {
    max-width: 960px;
    margin: 40px auto;
    padding: 28px 32px;
    background: var(--sts-card);
    border: 1.5px solid var(--sts-border);
    border-radius: var(--sts-radius);
    box-shadow: var(--sts-shadow);
}

.sts-portal-panel {
    max-width: 1200px;
}

.sts-public-card h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 22px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--sts-primary-light);
    color: var(--sts-primary);
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.2px;
}

.sts-result-search-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 14px;
    align-items: end;
    margin-bottom: 28px;
    background: #f9fafb;
    border: 1.5px solid var(--sts-border);
    border-radius: var(--sts-radius);
    padding: 20px 22px;
}

.sts-result-search-form label {
    display: block;
    margin-bottom: 6px;
    color: var(--sts-text);
    font-size: 13px;
    font-weight: 600;
}

.sts-result-search-form input,
.sts-public-results input,
.sts-public-results select,
.sts-portal-panel input[type="number"],
.sts-portal-panel input[type="text"],
.sts-portal-panel select,
.sts-auth-card input[type="text"],
.sts-auth-card input[type="email"],
.sts-auth-card input[type="password"],
.sts-auth-card select {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--sts-border);
    border-radius: 8px;
    padding: 8px 12px;
}

.sts-result-search-form input:focus,
.sts-public-results input:focus,
.sts-public-results select:focus,
.sts-auth-card input:focus,
.sts-auth-card select:focus {
    border-color: var(--sts-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
    outline: none;
}

.sts-public-button,
.sts-public-results button,
.sts-auth-card input[type="submit"] {
    min-height: 44px;
    padding: 10px 22px;
    border: none;
    border-radius: var(--sts-radius-sm);
    background: var(--sts-primary);
    color: #fff;
    cursor: pointer;
    font-family: var(--sts-font);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .01em;
    box-shadow: 0 2px 8px -2px rgba(128,0,0,.40);
    transition: transform var(--sts-transition), background-color var(--sts-transition), box-shadow var(--sts-transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.sts-public-button:hover,
.sts-public-results button:hover,
.sts-auth-card input[type="submit"]:hover {
    background: var(--sts-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px -4px rgba(128,0,0,.50);
}

.sts-public-button:focus-visible,
.sts-public-results button:focus-visible,
.sts-auth-card input[type="submit"]:focus-visible {
    outline: 3px solid var(--sts-focus);
    outline-offset: 2px;
}

.sts-public-table-wrap {
    overflow-x: auto;
}

.sts-checkbox-panel {
    max-height: 200px;
    overflow-y: auto;
    width: min(100%, 420px);
    border: 1px solid var(--sts-border);
    border-radius: 10px;
    background: #f9fafb;
    padding: 10px;
}

.sts-checkbox-panel label {
    display: block;
    margin-bottom: 7px;
}

.sts-description-error {
    color: #dc2626;
}

.sts-text-center {
    text-align: center;
}

.sts-mark-input {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sts-mark-input input[type="number"] {
    width: 76px;
}

.sts-mark-input span {
    color: var(--sts-muted);
    font-size: 12px;
}

.sts-public-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--sts-border);
    border-radius: var(--sts-radius);
    overflow: hidden;
    font-family: var(--sts-font);
    font-size: 14px;
}

.sts-public-table th,
.sts-public-table td {
    padding: 13px 16px;
    border-bottom: 1px solid #f3f4f6;
    text-align: left;
    vertical-align: middle;
}

.sts-public-table th {
    color: var(--sts-primary);
    background: #f8f9fa;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    border-bottom: 2px solid var(--sts-border);
}

.sts-public-table tbody tr:last-child td {
    border-bottom: none;
}

.sts-public-table tbody tr:hover {
    background: var(--sts-primary-light);
}

/* Student profile info block */
.sts-student-profile {
    background: #f9fafb;
    border: 1.5px solid var(--sts-border);
    border-left: 4px solid var(--sts-primary);
    border-radius: var(--sts-radius-sm);
    padding: 16px 20px;
    margin: 0 0 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 32px;
}

.sts-student-profile p {
    margin: 0;
    font-size: 14px;
    color: var(--sts-text);
}

.sts-student-profile strong {
    color: var(--sts-primary);
    font-weight: 600;
}

/* Responsive for Teacher Portal */
@media (max-width: 768px) {
    .sts-teacher-portal { padding: 12px; }

    .sts-header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .sts-header h1 { font-size: 1.8em; }

    .sts-dashboard-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .sts-shortcuts {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .sts-public-card {
        padding: 20px 18px;
        margin: 20px auto;
    }

    .sts-result-search-form {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .sts-auth-card {
        padding: 24px 20px;
    }

    .sts-choice-container {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .sts-choice-box {
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 480px) {
    .sts-shortcuts { grid-template-columns: 1fr; }
    .sts-quick-stats { grid-template-columns: 1fr 1fr; }
}

/* =========================================================================
   Teacher Portal Floating Action Button (FAB)
   Shown on homepage for logged-in teachers.
   ========================================================================= */
.sts-portal-fab {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 9999;
}

.sts-portal-fab__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    padding: 14px 24px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    text-decoration: none;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.sts-portal-fab__link:hover,
.sts-portal-fab__link:focus {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
    outline: 2px solid currentColor;
    outline-offset: 2px;
}

@media (max-width: 480px) {
    .sts-portal-fab {
        bottom: 16px;
        right: 16px;
    }
    .sts-portal-fab__link {
        font-size: 0.9rem;
        padding: 10px 16px;
    }
}