/* TNPSC portal-wide design system. Loaded after style.css and portal.css. */
:root {
    --portal-primary: #1d4ed8; /* Same blue as the login button */
    --portal-primary-hover: #1744bf;
    --portal-primary-dark: #003366;
    --portal-primary-soft: #eaf1ff;
    --portal-danger: #c0392b;
    --portal-danger-hover: #a93226;
    --portal-text: #1b2733;
    --portal-muted: #5d6b7a;
    --portal-border: #dbe3ec;
    --portal-shadow: 0 3px 12px rgba(0, 51, 102, .07);
}

html { min-height: 100%; scroll-behavior: smooth; }
body { color: var(--portal-text); }
.tn-main, .tn-main > main { min-width: 0; width: 100%; }

/* Shared dimensions and typography for interactive controls. */
button,
input[type="submit"],
input[type="button"],
.btn,
.button,
.action-btn,
.action-button,
.tab-btn,
.tab-button,
.manage-tab,
.question-tab,
.exam-btn,
.start-test-button,
.back-button,
.tn-btn,
.tn-login-card button {
    box-sizing: border-box;
    border-radius: 8px;
    font-family: "Segoe UI", Roboto, "Nirmala UI", Arial, sans-serif;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.35;
    transition: background-color .16s ease, border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

/* Blue is the consistent primary colour across normal page actions. */
button,
input[type="submit"],
input[type="button"],
.btn-primary,
.btn-success,
.btn-info,
.btn-submit,
.btn-create,
.btn-edit,
.btn-view,
.action-btn,
.action-button,
.tab-btn,
.tab-button,
.manage-tab,
.question-tab,
.exam-btn-primary,
.exam-btn-submit,
.start-test-button,
.tn-btn,
.tn-login-card button {
    background-color: var(--portal-primary);
    border: 1px solid var(--portal-primary);
    color: #fff;
}

button:hover:not(:disabled),
input[type="submit"]:hover,
input[type="button"]:hover,
.btn-primary:hover,
.btn-success:hover,
.btn-info:hover,
.btn-submit:hover,
.btn-create:hover,
.btn-edit:hover,
.btn-view:hover,
.action-btn:hover,
.action-button:hover,
.tab-btn:hover,
.tab-button:hover,
.manage-tab:hover,
.question-tab:hover,
.exam-btn-primary:hover,
.exam-btn-submit:hover,
.start-test-button:hover,
.tn-btn:hover,
.tn-login-card button:hover {
    background-color: var(--portal-primary-hover);
    border-color: var(--portal-primary-hover);
    color: #fff;
}

.btn-secondary,
.btn-light,
.btn-outline,
.back-button,
.exam-btn-light,
.tn-btn.alt,
#tn-cancel,
button.secondary,
a.secondary,
input.secondary {
    background: var(--portal-primary-soft);
    border: 1px solid #cbdaf8;
    color: var(--portal-primary-dark);
}

.btn-secondary:hover,
.btn-light:hover,
.btn-outline:hover,
.back-button:hover,
.exam-btn-light:hover,
.tn-btn.alt:hover,
#tn-cancel:hover,
button.secondary:hover,
a.secondary:hover {
    background: #dce8ff;
    color: var(--portal-primary-dark);
}

/* Red is reserved for logout and destructive actions. */
.btn-danger,
.btn-delete,
.delete-btn,
.btn-remove,
.danger,
.tn-logout,
.tn-modal-actions #tn-confirm {
    background: var(--portal-danger);
    border: 1px solid var(--portal-danger);
    color: #fff;
}

.btn-danger:hover,
.btn-delete:hover,
.delete-btn:hover,
.btn-remove:hover,
.danger:hover,
.tn-logout:hover,
.tn-modal-actions #tn-confirm:hover {
    background: var(--portal-danger-hover);
    border-color: var(--portal-danger-hover);
    color: #fff;
}

.btn-disabled,
.btn:disabled,
button:disabled,
input[type="submit"]:disabled,
input[type="button"]:disabled,
.exam-btn:disabled {
    background: #e5e7eb !important;
    border-color: #d1d5db !important;
    color: #6b7280 !important;
    cursor: not-allowed;
    box-shadow: none !important;
    transform: none !important;
    opacity: .85;
}

/* Shared tab styling for test management and question management tabs. */
.tabs,
.tab-list,
.tab-buttons,
.manage-tabs,
.question-tabs,
.nav-tabs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    border-bottom: 1px solid var(--portal-border);
    padding: 0 0 10px;
    margin: 0 0 20px;
}

.tabs a,
.tabs button,
.tab-list a,
.tab-list button,
.tab-buttons a,
.tab-buttons button,
.manage-tabs a,
.manage-tabs button,
.question-tabs a,
.question-tabs button,
.nav-tabs .nav-link,
.nav-tabs a,
.nav-tabs button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 9px 15px;
    border: 1px solid var(--portal-primary);
    border-radius: 8px;
    background: var(--portal-primary);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
}

.tabs .active,
.tab-list .active,
.tab-buttons .active,
.manage-tabs .active,
.question-tabs .active,
.nav-tabs .active,
.nav-tabs .nav-link.active,
.tabs [aria-selected="true"],
.tab-buttons [aria-selected="true"] {
    background: var(--portal-primary-dark) !important;
    border-color: var(--portal-primary-dark) !important;
    color: #fff !important;
}

/* Shared page headings and content widths. */
.tn-content-page, .student-dashboard, .admin-page, .manage-tests-page,
.manage-questions-page, .results-page, .report-page { color: var(--portal-text); }
.container, .admin-container, .page-container, .content-container {
    max-width: 1300px;
    margin-left: auto;
    margin-right: auto;
}
.dashboard-header, .tn-page-heading {
    gap: 18px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--portal-border);
}
.dashboard-header h1, .tn-page-heading h1, .page-header h1 {
    color: var(--portal-primary-dark);
    line-height: 1.25;
}
.dashboard-header p, .section-heading p, .tn-page-eyebrow, .tn-chart-caption {
    color: var(--portal-muted);
}
.tn-page-eyebrow {
    margin: 0 0 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .7px;
    text-transform: uppercase;
}
.tn-page-actions, .header-actions, .form-actions, .action-buttons, .button-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.card, .panel, .test-card, .dashboard-stat, .dashboard-panel,
.tn-card, .instructions-card, .tn-login-card {
    border-color: var(--portal-border);
    border-radius: 12px;
    box-shadow: var(--portal-shadow);
}

input:not([type="radio"]):not([type="checkbox"]),
select, textarea {
    max-width: 100%;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    padding: 10px 12px;
    color: var(--portal-text);
    background: #fff;
    font: inherit;
}
input:focus, select:focus, textarea:focus,
button:focus-visible, a:focus-visible {
    outline: 3px solid rgba(29, 78, 216, .22);
    outline-offset: 2px;
}
label { color: #374151; font-weight: 600; }

/* Common table design for student imports, tests and reports. */
table { width: 100%; border-collapse: collapse; background: #fff; color: var(--portal-text); }
thead th, table thead th {
    background: #eaf1ff;
    color: var(--portal-primary-dark);
    font-weight: 700;
    border-bottom: 1px solid #cbdaf8;
    text-align: left;
}
td, th { padding: 11px 12px; border-bottom: 1px solid var(--portal-border); vertical-align: middle; }
tbody tr:hover { background: #f8faff; }

/* Login page fills the usable viewport and lets the explanatory panel breathe. */
.tn-login.tn-login-fullpage {
    width: min(1480px, calc(100% - 40px));
    max-width: 1480px;
    min-height: clamp(560px, calc(100svh - 235px), 900px);
    margin: 18px auto 28px;
    padding: 0;
    grid-template-columns: minmax(0, 1.25fr) minmax(360px, .85fr);
    align-items: stretch;
    gap: 22px;
}
.tn-login-fullpage .tn-login-banner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: clamp(24px, 3vw, 46px);
    border-radius: 16px;
    box-shadow: var(--portal-shadow);
}
.tn-login-fullpage .tn-login-banner img { width: 112px; height: 120px; flex: 0 0 auto; }
.tn-login-eyebrow {
    margin: 18px 0 6px;
    color: #d9f2d6;
    font-weight: 700;
    font-size: 12px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
}
.tn-login-fullpage .tn-login-banner h1 {
    max-width: 740px;
    font-size: clamp(25px, 2.8vw, 36px);
    line-height: 1.25;
}
.tn-login-subtitle { font-size: 17px !important; }
.tn-login-description {
    width: 100%;
    max-width: 720px;
    margin-top: 26px;
    padding: 22px 24px;
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 12px;
    background: rgba(255,255,255,.09);
    text-align: left;
}
.tn-login-description h2 { margin: 0 0 10px; color: #fff; font-size: 19px; }
.tn-login-description p { font-size: 14px; line-height: 1.75; }
.tn-login-feature-list { display: grid; gap: 10px; margin: 18px 0; }
.tn-login-feature-list div { display: flex; align-items: flex-start; gap: 10px; line-height: 1.6; font-size: 14px; }
.tn-login-feature-list span:first-child { color: #b5edac; font-size: 18px; font-weight: 800; }
.tn-login-important { padding-top: 14px; border-top: 1px solid rgba(255,255,255,.24); color: #fff2d4; }
.tn-login-fullpage .tn-login-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(24px, 3vw, 42px);
    border-radius: 16px;
}
.tn-login-form-heading { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 20px; }
.tn-login-icon { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; border-radius: 10px; background: var(--portal-primary-soft); font-size: 21px; }
.tn-login-form-heading h2 { margin: 0 0 6px; color: var(--portal-primary-dark); font-size: 24px; }
.tn-login-form-heading p { margin: 0; color: var(--portal-muted); font-size: 14px; line-height: 1.55; }
.tn-login-card label { margin-top: 18px; }
.tn-login-card input { min-height: 46px; background: #fff; }
.tn-login-card button { min-height: 48px; margin-top: 22px; }
.tn-login-help { margin: 14px 0 0; color: var(--portal-muted); font-size: 12.5px; line-height: 1.7; }
.tn-login-security-note { display: flex; gap: 10px; align-items: flex-start; padding-top: 18px; margin-top: 22px; border-top: 1px solid var(--portal-border); color: var(--portal-muted); }
.tn-login-security-note p { margin: 0; font-size: 12.5px; line-height: 1.7; }

/* Status colours remain separate from action-button colours. */
.status-badge, .tn-status, .status-pill {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}
.status-badge.available, .tn-status-active { color: #126b35; background: #e1f4e8; }
.status-badge.used, .status-badge.completed, .tn-status-inactive { color: #7a2a22; background: #fde8e8; }
.status-badge.in-progress { color: #855500; background: #fff0d6; }

.tn-dash { max-width: 1380px; padding: 12px 18px 36px; }
.tn-dash-head { margin-bottom: 22px; }
.tn-dash-head h1 { font-size: clamp(24px, 2.4vw, 32px); }
.tn-cards, .tn-grid2 { gap: 16px; }
.tn-card { min-width: 0; }
.tn-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; line-height: 1.6; }
.tn-result-name { overflow-wrap: anywhere; }
.tn-bars { align-items: flex-end; height: 170px; }
.tn-performance-bar { min-width: 18px; }
.tn-performance-bar span { white-space: nowrap; }

@media (max-width: 980px) {
    .tn-login.tn-login-fullpage { grid-template-columns: 1fr; min-height: auto; width: min(760px, calc(100% - 28px)); }
    .tn-login-fullpage .tn-login-banner { min-height: 0; }
    .tn-login-fullpage .tn-login-card { min-height: 430px; }
}
@media (max-width: 600px) {
    .tn-login.tn-login-fullpage { width: calc(100% - 24px); margin: 12px auto 20px; gap: 12px; }
    .tn-login-fullpage .tn-login-banner { padding: 22px 16px; }
    .tn-login-fullpage .tn-login-banner img { width: 86px; height: 94px; }
    .tn-login-description { padding: 16px; margin-top: 18px; }
    .tn-login-description h2 { font-size: 17px; }
    .tn-login-fullpage .tn-login-card { min-height: 0; padding: 22px 18px; }
    .tn-login-form-heading h2 { font-size: 21px; }
    .tn-page-actions, .header-actions, .form-actions, .action-buttons, .button-group { width: 100%; }
    .tn-page-actions > a, .header-actions > a { flex: 1 1 auto; text-align: center; }
    td, th { padding: 9px 8px; }
}

/* Explicit catch-all for conventional action classes used by management pages. */
a.btn:not(.btn-secondary):not(.btn-light):not(.btn-outline):not(.btn-danger):not(.btn-delete):not(.btn-remove):not(.btn-disabled),
a.button:not(.secondary):not(.danger):not(.disabled),
button.btn:not(.btn-secondary):not(.btn-light):not(.btn-outline):not(.btn-danger):not(.btn-delete):not(.btn-remove):not(.btn-disabled),
.btn-primary, .btn-success, .btn-info, .btn-warning, .btn-default,
.btn-add, .btn-upload, .btn-download, .btn-manage, .btn-tab, .tab-link,
button.tab, a.tab, .tab-item > a {
    background-color: var(--portal-primary);
    border-color: var(--portal-primary);
    color: #fff;
}

#exam-form .exam-btn-submit {
    background-color: var(--portal-primary) !important;
    border-color: var(--portal-primary) !important;
    color: #fff !important;
}
#exam-form .exam-btn-submit:hover:not(:disabled) {
    background-color: var(--portal-primary-hover) !important;
    border-color: var(--portal-primary-hover) !important;
}