:root {
    color-scheme: light dark;
    --bg: #f5f6f8;
    --surface: #ffffff;
    --text: #1a1d23;
    --muted: #5b6472;
    --border: #dde1e6;
    --accent: #2f6feb;

    /* Teal design tokens — scoped to the shared top nav, Login, Dashboard,
       Settings and STAR Feedback pages. Deliberately namespaced (not reusing
       --bg/--surface/--accent/etc.) so Assessment Tracker, Marking Tracker
       and SoW Generator's own existing styling is untouched. */
    --teal-50: #f0fdfa;
    --teal-100: #ccfbf1;
    --teal-200: #99f6e4;
    --teal-500: #14b8a6;
    --teal-600: #0d9488;
    --teal-700: #0f766e;
    --teal-800: #115e59;
    --tn-ink: #1e293b;
    --tn-ink-soft: #64748b;
    --tn-line: #e2e8f0;
    --tn-bg: #f4f6f7;
    --tn-card: #ffffff;
    --tn-primary: var(--teal-600);
    --tn-primary-dark: var(--teal-700);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161a;
        --surface: #1e2126;
        --text: #e7e9ec;
        --muted: #9aa3af;
        --border: #2c3038;
        --accent: #6ea8fe;

        --teal-50: #0a2e2b;
        --teal-100: #0d3a35;
        --teal-200: #145349;
        --teal-500: #2dd4bf;
        --teal-600: #14b8a6;
        --teal-700: #0d9488;
        --teal-800: #0f766e;
        --tn-ink: #e7e9ec;
        --tn-ink-soft: #9aa3af;
        --tn-line: #2c3038;
        --tn-bg: #14161a;
        --tn-card: #1e2126;
        --tn-primary: var(--teal-500);
        --tn-primary-dark: var(--teal-600);
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ============================================================
   Dashboard — teal card grid redesign.
   ============================================================ */
.dash-wrap { padding: 32px 28px; max-width: 1000px; margin: 0 auto; }
.dash-wrap h1 { font-size: 22px; margin: 0 0 4px; color: var(--tn-ink); }
.dash-wrap .sub { color: var(--tn-ink-soft); font-size: 14px; margin: 0 0 28px; }
.app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.app-card {
    background: var(--tn-card);
    border: 1px solid var(--tn-line);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    gap: 14px;
    text-decoration: none;
    color: inherit;
    transition: box-shadow 0.15s, border-color 0.15s;
}
.app-card:hover {
    border-color: var(--teal-500);
    box-shadow: 0 6px 18px rgba(15, 118, 110, 0.10);
}
.app-icon {
    flex: 0 0 auto;
    width: 42px; height: 42px;
    border-radius: 10px;
    background: var(--teal-50);
    color: var(--teal-700);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px;
}
.app-card h3 { margin: 0 0 4px; font-size: 15px; color: var(--tn-ink); }
.app-card p { margin: 0; font-size: 13px; color: var(--tn-ink-soft); line-height: 1.4; }

@media (max-width: 640px) {
    .app-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Login page — teal split-panel redesign.
   ============================================================ */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--tn-bg);
    padding: 24px;
}
.login-card {
    display: flex;
    width: 720px;
    max-width: 100%;
    background: var(--tn-card);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(15, 118, 110, 0.12);
    border: 1px solid var(--tn-line);
}
.login-side {
    flex: 0 0 42%;
    background: linear-gradient(160deg, var(--teal-700), var(--teal-600));
    color: #fff;
    padding: 40px 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: 14px;
}
.login-side .cap {
    width: 52px; height: 52px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px;
}
.login-side h2 { margin: 0; font-size: 19px; }
.login-side p { margin: 0; font-size: 13px; color: var(--teal-100); }
.login-panel {
    flex: 1;
    padding: 40px 36px;
    min-width: 0;
}
.login-panel h3 { margin: 0 0 4px; font-size: 19px; color: var(--tn-ink); }
.login-panel .sub { margin: 0 0 24px; font-size: 13px; color: var(--tn-ink-soft); }
.login-field { margin-bottom: 16px; }
.login-field label { display: block; font-size: 13px; color: var(--tn-ink-soft); margin-bottom: 6px; }
.login-field input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--tn-line);
    border-radius: 8px;
    font-size: 14px;
    background: var(--tn-bg);
    color: var(--tn-ink);
    font-family: inherit;
}
.login-field input:focus {
    outline: none;
    border-color: var(--teal-500);
    box-shadow: 0 0 0 3px var(--teal-100);
    background: var(--tn-card);
}
.login-row-between {
    display: flex; align-items: center; justify-content: space-between;
    font-size: 13px; margin-bottom: 20px; color: var(--tn-ink-soft);
    flex-wrap: wrap; gap: 8px;
}
.login-row-between label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.login-row-between a { color: var(--teal-700); text-decoration: none; }
.login-row-between a:hover { text-decoration: underline; }
.btn-login-primary {
    width: 100%;
    background: var(--tn-primary);
    color: #fff;
    border: none;
    padding: 11px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}
.btn-login-primary:hover { background: var(--tn-primary-dark); }
.login-error {
    margin: 0 0 16px;
    padding: 10px 12px;
    background: #fde8e8;
    color: #9b1c1c;
    border-radius: 8px;
    font-size: 13px;
}
@media (prefers-color-scheme: dark) {
    .login-error { background: #3a1e1e; color: #f2a8a8; }
}

/* ============================================================
   Shared top nav (includes/topnav.php) — teal redesign.
   One component, included on every page; breadcrumb + user menu.
   ============================================================ */
.topnav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--tn-card);
    border-bottom: 1px solid var(--tn-line);
    padding: 14px 28px;
}
.topnav .crumb {
    font-size: 15px;
    font-weight: 600;
    color: var(--tn-ink);
    display: flex;
    align-items: center;
    gap: 6px;
}
.topnav .crumb .app-name {
    color: var(--teal-700);
    text-decoration: none;
}
.topnav .crumb .app-name:hover { text-decoration: underline; }
.topnav .crumb .sep { color: var(--tn-ink-soft); font-weight: 400; }
.topnav .crumb .page-name { color: var(--tn-ink); }
.topnav .right {
    display: flex;
    align-items: center;
    gap: 18px;
    font-size: 14px;
    color: var(--tn-ink);
}
.topnav .right a {
    color: var(--tn-ink-soft);
    text-decoration: none;
}
.topnav .right a:hover { color: var(--teal-700); }
.topnav .avatar {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--tn-primary);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700;
    flex-shrink: 0;
}

/* ============================================================
   Settings — teal panel redesign. Class names deliberately scoped
   under settings-* (never a bare .hint etc.) since assets/style.css
   is loaded globally and must not restyle other tools' own markup.
   ============================================================ */
.settings-wrap { padding: 32px 28px; max-width: 620px; margin: 0 auto; }
.settings-panel {
    background: var(--tn-card);
    border: 1px solid var(--tn-line);
    border-radius: 12px;
    padding: 26px;
}
.settings-panel h2 { margin: 0 0 6px; font-size: 18px; color: var(--tn-ink); }
.settings-panel .settings-sub { margin: 0 0 22px; font-size: 13px; color: var(--tn-ink-soft); line-height: 1.5; }
.settings-panel .settings-sub code {
    background: var(--teal-50); color: var(--teal-700);
    padding: 1px 5px; border-radius: 4px; font-size: 12px;
}
.settings-field { margin-bottom: 18px; }
.settings-field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 6px; color: var(--tn-ink); }
.settings-field select {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--tn-line);
    border-radius: 8px;
    font-size: 14px;
    background: var(--tn-bg);
    color: var(--tn-ink);
    font-family: inherit;
}
.settings-field .settings-hint { margin: 6px 0 0; font-size: 12px; color: var(--tn-ink-soft); }
.settings-checkbox {
    display: flex; align-items: center; gap: 8px;
    font-size: 13.5px; font-weight: 600; color: var(--tn-ink);
    margin-bottom: 6px;
}
.btn-save {
    background: var(--tn-primary); color: #fff; border: none;
    padding: 10px 20px; border-radius: 8px;
    font-size: 14px; font-weight: 600; cursor: pointer;
    font-family: inherit;
}
.btn-save:hover { background: var(--tn-primary-dark); }
.settings-flash { padding: 10px 12px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; }
.settings-flash.ok { background: var(--teal-50); color: var(--teal-800); }
.settings-flash.error { background: #fde8e8; color: #9b1c1c; }
@media (prefers-color-scheme: dark) {
    .settings-flash.error { background: #3a1e1e; color: #f2a8a8; }
}