/* ════════════════════════════════════════════════════════════════
   UPNG GPA Calculator — Design System
   Heritage navy + gold, rebuilt for a modern, accessible, dual-theme UI.
   The masthead stays institutional navy in both themes: this is a
   university tool first and a web app second.
   No external fonts or assets: everything here is self-contained.
   ════════════════════════════════════════════════════════════════ */

/* ── 1. Tokens ───────────────────────────────────────────────── */
:root {
    /* Brand */
    --brand: #003366;
    --brand-600: #0a4a8f;
    --brand-500: #1f6fc4;
    --brand-400: #4b93e0;
    --gold: #ffc93c;
    --gold-deep: #a97400;
    /* Brand ink — navy text that stays legible on the page background */
    --brand-ink: #0a4a8f;

    /* Masthead — fixed across themes so the institutional bar never changes */
    --masthead: #002b57;
    --masthead-2: #004a8f;
    --on-masthead: #ffffff;
    --on-masthead-muted: rgba(255, 255, 255, 0.76);
    --masthead-line: rgba(255, 255, 255, 0.16);
    --masthead-tint: rgba(255, 255, 255, 0.09);

    /* Canvas & surfaces */
    --bg: #f4f6fa;
    --surface: #ffffff;
    --surface-2: #f7f9fc;
    --surface-3: #eef2f8;
    --surface-inset: #ffffff;

    /* Ink */
    --text: #0f1b2d;
    --text-muted: #55677f;
    --text-faint: #8494a9;
    --on-brand: #ffffff;

    /* Lines */
    --border: rgba(15, 40, 80, 0.11);
    --border-strong: rgba(15, 40, 80, 0.2);
    --divider: rgba(15, 40, 80, 0.07);

    /* Interaction */
    --ring: rgba(31, 111, 196, 0.28);
    --hover-tint: rgba(31, 111, 196, 0.05);
    --active-tint: rgba(31, 111, 196, 0.09);

    /* Status */
    --danger: #cc2f2f;
    --danger-soft: rgba(204, 47, 47, 0.09);
    --warn: #a35b00;
    --warn-soft: #fff8e8;
    --warn-line: rgba(217, 131, 36, 0.4);
    --success: #0f7a52;

    /* Grade palette */
    --g-hd: #b07d00;
    --g-di: #1f6fc4;
    --g-cr: #0d8a72;
    --g-pa: #5b6d8a;
    --g-cp: #b06a12;
    --g-f: #c0392b;

    /* Elevation */
    --shadow-sm: 0 1px 2px rgba(10, 26, 51, 0.06), 0 1px 3px rgba(10, 26, 51, 0.05);
    --shadow-md: 0 2px 4px rgba(10, 26, 51, 0.04), 0 8px 24px rgba(10, 26, 51, 0.07);
    --shadow-lg: 0 4px 8px rgba(10, 26, 51, 0.05), 0 24px 48px rgba(10, 26, 51, 0.12);
    --shadow-brand: 0 6px 20px rgba(0, 51, 102, 0.24);

    /* Geometry */
    --r-xs: 7px;
    --r-sm: 10px;
    --r-md: 14px;
    --r-lg: 20px;
    --r-xl: 26px;
    --r-full: 999px;
    --header-h: 66px;
    --wrap: 1180px;

    /* Motion */
    --ease: cubic-bezier(0.32, 0.72, 0.28, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --fast: 0.14s;
    --mid: 0.24s;
    --slow: 0.42s;

    /* Type */
    --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
        "Helvetica Neue", "Noto Sans", Arial, sans-serif;
    --font-num: ui-rounded, "SF Pro Rounded", ui-sans-serif, system-ui, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    color-scheme: light;
}

/* Dark — system preference, unless the user explicitly chose light */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --brand: #12325c;
        --brand-600: #1c5ba3;
        --brand-500: #4d94e8;
        --brand-400: #7fb4f2;
        --gold: #ffd166;
        --gold-deep: #ffcf5c;
        --brand-ink: #7fb4f2;

        --masthead: #041a33;
        --masthead-2: #0a3466;

        --bg: #070b13;
        --surface: #0e1522;
        --surface-2: #131c2c;
        --surface-3: #1a2435;
        --surface-inset: #0b111c;

        --text: #e9eefa;
        --text-muted: #9dadc6;
        --text-faint: #71829c;
        --on-brand: #ffffff;

        --border: rgba(150, 180, 225, 0.14);
        --border-strong: rgba(150, 180, 225, 0.26);
        --divider: rgba(150, 180, 225, 0.09);

        --ring: rgba(93, 158, 235, 0.4);
        --hover-tint: rgba(120, 170, 240, 0.06);
        --active-tint: rgba(120, 170, 240, 0.11);

        --danger: #ff7a7a;
        --danger-soft: rgba(255, 122, 122, 0.12);
        --warn: #ffcc80;
        --warn-soft: rgba(217, 131, 36, 0.14);
        --warn-line: rgba(255, 190, 100, 0.34);
        --success: #56d3a0;

        --g-hd: #ffd166;
        --g-di: #6aa9f0;
        --g-cr: #3fc9a8;
        --g-pa: #9fb0cc;
        --g-cp: #f0a95c;
        --g-f: #ff8a80;

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
        --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.45), 0 12px 32px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.5), 0 32px 64px rgba(0, 0, 0, 0.55);
        --shadow-brand: 0 6px 22px rgba(0, 0, 0, 0.55);

        color-scheme: dark;
    }
}

/* Dark — explicit user choice (wins over system light) */
:root[data-theme="dark"] {
    --brand: #12325c;
    --brand-600: #1c5ba3;
    --brand-500: #4d94e8;
    --brand-400: #7fb4f2;
    --gold: #ffd166;
    --gold-deep: #ffcf5c;
    --brand-ink: #7fb4f2;

    --masthead: #041a33;
    --masthead-2: #0a3466;

    --bg: #070b13;
    --surface: #0e1522;
    --surface-2: #131c2c;
    --surface-3: #1a2435;
    --surface-inset: #0b111c;

    --text: #e9eefa;
    --text-muted: #9dadc6;
    --text-faint: #71829c;
    --on-brand: #ffffff;

    --border: rgba(150, 180, 225, 0.14);
    --border-strong: rgba(150, 180, 225, 0.26);
    --divider: rgba(150, 180, 225, 0.09);

    --ring: rgba(93, 158, 235, 0.4);
    --hover-tint: rgba(120, 170, 240, 0.06);
    --active-tint: rgba(120, 170, 240, 0.11);

    --danger: #ff7a7a;
    --danger-soft: rgba(255, 122, 122, 0.12);
    --warn: #ffcc80;
    --warn-soft: rgba(217, 131, 36, 0.14);
    --warn-line: rgba(255, 190, 100, 0.34);
    --success: #56d3a0;

    --g-hd: #ffd166;
    --g-di: #6aa9f0;
    --g-cr: #3fc9a8;
    --g-pa: #9fb0cc;
    --g-cp: #f0a95c;
    --g-f: #ff8a80;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 2px 6px rgba(0, 0, 0, 0.45), 0 12px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.5), 0 32px 64px rgba(0, 0, 0, 0.55);
    --shadow-brand: 0 6px 22px rgba(0, 0, 0, 0.55);

    color-scheme: dark;
}

/* ── 2. Base ─────────────────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Ambient light — a soft brand wash behind everything */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(58% 42% at 8% -8%, color-mix(in oklab, var(--brand-500) 20%, transparent), transparent 68%),
        radial-gradient(44% 38% at 96% -4%, color-mix(in oklab, var(--gold) 16%, transparent), transparent 70%),
        radial-gradient(70% 46% at 52% 108%, color-mix(in oklab, var(--brand-400) 12%, transparent), transparent 74%);
}

h1,
h2,
h3,
h4 {
    margin: 0;
    line-height: 1.18;
    letter-spacing: -0.022em;
    font-weight: 700;
    text-wrap: balance;
}

p {
    margin: 0;
    text-wrap: pretty;
}

a {
    color: var(--brand-600);
    text-decoration-color: color-mix(in oklab, var(--brand-600) 35%, transparent);
    text-underline-offset: 3px;
    transition: color var(--fast) var(--ease);
}

a:hover {
    color: var(--brand-500);
    text-decoration-color: currentColor;
}

::selection {
    background: color-mix(in oklab, var(--gold) 55%, transparent);
    color: var(--text);
}

:focus-visible {
    outline: 2px solid var(--brand-500);
    outline-offset: 2px;
    border-radius: var(--r-xs);
}

/* ── 3. Utilities ────────────────────────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 50%;
    z-index: 300;
    transform: translate(-50%, -160%);
    padding: 10px 20px;
    border-radius: var(--r-full);
    background: var(--brand);
    color: #fff;
    font-size: 0.88rem;
    font-weight: 650;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: transform var(--mid) var(--ease-out);
}

.skip-link:focus-visible {
    transform: translate(-50%, 0);
    color: #fff;
}

/* ── 4. Masthead ─────────────────────────────────────────────── */
/* The institutional bar: heritage navy with a gold rule, identical in
   light and dark so the university identity is never themed away. */
.site-header {
    position: sticky;
    top: 0;
    z-index: 120;
    color: var(--on-masthead);
    background:
        linear-gradient(100deg, var(--masthead) 0%, var(--masthead) 42%, var(--masthead-2) 130%);
    border-bottom: 3px solid var(--gold);
    box-shadow: 0 1px 16px rgba(0, 22, 48, 0.24);
}

.header-inner {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 clamp(14px, 3vw, 28px);
    min-height: var(--header-h);
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Brand lockup: crest, institution name, tool name */
.header-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-right: auto;
    min-width: 0;
    color: var(--on-masthead);
    text-decoration: none;
}

.brand-mark {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    transition: transform var(--mid) var(--ease-out);
}

.header-brand:hover .brand-mark {
    transform: scale(1.05);
}

.brand-lockup {
    display: flex;
    flex-direction: column;
    min-width: 0;
    line-height: 1.15;
}

.brand-institution {
    color: var(--gold);
    font-size: 0.63rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.brand-tool {
    font-size: 1.02rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    white-space: nowrap;
}

/* Segmented navigation, sitting on the navy */
.site-nav {
    display: flex;
    gap: 2px;
    padding: 4px;
    border: 1px solid var(--masthead-line);
    border-radius: var(--r-full);
    background: var(--masthead-tint);
}

.nav-link {
    position: relative;
    padding: 7px 15px;
    border-radius: var(--r-full);
    color: var(--on-masthead-muted);
    font-size: 0.855rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.nav-link:hover {
    color: var(--on-masthead);
    background: rgba(255, 255, 255, 0.14);
}

.nav-link.active {
    background: var(--on-masthead);
    color: var(--masthead);
    font-weight: 700;
}

.nav-link.active:hover {
    background: var(--on-masthead);
    color: var(--masthead);
}

.theme-toggle {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    padding: 0;
    border: 1px solid var(--masthead-line);
    border-radius: var(--r-full);
    background: var(--masthead-tint);
    color: var(--on-masthead-muted);
    cursor: pointer;
    transition: color var(--fast) var(--ease), background var(--fast) var(--ease),
        border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.theme-toggle:hover {
    color: var(--on-masthead);
    border-color: rgba(255, 255, 255, 0.34);
    background: rgba(255, 255, 255, 0.16);
}

/* The brand-blue ring disappears against navy — go gold inside the masthead */
.site-header :focus-visible {
    outline-color: var(--gold);
}

.theme-toggle:active {
    transform: scale(0.94);
}

.theme-toggle svg {
    width: 17px;
    height: 17px;
    grid-area: 1 / 1;
    transition: opacity var(--mid) var(--ease), transform var(--mid) var(--ease-out);
}

.theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(-70deg) scale(0.5);
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(70deg) scale(0.5);
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
    opacity: 1;
    transform: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun {
        opacity: 0;
        transform: rotate(70deg) scale(0.5);
    }

    :root:not([data-theme="light"]) .theme-toggle .icon-moon {
        opacity: 1;
        transform: none;
    }
}

/* ── 5. Layout ───────────────────────────────────────────────── */
.page-wrap {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: clamp(24px, 4vw, 44px) clamp(14px, 3vw, 28px) 56px;
}

.workspace {
    display: grid;
    gap: clamp(16px, 2vw, 22px);
    align-items: start;
}

@media (min-width: 1000px) {
    .workspace {
        grid-template-columns: minmax(0, 1fr) 330px;
    }
}

.summary-rail {
    display: grid;
    gap: 16px;
}

@media (min-width: 1000px) {
    .summary-rail {
        position: sticky;
        top: calc(var(--header-h) + 18px);
    }
}

/* ── 6. Hero ─────────────────────────────────────────────────── */
.hero {
    margin-bottom: clamp(22px, 3vw, 34px);
    max-width: 66ch;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    padding: 5px 12px 5px 8px;
    border: 1px solid color-mix(in oklab, var(--brand-500) 26%, transparent);
    border-radius: var(--r-full);
    background: color-mix(in oklab, var(--brand-500) 9%, var(--surface));
    color: var(--brand-ink);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-eyebrow::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--gold) 28%, transparent);
}

.hero h1 {
    font-size: clamp(1.95rem, 1.15rem + 3.1vw, 3.1rem);
    letter-spacing: -0.035em;
    background: linear-gradient(170deg, var(--text) 30%, color-mix(in oklab, var(--text) 62%, var(--brand-500)));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    margin-top: 12px;
    font-size: clamp(0.98rem, 0.93rem + 0.25vw, 1.1rem);
    color: var(--text-muted);
}

/* ── 7. Cards ────────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* The calculator card must not clip the autocomplete dropdown */
.card--open {
    overflow: visible;
}

.stack {
    display: grid;
    gap: clamp(16px, 2vw, 22px);
    margin-top: clamp(16px, 2vw, 22px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 13px clamp(16px, 2.2vw, 22px);
    border-bottom: 1px solid var(--divider);
    border-radius: var(--r-lg) var(--r-lg) 0 0;
    background: var(--surface-2);
    color: var(--text);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.card-header::before {
    content: "";
    width: 3px;
    height: 14px;
    border-radius: var(--r-full);
    background: var(--gold);
}

.card-header .hint {
    margin-left: auto;
    color: var(--text-faint);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: none;
}

.card-body {
    padding: clamp(18px, 2.4vw, 24px);
}

.card-body h4 {
    margin: 0 0 12px;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 700;
}

.card-body h4:not(:first-child) {
    margin-top: 26px;
}

/* ── 8. Course table ─────────────────────────────────────────── */
.transcript-wrap {
    overflow: visible;
}

.transcript-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    counter-reset: courserow;
}

.transcript-table thead th {
    padding: 11px clamp(12px, 1.6vw, 18px);
    border-bottom: 1px solid var(--divider);
    background: var(--surface);
    color: var(--text-faint);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    text-align: left;
    white-space: nowrap;
}

.transcript-table tbody tr {
    counter-increment: courserow;
    border-bottom: 1px solid var(--divider);
    transition: background var(--fast) var(--ease);
}

.transcript-table tbody tr:last-child {
    border-bottom: 0;
}

.transcript-table tbody tr:hover {
    background: var(--hover-tint);
}

.transcript-table tbody tr:focus-within {
    background: var(--active-tint);
}

.transcript-table td {
    padding: 9px clamp(12px, 1.6vw, 18px);
    vertical-align: middle;
}

/* Row number chip lives beside the course field */
.transcript-table td[data-label="Course"] {
    display: flex;
    align-items: center;
    gap: 11px;
}

.transcript-table td[data-label="Course"]::before {
    content: counter(courserow);
    flex-shrink: 0;
    display: grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: var(--r-full);
    background: var(--surface-3);
    color: var(--text-faint);
    font-size: 0.72rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}

.transcript-table tr:focus-within td[data-label="Course"]::before {
    background: var(--brand);
    color: #fff;
}

.transcript-table td[data-label="Course"] .ac-wrap {
    flex: 1;
    min-width: 0;
}

/* Row entrance / exit */
@keyframes row-in {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.transcript-table tbody tr.row-enter {
    animation: row-in var(--mid) var(--ease-out) both;
}

.transcript-table tbody tr.is-leaving {
    opacity: 0;
    transform: translateX(14px);
    transition: opacity var(--fast) var(--ease), transform var(--fast) var(--ease);
}

/* Empty state */
.table-empty {
    display: none;
    padding: 44px 24px;
    text-align: center;
    color: var(--text-faint);
}

.table-empty.is-visible {
    display: block;
}

.table-empty strong {
    display: block;
    margin-bottom: 4px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.table-empty span {
    font-size: 0.87rem;
}

/* ── 9. Form controls ────────────────────────────────────────── */
.course-input,
.grade-select,
.credits-input {
    width: 100%;
    min-height: 40px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    background: var(--surface-inset);
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease),
        background var(--fast) var(--ease);
}

.course-input::placeholder,
.credits-input::placeholder {
    color: var(--text-faint);
}

.course-input:hover,
.grade-select:hover,
.credits-input:hover {
    border-color: var(--border-strong);
}

.course-input:focus,
.grade-select:focus,
.credits-input:focus {
    outline: none;
    border-color: var(--brand-500);
    box-shadow: 0 0 0 3px var(--ring);
}

.credits-input {
    width: 74px;
    margin: 0 auto;
    padding-inline: 8px;
    font-weight: 650;
    font-variant-numeric: tabular-nums;
    text-align: center;
    display: block;
}

/* Custom select chevron (inline SVG, no network) */
.grade-select {
    -webkit-appearance: none;
    appearance: none;
    padding-right: 30px;
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%2355677f' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6.5 8 10.5 12 6.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 9px center;
    background-size: 15px;
    cursor: pointer;
}

:root[data-theme="dark"] .grade-select {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%239dadc6' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6.5 8 10.5 12 6.5'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .grade-select {
        background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%239dadc6' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6.5 8 10.5 12 6.5'/%3E%3C/svg%3E");
    }
}

.grade-select option {
    background: var(--surface);
    color: var(--text);
}

/* Grade-point pill */
.grade-points {
    display: inline-grid;
    place-items: center;
    min-width: 34px;
    height: 26px;
    margin: 0 auto;
    padding: 0 8px;
    border: 1px solid var(--border);
    border-radius: var(--r-full);
    background: var(--surface-3);
    color: var(--text-faint);
    font-size: 0.83rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease),
        background var(--fast) var(--ease);
}

td[data-label="GP"] {
    text-align: center;
}

.grade-points[data-points="5"] {
    color: var(--g-hd);
    border-color: color-mix(in oklab, var(--g-hd) 40%, transparent);
    background: color-mix(in oklab, var(--g-hd) 12%, transparent);
}

.grade-points[data-points="4"] {
    color: var(--g-di);
    border-color: color-mix(in oklab, var(--g-di) 40%, transparent);
    background: color-mix(in oklab, var(--g-di) 12%, transparent);
}

.grade-points[data-points="3"] {
    color: var(--g-cr);
    border-color: color-mix(in oklab, var(--g-cr) 40%, transparent);
    background: color-mix(in oklab, var(--g-cr) 12%, transparent);
}

.grade-points[data-points="2"] {
    color: var(--g-pa);
    border-color: color-mix(in oklab, var(--g-pa) 40%, transparent);
    background: color-mix(in oklab, var(--g-pa) 12%, transparent);
}

.grade-points[data-points="1"] {
    color: var(--g-cp);
    border-color: color-mix(in oklab, var(--g-cp) 40%, transparent);
    background: color-mix(in oklab, var(--g-cp) 12%, transparent);
}

.grade-points[data-points="0"] {
    color: var(--g-f);
    border-color: color-mix(in oklab, var(--g-f) 40%, transparent);
    background: color-mix(in oklab, var(--g-f) 12%, transparent);
}

/* ── 10. Autocomplete ────────────────────────────────────────── */
.ac-wrap {
    position: relative;
}

.ac-list {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 10001;
    margin: 0;
    padding: 6px;
    list-style: none;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-lg);
    max-height: 306px;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    animation: ac-in 0.16s var(--ease-out) both;
}

@supports (backdrop-filter: blur(1px)) {
    .ac-list {
        background: color-mix(in oklab, var(--surface) 92%, transparent);
        backdrop-filter: blur(14px) saturate(160%);
    }
}

@keyframes ac-in {
    from {
        opacity: 0;
        transform: translateY(-5px) scale(0.985);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.ac-list::-webkit-scrollbar {
    width: 9px;
}

.ac-list::-webkit-scrollbar-thumb {
    border: 3px solid transparent;
    border-radius: var(--r-full);
    background: var(--border-strong);
    background-clip: content-box;
}

.ac-item {
    display: flex;
    align-items: baseline;
    gap: 9px;
    padding: 8px 11px;
    border-radius: var(--r-sm);
    color: var(--text);
    font-size: 0.87rem;
    cursor: pointer;
    transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}

.ac-code {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 0.79rem;
    font-weight: 600;
    color: var(--brand-600);
}

.ac-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ac-credits {
    flex-shrink: 0;
    color: var(--text-faint);
    font-size: 0.74rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.ac-item mark {
    padding: 0 1px;
    border-radius: 3px;
    background: color-mix(in oklab, var(--gold) 45%, transparent);
    color: inherit;
    font-weight: 700;
}

.ac-item.is-active,
.ac-item:hover {
    background: var(--brand);
    color: #fff;
}

.ac-item.is-active .ac-code,
.ac-item:hover .ac-code,
.ac-item.is-active .ac-credits,
.ac-item:hover .ac-credits {
    color: color-mix(in oklab, #fff 78%, transparent);
}

.ac-item.is-active mark,
.ac-item:hover mark {
    background: color-mix(in oklab, var(--gold) 70%, transparent);
    color: #10233d;
}

.ac-item-muted {
    display: block;
    color: var(--text-faint);
    cursor: default;
    font-style: italic;
}

.ac-item-muted:hover {
    background: transparent;
    color: var(--text-faint);
}

/* ── 11. Buttons ─────────────────────────────────────────────── */
.action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding: 14px clamp(16px, 2.2vw, 22px);
    border-top: 1px solid var(--divider);
    background: var(--surface-2);
    border-radius: 0 0 var(--r-lg) var(--r-lg);
}

.action-right {
    display: flex;
    gap: 8px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 42px;
    padding: 10px 20px;
    border: 1px solid transparent;
    border-radius: var(--r-sm);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 650;
    letter-spacing: -0.005em;
    white-space: nowrap;
    cursor: pointer;
    transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease),
        box-shadow var(--fast) var(--ease), transform var(--fast) var(--ease), color var(--fast) var(--ease);
}

.btn:active {
    transform: translateY(1px);
}

.btn svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

.btn-add {
    background: var(--surface);
    color: var(--brand-600);
    border-color: var(--border-strong);
    border-style: dashed;
}

.btn-add:hover {
    background: var(--hover-tint);
    border-color: var(--brand-500);
    border-style: solid;
}

.btn-calculate {
    background: linear-gradient(180deg, var(--brand-600), var(--brand));
    color: #fff;
    box-shadow: var(--shadow-brand);
}

.btn-calculate:hover {
    background: linear-gradient(180deg, var(--brand-500), var(--brand-600));
    box-shadow: 0 8px 26px color-mix(in oklab, var(--brand-600) 40%, transparent);
}

.btn-clear {
    background: transparent;
    color: var(--danger);
    border-color: color-mix(in oklab, var(--danger) 32%, transparent);
}

.btn-clear:hover {
    background: var(--danger-soft);
    border-color: var(--danger);
}

.btn-ghost {
    background: var(--surface-2);
    color: var(--text-muted);
    border-color: var(--border);
}

.btn-ghost:hover {
    background: var(--surface-3);
    color: var(--text);
    border-color: var(--border-strong);
}

.kbd-hint {
    display: inline-block;
    margin-left: 2px;
    padding: 1px 5px;
    border: 1px solid color-mix(in oklab, currentColor 30%, transparent);
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 0.68em;
    font-weight: 600;
    opacity: 0.8;
}

/* Remove-row button */
.btn-remove {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    margin-left: auto;
    padding: 0;
    border: 1px solid transparent;
    border-radius: var(--r-xs);
    background: transparent;
    color: var(--text-faint);
    cursor: pointer;
    transition: background var(--fast) var(--ease), color var(--fast) var(--ease),
        border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.btn-remove svg {
    width: 15px;
    height: 15px;
}

.btn-remove:hover {
    background: var(--danger-soft);
    border-color: color-mix(in oklab, var(--danger) 30%, transparent);
    color: var(--danger);
}

.btn-remove:active {
    transform: scale(0.9);
}

/* ── 12. Result / summary ────────────────────────────────────── */
.result-panel {
    position: relative;
    padding: 26px 22px 20px;
    overflow: hidden;
    background:
        radial-gradient(120% 90% at 50% -20%, color-mix(in oklab, var(--brand-500) 42%, transparent), transparent 62%),
        linear-gradient(165deg, var(--brand-600), var(--brand) 62%, #001c39);
    color: #fff;
    text-align: center;
}

.result-panel::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(60% 40% at 82% 108%, color-mix(in oklab, var(--gold) 22%, transparent), transparent 70%);
}

.result-dial {
    position: relative;
    display: grid;
    place-items: center;
    width: 168px;
    height: 168px;
    margin: 0 auto 14px;
}

.result-dial svg {
    grid-area: 1 / 1;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.dial-track {
    fill: none;
    stroke: rgba(255, 255, 255, 0.14);
    stroke-width: 9;
}

.dial-fill {
    fill: none;
    stroke: url(#dialGrad);
    stroke-width: 9;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--slow) var(--ease-out);
}

.dial-center {
    grid-area: 1 / 1;
    display: grid;
    gap: 1px;
    place-items: center;
}

.result-value {
    font-family: var(--font-num);
    font-size: 3.05rem;
    font-weight: 750;
    line-height: 1;
    letter-spacing: -0.045em;
    font-variant-numeric: tabular-nums;
    color: var(--gold);
    text-shadow: 0 2px 18px color-mix(in oklab, var(--gold) 35%, transparent);
}

.result-value.is-empty {
    color: rgba(255, 255, 255, 0.35);
    text-shadow: none;
}

.result-scale {
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    color: rgba(255, 255, 255, 0.5);
}

.result-label {
    position: relative;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.66);
}

.result-band {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: 12px;
    padding: 5px 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--r-full);
    background: rgba(255, 255, 255, 0.09);
    font-size: 0.79rem;
    font-weight: 650;
    color: #fff;
}

.result-band::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--band-color, var(--gold));
    box-shadow: 0 0 0 3px color-mix(in oklab, var(--band-color, var(--gold)) 30%, transparent);
}

/* Subgrid keeps the values on one baseline even when a label wraps */
.result-stats {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto auto;
    gap: 1px;
    margin: 20px 0 0;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.result-stats div {
    display: grid;
    grid-row: span 2;
    grid-template-rows: subgrid;
    align-content: start;
    padding: 0 4px;
}

.result-stats div + div {
    border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.result-stats dt {
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.result-stats dd {
    margin: 3px 0 0;
    font-size: 1.15rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: #fff;
}

.summary-foot {
    padding: 12px 18px;
    border-top: 1px solid var(--divider);
    background: var(--surface-2);
    color: var(--text-faint);
    font-size: 0.74rem;
    line-height: 1.5;
    text-align: center;
}

/* Grade distribution mini-chart */
.dist-list {
    display: grid;
    gap: 9px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.dist-row {
    display: grid;
    grid-template-columns: 30px 1fr 34px;
    align-items: center;
    gap: 10px;
    font-size: 0.78rem;
}

.dist-grade {
    font-weight: 700;
    color: var(--grade-color, var(--text-muted));
}

.dist-bar {
    height: 7px;
    border-radius: var(--r-full);
    background: var(--surface-3);
    overflow: hidden;
}

.dist-bar span {
    display: block;
    height: 100%;
    border-radius: var(--r-full);
    background: var(--grade-color, var(--brand-500));
    transform-origin: left;
    animation: bar-in var(--slow) var(--ease-out) both;
}

@keyframes bar-in {
    from {
        transform: scaleX(0);
    }

    to {
        transform: scaleX(1);
    }
}

.dist-count {
    color: var(--text-faint);
    font-weight: 650;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.dist-empty {
    margin: 0;
    color: var(--text-faint);
    font-size: 0.83rem;
    text-align: center;
}

/* ── 13. Toast notice ────────────────────────────────────────── */
.form-notice {
    position: fixed;
    left: 50%;
    bottom: 24px;
    z-index: 200;
    display: flex;
    align-items: flex-start;
    gap: 11px;
    width: min(440px, calc(100vw - 28px));
    padding: 13px 16px;
    border: 1px solid var(--warn-line);
    border-radius: var(--r-md);
    background: var(--warn-soft);
    color: var(--warn);
    font-size: 0.87rem;
    line-height: 1.5;
    box-shadow: var(--shadow-lg);
    transform: translate(-50%, calc(100% + 34px));
    opacity: 0;
    visibility: hidden;
    transition: transform var(--mid) var(--ease-out), opacity var(--mid) var(--ease),
        visibility var(--mid);
}

@supports (backdrop-filter: blur(1px)) {
    .form-notice {
        background: color-mix(in oklab, var(--warn-soft) 88%, transparent);
        backdrop-filter: blur(14px) saturate(160%);
    }
}

.form-notice.is-visible {
    transform: translate(-50%, 0);
    opacity: 1;
    visibility: visible;
}

.form-notice::before {
    content: "!";
    flex-shrink: 0;
    display: grid;
    place-items: center;
    width: 19px;
    height: 19px;
    margin-top: 1px;
    border-radius: 50%;
    background: currentColor;
    color: var(--warn-soft);
    font-size: 0.74rem;
    font-weight: 800;
}

.form-notice .notice-action {
    margin-left: auto;
    padding: 3px 10px;
    border: 1px solid currentColor;
    border-radius: var(--r-full);
    background: transparent;
    color: inherit;
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--fast) var(--ease);
}

.form-notice .notice-action:hover {
    background: color-mix(in oklab, currentColor 14%, transparent);
}

/* ── 14. Dialog ──────────────────────────────────────────────── */
.modal {
    width: min(400px, calc(100vw - 32px));
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow-lg);
}

.modal::backdrop {
    background: rgba(6, 12, 24, 0.55);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.modal[open] {
    animation: modal-in var(--mid) var(--ease-out) both;
}

@keyframes modal-in {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.modal-body {
    padding: 24px 24px 6px;
}

.modal-body h2 {
    margin: 0 0 8px;
    font-size: 1.12rem;
}

.modal-body p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 9px;
    padding: 18px 24px 20px;
}

/* ── 15. Notes, formula, badges ──────────────────────────────── */
.formula-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 18px 16px;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    background: var(--surface-2);
    color: var(--text);
    font-size: 0.98rem;
    text-align: center;
}

.fraction {
    display: inline-block;
    vertical-align: middle;
    text-align: center;
}

.fraction .numer {
    display: block;
    padding: 0 12px 5px;
    border-bottom: 1.5px solid var(--border-strong);
}

.fraction .denom {
    display: block;
    padding: 5px 12px 0;
}

.note-text {
    margin: 0 0 14px;
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.75;
}

.card-body .note-text:last-child {
    margin-bottom: 0;
}

.grade-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px 6px 13px;
    border: 1px solid color-mix(in oklab, var(--badge-color, var(--border-strong)) 34%, transparent);
    border-radius: var(--r-full);
    background: color-mix(in oklab, var(--badge-color, var(--surface-3)) 10%, transparent);
    color: var(--badge-color, var(--text));
    font-size: 0.83rem;
    font-weight: 700;
}

.badge-points {
    display: grid;
    place-items: center;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    border-radius: var(--r-full);
    background: color-mix(in oklab, var(--badge-color, var(--brand)) 18%, transparent);
    font-size: 0.76rem;
    font-variant-numeric: tabular-nums;
}

/* Feature grid (about page) */
.feature-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.feature {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    background: var(--surface-2);
    transition: border-color var(--mid) var(--ease), transform var(--mid) var(--ease-out),
        box-shadow var(--mid) var(--ease);
}

.feature:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    margin-bottom: 12px;
    border-radius: var(--r-sm);
    background: color-mix(in oklab, var(--brand-500) 14%, transparent);
    color: var(--brand-600);
}

.feature-icon svg {
    width: 18px;
    height: 18px;
}

.feature h4 {
    margin: 0 0 5px;
    font-size: 0.94rem;
}

.feature p {
    color: var(--text-muted);
    font-size: 0.86rem;
    line-height: 1.6;
}

.btn-email {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 10px 20px;
    border: 1px solid var(--border-strong);
    border-radius: var(--r-sm);
    background: var(--surface-2);
    color: var(--text);
    font-size: 0.88rem;
    font-weight: 650;
    text-decoration: none;
    transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease),
        transform var(--fast) var(--ease);
}

.btn-email:hover {
    background: var(--hover-tint);
    border-color: var(--brand-500);
    color: var(--text);
    transform: translateY(-1px);
}

.btn-email svg {
    width: 16px;
    height: 16px;
}

/* ── 16. Footer ──────────────────────────────────────────────── */
.site-footer {
    margin-top: clamp(28px, 4vw, 44px);
    padding-top: 22px;
    border-top: 3px solid var(--gold);
    color: var(--text-faint);
    font-size: 0.84rem;
    line-height: 1.7;
    text-align: center;
}

/* Institutional sign-off: crest, university name, affiliation status */
.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
    text-align: left;
}

.footer-brand .brand-mark {
    width: 34px;
    height: 34px;
}

.footer-institution {
    display: block;
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.footer-unit {
    display: block;
    color: var(--text-muted);
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.site-footer p {
    margin: 0;
}

.site-footer strong {
    color: var(--text-muted);
}

.site-footer .disclaimer {
    display: inline-block;
    max-width: 62ch;
    margin-bottom: 10px;
    padding: 7px 14px;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    background: var(--surface-2);
    color: var(--text-muted);
    font-size: 0.76rem;
    line-height: 1.55;
}

.site-footer .disclaimer strong {
    color: var(--text);
}

/* ── 17. Responsive ──────────────────────────────────────────── */
@media (max-width: 720px) {
    .header-inner {
        flex-wrap: wrap;
        padding-block: 10px;
        gap: 10px;
    }

    .brand-institution {
        font-size: 0.58rem;
        letter-spacing: 0.1em;
    }

    .brand-tool {
        font-size: 0.95rem;
    }

    .site-nav {
        order: 3;
        width: 100%;
        justify-content: space-between;
    }

    .nav-link {
        flex: 1;
        padding-inline: 8px;
        text-align: center;
        font-size: 0.8rem;
    }
}

@media (max-width: 640px) {
    /* The table becomes one card per course */
    .transcript-table thead {
        display: none;
    }

    .transcript-table tbody tr {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        margin: 10px 12px;
        padding: 4px 0 8px;
        border: 1px solid var(--border);
        border-radius: var(--r-md);
        background: var(--surface-2);
    }

    .transcript-table tbody tr:last-child {
        border-bottom: 1px solid var(--border);
    }

    .transcript-table td {
        display: block;
        padding: 6px 12px;
        border: none;
    }

    .transcript-table td[data-label="Course"] {
        flex: 0 0 100%;
        padding-top: 10px;
    }

    .transcript-table td[data-label="Credits"],
    .transcript-table td[data-label="GP"] {
        display: flex;
        align-items: center;
        gap: 7px;
        flex: 0 0 auto;
        font-size: 0.78rem;
        color: var(--text-faint);
        font-weight: 650;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }

    .transcript-table td[data-label="Credits"]::before {
        content: "Credits";
    }

    .transcript-table td[data-label="GP"]::before {
        content: "Points";
    }

    .credits-input {
        width: 62px;
        margin: 0;
    }

    .transcript-table td[data-label="Grade"] {
        flex: 1 1 120px;
        min-width: 110px;
    }

    .transcript-table td[data-label="Action"] {
        flex: 0 0 auto;
        margin-left: auto;
    }

    .action-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .action-right {
        flex-direction: column-reverse;
        gap: 8px;
    }

    .btn {
        width: 100%;
    }

    .kbd-hint {
        display: none;
    }

    .result-dial {
        width: 152px;
        height: 152px;
    }

    .result-value {
        font-size: 2.7rem;
    }

    .form-notice {
        bottom: 14px;
    }
}

@media (max-width: 430px) {
    /* Not enough room for the header hint beside the label */
    .card-header .hint {
        display: none;
    }
}

/* ── 18. Motion & print ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}

@media print {
    body::before,
    .action-bar,
    .btn-remove,
    .form-notice,
    .modal,
    .skip-link,
    .table-empty,
    .site-nav,
    .theme-toggle {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    /* The masthead prints as a letterhead so a printed record is identifiable */
    .site-header {
        position: static;
        background: #fff !important;
        color: #000;
        border-bottom: 2px solid #000;
        box-shadow: none;
    }

    .header-inner {
        padding-inline: 0;
        min-height: 0;
        padding-block: 0 10px;
    }

    .header-brand,
    .brand-institution {
        color: #000;
    }

    .site-footer {
        border-top-color: #000;
    }

    .card {
        break-inside: avoid;
        border: 1px solid #ccc;
        box-shadow: none;
    }

    .result-panel {
        background: #fff !important;
        color: #000 !important;
        border: 1px solid #ccc;
    }

    .result-value,
    .result-label,
    .result-stats dt,
    .result-stats dd,
    .result-band {
        color: #000 !important;
        text-shadow: none !important;
    }

    .workspace {
        display: block;
    }
}