:root {
    --bg: #0f172a;
    --bg-alt: #1e293b;
    --accent: #38bdf8;
    --accent-strong: #0ea5e9;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --card: rgba(15, 23, 42, 0.85);
    --shadow: 0 30px 60px -20px rgba(2, 6, 23, 0.6);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, sans-serif;
    background: radial-gradient(circle at top, #1e3a8a 0%, #0f172a 60%);
    color: var(--text);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: 'Fira Code', monospace;
    margin-top: 0;
    color: #f8fafc;
}

a {
    color: inherit;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    align-items: center;
    gap: 3rem;
    padding: 6rem min(10vw, 6rem);
    background: linear-gradient(135deg, rgba(8, 47, 73, 0.9), rgba(30, 64, 175, 0.55));
    position: relative;
    overflow: hidden;
}

.hero__content h1 {
    font-size: clamp(3rem, 8vw, 4.5rem);
}

.hero__content p {
    font-size: 1.2rem;
    max-width: 40ch;
}

.cta {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.9rem 2rem;
    background: var(--accent);
    color: #0f172a;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 30px -15px rgba(14, 165, 233, 0.7);
}

.hero__visual {
    justify-self: center;
}

.matrix {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.6rem;
    padding: 2rem;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 1.5rem;
    box-shadow: var(--shadow);
    font-family: 'Fira Code', monospace;
    text-align: center;
    letter-spacing: 0.1em;
}

main {
    padding: 4rem min(10vw, 6rem);
    display: grid;
    gap: 4rem;
}

section {
    background: rgba(15, 23, 42, 0.55);
    padding: 2.5rem;
    border-radius: 1.8rem;
    box-shadow: var(--shadow);
}

section > p {
    color: var(--muted);
    max-width: 65ch;
}

.why__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.why__grid article {
    background: var(--card);
    border-radius: 1.2rem;
    padding: 1.8rem;
    border: 1px solid rgba(148, 163, 184, 0.12);
}

.section-header {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: space-between;
    align-items: center;
}

.language-switch {
    display: inline-flex;
    background: var(--bg);
    border-radius: 999px;
    padding: 0.4rem;
}

.language-switch__btn {
    border: none;
    background: transparent;
    color: var(--muted);
    font-family: 'Fira Code', monospace;
    padding: 0.5rem 1.3rem;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.language-switch__btn.is-active {
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
}

.type-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.type-card {
    background: var(--card);
    border-radius: 1.2rem;
    padding: 1.8rem;
    border: 1px solid rgba(56, 189, 248, 0.15);
    display: grid;
    gap: 0.75rem;
}

.type-card code {
    font-family: 'Fira Code', monospace;
    background: rgba(15, 23, 42, 0.7);
    padding: 0.4rem 0.6rem;
    border-radius: 0.6rem;
    color: var(--accent);
}

.type-card[hidden] {
    display: none;
}

.timeline {
    display: grid;
    gap: 1.5rem;
    margin: 2rem 0;
}

.timeline__item {
    padding: 1.5rem;
    border-radius: 1.3rem;
    background: var(--bg-alt);
    border-left: 4px solid var(--accent);
}

textarea#notes {
    width: 100%;
    min-height: 160px;
    border-radius: 1.2rem;
    border: 1px solid rgba(148, 163, 184, 0.3);
    padding: 1.2rem;
    background: rgba(15, 23, 42, 0.75);
    color: var(--text);
    font-family: 'Fira Code', monospace;
    resize: vertical;
}

.simulator__form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.2rem;
    margin-top: 2rem;
}

.simulator__form label {
    display: grid;
    gap: 0.6rem;
    font-weight: 600;
}

.simulator__form select,
.simulator__form input {
    padding: 0.8rem;
    border-radius: 0.8rem;
    border: 1px solid rgba(148, 163, 184, 0.25);
    background: var(--bg-alt);
    color: var(--text);
    font-family: 'Fira Code', monospace;
}

.simulator__form button {
    grid-column: 1 / -1;
    padding: 0.9rem 1.4rem;
    border-radius: 0.9rem;
    border: none;
    background: var(--accent-strong);
    color: #0f172a;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.simulator__form button:hover {
    transform: translateY(-3px);
}

.simulator__output {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: 1.2rem;
    background: var(--bg-alt);
    border: 1px solid rgba(14, 165, 233, 0.2);
    min-height: 80px;
    display: grid;
    gap: 0.8rem;
}

.simulator__output code {
    background: rgba(15, 23, 42, 0.8);
    padding: 0.6rem 0.9rem;
    border-radius: 0.8rem;
    font-family: 'Fira Code', monospace;
    color: #facc15;
}

.simulator__output--error {
    border-color: rgba(248, 113, 113, 0.6);
    color: #fecdd3;
}

.assignments__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.assignment {
    background: var(--card);
    padding: 1.8rem;
    border-radius: 1.2rem;
    border: 1px solid rgba(56, 189, 248, 0.12);
}

.quiz__container {
    display: grid;
    gap: 1.2rem;
    margin: 2rem 0;
}

.quiz__question {
    background: var(--card);
    padding: 1.5rem;
    border-radius: 1.2rem;
    border: 1px solid rgba(56, 189, 248, 0.1);
}

.quiz__options {
    display: grid;
    gap: 0.6rem;
    margin-top: 1rem;
}

.quiz__options label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg-alt);
    padding: 0.6rem 0.9rem;
    border-radius: 0.8rem;
}

.quiz__result {
    font-weight: 700;
    color: var(--accent);
}

footer.footer {
    text-align: center;
    padding: 2rem;
    color: var(--muted);
    background: rgba(15, 23, 42, 0.8);
}

@media (max-width: 720px) {
    main {
        padding: 3rem 1.5rem;
    }

    section {
        padding: 2rem;
    }

    .hero {
        padding: 4rem 1.5rem;
    }
}

/* ===== Programmering Trin-for-Trin Theme Override ===== */
:root {
    --bg: #f8f1e6;
    --bg-alt: #efe1cc;
    --accent: #d76c2a;
    --accent-strong: #1d6c8f;
    --text: #1f1c17;
    --muted: #3d352b;
    --card: #fff8ef;
    --shadow: 0 26px 54px -34px rgba(28, 20, 12, 0.3);
    --line: rgba(31, 28, 23, 0.16);
}

body {
    font-family: "Trebuchet MS", "Verdana", "Geneva", sans-serif;
    background: radial-gradient(circle at top, #f8f1e6 0%, #f2e7d4 62%);
    color: var(--text);
}

h1, h2, h3 {
    font-family: "Palatino", "Book Antiqua", "Times New Roman", serif;
    color: var(--text);
}

.hero {
    background: linear-gradient(145deg, #efe2cd, #f8f1e6);
}

.cta {
    background: var(--accent);
    color: #fff8ef;
}

.cta:hover {
    box-shadow: 0 18px 30px -20px rgba(215, 108, 42, 0.6);
}

.matrix {
    background: rgba(255, 248, 239, 0.7);
    border: 1px solid var(--line);
    color: var(--muted);
}

section {
    background: linear-gradient(140deg, var(--card), #fef4e2);
    border: 1px solid var(--line);
}

section > p {
    color: var(--muted);
}

.why__grid article,
.type-card,
.assignment,
.quiz__question {
    border: 1px solid var(--line);
}

.type-card code,
.simulator__output code {
    background: #10100f;
    color: #f9f4e7;
}

.language-switch {
    background: rgba(255, 248, 239, 0.85);
    border: 1px solid var(--line);
}

.language-switch__btn {
    color: var(--muted);
    font-family: "Fira Code", "Consolas", "Courier New", monospace;
}

.language-switch__btn.is-active {
    background: #1d6c8f;
    color: #fff8ef;
}

.timeline__item,
.quiz__options label,
.simulator__form select,
.simulator__form input,
textarea#notes,
.simulator__output {
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.6);
    color: var(--text);
}

.simulator__form select,
.simulator__form input,
textarea#notes {
    font-family: "Fira Code", "Consolas", "Courier New", monospace;
}

.simulator__form button {
    background: var(--accent-strong);
    color: #fff8ef;
}

.simulator__output--error {
    color: #8f3030;
}

.quiz__result {
    color: var(--accent-strong);
}

footer.footer {
    color: var(--muted);
    background: rgba(255, 248, 239, 0.75);
    border-top: 1px solid var(--line);
}