/* ============================================================
   Quale.dev — Styles
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #0a0a0f;
    --color-bg-raised: #12121a;
    --color-bg-card: #16161f;
    --color-bg-code: #0d0d14;
    --color-border: #1e1e2e;
    --color-border-subtle: #161622;
    --color-text: #e2e2e8;
    --color-text-muted: #8888a0;
    --color-text-dim: #55556a;
    --color-accent: #6c5ce7;
    --color-accent-glow: rgba(108, 92, 231, 0.15);
    --color-accent-bright: #a29bfe;
    --color-green: #00b894;
    --color-green-dim: rgba(0, 184, 148, 0.12);
    --color-red: #e17055;
    --color-orange: #f0932b;
    --color-cyan: #81ecec;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --container: 1120px;
    --radius: 8px;
    --radius-lg: 12px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--color-accent-bright);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #fff;
}

img {
    max-width: 100%;
    display: block;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

.btn--primary {
    background: var(--color-accent);
    color: #fff;
}

.btn--primary:hover {
    background: #7c6ef0;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--color-accent-glow);
}

.btn--secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn--secondary:hover {
    border-color: var(--color-accent);
    color: #fff;
    transform: translateY(-1px);
}

/* --- Section Titles --- */
.section__title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 640px;
    margin-bottom: 48px;
}

/* --- Nav --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.95);
    border-bottom: 1px solid var(--color-border-subtle);
    transition: background 0.3s;
}

@supports (backdrop-filter: blur(16px)) or (-webkit-backdrop-filter: blur(16px)) {
    .nav {
        background: rgba(10, 10, 15, 0.8);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
    }
}

.nav__inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 600;
    font-size: 1.1rem;
}

.nav__logo:hover {
    color: #fff;
}

.nav__logo-mark {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav__links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav__links a:hover {
    color: #fff;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s;
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    opacity: 0.4;
}

.hero__content {
    position: relative;
    max-width: 800px;
    text-align: center;
}

.hero__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent-bright);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 20px;
}

.hero__title {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero__accent {
    background: linear-gradient(135deg, var(--color-accent-bright), var(--color-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
}

.hero__proof {
    display: flex;
    gap: 48px;
    justify-content: center;
}

.hero__stat {
    text-align: center;
}

.hero__stat-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.02em;
}

.hero__stat-label {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- Paradigm --- */
.paradigm {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.paradigm__comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: start;
}

.paradigm__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.paradigm__card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-mono);
}

.paradigm__card--old h3 {
    color: var(--color-text-dim);
}

.paradigm__card--new h3 {
    color: var(--color-accent-bright);
}

.paradigm__card--new {
    border-color: rgba(108, 92, 231, 0.3);
    box-shadow: 0 0 40px var(--color-accent-glow);
}

.paradigm__card pre {
    background: var(--color-bg-code);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    overflow-x: auto;
    font-size: 0.85rem;
    line-height: 1.6;
    border: 1px solid var(--color-border-subtle);
}

.paradigm__traits {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.paradigm__traits li {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    padding-left: 20px;
    position: relative;
}

.paradigm__card--old .paradigm__traits li::before {
    content: "\00d7";
    position: absolute;
    left: 0;
    color: var(--color-red);
    font-weight: 700;
}

.paradigm__card--new .paradigm__traits li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--color-green);
    font-weight: 700;
}

.paradigm__divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 120px;
}

.paradigm__divider span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* --- How It Works --- */
.how {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.how__steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}

.how__step {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    position: relative;
}

.how__step-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.how__step-number {
    width: 36px;
    height: 36px;
    min-width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    border-radius: 50%;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
}

.how__step h3 {
    font-size: 1.05rem;
    margin: 0;
}

.how__step p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    margin: 0;
}

/* Arrow connectors between cards */
.how__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -14px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 6px solid var(--color-accent);
    z-index: 1;
}

.how__connector {
    display: none;
}

/* --- Origin / Inspiration --- */
.origin {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.origin__layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 64px;
    align-items: center;
}

.origin__text p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 16px;
}

.origin__visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.origin__icon {
    width: 240px;
    height: 240px;
    opacity: 0.15;
    transition: opacity 0.3s;
}

.origin__icon:hover {
    opacity: 0.25;
}

.origin__text strong {
    color: #fff;
}

.origin__citation {
    font-size: 0.85rem !important;
    color: var(--color-text-dim) !important;
    margin-top: 24px !important;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-subtle);
}

.origin__citation em {
    color: var(--color-text-muted);
}

.origin__citation a {
    color: var(--color-accent-bright);
}

/* --- Before/After Evolution --- */
.before-after {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.before-after__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.before-after__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
}

.before-after__label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 14px;
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-block;
}

.before-after__label--gen0 {
    background: rgba(225, 112, 85, 0.15);
    color: var(--color-red);
}

.before-after__label--gen50 {
    background: rgba(240, 147, 43, 0.15);
    color: var(--color-orange);
}

.before-after__label--gen200 {
    background: rgba(108, 92, 231, 0.15);
    color: var(--color-accent-bright);
}

.before-after__label--gen500 {
    background: rgba(0, 184, 148, 0.15);
    color: var(--color-green);
}

.before-after__desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}


/* --- Results --- */
.results {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.results__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.results__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.results__card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.results__card p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.results__docs-link {
    text-align: center;
    margin-top: 40px;
}

.results__docs-link .btn {
    gap: 10px;
}

/* --- Evolution Chart --- */
.evolution-viz {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.evolution-viz__phases {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.evolution-viz__phase-tab {
    padding: 10px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.evolution-viz__phase-tab:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

.evolution-viz__phase-tab--active {
    background: rgba(108, 92, 231, 0.12);
    border-color: var(--color-accent);
    color: var(--color-accent-bright);
}

.evolution-viz__summary {
    margin-top: 16px;
    display: flex;
    gap: 32px;
}

.evolution-viz__summary p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    flex: 1;
}

.evolution-viz__summary strong {
    color: var(--color-text);
}

.evolution-viz__chart {
    position: relative;
    height: 320px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
}

.evolution-viz__chart canvas {
    width: 100%;
    height: 100%;
}

.evolution-viz__labels {
    position: absolute;
    bottom: 8px;
    left: 24px;
    right: 24px;
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-dim);
}

.evolution-viz__legend {
    display: flex;
    gap: 24px;
    justify-content: center;
}

.evolution-viz__legend-item {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    display: flex;
    align-items: center;
    gap: 8px;
}

.evolution-viz__legend-item::before {
    content: "";
    display: block;
    width: 24px;
    height: 3px;
    border-radius: 2px;
}

.evolution-viz__legend-item--best::before {
    background: var(--color-accent-bright);
}

.evolution-viz__legend-item--avg::before {
    background: var(--color-text-dim);
}

/* --- Applications --- */
.applications {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.applications__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.applications__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: border-color 0.3s, transform 0.2s;
}

.applications__card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.applications__icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent-bright);
    margin-bottom: 16px;
}

.applications__card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.applications__card p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* --- Language --- */
.language {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

/* --- Scenario Tabs --- */
.language__scenario-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.language__scenario-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.language__scenario-tab svg {
    width: 16px;
    height: 16px;
}

.language__scenario-tab:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

.language__scenario-tab--active {
    background: rgba(108, 92, 231, 0.12);
    border-color: var(--color-accent);
    color: var(--color-accent-bright);
}

.language__examples {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 24px;
}

.language__example {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.language__tab-bar {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    padding: 0 16px;
}

.language__tab {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    padding: 10px 8px;
    border-bottom: 2px solid transparent;
}

.language__tab--active {
    color: var(--color-accent-bright);
    border-bottom-color: var(--color-accent);
}

.language__code {
    padding: 20px;
    overflow-x: hidden;
    overflow-y: auto;
    font-size: 0.78rem;
    line-height: 1.6;
    background: var(--color-bg-code);
    margin: 0;
    flex: 1;
    white-space: pre;
    word-break: keep-all;
}

.code-comment { color: var(--color-text-dim); font-style: italic; }

.language__cli {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.language__code--terminal {
    background: #0c0c12;
}

/* --- Code Highlighting --- */
.code-kw { color: var(--color-accent-bright); }
.code-type { color: var(--color-cyan); }
.code-num { color: var(--color-orange); }
.code-val { color: var(--color-green); }
.code-prompt { color: var(--color-green); user-select: none; }
.code-output { color: var(--color-text-dim); }

/* --- Philosophy --- */
.philosophy {
    padding: 120px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.philosophy__content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.philosophy__title {
    font-size: 2rem;
    margin-bottom: 24px;
}

.philosophy__content p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 16px;
}

.philosophy__content em {
    color: var(--color-text);
    font-style: italic;
}

.philosophy__content strong {
    color: #fff;
}

/* --- CTA --- */
.cta {
    padding: 120px 0;
    text-align: center;
    border-top: 1px solid var(--color-border-subtle);
    background: linear-gradient(180deg, transparent, var(--color-accent-glow));
}

.cta__title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.cta__subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.cta__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* --- Footer --- */
.footer {
    padding: 24px 0;
    border-top: 1px solid var(--color-border-subtle);
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer__brand {
    display: flex;
    align-items: center;
}

.footer__logo {
    height: 100px;
    width: auto;
    object-fit: contain;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.footer__logo:hover {
    opacity: 1;
}

.footer__links {
    display: flex;
    gap: 24px;
}

.footer__links a {
    font-size: 0.85rem;
    color: var(--color-text-dim);
}

.footer__links a:hover {
    color: #fff;
}

.footer__copy {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

/* --- Focus Styles --- */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .paradigm__comparison {
        grid-template-columns: 1fr;
    }

    .paradigm__divider {
        padding-top: 0;
        padding: 8px 0;
    }

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

    .how__step:not(:last-child)::after {
        display: none;
    }

    .language__examples {
        grid-template-columns: 1fr;
    }

    .results__grid {
        grid-template-columns: 1fr;
    }

    .applications__grid {
        grid-template-columns: 1fr;
    }

    .hero__proof {
        flex-direction: column;
        gap: 24px;
    }

    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .origin__layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .origin__visual {
        display: none;
    }

    .before-after__grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer__inner {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .nav__links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: 16px 24px;
        gap: 16px;
    }

    .nav__links.active {
        display: flex;
    }

    .nav__toggle {
        display: flex;
    }

    .section__title {
        font-size: 1.8rem;
    }

    .before-after__grid {
        grid-template-columns: 1fr;
    }
}