/* ==========================================================================
   Lozanotek
   Palette and geometry are taken from the mark: black plate, orange wedge,
   navy band. Every angled edge on the site reuses the mark's bottom-leg
   slope (24 rise / 85 run) so the diagonal reads as one system.
   ========================================================================== */

:root {
    color-scheme: light dark;

    /* --- brand constants: identical in both themes ------------------------ */
    --orange: #ff7c00;
    --orange-deep: #cc6200;
    --navy: #073d79;
    --navy-soft: #3d7fc4;
    --ink: #0a0a0a;

    /* --- semantic tokens: these are what components use ------------------- */
    --surface: #ffffff;          /* page background */
    --surface-alt: #eef1f5;      /* alternating band */
    --surface-raised: #ffffff;   /* cards sitting on a band */
    --surface-invert: #0a0a0a;   /* the CTA band and footer */
    --masthead: rgba(255, 255, 255, 0.92);

    --text: #0a0a0a;
    --text-muted: #3a3a3c;
    --text-dim: #6b6b70;
    --on-invert: #ffffff;
    --on-invert-muted: rgba(255, 255, 255, 0.72);
    --on-invert-dim: rgba(255, 255, 255, 0.45);
    --on-invert-line: rgba(255, 255, 255, 0.14);

    --accent-text: #cc6200;      /* orange is unreadable as text on white */
    --link: #073d79;
    --line: #d7dee7;
    --danger: #b00020;

    /* the mark recolours with the theme; the wedge never does */
    --mark-plate: #0a0a0a;
    --mark-band: #073d79;

    --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
    --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    /* the mark's cut */
    --cut-rise: 24px;
    --cut-run: 85px;
    --cut: polygon(0 0, 100% 0, 100% calc(100% - var(--cut-rise)), calc(100% - var(--cut-run)) 100%, 0 100%);

    --shell: 1180px;
    --gutter: clamp(1.25rem, 5vw, 3.5rem);
}

@media (prefers-color-scheme: dark) {
    :root {
        --surface: #0f1216;
        --surface-alt: #161b22;
        --surface-raised: #1e242c;
        --surface-invert: #1e252e;
        --masthead: rgba(15, 18, 22, 0.92);

        --text: #e9edf2;
        --text-muted: #b4bdc8;
        --text-dim: #8a94a0;
        --on-invert: #e9edf2;
        --on-invert-muted: rgba(233, 237, 242, 0.72);
        --on-invert-dim: rgba(233, 237, 242, 0.45);
        --on-invert-line: rgba(233, 237, 242, 0.14);

        --accent-text: #ff9838;
        --link: #6ba5de;
        --line: #2a323c;
        --danger: #ff8a66;

        /* the plate inverts to light, the band lifts so it stays visible */
        --mark-plate: #f2f5f8;
        --mark-band: #3d7fc4;
    }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
    margin: 0;
    background: var(--surface);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.03;
    text-transform: lowercase;
    margin: 0;
}

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

a { color: inherit; }

.prose a,
.contact-facts a {
    color: var(--link);
    text-underline-offset: 3px;
}

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

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.shell {
    width: 100%;
    max-width: var(--shell);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.skip {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--surface-invert);
    color: var(--on-invert);
    padding: 0.75rem 1rem;
    z-index: 100;
}
.skip:focus { left: 0; }

:focus-visible {
    outline: 3px solid var(--orange);
    outline-offset: 3px;
}

/* --------------------------------------------------------------- eyebrow */

.eyebrow {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin: 0 0 1.25rem;
}

/* the tick matches the angle of the mark's vertical leg (17.5deg off plumb) */
.eyebrow::before {
    content: "";
    width: 2px;
    height: 1.1em;
    background: var(--orange);
    transform: rotate(17.5deg);
    flex: none;
}

.eyebrow--light { color: var(--on-invert-muted); }

/* -------------------------------------------------------------- masthead */

.masthead {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--masthead);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.masthead__inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-height: 74px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    margin-right: auto;
}

.logo__mark { width: 34px; height: 34px; }

.logo__word {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.045em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    font-size: 0.9375rem;
    font-weight: 500;
}

.nav a {
    text-decoration: none;
    color: var(--text-muted);
    padding: 0.35rem 0;
    border-bottom: 2px solid transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.nav a:hover { color: var(--text); border-bottom-color: var(--orange); }

.nav__cta {
    background: var(--surface-invert);
    color: var(--on-invert) !important;
    padding: 0.6rem 1.15rem !important;
    border-bottom: 0 !important;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 32px) 100%, 0 100%);
    transition: background 0.15s ease;
}
.nav__cta:hover { background: var(--navy); }

.nav-toggle, .nav-burger { display: none; }

/* ------------------------------------------------------------------ hero */

.hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
}

.hero__inner {
    position: relative;
    z-index: 2;
    padding-block: clamp(4rem, 11vw, 8.5rem) clamp(4rem, 10vw, 7rem);
    max-width: 46rem;
}

.hero__mark {
    position: absolute;
    top: 50%;
    right: -9%;
    width: min(640px, 52vw);
    height: auto;
    transform: translateY(-50%);
    opacity: 0.09;
    z-index: 1;
    pointer-events: none;
}

.hero h1 {
    font-size: clamp(2.75rem, 7.4vw, 5.25rem);
    margin-bottom: 1.5rem;
}

.hero h1 em {
    font-style: normal;
    color: var(--link);
}

.hero__lead {
    font-size: clamp(1.125rem, 2.1vw, 1.375rem);
    line-height: 1.5;
    color: var(--text-muted);
    max-width: 34rem;
    margin-bottom: 2.25rem;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 0.85rem; }

/* --------------------------------------------------------------- buttons */

.btn {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    padding: 0.9rem 1.6rem;
    border: 1px solid transparent;
    cursor: pointer;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 11px), calc(100% - 39px) 100%, 0 100%);
    transition: background 0.15s ease, color 0.15s ease;
}

.btn--primary { background: var(--orange); color: #0a0a0a; }
.btn--primary:hover { background: var(--orange-deep); color: #ffffff; }

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

.btn--light { background: var(--surface); color: var(--text); }
.btn--light:hover { background: var(--orange); }

/* ----------------------------------------------------------------- bands */

.band { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.band--tint { background: var(--surface-alt); }
.band--navy { background: var(--navy); color: #ffffff; }
.band--ink { background: var(--surface-invert); color: var(--on-invert); }
.band--rule { border-top: 1px solid var(--line); }

.band__head { max-width: 40rem; margin-bottom: clamp(2.25rem, 5vw, 3.5rem); }

.band__head h2 { font-size: clamp(2rem, 4.6vw, 3rem); margin-bottom: 1rem; }

.band__head p { color: var(--text-muted); font-size: 1.0625rem; }

.band--navy .band__head p,
.band--ink .band__head p { color: var(--on-invert-muted); }

/* ---------------------------------------------------------- capabilities */

.caps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.cap {
    background: var(--surface-raised);
    padding: clamp(1.75rem, 3.5vw, 2.5rem);
}

.cap__no {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    color: var(--accent-text);
    display: block;
    margin-bottom: 1.25rem;
}

.cap h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }

.cap p { color: var(--text-muted); font-size: 0.9875rem; }

/* --------------------------------------------------------------- phases */

.phases { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }

.phase {
    background: var(--surface-raised);
    padding: 1.75rem;
    clip-path: var(--cut);
    border-top: 3px solid var(--text);
}

.phase:nth-child(2) { border-top-color: var(--orange); }
.phase:nth-child(3) { border-top-color: var(--link); }

.phase__meta {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    display: block;
    margin-bottom: 0.9rem;
}

.phase h3 { font-size: 1.375rem; margin-bottom: 0.6rem; }

.phase p { color: var(--text-muted); font-size: 0.9375rem; padding-bottom: 0.75rem; }

/* ---------------------------------------------------------------- stack */

.stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.stack span {
    border: 1px solid rgba(255, 255, 255, 0.28);
    padding: 0.4rem 0.75rem;
    color: rgba(255, 255, 255, 0.9);
}

.stack span.is-key {
    border-color: var(--orange);
    color: var(--orange);
}

/* ---------------------------------------------------------------- prose */

.prose { max-width: 40rem; }
.prose h2 { font-size: clamp(1.75rem, 3.6vw, 2.375rem); margin: 2.75rem 0 1rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.25rem; margin: 2rem 0 0.5rem; }
.prose p { color: var(--text-muted); }
.prose ul { color: var(--text-muted); padding-left: 1.1rem; margin: 0 0 1rem; }
.prose li { margin-bottom: 0.5rem; }

/* --------------------------------------------------------------- courses */

.course {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1.5rem;
    align-items: start;
    padding: 1.75rem 0;
    border-top: 1px solid var(--line);
}

.course:last-child { border-bottom: 1px solid var(--line); }

.course h3 { font-size: 1.375rem; margin-bottom: 0.5rem; }
.course p { color: var(--text-muted); font-size: 0.9375rem; max-width: 44rem; }

.course__len {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
    white-space: nowrap;
    padding-top: 0.4rem;
}

/* ------------------------------------------------------------------ form */

.form { display: grid; gap: 1.25rem; max-width: 34rem; }

.field { display: grid; gap: 0.4rem; }

.field label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.field input,
.field select,
.field textarea {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text);
    background: var(--surface-raised);
    border: 1px solid var(--line);
    border-radius: 0;
    padding: 0.8rem 0.9rem;
    width: 100%;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--text);
    outline: 2px solid var(--orange);
    outline-offset: 1px;
}

.field textarea { min-height: 9rem; resize: vertical; }

.field-error { color: var(--danger); font-size: 0.85rem; }

.notice {
    border-left: 3px solid var(--orange);
    background: var(--surface-alt);
    padding: 1.25rem 1.5rem;
    max-width: 34rem;
}

.notice h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.notice p { color: var(--text-muted); font-size: 0.9375rem; }

/* --------------------------------------------------------------- contact */

.contact-grid {
    display: grid;
    gap: clamp(2.5rem, 6vw, 4.5rem);
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
}

.contact-facts { display: grid; gap: 1.5rem; }

.contact-facts dt {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.25rem;
}

.contact-facts dd { margin: 0; font-size: 1.0625rem; }

/* ------------------------------------------------------------------- cta */

.cta { text-align: left; }
.cta h2 { font-size: clamp(2rem, 5vw, 3.25rem); margin-bottom: 1rem; max-width: 22ch; }
.cta p { color: var(--on-invert-muted); max-width: 36rem; margin-bottom: 2rem; }

/* ---------------------------------------------------------------- footer */

.footer { background: var(--surface-invert); color: var(--on-invert); padding-top: clamp(3rem, 6vw, 4.5rem); }

.footer__inner {
    display: grid;
    gap: clamp(2rem, 5vw, 4rem);
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    padding-bottom: 3rem;
}

.footer__mark { width: 40px; height: 40px; margin-bottom: 1.25rem; }

.footer__line { color: var(--on-invert-muted); font-size: 0.9375rem; max-width: 30rem; }

.footer__cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }

.footer__cols > div { display: grid; gap: 0.6rem; align-content: start; }

.footer__head {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--on-invert-dim);
    margin-bottom: 0.4rem;
}

.footer__cols a {
    color: var(--on-invert);
    text-decoration: none;
    font-size: 0.9375rem;
    width: fit-content;
    border-bottom: 1px solid transparent;
}

.footer__cols a:hover { border-bottom-color: var(--orange); }

.footer__muted { color: var(--on-invert-dim); font-size: 0.9375rem; }

.footer__base {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding-block: 1.5rem;
    border-top: 1px solid var(--on-invert-line);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--on-invert-dim);
}

/* ----------------------------------------------------------- page header */

.pagehead {
    padding-block: clamp(3.5rem, 8vw, 6rem) clamp(2.5rem, 5vw, 3.5rem);
    border-bottom: 1px solid var(--line);
}

.pagehead h1 { font-size: clamp(2.25rem, 6vw, 4rem); margin-bottom: 1.25rem; }

.pagehead p { color: var(--text-muted); font-size: clamp(1.0625rem, 2vw, 1.25rem); max-width: 38rem; }

/* -------------------------------------------------------------- reveal */

.reveal { opacity: 0; transform: translateY(14px); }

.reveal.is-in {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------------------------------------------------------- responsive */

@media (max-width: 860px) {
    .contact-grid { grid-template-columns: minmax(0, 1fr); }
    .footer__inner { grid-template-columns: minmax(0, 1fr); }
    .course { grid-template-columns: minmax(0, 1fr); gap: 0.5rem; }
    .course__len { padding-top: 0; }
}

@media (max-width: 720px) {
    .nav-burger {
        display: block;
        width: 40px;
        height: 40px;
        position: relative;
        cursor: pointer;
        border: 1px solid var(--line);
    }

    .nav-burger span,
    .nav-burger span::before,
    .nav-burger span::after {
        content: "";
        position: absolute;
        left: 9px;
        width: 20px;
        height: 2px;
        background: var(--text);
    }

    .nav-burger span { top: 19px; }
    .nav-burger span::before { top: -6px; left: 0; }
    .nav-burger span::after { top: 6px; left: 0; }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--surface);
        border-bottom: 1px solid var(--line);
        padding: 0.5rem var(--gutter) 1.25rem;
    }

    .nav a { padding: 0.85rem 0; border-bottom: 1px solid var(--line); }
    .nav__cta { text-align: center; margin-top: 0.85rem; }
    .nav-toggle:checked ~ .nav { display: flex; }
    .masthead__inner { position: relative; }
    .hero__mark { opacity: 0.06; right: -22%; width: 78vw; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal, .reveal.is-in { opacity: 1; transform: none; transition: none; }
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}