/* =========================================================================
   VikVek Tmi — main stylesheet
   Clean professional light. Inter + confident blue. Mobile-first.
   ========================================================================= */

:root {
    /* Palette */
    --ink:        #0f172a;   /* slate-900 — primary text */
    --ink-soft:   #475569;   /* slate-600 — secondary text */
    --ink-faint:  #94a3b8;   /* slate-400 */
    --line:       #e2e8f0;   /* slate-200 — borders */
    --surface:    #ffffff;
    --surface-2:  #f8fafc;   /* slate-50 — alt sections */
    --surface-3:  #f1f5f9;   /* slate-100 */

    --blue:       #2563eb;   /* confident blue */
    --blue-strong:#1d4ed8;
    --blue-ink:   #1e3a8a;
    --blue-tint:  #eff4ff;

    /* Type */
    --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-display: "Satoshi", "Inter", system-ui, sans-serif;

    /* Radius + shadow */
    --r-sm: 8px;
    --r:    14px;
    --r-lg: 22px;
    --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 1px rgba(15,23,42,.04);
    --shadow:    0 10px 30px -12px rgba(15,23,42,.18);
    --shadow-lg: 0 30px 60px -25px rgba(30,58,138,.35);

    /* Layout */
    --container: 1140px;
    --gap: clamp(1rem, 2vw, 1.5rem);
    --section-y: clamp(3.5rem, 7vw, 6rem);
}

/* --- Reset-ish ----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font);
    color: var(--ink);
    background: var(--surface);
    line-height: 1.65;
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-strong); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -.03em; color: var(--ink); margin: 0 0 .5em; font-weight: 700; }
h1, .hero__title, .page-hero__title { font-weight: 900; }
p { margin: 0 0 1rem; }
ul { margin: 0; padding: 0; }

.skip-link {
    position: absolute; left: -999px; top: 0; z-index: 200;
    background: var(--blue); color: #fff; padding: .6rem 1rem; border-radius: 0 0 var(--r-sm) 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; border-radius: 4px; }

/* --- Layout --------------------------------------------------------------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }
.container--narrow { max-width: 760px; }

.section { padding-block: var(--section-y); }
.section--alt { background: var(--surface-2); border-block: 1px solid var(--line); }
.section__head { max-width: 640px; margin: 0 auto clamp(2rem, 4vw, 3rem); text-align: center; }
.section__title { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
.section__lead { color: var(--ink-soft); font-size: 1.075rem; margin: 0; }

.eyebrow {
    text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 700;
    color: var(--blue-strong); margin: 0 0 .9rem;
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
    font-weight: 600; font-size: .98rem; line-height: 1;
    padding: .85rem 1.4rem; border-radius: 999px; border: 1px solid transparent;
    cursor: pointer; transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
    text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--sm { padding: .55rem 1rem; font-size: .9rem; }
.btn--lg { padding: 1rem 1.7rem; font-size: 1.02rem; }
.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 8px 20px -8px rgba(37,99,235,.6); }
.btn--primary:hover { background: var(--blue-strong); color: #fff; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--blue); color: var(--blue-strong); background: var(--blue-tint); }
.btn--light { background: #fff; color: var(--blue-ink); }
.btn--light:hover { background: #f8fafc; color: var(--blue-ink); }

.link-arrow { font-weight: 600; color: var(--blue-strong); }
.link-arrow:hover { text-decoration: none; }

/* --- Header / nav --------------------------------------------------------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,.85); backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent; transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 72px; }

.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 800; font-size: 1.2rem; color: var(--ink); letter-spacing: -.03em; }
.brand:hover { text-decoration: none; }
.brand__mark {
    display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
    background: linear-gradient(135deg, var(--blue), #4f46e5); color: #fff; font-size: .85rem; font-weight: 800;
    box-shadow: 0 6px 16px -6px rgba(37,99,235,.7);
}
.brand__dot { color: var(--blue); }
.brand--light { color: #fff; }
.brand--light .brand__dot { color: #93c5fd; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s, opacity .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.primary-nav { display: flex; align-items: center; gap: 1.5rem; }
.primary-nav__list { display: flex; align-items: center; gap: .35rem; list-style: none; }
.primary-nav__link {
    display: inline-flex; align-items: center; gap: .25rem; color: var(--ink-soft); font-weight: 500;
    padding: .5rem .75rem; border-radius: var(--r-sm); font-size: .96rem;
}
.primary-nav__link:hover { color: var(--ink); background: var(--surface-3); text-decoration: none; }
.primary-nav__link.is-current { color: var(--blue-strong); background: var(--blue-tint); }
.ext-icon { font-size: .7em; color: var(--ink-faint); }
.primary-nav__actions { display: flex; align-items: center; gap: 1rem; }
.lang-switch { font-size: .9rem; font-weight: 600; color: var(--ink-soft); }
.lang-switch:hover { color: var(--blue-strong); text-decoration: none; }

/* --- Generic page hero (interior pages) ---------------------------------- */
.page-hero {
    padding-block: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 3rem);
    background: linear-gradient(180deg, var(--blue-tint), var(--surface));
    border-bottom: 1px solid var(--line);
    text-align: center;
}
.page-hero__title { font-size: clamp(2rem, 4.5vw, 3rem); }
.page-hero__lead { color: var(--ink-soft); font-size: 1.1rem; max-width: 620px; margin: 0 auto; }

/* --- Cards (shared) ------------------------------------------------------- */
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--gap); }
.service-card {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
    padding: 1.6rem; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #cbd5e1; }
.service-card__title { font-size: 1.2rem; }
.service-card__text { color: var(--ink-soft); margin: 0; font-size: .98rem; }
.service-card--lg { padding: 2rem; }

/* --- Portfolio cards (home + portfolio page) ------------------------------ */
.portfolio__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--gap); }
.portfolio-card {
    display: block; border-radius: var(--r); overflow: hidden; background: var(--surface);
    border: 1px solid var(--line); box-shadow: var(--shadow-sm); color: inherit; text-decoration: none;
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.portfolio-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: #cbd5e1; text-decoration: none; }
.portfolio-card__media { position: relative; aspect-ratio: 16 / 11; overflow: hidden; background: var(--surface-3); }
.portfolio-card__img {
    width: 100%; height: 100%; object-fit: cover; object-position: top center;
    filter: grayscale(1) contrast(1.05); transition: filter .6s ease, transform .8s cubic-bezier(.2,.7,.2,1);
}
.portfolio-card:hover .portfolio-card__img { filter: grayscale(0) contrast(1.05); transform: scale(1.06); }
.portfolio-card__mono {
    position: absolute; left: 14px; bottom: 12px; z-index: 1;
    font-family: var(--font-display); font-weight: 900; font-size: 1.6rem; color: #fff;
    width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
    background: linear-gradient(135deg, var(--blue), #4f46e5); box-shadow: var(--shadow);
}
.portfolio-card__row { display: flex; align-items: center; justify-content: space-between; gap: .6rem; padding: 1rem 1.2rem; }
.portfolio-card__name { font-size: 1.05rem; margin: 0; }
.portfolio-card__cta { font-size: .85rem; font-weight: 600; color: var(--blue-strong); white-space: nowrap; }
.portfolio-card__date { font-size: .85rem; font-weight: 600; color: var(--ink-faint); white-space: nowrap; }

/* --- CTA band ------------------------------------------------------------- */
.cta-band { background: linear-gradient(120deg, var(--blue-ink), var(--blue) 60%, #4f46e5); color: #fff; }
.cta-band__inner {
    display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
    padding-block: clamp(2.5rem, 5vw, 4rem);
}
.cta-band__title { color: #fff; font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0 0 .3rem; }
.cta-band__text { color: #dbeafe; margin: 0; max-width: 540px; }

/* --- Footer --------------------------------------------------------------- */
.site-footer { background: #0b1220; color: #cbd5e1; }
.site-footer__grid {
    display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2.5rem;
    padding-block: clamp(3rem, 6vw, 4.5rem);
}
.site-footer__tagline { color: #94a3b8; margin: 1rem 0 0; max-width: 30ch; }
.site-footer__heading { color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; margin: 0 0 1rem; }
.site-footer__col ul { list-style: none; display: grid; gap: .6rem; }
.site-footer__col a, .site-footer__col li { color: #cbd5e1; font-size: .96rem; }
.site-footer__col a:hover { color: #fff; }
.site-footer__bar { border-top: 1px solid rgba(255,255,255,.08); }
.site-footer__bar-inner { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 1.3rem; font-size: .88rem; color: #94a3b8; }
.site-footer__bar-inner a { color: #94a3b8; }
.site-footer__bar-inner a:hover { color: #fff; }

/* --- Flash messages (codex util/flash renders .flash .flash-<type>) -------- */
.flash {
    padding: .9rem 1.1rem 0.9rem 2.6rem; border-radius: var(--r-sm); margin: 0 0 1.2rem;
    font-size: .96rem; border: 1px solid; position: relative; line-height: 1.5;
}
.flash::before { position: absolute; left: 1rem; top: .9rem; font-weight: 700; }
.flash-success { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.flash-success::before { content: "✓"; }
.flash-error, .flash-danger { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.flash-error::before, .flash-danger::before { content: "!"; }
.flash-info { background: var(--blue-tint); border-color: #bfdbfe; color: var(--blue-ink); }
.flash-info::before { content: "i"; font-style: italic; }
.flash-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.flash-warning::before { content: "!"; }

/* --- Prose (article body) ------------------------------------------------- */
.prose { color: var(--ink); font-size: 1.07rem; }
.prose h2 { font-size: 1.5rem; margin-top: 2rem; }
.prose h3 { font-size: 1.2rem; margin-top: 1.5rem; }
.prose p { margin: 0 0 1.1rem; }
.prose ul, .prose ol { margin: 0 0 1.1rem; padding-left: 1.4rem; }
.prose li { margin-bottom: .4rem; }
.prose a { text-decoration: underline; }
.prose blockquote { margin: 1.5rem 0; padding: .5rem 1.2rem; border-left: 4px solid var(--blue); background: var(--surface-2); color: var(--ink-soft); border-radius: 0 var(--r-sm) var(--r-sm) 0; }
.prose code { background: var(--surface-3); padding: .15em .4em; border-radius: 5px; font-size: .9em; }
.prose pre { background: #0b1220; color: #e2e8f0; padding: 1.1rem; border-radius: var(--r-sm); overflow: auto; }
.prose pre code { background: none; padding: 0; }
.prose img { border-radius: var(--r-sm); margin: 1.5rem 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.6rem 0; font-size: .95rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: .65rem .85rem; text-align: left; vertical-align: top; }
.prose thead th { background: var(--surface-2); font-weight: 700; color: var(--ink); }
.prose tbody tr:nth-child(even) { background: var(--surface-2); }

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 880px) {
    .nav-toggle { display: flex; }
    .primary-nav {
        position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
        background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
        padding: 1rem clamp(1rem, 4vw, 2rem) 1.5rem;
        transform: translateY(-120%); opacity: 0; pointer-events: none; transition: transform .28s ease, opacity .2s ease;
        max-height: calc(100dvh - 72px); overflow: auto;
    }
    .primary-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .primary-nav__list { flex-direction: column; align-items: stretch; gap: .15rem; }
    .primary-nav__link { padding: .8rem .75rem; font-size: 1.05rem; }
    .primary-nav__actions { flex-direction: column; align-items: stretch; gap: .75rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); }
    .primary-nav__actions .btn { width: 100%; }
    .site-footer__grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* --- Motion primitives ---------------------------------------------------- */
/* Scroll reveal: elements start hidden, JS adds .in when in view. */
.reveal {
    opacity: 0; transform: translateY(26px);
    transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1);
    transition-delay: var(--rd, 0s); will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }
/* Stagger children of a revealing grid/flex group. */
.stagger > *  { --rd: 0s; }
.stagger > *:nth-child(2) { --rd: .07s; }
.stagger > *:nth-child(3) { --rd: .14s; }
.stagger > *:nth-child(4) { --rd: .21s; }
.stagger > *:nth-child(5) { --rd: .28s; }
.stagger > *:nth-child(6) { --rd: .35s; }

/* --- Infinite marquee ----------------------------------------------------- */
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee__track { display: flex; align-items: center; gap: clamp(2rem, 5vw, 4.5rem); width: max-content; animation: marquee 38s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__item { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.1rem, 2vw, 1.6rem); color: var(--ink-faint); white-space: nowrap; letter-spacing: -.01em; display: inline-flex; align-items: center; gap: .5rem; }
.marquee__item::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); opacity: .55; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* --- Ambient backgrounds -------------------------------------------------- */
.ambient { position: relative; isolation: isolate; }
.ambient > * { position: relative; z-index: 1; }
.ambient::before {
    content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
    background:
        radial-gradient(40% 55% at 12% 8%, rgba(37,99,235,.14), transparent 60%),
        radial-gradient(45% 50% at 92% 0%, rgba(79,70,229,.12), transparent 60%);
}
/* Subtle grain for depth (CSS-only, no asset). */
.grain::after {
    content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
    .reveal { opacity: 1; transform: none; }
    .marquee__track { animation: none; }
}