/* =========================================================
   NEXEM — Brutalist-Tech / Light
   Built against Vercel Web Interface Guidelines
   ========================================================= */

:root {
    /* Brand colors */
    --bg:              #fafaf9;
    --bg-card:         #ffffff;
    --ink:             #080526;
    --ink-soft:        #4a4960;
    --ink-mute:        #8a8aa3;
    --accent:          #0E61D1;
    --accent-hover:    #0a4ea8;
    --accent-soft:     rgba(14, 97, 209, 0.08);
    --border:          rgba(8, 5, 38, 0.08);
    --border-strong:   rgba(8, 5, 38, 0.16);
    --ink-inverse:     #fafaf9;
    --bg-dark:         #080526;

    --max:             1280px;
    --gutter:          clamp(1.25rem, 4vw, 2.5rem);

    --font-display:    "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
    --font-body:       "Geist", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono:       "Geist Mono", ui-monospace, "SF Mono", "Menlo", monospace;
}

/* ============ RESET / BASE ============ */
*, *::before, *::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.55;
    font-feature-settings: "ss01", "ss02", "cv11";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* Subtle grain overlay for depth */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.45 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    opacity: 0.04;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: multiply;
}

@media (prefers-reduced-motion: reduce) {
    body::before { display: none; }
}

a { color: inherit; text-decoration: none; }

p { margin: 0; }

ol, ul { margin: 0; padding: 0; list-style: none; }

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

address { font-style: normal; }

::selection { background: var(--accent); color: #fff; }

/* ============ ACCESSIBILITY ============ */
.skip-link {
    position: absolute;
    top: 0; left: 0;
    padding: 0.75rem 1rem;
    background: var(--ink);
    color: var(--ink-inverse);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transform: translateY(-110%);
    transition: transform 150ms ease-out;
    z-index: 10000;
}

.skip-link:focus {
    transform: translateY(0);
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

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

/* ============ LAYOUT ============ */
.container {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding-inline: var(--gutter);
}

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.035em;
    margin: 0;
    color: var(--ink);
    text-wrap: balance;
}

.mono {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    font-variant-numeric: tabular-nums;
    color: var(--ink);
}

.mono--mute    { color: var(--ink-mute); }
.mono--accent  { color: var(--accent); }
.mono--accent-on-dark { color: #6aa3ff; }

.section-head {
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-head .mono {
    margin-bottom: 1rem;
    display: inline-block;
}

.section-title {
    font-size: clamp(2.25rem, 5.5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 0.95;
}

/* ============ BUTTONS ============ */
.btn {
    --btn-bg:        var(--ink);
    --btn-fg:        var(--ink-inverse);
    --btn-bg-hover:  var(--accent);
    --btn-border:    transparent;

    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.95rem 1.5rem;
    background: var(--btn-bg);
    color: var(--btn-fg);
    border: 1px solid var(--btn-border);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: -0.005em;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 180ms ease, color 180ms ease,
                border-color 180ms ease, transform 120ms ease;
    text-wrap: nowrap;
}

.btn:hover { background: var(--btn-bg-hover); }
.btn:active { transform: translateY(1px); }

.btn--primary {
    --btn-bg: var(--ink);
    --btn-fg: var(--ink-inverse);
    --btn-bg-hover: var(--accent);
}

.btn--ghost {
    --btn-bg: transparent;
    --btn-fg: var(--ink);
    --btn-bg-hover: transparent;
    --btn-border: var(--border-strong);
}
.btn--ghost:hover { border-color: var(--ink); }

.btn--inverse {
    --btn-bg: var(--ink-inverse);
    --btn-fg: var(--ink);
    --btn-bg-hover: var(--accent);
    color: var(--ink);
}
.btn--inverse:hover { color: #fff; }

.btn__arrow {
    display: inline-block;
    transition: transform 220ms ease;
}
.btn:hover .btn__arrow { transform: translateX(2px); }
.btn--ghost:hover .btn__arrow { transform: translateY(2px); }

/* ============ TOPBAR ============ */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(250, 250, 249, 0.78);
    backdrop-filter: saturate(140%) blur(14px);
    -webkit-backdrop-filter: saturate(140%) blur(14px);
    border-bottom: 1px solid var(--border);
}

.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    height: 84px;
}

.topbar__brand {
    display: inline-flex;
    align-items: center;
    min-width: 0;
}

.topbar__logo { height: 50px; width: auto; }

@media (max-width: 540px) {
    .topbar__inner { height: 72px; }
    .topbar__logo { height: 40px; }
}

.topbar__nav {
    display: flex;
    gap: clamp(1rem, 3vw, 2rem);
    font-size: 0.95rem;
}

.topbar__nav a {
    color: var(--ink-soft);
    transition: color 160ms ease;
    position: relative;
}
.topbar__nav a:hover { color: var(--ink); }
.topbar__nav a::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -6px;
    height: 1px;
    background: var(--ink);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 220ms ease;
}
.topbar__nav a:hover::after { transform: scaleX(1); }

/* ============ HERO ============ */
.hero {
    position: relative;
    overflow: hidden;
    padding-top: clamp(4rem, 10vw, 7rem);
    padding-bottom: clamp(4rem, 10vw, 7rem);
    min-height: calc(100vh - 84px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-bottom: 1px solid var(--border);
}

.hero__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.hero__mesh {
    position: absolute;
    inset: -10%;
    background:
        radial-gradient(700px 520px at 100% 0%, rgba(14, 97, 209, 0.16), transparent 55%),
        radial-gradient(580px 380px at 0% 90%, rgba(14, 97, 209, 0.05), transparent 55%);
    animation: meshpan 14s ease-in-out infinite alternate;
    transform-origin: center;
}

@keyframes meshpan {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to   { transform: translate3d(-2%, 1%, 0) scale(1.04); }
}

@media (prefers-reduced-motion: reduce) {
    .hero__mesh { animation: none; }
}

.hero__mark {
    position: absolute;
    right: -18%;
    bottom: -28%;
    width: min(85vw, 1100px);
    height: auto;
    opacity: 0.045;
    transform: rotate(-4deg);
}

.hero__inner {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-block: clamp(2rem, 6vh, 5rem);
    max-width: 1100px;
}

.hero__eyebrow {
    margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
    color: var(--accent);
    animation: rise 720ms cubic-bezier(0.2, 0.6, 0.2, 1) 80ms both;
}

.hero__title {
    font-size: clamp(3rem, 9.5vw, 8rem);
    font-weight: 800;
    line-height: 0.92;
    letter-spacing: -0.045em;
    max-width: 16ch;
    margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
    animation: rise 720ms cubic-bezier(0.2, 0.6, 0.2, 1) 160ms both;
    text-wrap: balance;
}

.hero__title em {
    font-style: italic;
    font-weight: 800;
    color: var(--accent);
    position: relative;
    padding-right: 0.05em;
}

.hero__sub {
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    line-height: 1.5;
    color: var(--ink-soft);
    max-width: 56ch;
    margin-bottom: clamp(2rem, 4vw, 2.75rem);
    animation: rise 720ms cubic-bezier(0.2, 0.6, 0.2, 1) 240ms both;
    text-wrap: pretty;
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    animation: rise 720ms cubic-bezier(0.2, 0.6, 0.2, 1) 320ms both;
}

@keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
    .hero__eyebrow, .hero__title, .hero__sub, .hero__cta {
        animation: none;
    }
}

/* ============ SCROLL REVEAL ============ */
[data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 700ms cubic-bezier(0.2, 0.6, 0.2, 1),
                transform 700ms cubic-bezier(0.2, 0.6, 0.2, 1);
    will-change: opacity, transform;
}

[data-reveal].is-revealed {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ============ SERVICES ============ */
.services {
    padding-block: clamp(5rem, 10vw, 8rem);
    border-bottom: 1px solid var(--border);
}

.service-list {
    border-top: 1px solid var(--border);
}

.service {
    position: relative;
    display: grid;
    grid-template-columns: minmax(80px, 120px) 1fr auto;
    gap: clamp(1.25rem, 3vw, 3rem);
    align-items: start;
    padding: clamp(2rem, 5vw, 3.5rem) 0;
    border-bottom: 1px solid var(--border);
    transition: padding-left 220ms cubic-bezier(0.2, 0.6, 0.2, 1);
}

.service::before {
    content: "";
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 320ms cubic-bezier(0.2, 0.6, 0.2, 1);
}

.service:hover { padding-left: 1.25rem; }
.service:hover::before { transform: scaleY(1); }

.service__num {
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--ink-mute);
    transition: color 220ms ease;
}

.service:hover .service__num { color: var(--accent); }

.service__body { min-width: 0; max-width: 60ch; }

.service__title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1;
    margin-bottom: 1rem;
}

.service__desc {
    color: var(--ink-soft);
    font-size: 1.05rem;
    line-height: 1.55;
    margin-bottom: 1.25rem;
    text-wrap: pretty;
}

.service__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.55rem;
}

.service__tags li {
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--border-strong);
    color: var(--ink);
    font-size: 0.72rem;
    border-radius: 999px;
    background: var(--bg-card);
    transition: border-color 160ms ease, color 160ms ease;
}

.service:hover .service__tags li {
    border-color: rgba(14, 97, 209, 0.3);
}

.service__arrow {
    align-self: center;
    font-size: 1.5rem;
    color: var(--ink-mute);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 240ms ease, transform 240ms ease, color 240ms ease;
}

.service:hover .service__arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--accent);
}

@media (max-width: 720px) {
    .service { grid-template-columns: minmax(60px, 80px) 1fr; }
    .service__arrow { display: none; }
}

/* ============ APPROACH ============ */
.approach {
    padding-block: clamp(5rem, 10vw, 8rem);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.approach-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0;
}

.step {
    padding: clamp(1.5rem, 3vw, 2rem);
    border: 1px solid var(--border);
    margin: -1px 0 0 -1px;
    background: var(--bg-card);
    transition: background-color 200ms ease;
}

.step:hover { background: var(--accent-soft); }

.step__num {
    color: var(--accent);
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
    display: inline-block;
}

.step__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.step__desc {
    color: var(--ink-soft);
    font-size: 0.97rem;
    line-height: 1.5;
    text-wrap: pretty;
}

/* ============ STACK ============ */
.stack {
    padding-block: clamp(2.5rem, 5vw, 4rem);
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.stack__inner {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.stack__label { color: var(--ink-mute); }

.stack__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    align-items: center;
}

.stack__list li {
    color: var(--ink);
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    text-transform: none;
    position: relative;
    padding-right: 1.25rem;
}

.stack__list li:not(:last-child)::after {
    content: "•";
    position: absolute;
    right: 0;
    color: var(--ink-mute);
    opacity: 0.5;
}

.stack__list li:last-child { padding-right: 0; }

/* ============ CTA BLOCK ============ */
.cta {
    background: var(--bg-dark);
    color: var(--ink-inverse);
    padding-block: clamp(5rem, 12vw, 9rem);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(800px 400px at 80% 0%, rgba(14, 97, 209, 0.32), transparent 60%);
    pointer-events: none;
}

.cta__inner {
    position: relative;
    text-align: center;
    max-width: 840px;
    margin: 0 auto;
}

.cta__eyebrow {
    color: #6aa3ff;
    margin-bottom: 1.25rem;
}

.cta__title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.045em;
    margin-bottom: 1.5rem;
    color: #fff;
    text-wrap: balance;
}

.cta__sub {
    font-size: clamp(1.05rem, 1.4vw, 1.2rem);
    color: rgba(250, 250, 249, 0.7);
    margin-bottom: 2.25rem;
    max-width: 50ch;
    margin-inline: auto;
    text-wrap: pretty;
}

/* ============ CONTACT ============ */
.contact {
    padding-block: clamp(5rem, 10vw, 8rem);
}

.contact__inner > .mono { margin-bottom: 1rem; display: inline-block; }
.contact__inner > .section-title { margin-bottom: 2rem; }

.contact__mail {
    display: inline-block;
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    color: var(--ink);
    border-bottom: 2px solid transparent;
    padding-bottom: 6px;
    transition: color 200ms ease, border-color 200ms ease;
    text-wrap: nowrap;
}

.contact__mail:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ============ FOOTER ============ */
.site-footer {
    border-top: 1px solid var(--border);
    padding-block: 1.5rem;
    color: var(--ink-mute);
}

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

.site-footer__nav {
    display: flex;
    gap: 1.5rem;
}

.site-footer__nav a {
    color: var(--ink-mute);
    transition: color 160ms ease;
    font-size: 0.78rem;
}
.site-footer__nav a:hover { color: var(--ink); }

@media (max-width: 540px) {
    .site-footer__inner { flex-direction: column; align-items: flex-start; }
}

/* ============ LEGAL PAGES (Impressum / Datenschutz) ============ */
.legal {
    padding-block: clamp(4rem, 8vw, 6rem);
    max-width: 760px;
    margin: 0 auto;
    padding-inline: var(--gutter);
}

.legal h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
    line-height: 0.95;
}

.legal > p:first-of-type {
    color: var(--ink-mute);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 2.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
}

.legal h2 {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    margin: 2.75rem 0 1rem;
}

.legal p, .legal ul {
    color: var(--ink-soft);
    margin-bottom: 1rem;
    line-height: 1.65;
    text-wrap: pretty;
}

.legal p strong { color: var(--ink); font-weight: 600; }

.legal ul { padding-left: 1.25rem; list-style: disc; }
.legal ul li { margin-bottom: 0.35rem; }

.legal a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}
.legal a:hover { text-decoration-thickness: 2px; }