/* =========================================================
   DevOps Academy — styles.css
   Dark, modern, tech-focused. Mobile-first, accessible.
   ========================================================= */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
body.lang-ka {
    font-family: 'Noto Sans Georgian', 'Inter', system-ui, sans-serif;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.015em; }
p { margin: 0; }

/* ---------- Tokens ---------- */
:root {
    --bg: #0a0f1e;
    --bg-2: #0e1530;
    --bg-elev: rgba(255, 255, 255, 0.03);
    --panel: rgba(255, 255, 255, 0.04);
    --panel-strong: rgba(255, 255, 255, 0.06);
    --border: rgba(148, 163, 255, 0.14);
    --border-strong: rgba(148, 163, 255, 0.28);
    --text: #e6e9f5;
    --text-muted: #9aa3c7;
    --text-dim: #6b7399;

    --accent: #5b8cff;       /* neon blue */
    --accent-2: #a56bff;     /* neon purple */
    --accent-3: #22d3ee;     /* cyan */
    --success: #22c55e;
    --danger: #ef4444;

    --grad-accent: linear-gradient(135deg, #5b8cff 0%, #a56bff 55%, #22d3ee 100%);
    --grad-soft: linear-gradient(180deg, rgba(91,140,255,0.10), rgba(165,107,255,0.05));

    --shadow-lg: 0 20px 60px -20px rgba(91, 140, 255, 0.35);
    --shadow-md: 0 10px 30px -12px rgba(0, 0, 0, 0.6);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;

    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    --container: 1180px;
    --header-h: 70px;
}

/* ---------- Utilities ---------- */
.container {
    width: min(100% - 2rem, var(--container));
    margin-inline: auto;
}
.eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    color: var(--accent-3);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}
.gradient-text {
    background: var(--grad-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.accent { color: var(--accent); }

/* ---------- Background canvas ---------- */
#bg-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(ellipse at 20% 10%, rgba(91,140,255,0.15), transparent 45%),
                radial-gradient(ellipse at 85% 40%, rgba(165,107,255,0.12), transparent 50%),
                linear-gradient(180deg, #070b19 0%, #0a0f1e 45%, #0a0f1e 100%);
}

/* ---------- Header ---------- */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-h);
    z-index: 50;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: rgba(10, 15, 30, 0.55);
    border-bottom: 1px solid transparent;
    transition: border-color .3s ease, background .3s ease;
}
.site-header.scrolled {
    background: rgba(10, 15, 30, 0.8);
    border-bottom-color: var(--border);
}
.nav {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    font-size: 1.1rem;
}
.logo-mark {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--bg);
    background: var(--grad-accent);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.85rem;
    line-height: 1;
    box-shadow: 0 6px 18px -6px rgba(91,140,255,0.6);
}
.logo-text .accent { color: var(--accent); }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}
.nav-menu a {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    position: relative;
    transition: color .2s ease;
}
.nav-menu a:not(.lang-active):hover { color: var(--text); }
.nav-menu a:not(.lang-active)::after {
    content: "";
    position: absolute;
    left: 0; bottom: -6px;
    height: 2px; width: 0;
    background: var(--grad-accent);
    transition: width .25s ease;
}
.nav-menu a:not(.lang-active):hover::after { width: 100%; }

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-dim);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.35rem 0.75rem;
}
.lang-switch a { padding: 0 2px; color: var(--text-muted); }
.lang-switch a.lang-active { color: var(--accent); font-weight: 700; }
.lang-switch a:hover { color: var(--text); }

.nav-toggle {
    display: none;
    width: 40px; height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.nav-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.95rem 1.6rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.98rem;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
    white-space: nowrap;
}
.btn-primary {
    background: var(--grad-accent);
    color: #0a0f1e;
    box-shadow: 0 10px 30px -10px rgba(91,140,255,0.7);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -12px rgba(165,107,255,0.7); }
.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--panel-strong); border-color: var(--accent); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    padding: calc(var(--header-h) + 3rem) 0 5rem;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(91,140,255,0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91,140,255,0.07) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
    pointer-events: none;
    z-index: 0;
    animation: gridShift 40s linear infinite;
}
@keyframes gridShift {
    from { background-position: 0 0, 0 0; }
    to   { background-position: 60px 60px, 60px 60px; }
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 3.5rem;
    align-items: center;
}
.hero-title {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: clamp(2.3rem, 5.5vw, 4.2rem);
    line-height: 1.05;
    margin-bottom: 1.25rem;
}
.lang-ka .hero-title {
    font-family: 'Noto Sans Georgian', var(--font-mono), sans-serif;
}
.hero-subtitle {
    font-size: clamp(1rem, 1.4vw, 1.12rem);
    color: var(--text-muted);
    max-width: 52ch;
    margin-bottom: 2rem;
}
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-bottom: 2.5rem;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    max-width: 540px;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
}
.hero-stats li {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.hero-stats strong {
    font-family: var(--font-mono);
    font-size: clamp(1.3rem, 2.2vw, 1.75rem);
    background: var(--grad-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-stats span {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* ---- Pipeline visual ---- */
.hero-visual {
    position: relative;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pipeline {
    position: relative;
    width: 100%;
    aspect-ratio: 1/1;
    max-width: 460px;
    border-radius: var(--radius-lg);
    background: var(--grad-soft);
    border: 1px solid var(--border);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}
.pipeline-track {
    display: grid;
    grid-template-columns: repeat(4, auto);
    grid-auto-flow: column;
    align-items: center;
    gap: 0.2rem;
    width: 100%;
}
.node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    animation: floatY 4s ease-in-out infinite;
}
.node-1 { animation-delay: 0s; }
.node-2 { animation-delay: .5s; }
.node-3 { animation-delay: 1s; }
.node-4 { animation-delay: 1.5s; }
.node-icon {
    width: 56px; height: 56px;
    display: grid; place-items: center;
    border-radius: 14px;
    background: rgba(10, 15, 30, 0.7);
    border: 1px solid var(--border-strong);
    color: var(--accent);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 12px 30px -12px rgba(91,140,255,0.5);
}
.node-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}
.pipeline-line {
    position: relative;
    height: 2px;
    width: 100%;
    min-width: 20px;
    background: linear-gradient(90deg, rgba(91,140,255,0.1), rgba(165,107,255,0.6), rgba(91,140,255,0.1));
    overflow: hidden;
    align-self: center;
    margin-top: -16px;
    border-radius: 2px;
}
.pulse {
    position: absolute;
    top: -3px;
    left: 0;
    width: 18px;
    height: 8px;
    border-radius: 8px;
    background: linear-gradient(90deg, transparent, var(--accent-3), transparent);
    animation: pulseMove 2.2s linear infinite;
}
.pipeline-line:nth-of-type(4) .pulse { animation-delay: .6s; }
.pipeline-line:nth-of-type(6) .pulse { animation-delay: 1.2s; }
@keyframes pulseMove {
    0%   { left: -20%; }
    100% { left: 110%; }
}
@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}

.floating-cards {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.f-card {
    position: absolute;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    background: rgba(10, 15, 30, 0.85);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    color: var(--text);
    box-shadow: var(--shadow-md);
    animation: floatY 5s ease-in-out infinite;
}
.f-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent-3);
    box-shadow: 0 0 10px var(--accent-3);
}
.card-k8s { top: 8%;  left: -4%;  animation-delay: .2s; }
.card-tf  { top: 14%; right: -4%; animation-delay: .9s; }
.card-aws { bottom: 18%; left: -4%; animation-delay: 1.4s; }
.card-ci  { bottom: 10%; right: -4%; animation-delay: 1.9s; }
.card-tf .f-dot, .card-ci .f-dot { background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2); }
.card-aws .f-dot { background: var(--accent); box-shadow: 0 0 10px var(--accent); }

/* Scroll cue */
.scroll-cue {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 24px; height: 40px;
    border: 2px solid var(--border-strong);
    border-radius: 20px;
    display: grid; place-items: center;
    z-index: 1;
}
.scroll-cue span {
    width: 3px; height: 8px;
    background: var(--accent);
    border-radius: 2px;
    animation: scrollDrop 1.6s ease-in-out infinite;
}
@keyframes scrollDrop {
    0%   { transform: translateY(-8px); opacity: 0; }
    50%  { opacity: 1; }
    100% { transform: translateY(8px); opacity: 0; }
}

/* ---------- Sections ---------- */
section { position: relative; padding: 6rem 0; }
.section-head {
    max-width: 780px;
    margin: 0 auto 3rem;
    text-align: center;
}
.section-head h2 {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: clamp(1.85rem, 3.5vw, 2.75rem);
    margin-bottom: 1rem;
}
.lang-ka .section-head h2 {
    font-family: 'Noto Sans Georgian', var(--font-mono), sans-serif;
}
.section-lead {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 64ch;
    margin: 0 auto;
}

/* ---- About ---- */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}
.about-card {
    padding: 2rem 1.75rem;
    border-radius: var(--radius-md);
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform .35s ease, border-color .25s ease, background .25s ease;
}
.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    background: var(--panel-strong);
}
.about-icon {
    font-size: 1.8rem;
    width: 48px; height: 48px;
    display: grid; place-items: center;
    border-radius: 12px;
    background: var(--grad-soft);
    border: 1px solid var(--border);
    margin-bottom: 1rem;
}
.about-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}
.about-card p {
    color: var(--text-muted);
    font-size: 0.98rem;
}

/* ---- Courses ---- */
.courses {
    background:
        radial-gradient(ellipse at 80% 0%, rgba(165,107,255,0.08), transparent 40%),
        radial-gradient(ellipse at 10% 100%, rgba(91,140,255,0.08), transparent 40%);
}
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
    gap: 1.25rem;
}
.course-card {
    position: relative;
    padding: 2rem 1.75rem;
    border-radius: var(--radius-md);
    background: var(--panel);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: transform .35s ease, border-color .25s ease;
}
.course-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--grad-accent);
    opacity: 0;
    transition: opacity .3s ease;
    z-index: 0;
    mix-blend-mode: overlay;
}
.course-card:hover,
.course-card:focus-visible {
    transform: translateY(-6px);
    border-color: var(--border-strong);
    outline: none;
}
.course-card:hover::before,
.course-card:focus-visible::before { opacity: 0.08; }
.course-card > * { position: relative; z-index: 1; }

.course-icon {
    width: 56px; height: 56px;
    display: grid; place-items: center;
    border-radius: 14px;
    background: rgba(10,15,30,0.5);
    border: 1px solid var(--border-strong);
    color: var(--accent);
    margin-bottom: 1rem;
    transition: transform .35s ease, color .3s ease, border-color .3s ease;
}
.course-card:hover .course-icon {
    transform: rotate(-4deg) scale(1.05);
    color: var(--accent-2);
    border-color: var(--accent-2);
}
.k8s-icon  { color: var(--accent); }
.cicd-icon { color: var(--accent-3); }
.aws-icon  { color: #ffb86b; }
.iac-icon  { color: var(--accent-2); }

.course-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}
.course-card p {
    color: var(--text-muted);
    font-size: 0.96rem;
    margin-bottom: 1rem;
}
.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}
.course-tags li {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    background: rgba(255,255,255,0.02);
}

/* ---- Why ---- */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}
.why-card {
    position: relative;
    padding: 2rem 1.75rem;
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
    border: 1px solid var(--border);
    transition: transform .35s ease, border-color .25s ease;
}
.why-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
}
.why-num {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    background: var(--grad-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.75rem;
    display: inline-block;
}
.why-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}
.why-card p {
    color: var(--text-muted);
    font-size: 0.98rem;
}

/* ---- Contact ---- */
.contact {
    padding-bottom: 7rem;
}
.contact-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}
.contact-copy h2 {
    font-family: var(--font-mono);
    font-size: clamp(1.85rem, 3.5vw, 2.75rem);
    margin-bottom: 1rem;
}
.lang-ka .contact-copy h2 {
    font-family: 'Noto Sans Georgian', var(--font-mono), sans-serif;
}
.contact-copy p {
    color: var(--text-muted);
    margin-bottom: 1.75rem;
    font-size: 1.05rem;
}
.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}
.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem 1.1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--panel);
    font-family: var(--font-mono);
    font-size: 0.92rem;
    color: var(--text);
    transition: transform .2s ease, border-color .25s ease, background .25s ease;
    width: max-content;
    max-width: 100%;
}
.contact-link:hover {
    transform: translateX(4px);
    border-color: var(--accent);
    background: var(--panel-strong);
}
.c-ico {
    width: 28px; height: 28px;
    display: grid; place-items: center;
    border-radius: 8px;
    background: var(--grad-soft);
    border: 1px solid var(--border);
    color: var(--accent);
}

.contact-form {
    padding: 2rem;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow-md);
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.form-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    letter-spacing: 0.04em;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: var(--radius-sm);
    background: rgba(10,15,30,0.6);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 0.98rem;
    font-family: inherit;
    transition: border-color .2s ease, box-shadow .2s ease;
    resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dim); }
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(91,140,255,0.18);
}
.form-group input.is-invalid,
.form-group textarea.is-invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239,68,68,0.15);
}
.form-status {
    min-height: 1.2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.form-status.success { color: var(--success); }
.form-status.error   { color: var(--danger); }

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 2.5rem 0;
    background: rgba(6, 10, 22, 0.6);
}
.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    align-items: center;
}
.footer-brand p {
    color: var(--text-muted);
    margin-top: 0.5rem;
    font-size: 0.95rem;
    max-width: 42ch;
}
.footer-social {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
}
.social-link {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: transform .2s ease, color .2s ease, border-color .2s ease, background .2s ease;
}
.social-link:hover {
    transform: translateY(-2px);
    color: var(--text);
    border-color: var(--accent);
    background: var(--panel-strong);
}
.copyright {
    color: var(--text-dim);
    font-size: 0.88rem;
    text-align: right;
}

/* ---------- Reveal on scroll ---------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .8s ease, transform .8s ease;
    will-change: opacity, transform;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
    .hero-visual { order: -1; }
    .pipeline { max-width: 420px; margin-inline: auto; }
    .contact-inner { grid-template-columns: 1fr; gap: 2rem; }
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-brand p { margin-inline: auto; }
    .copyright { text-align: center; }
    .footer-social { justify-content: center; }
}

@media (max-width: 720px) {
    section { padding: 4.5rem 0; }
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        background: rgba(10, 15, 30, 0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: 1rem 1.25rem 1.5rem;
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: transform .25s ease, opacity .25s ease, visibility .25s ease;
    }
    .nav-menu li { width: 100%; border-bottom: 1px solid var(--border); }
    .nav-menu li:last-child { border-bottom: none; }
    .nav-menu a { display: block; padding: 0.9rem 0; width: 100%; }
    .nav-menu.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .lang-switch {
        align-self: flex-start;
        margin-top: 0.5rem;
    }
    .hero { padding-top: calc(var(--header-h) + 2rem); }
    .hero-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.5rem; }
    .hero-stats strong { font-size: 1.25rem; }
    .hero-stats span { font-size: 0.72rem; }
    .scroll-cue { display: none; }
    .f-card { font-size: 0.72rem; padding: 0.35rem 0.65rem; }
    .card-k8s { left: -2%; top: 4%; }
    .card-tf  { right: -2%; top: 10%; }
    .card-aws { left: -2%; bottom: 14%; }
    .card-ci  { right: -2%; bottom: 6%; }
}

/* ---------- Motion safety ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001s !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
}

/* ---------- Focus ring ---------- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}