/* penclos.com — Privacy Encloser
   Glassmorphism + zen, layered nested enclosures. */

:root {
    --bg-deep: #0a2a3a;
    --bg-mid: #1a4a5a;
    --frost-text: #e0f0f0;
    --secure-teal: #00ccaa;

    --glass-1: rgba(255, 255, 255, 0.08);
    --glass-2: rgba(255, 255, 255, 0.15);
    --glass-3: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.20);
    --glass-border-soft: rgba(255, 255, 255, 0.10);

    --teal-glow: rgba(0, 204, 170, 0.10);
    --teal-glow-strong: rgba(0, 204, 170, 0.25);

    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 12px;

    --layer-blur-1: 4px;
    --layer-blur-2: 8px;
    --layer-blur-3: 12px;

    --font-display: 'Montserrat', system-ui, sans-serif;
    --font-body: 'Open Sans', system-ui, sans-serif;
    --font-mono: 'Roboto Mono', ui-monospace, 'SFMono-Regular', monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--frost-text);
    background: linear-gradient(135deg, #0a2a3a 0%, #1a4a5a 100%);
    background-attachment: fixed;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 10%, rgba(0, 204, 170, 0.10), transparent 55%),
        radial-gradient(ellipse at 85% 80%, rgba(0, 204, 170, 0.06), transparent 60%),
        radial-gradient(ellipse at 50% 50%, rgba(255, 255, 255, 0.03), transparent 70%);
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--secure-teal);
    text-decoration: none;
    transition: color 220ms ease, opacity 220ms ease;
}

a:hover {
    color: #66e0c8;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input {
    font-family: inherit;
    color: inherit;
}

/* ───────── Ambient ambient orbs ───────── */
.ambient-glow {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: drift 22s ease-in-out infinite alternate;
}

.orb-a {
    width: 480px; height: 480px;
    top: -120px; left: -120px;
    background: radial-gradient(circle, rgba(0, 204, 170, 0.35), transparent 70%);
}

.orb-b {
    width: 560px; height: 560px;
    bottom: -160px; right: -160px;
    background: radial-gradient(circle, rgba(0, 204, 170, 0.20), transparent 70%);
    animation-duration: 28s;
    animation-delay: -6s;
}

.orb-c {
    width: 380px; height: 380px;
    top: 45%; left: 55%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
    animation-duration: 32s;
    animation-delay: -12s;
}

@keyframes drift {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(40px, -30px) scale(1.06); }
    100% { transform: translate(-30px, 50px) scale(0.96); }
}

/* ───────── Layer indicator ───────── */
.layer-indicator {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 100;
    padding: 14px 16px;
    min-width: 168px;
    background: var(--glass-1);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    box-shadow: 0 0 24px rgba(0, 204, 170, 0.10);
    font-family: var(--font-mono);
    color: var(--frost-text);
    transition: background 320ms ease, box-shadow 320ms ease, transform 320ms ease;
}

.indicator-label {
    font-size: 0.6rem;
    letter-spacing: 0.22em;
    color: var(--secure-teal);
    margin-bottom: 6px;
}

.indicator-depth {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--frost-text);
    line-height: 1;
}

.indicator-divider {
    color: rgba(224, 240, 240, 0.4);
    font-size: 1rem;
}

.indicator-total {
    color: rgba(224, 240, 240, 0.55);
    font-size: 0.95rem;
}

.indicator-bar {
    height: 3px;
    margin-top: 10px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.indicator-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--secure-teal), #66e0c8);
    border-radius: 2px;
    transition: width 320ms ease;
    box-shadow: 0 0 8px var(--teal-glow-strong);
}

.indicator-meta {
    margin-top: 8px;
    font-size: 0.6rem;
    letter-spacing: 0.18em;
    color: rgba(224, 240, 240, 0.65);
}

/* ───────── Site header ───────── */
.site-header {
    position: relative;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px clamp(20px, 5vw, 56px);
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.brand-mark {
    position: relative;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.brand-mark .mark-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.brand-mark .mark-ring:nth-child(1) {
    inset: 0;
    background: rgba(255, 255, 255, 0.05);
}

.brand-mark .mark-ring:nth-child(2) {
    inset: 6px;
    background: rgba(255, 255, 255, 0.10);
}

.brand-mark .mark-ring:nth-child(3) {
    inset: 12px;
    background: rgba(0, 204, 170, 0.35);
    border-color: rgba(0, 204, 170, 0.6);
    box-shadow: 0 0 12px var(--teal-glow-strong);
}

.brand-name {
    font-size: 1.05rem;
    color: var(--frost-text);
}

.brand-dot {
    color: var(--secure-teal);
}

.site-nav {
    display: flex;
    gap: 28px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.site-nav a {
    color: rgba(224, 240, 240, 0.78);
    position: relative;
    padding: 6px 0;
}

.site-nav a::after {
    content: '';
    position: absolute;
    left: 0; right: 100%;
    bottom: 0;
    height: 1px;
    background: var(--secure-teal);
    transition: right 280ms ease;
}

.site-nav a:hover {
    color: var(--frost-text);
}

.site-nav a:hover::after {
    right: 0;
}

.header-cta {
    padding: 10px 18px;
    border-radius: 999px;
    background: rgba(0, 204, 170, 0.12);
    border: 1px solid rgba(0, 204, 170, 0.4);
    color: var(--frost-text);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: background 240ms ease, border-color 240ms ease, transform 240ms ease;
}

.header-cta:hover {
    background: rgba(0, 204, 170, 0.22);
    border-color: rgba(0, 204, 170, 0.7);
    transform: translateY(-1px);
    color: var(--frost-text);
}

/* ───────── Main flow ───────── */
main {
    position: relative;
    z-index: 1;
}

section {
    position: relative;
    padding: clamp(80px, 12vh, 140px) clamp(20px, 5vw, 56px);
}

/* ───────── Hero ───────── */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: clamp(40px, 8vh, 80px);
    padding-bottom: clamp(60px, 10vh, 120px);
}

.hero-stack {
    position: relative;
    width: min(1100px, 92vw);
    aspect-ratio: 16 / 10;
    max-height: 80vh;
    margin: 0 auto;
}

.hero-shell {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow:
        0 0 40px var(--teal-glow),
        inset 0 1px 0 rgba(255, 255, 255, 0.10);
    transition: transform 600ms cubic-bezier(.22,.61,.36,1), backdrop-filter 320ms ease, background 320ms ease;
    will-change: transform, background;
}

.hero-shell-outer {
    width: 100%; height: 100%;
    background: var(--glass-1);
    backdrop-filter: blur(4px) saturate(120%);
    -webkit-backdrop-filter: blur(4px) saturate(120%);
}

.hero-shell-middle {
    width: 88%; height: 84%;
    background: var(--glass-2);
    backdrop-filter: blur(8px) saturate(130%);
    -webkit-backdrop-filter: blur(8px) saturate(130%);
}

.hero-shell-inner {
    width: 76%; height: 68%;
    background: var(--glass-3);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    box-shadow:
        0 0 60px rgba(0, 204, 170, 0.18),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
}

.shell-tag {
    position: absolute;
    top: 18px; left: 22px;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    color: rgba(224, 240, 240, 0.7);
    text-transform: uppercase;
}

.hero-shell-inner .shell-tag {
    color: var(--secure-teal);
}

.hero-content {
    text-align: center;
    padding: clamp(20px, 4vw, 48px);
    max-width: 90%;
}

.hero-eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.32em;
    color: var(--secure-teal);
    margin-bottom: 18px;
    padding: 6px 14px;
    border: 1px solid rgba(0, 204, 170, 0.35);
    border-radius: 999px;
    background: rgba(0, 204, 170, 0.08);
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2rem, 7vw, 5.2rem);
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--frost-text);
    margin-bottom: 18px;
}

.title-dot {
    color: var(--secure-teal);
}

.hero-tagline {
    font-size: clamp(0.95rem, 1.6vw, 1.1rem);
    line-height: 1.7;
    color: rgba(224, 240, 240, 0.85);
    max-width: 540px;
    margin: 0 auto 28px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    border: 1px solid transparent;
    transition: transform 220ms ease, background 240ms ease, border-color 240ms ease, color 240ms ease, box-shadow 240ms ease;
}

.btn-primary {
    background: var(--secure-teal);
    color: #07252f;
    border-color: var(--secure-teal);
    box-shadow: 0 0 24px var(--teal-glow-strong);
}

.btn-primary:hover {
    background: #66e0c8;
    border-color: #66e0c8;
    color: #07252f;
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 204, 170, 0.45);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--glass-border);
    color: var(--frost-text);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--frost-text);
    transform: translateY(-2px);
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    max-width: 460px;
    margin: 0 auto;
    padding-top: 22px;
    border-top: 1px solid var(--glass-border-soft);
}

.meta-cell {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-family: var(--font-mono);
}

.meta-key {
    font-size: 0.6rem;
    letter-spacing: 0.22em;
    color: rgba(224, 240, 240, 0.55);
}

.meta-val {
    font-size: 0.85rem;
    color: var(--secure-teal);
    letter-spacing: 0.14em;
}

.hero-scroll {
    margin-top: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.scroll-line {
    width: 1px;
    height: 36px;
    background: linear-gradient(to bottom, transparent, var(--secure-teal));
    animation: scroll-line 2.4s ease-in-out infinite;
}

@keyframes scroll-line {
    0%, 100% { transform: scaleY(0.4); transform-origin: top; opacity: 0.4; }
    50%      { transform: scaleY(1);   transform-origin: top; opacity: 1; }
}

.scroll-text {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.28em;
    color: rgba(224, 240, 240, 0.55);
    text-transform: uppercase;
}

/* ───────── Layered sections (shared) ───────── */
.enclosure-frame,
.mechanism-frame,
.sealed-frame {
    position: relative;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: clamp(32px, 5vw, 64px);
    box-shadow: 0 0 30px var(--teal-glow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    transition: backdrop-filter 220ms ease, background 220ms ease, box-shadow 320ms ease;
}

.enclosure-frame {
    margin: 0 clamp(0px, 2vw, 24px);
    background: var(--glass-1);
    backdrop-filter: blur(var(--layer-blur-1)) saturate(120%);
    -webkit-backdrop-filter: blur(var(--layer-blur-1)) saturate(120%);
}

.mechanism-frame {
    margin: 0 clamp(10px, 4vw, 56px);
    background: var(--glass-2);
    backdrop-filter: blur(var(--layer-blur-2)) saturate(130%);
    -webkit-backdrop-filter: blur(var(--layer-blur-2)) saturate(130%);
}

.sealed-frame {
    margin: 0 clamp(20px, 6vw, 88px);
    background: var(--glass-3);
    backdrop-filter: blur(var(--layer-blur-3)) saturate(140%);
    -webkit-backdrop-filter: blur(var(--layer-blur-3)) saturate(140%);
    box-shadow: 0 0 50px rgba(0, 204, 170, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.10);
}

/* Section heads */
.section-head {
    max-width: 720px;
    margin-bottom: 48px;
}

.section-head-center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    color: var(--secure-teal);
    margin-bottom: 14px;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.5rem, 4vw, 2.8rem);
    line-height: 1.18;
    letter-spacing: -0.015em;
    color: var(--frost-text);
    margin-bottom: 16px;
}

.section-lede {
    font-size: 1.05rem;
    line-height: 1.75;
    color: rgba(224, 240, 240, 0.78);
    max-width: 600px;
}

.section-head-center .section-lede {
    margin-left: auto;
    margin-right: auto;
}

/* ───────── Enclosures (Section 02) ───────── */
.enclosure-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
}

.enclosure-card {
    position: relative;
    padding: 28px;
    border: 1px solid var(--glass-border-soft);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(6px) saturate(120%);
    -webkit-backdrop-filter: blur(6px) saturate(120%);
    transition: transform 360ms cubic-bezier(.22,.61,.36,1), background 320ms ease, border-color 320ms ease, box-shadow 320ms ease;
    overflow: hidden;
}

.enclosure-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 204, 170, 0.14), transparent 60%);
    opacity: 0;
    transition: opacity 320ms ease;
    pointer-events: none;
}

.enclosure-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(0, 204, 170, 0.35);
    box-shadow: 0 16px 40px rgba(0, 204, 170, 0.16);
}

.enclosure-card:hover::before {
    opacity: 1;
}

.card-num {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    color: var(--secure-teal);
    margin-bottom: 18px;
}

.card-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.4rem;
    color: var(--frost-text);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.card-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(224, 240, 240, 0.78);
    margin-bottom: 18px;
}

.card-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    color: rgba(224, 240, 240, 0.85);
}

.card-list li {
    position: relative;
    padding-left: 18px;
}

.card-list li::before {
    content: '';
    position: absolute;
    left: 0; top: 0.65em;
    width: 8px;
    height: 1px;
    background: var(--secure-teal);
}

/* ───────── Mechanism (Section 03) ───────── */
.mechanism-steps {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
    margin-bottom: 48px;
}

.step {
    position: relative;
    padding: 26px;
    border: 1px solid var(--glass-border-soft);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(8px) saturate(125%);
    -webkit-backdrop-filter: blur(8px) saturate(125%);
    transition: transform 360ms cubic-bezier(.22,.61,.36,1), background 320ms ease, border-color 320ms ease, box-shadow 320ms ease;
}

.step:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.10);
    border-color: rgba(0, 204, 170, 0.30);
    box-shadow: 0 12px 32px rgba(0, 204, 170, 0.14);
}

.step-index {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.22em;
    color: var(--secure-teal);
    padding: 4px 10px;
    border: 1px solid rgba(0, 204, 170, 0.35);
    border-radius: 999px;
    background: rgba(0, 204, 170, 0.08);
    margin-bottom: 18px;
}

.step-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.18rem;
    color: var(--frost-text);
    margin-bottom: 8px;
    letter-spacing: -0.005em;
}

.step-body p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(224, 240, 240, 0.78);
}

.mechanism-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 18px;
    padding-top: 32px;
    border-top: 1px solid var(--glass-border-soft);
}

.stat {
    text-align: center;
    padding: 14px 10px;
}

.stat-value {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    color: var(--frost-text);
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.stat-value span {
    font-size: 0.55em;
    color: var(--secure-teal);
    margin-left: 2px;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: rgba(224, 240, 240, 0.6);
    text-transform: uppercase;
}

/* ───────── Sealed core (Section 04) ───────── */
.sealed-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
    margin-bottom: 56px;
}

.sealed-keynote {
    padding: 32px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(10px) saturate(140%);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
    box-shadow: 0 12px 40px rgba(0, 204, 170, 0.10);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.keynote-badge {
    align-self: flex-start;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.24em;
    color: var(--secure-teal);
    padding: 6px 12px;
    border: 1px solid rgba(0, 204, 170, 0.35);
    border-radius: 999px;
    background: rgba(0, 204, 170, 0.08);
}

.keynote-line {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.05rem, 1.8vw, 1.35rem);
    line-height: 1.55;
    color: var(--frost-text);
    letter-spacing: -0.005em;
}

.keynote-meta {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid var(--glass-border-soft);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    color: rgba(224, 240, 240, 0.65);
}

.sealed-form {
    padding: 32px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px) saturate(140%);
    -webkit-backdrop-filter: blur(10px) saturate(140%);
    display: flex;
    flex-direction: column;
    gap: 14px;
    justify-content: center;
}

.form-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    color: var(--secure-teal);
    text-transform: uppercase;
}

.form-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
    background: rgba(0, 0, 0, 0.18);
    border: 1px solid var(--glass-border-soft);
    border-radius: 999px;
    padding: 6px;
    transition: border-color 240ms ease, box-shadow 240ms ease;
}

.form-row:focus-within {
    border-color: rgba(0, 204, 170, 0.6);
    box-shadow: 0 0 24px rgba(0, 204, 170, 0.25);
}

.form-row input {
    flex: 1;
    padding: 10px 16px;
    background: transparent;
    border: none;
    outline: none;
    color: var(--frost-text);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.form-row input::placeholder {
    color: rgba(224, 240, 240, 0.45);
}

.form-submit {
    flex-shrink: 0;
}

.form-note {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: rgba(224, 240, 240, 0.6);
    line-height: 1.5;
    transition: color 240ms ease;
}

.form-note.is-sealed {
    color: var(--secure-teal);
}

/* ───────── Footer (within sealed) ───────── */
.sealed-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding-top: 28px;
    border-top: 1px solid var(--glass-border-soft);
    flex-wrap: wrap;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-mark {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--frost-text);
    letter-spacing: 0.01em;
}

.footer-tag,
.footer-meta {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: rgba(224, 240, 240, 0.55);
    text-transform: uppercase;
}

.footer-nav {
    display: flex;
    gap: 22px;
    flex-wrap: wrap;
}

.footer-nav a {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    color: rgba(224, 240, 240, 0.7);
    text-transform: uppercase;
}

.footer-nav a:hover {
    color: var(--secure-teal);
}

/* ───────── Reveal animation ───────── */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    filter: blur(14px);
    transition:
        opacity 700ms cubic-bezier(.22,.61,.36,1),
        transform 700ms cubic-bezier(.22,.61,.36,1),
        filter 700ms cubic-bezier(.22,.61,.36,1);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

/* Section blur intensification on enter */
.layer-frame.is-passing .enclosure-frame,
.layer-frame.is-passing .mechanism-frame,
.layer-frame.is-passing .sealed-frame {
    /* placeholder for future direct selection — handled via JS classes below */
}

.enclosure-frame.is-passing,
.mechanism-frame.is-passing,
.sealed-frame.is-passing {
    backdrop-filter: blur(24px) saturate(140%);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
}

/* Indicator state coloring */
.layer-indicator[data-active="1"] .indicator-fill { background: linear-gradient(90deg, #66e0c8, var(--secure-teal)); }
.layer-indicator[data-active="2"] .indicator-fill { background: linear-gradient(90deg, var(--secure-teal), #00b893); }
.layer-indicator[data-active="3"] .indicator-fill { background: linear-gradient(90deg, #00b893, #00ccaa); }
.layer-indicator[data-active="4"] .indicator-fill {
    background: linear-gradient(90deg, var(--secure-teal), #b8fff0);
    box-shadow: 0 0 12px rgba(0, 204, 170, 0.45);
}

.layer-indicator[data-active="4"] {
    box-shadow: 0 0 36px rgba(0, 204, 170, 0.30);
}

/* ───────── Responsive ───────── */
@media (max-width: 880px) {
    .site-header {
        flex-wrap: wrap;
        gap: 14px;
    }

    .site-nav {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        gap: 18px;
    }

    .hero-stack {
        aspect-ratio: 4 / 5;
        max-height: none;
    }

    .hero-shell-middle { width: 90%; height: 86%; }
    .hero-shell-inner  { width: 82%; height: 74%; }

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

    .layer-indicator {
        top: 14px;
        right: 14px;
        min-width: 140px;
        padding: 10px 12px;
    }
}

@media (max-width: 560px) {
    .hero-meta {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .form-row {
        flex-direction: column;
        border-radius: var(--radius-md);
        padding: 10px;
        gap: 8px;
    }

    .form-row input {
        width: 100%;
    }

    .footer-nav { gap: 14px; }
}

/* ───────── Reduced motion ───────── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}