*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root { --ts: 0.5s; }

[data-theme="dark"] {
    --bg-0: #050506; --bg-1: #191a1a; --bg-2: #101112; --bg-3: #08080a;
    --card-bg: rgba(255,255,255,0.03); --card-border: rgba(255,255,255,0.08);
    --card-border-hover: rgba(255,255,255,0.14); --border: #1a1a22;
    --muted: #d7dde0; --body: #aeb8bb; --heading: #eeeef2; --accent: #00e5ff;
    --accent-mid: rgba(0,229,255,0.2); --accent-glow: rgba(0,229,255,0.4);
    --noise-opacity: 0.03; --nav-track: rgba(255,255,255,0.06);
    --nav-dot: rgba(255,255,255,0.15); --glass-bg: rgba(10,10,14,0.7);
    --glass-border: rgba(255,255,255,0.08);
    --focus: 2px solid #ffffff;
}

[data-theme="light"] {
    --bg-0: #f5f5f8; --bg-1: #eeeef2; --bg-2: #e6e6ec; --bg-3: #eeeef2;
    --card-bg: rgba(255,255,255,0.6); --card-border: rgba(0,0,0,0.08);
    --card-border-hover: rgba(0,0,0,0.14); --border: #d0d0d8;
    --muted: #747b7d; --body: #4a5558; --heading: #0a0a10; --accent: #0097a7;
    --accent-mid: rgba(0,151,167,0.15); --accent-glow: rgba(0,151,167,0.3);
    --noise-opacity: 0.018; --nav-track: rgba(0,0,0,0.06);
    --nav-dot: rgba(0,0,0,0.12); --glass-bg: rgba(255,255,255,0.4);
    --glass-border: rgba(0,0,0,0.06);
    --focus: 2px solid #0a0a10;
}

html { scroll-behavior: smooth; scrollbar-width: thin; scrollbar-color: var(--border) var(--bg-0); }

body {
    background: var(--bg-0);
    color: var(--body);
    font-family: 'Oxanium', sans-serif;
    font-size: 15px;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background var(--ts), color var(--ts);
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
    background-size: 256px;
    opacity: var(--noise-opacity);
    pointer-events: none;
    z-index: 9999;
}

::selection { background: var(--accent-mid); color: var(--heading); }
a { color: var(--accent); text-decoration: none; transition: opacity 0.3s; }
a:hover { opacity: 0.7; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: var(--focus); outline-offset: 3px; }

p strong { color: var(--heading); }
.hero-card p strong, .sentinel-desc strong { font-style: italic; }

.skip-link {
    position: absolute;
    left: -9999px;
    top: 12px;
    z-index: 1000;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--heading);
    padding: 10px 14px;
    border-radius: 6px;
}
.skip-link:focus { left: 12px; }

#sineCanvas {
    position: absolute;
    inset: 0;
    top: -10%;
    width: 101%;
    height: 110%;
    z-index: 0;
    margin-left: -1px;
    pointer-events: none;
}

.sticky-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 60px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 101;
    display: flex;
    align-items: center;
    padding: 0 32px;
    transform: translateY(-100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.sticky-header.visible { transform: translateY(0); }

.sticky-logo {
    font-size: 18px;
    letter-spacing: -0.02em;
    color: var(--heading);
    text-decoration: none;
    display: flex;
    align-items: center;
}
.sticky-logo:hover { opacity: 0.8; }
.brand-spook { font-weight: 700; }
.brand-lab { font-weight: 400; }
.brand-tm { font-size: 0.4em; color: var(--heading); vertical-align: super; margin-left: 1px; font-weight: 400; }

.side-controls {
    position: fixed;
    top: 32px;
    right: 10px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: top 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.side-controls.header-visible { top: 80px; }

.theme-toggle {
    width: 42px; height: 42px;
    border-radius: 50%;
    border: 0;
    background-color: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    margin-bottom: 20px;
}
.theme-toggle:hover { transform: scale(1.08); }
.theme-toggle svg { width: 20px; height: 20px; }

[data-theme="dark"] .theme-toggle svg { fill: none; stroke: #fff; stroke-width: 1.8; }
[data-theme="light"] .theme-toggle svg { fill: var(--accent); stroke: var(--accent); stroke-width: 1.8; }

.timeline-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}
.timeline-nav::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    width: 1px;
    background: var(--nav-track);
    transform: translateX(-50%);
}

.nav-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    border: 1.5px solid var(--nav-dot);
    background: var(--glass-bg);
    cursor: pointer;
    position: relative;
    z-index: 1;
    transition: all 0.3s;
    margin: 8px 0;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.nav-dot:first-child { margin-top: 0; }
.nav-dot:hover { border-color: var(--accent); transform: scale(1.2); }
.nav-dot.active {
    border-color: var(--accent);
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}
.nav-dot::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    pointer-events: none;
}
.nav-dot::after {
    content: attr(data-label);
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--muted);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.25s;
    pointer-events: none;
}
.nav-dot:hover::after { opacity: 1; color: var(--accent); }

.page { position: relative; z-index: 1; }

section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 5vw;
    position: relative;
}

.s-short { min-height: auto; padding: 80px 5vw; }

.s-bg-0 { background: var(--bg-0); }
.s-bg-1 { background: var(--bg-1); }
.s-bg-2 { background: var(--bg-2); }

.hero { align-items: center; text-align: left; padding-top: 6vh; padding-bottom: 10vh; overflow: hidden; }

.hero-brand {
    font-size: clamp(40px, 5vw, 70px);
    letter-spacing: -0.03em;
    color: var(--heading);
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
    max-width: 900px;
    width: 100%;
}

.hero-tagline {
    font-size: clamp(18px, 2vw, 24px);
    color: var(--heading);
    line-height: 1.6;
    font-style: italic;
    font-weight: 300;
    margin-bottom: 48px;
    text-align: left;
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
    max-width: 900px;
    width: 100%;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 32px 28px;
    backdrop-filter: blur(6px);
    transition: border-color 0.3s, transform 0.3s;
    text-align: left;
}
.glass-card:hover {
    border-color: var(--card-border-hover);
    transform: translateY(-2px);
}

.method-card { padding: 36px 32px; }
.firewall-box { padding: 28px 24px; height: 100%; display: flex; flex-direction: column; }

.epistemology-note {
    margin-top: 48px;
    padding: 24px 28px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-left: 3px solid var(--accent);
    border-radius: 0 8px 8px 0;
    backdrop-filter: blur(20px);
    max-width: 900px;
    text-align: left;
}

.hero-cards, .hypothesis-grid, .cred-grid, .taxonomy-grid, .method-cards, .audience-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    width: 100%;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    width: 100%;
}

.firewall-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: center;
    max-width: 900px;
    width: 100%;
    margin-top: 48px;
}

.section-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--accent);
    margin-bottom: 48px;
    display: flex;
    align-items: center;
    gap: 16px;
    font-weight: 600;
    max-width: 900px;
    width: 100%;
}
.section-label::before {
    content: '';
    width: 40px;
    height: 1px;
    background: var(--accent);
}

.sentinel-title {
    font-size: clamp(32px, 5vw, 72px);
    font-weight: 600;
    color: var(--heading);
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 40px;
    max-width: 900px;
    width: 100%;
}

.sentinel-desc {
    font-size: clamp(16px, 1.6vw, 19px);
    color: var(--body);
    max-width: 900px;
    width: 100%;
    line-height: 1.8;
    margin-bottom: 56px;
    text-align: left;
}

.stat-cell {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 32px 28px;
    backdrop-filter: blur(6px);
    transition: border-color 0.3s, transform 0.3s;
    text-align: left;
}
.stat-cell:hover { border-color: var(--card-border-hover); transform: translateY(-2px); }

.stat-value { font-size: 28px; font-weight: 600; color: var(--heading); margin-bottom: 4px; }
.stat-unit { font-weight: 400; font-size: 16px; color: var(--muted); }
.stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.15em; color: var(--muted); margin-top: 8px; }
.stat-context { font-size: 11px; color: var(--body); margin-top: 6px; line-height: 1.4; font-style: italic; }

.hero-card-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: 12px;
    font-weight: 600;
}

.hypothesis-title, .method-card-title, .taxonomy-title { font-size: 14px; font-weight: 600; color: var(--heading); margin-bottom: 8px; }
.cred-card h3 { font-size: 15px; font-weight: 600; color: var(--heading); margin-bottom: 10px; }

.hypothesis-desc, .cred-card p, .taxonomy-action { font-size: 13px; color: var(--body); line-height: 1.6; }
.method-card-text { font-size: 14px; color: var(--body); line-height: 1.75; }
.method-card-detail { font-size: 12px; color: var(--accent); margin-top: 12px; font-style: italic; }
.taxonomy-signature { font-size: 12px; color: var(--accent); margin-bottom: 12px; font-weight: 500; }

.principle { min-height: 70vh; align-items: center; text-align: center; }
.principle-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.3em; color: var(--muted); margin-bottom: 28px; font-weight: 600; }
.principle-text {
    font-family: 'Newsreader', serif;
    font-style: italic;
    font-size: clamp(36px, 5.5vw, 72px);
    font-weight: 300;
    color: var(--heading);
    letter-spacing: 0.01em;
    line-height: 1.2;
}
.principle-dash { display: block; width: 40px; height: 2px; background: var(--accent); margin: 28px auto; }
.principle-translation { font-size: 15px; letter-spacing: 0.08em; color: var(--body); }
.principle-status {
    font-size: clamp(28px, 3.5vw, 52px);
    font-family: 'Oxanium', sans-serif;
    font-style: normal;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.audience-box {
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    border-radius: 8px;
    padding: 32px 28px;
    backdrop-filter: blur(6px);
    transition: border-color 0.3s, transform 0.3s;
    text-align: left;
}
.audience-box:hover { border-color: var(--accent); transform: translateY(-2px); }

h4 { color: var(--accent); }
.audience-box h4 {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 20px;
}
.audience-box p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.75;
    margin-bottom: 16px;
}
.audience-box p:last-child {
    font-size: 13px;
    color: var(--accent);
    font-style: italic;
    margin-bottom: 0;
}

.firewall-divider {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
}

.hypothesis-icon svg,
.taxonomy-icon svg,
.method-card-icon svg,
.firewall-icon svg {
    width: 32px;
    height: 32px;
    margin-bottom: 12px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 1.2;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(28px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

.reveal-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-stagger.visible > * {
    opacity: 1;
    transform: translateY(0);
}

footer {
    padding: 48px 10vw;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--muted);
    background: var(--bg-0);
    gap: 12px;
}

@media (max-width: 768px) {
    section { padding: 80px 5vw; }
    .s-short { padding: 60px 5vw; }
    .hero { padding-top: 18vh; }
    .hero-cards, .hypothesis-grid, .cred-grid, .taxonomy-grid, .method-cards, .audience-container, .stat-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .firewall-container { grid-template-columns: 1fr; gap: 16px; }
    .firewall-divider { gap: 0; text-align: center; padding: 16px 0; order: 1; }
    .firewall-box:first-child { order: 0; }
    .firewall-box:last-child { order: 2; }
    .side-controls { top: 20px; right: 0; }
    .side-controls.header-visible { top: 72px; }
    .theme-toggle { width: 38px; height: 38px; }
    .nav-dot::after { display: none; }
    footer { flex-direction: column; text-align: center; }
    .epistemology-note { margin-top: 32px; padding: 20px 24px; }
    .sticky-header { padding: 0 20px; height: 56px; }
    .sticky-logo { font-size: 16px; }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .stat-grid { gap: 16px; }
}

.newsletter-block {
    margin-top: 48px;
    max-width: 480px;
    width: 100%;
    text-align: center;
}

.newsletter-intro {
    font-size: 13px;
    color: var(--body);
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.newsletter-row {
    display: flex;
    width: 100%;
    gap: 0;
}

.newsletter-input {
    flex: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-right: none;
    border-radius: 4px 0 0 4px;
    padding: 12px 16px;
    font-family: 'Oxanium', sans-serif;
    font-size: 13px;
    color: var(--heading);
    outline: none;
    transition: border-color 0.3s;
    backdrop-filter: blur(6px);
}

.newsletter-input::placeholder {
    color: var(--body);
    opacity: 0.5;
}

.newsletter-input:focus {
    border-color: var(--accent);
}

.newsletter-submit {
    background: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 0 4px 4px 0;
    padding: 12px 20px;
    font-family: 'Oxanium', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--bg-0);
    cursor: pointer;
    transition: opacity 0.3s;
    white-space: nowrap;
}

.newsletter-submit:hover { opacity: 0.85; }

.newsletter-consent {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 11px;
    color: var(--body);
    line-height: 1.6;
    text-align: left;
    cursor: pointer;
    max-width: 400px;
}

.consent-checkbox {
    margin-top: 2px;
    accent-color: var(--accent);
    flex-shrink: 0;
    width: 14px;
    height: 14px;
    cursor: pointer;
}

.newsletter-consent a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.newsletter-note {
    margin-top: 16px;
    font-size: 10px;
    letter-spacing: 0.1em;
    color: var(--body);
    opacity: 0.6;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}