/* === DESIGN TOKENS === */
:root {
    --bg:           #1a1917;
    --bg-card:      rgba(255, 255, 255, 0.04);
    --text:         #f5f0e8;
    --text-muted:   rgba(245, 240, 232, 0.55);
    --accent:       #554494;
    --accent-light: rgba(85, 68, 148, 0.25);
    --border:       rgba(245, 240, 232, 0.08);
    --serif:        'Playfair Display', Georgia, serif;
    --sans:         'Inter', system-ui, sans-serif;
    --nav-h:        72px;
    --max-w:        1200px;
    --radius:       10px;
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* === TYPOGRAPHY === */
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; font-weight: 700; }
p { color: var(--text-muted); }

/* === LAYOUT HELPERS === */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 4rem; }
.section-tag {
    font-family: var(--sans);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
}
.section-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0 4rem;
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    font-family: var(--sans);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: var(--accent);
    color: var(--text);
}
.btn-primary:hover { background: #6655aa; }
.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-ghost:hover {
    border-color: rgba(245, 240, 232, 0.3);
    color: var(--text);
}

/* === NAVIGATION === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 4rem;
    background: rgba(26, 25, 23, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 200;
    transition: transform 0.3s ease;
}
.site-header.hidden { transform: translateY(-100%); }
.site-logo {
    font-family: var(--sans);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--text);
}
.nav-list {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}
.nav-list li a {
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s ease;
}
.nav-list li a:hover { color: var(--text); }
.nav-toggle { display: none; }

/* === REVEAL ANIMATION === */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === HERO === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-h) + 4rem) 4rem 6rem;
}
.hero-inner { max-width: 780px; }
.hero-title {
    font-size: clamp(2.8rem, 6vw, 5.2rem);
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    margin-bottom: 1.5rem;
}
.hero-subtitle {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 2.5rem;
}
.hero-ctas { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* === THREE PILLARS === */
.pillars {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.pillar {
    padding: 3.5rem 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border-right: 1px solid var(--border);
    transition-delay: calc(var(--i, 0) * 0.1s);
}
.pillar:last-child { border-right: none; }
.pillar-icon {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}
.pillar-name {
    font-family: var(--sans);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.75rem;
}
.pillar-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* === KEEPER SPOTLIGHT === */
.keeper-spotlight {
    padding: 8rem 4rem;
}
.spotlight-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

/* PHONE FRAME */
.phone-frame {
    width: 240px;
    height: 480px;
    border: 1.5px solid rgba(245, 240, 232, 0.15);
    border-radius: 36px;
    background: rgba(255,255,255,0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin: 0 auto;
}
.phone-frame::before {
    content: '';
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    border-radius: 3px;
    background: rgba(245, 240, 232, 0.12);
}
.phone-screen {
    padding: 2rem 1.5rem;
    width: 100%;
}
.phone-app-name {
    font-family: var(--serif);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    margin-bottom: 2rem;
}
.phone-status, .phone-checkin {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.status-label {
    font-size: 0.6rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.status-value.active { font-size: 1rem; font-weight: 600; color: #7ecb8f; }
.checkin-value { font-size: 1.4rem; font-weight: 700; color: var(--text); }

.spotlight-tag {
    font-family: var(--sans);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1rem;
}
.spotlight-title {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    color: var(--text);
    margin-bottom: 1.25rem;
    line-height: 1.25;
}
.spotlight-desc {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.spotlight-tech {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
    opacity: 0.7;
}

/* === LATEST LETTER === */
.latest-letter {
    padding: 7rem 4rem;
    border-top: 1px solid var(--border);
}
.latest-inner { max-width: 640px; margin: 0 auto; text-align: center; }
.latest-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    color: var(--text);
    margin-bottom: 1rem;
}
.latest-title a { color: var(--text); transition: opacity 0.2s; }
.latest-title a:hover { opacity: 0.75; }
.latest-excerpt { font-size: 0.95rem; line-height: 1.75; margin-bottom: 1.5rem; }
.read-link {
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    color: var(--text);
    border-bottom: 1px solid rgba(245,240,232,0.3);
    padding-bottom: 2px;
    transition: border-color 0.2s;
}
.read-link:hover { border-color: var(--text); }

/* === NEWSLETTER === */
.newsletter {
    padding: 6rem 4rem;
    border-top: 1px solid var(--border);
}
.newsletter-inner { max-width: 480px; margin: 0 auto; text-align: center; }
.newsletter-title {
    font-family: var(--serif);
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 0.75rem;
}
.newsletter-desc, .newsletter p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 2rem; }
.newsletter-form { display: flex; gap: 0.75rem; }
.newsletter-input {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.75rem 1rem;
    color: var(--text);
    font-family: var(--sans);
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
}
.newsletter-input::placeholder { color: var(--text-muted); }
.newsletter-input:focus { border-color: rgba(245,240,232,0.3); }

/* === FOOTER === */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 4rem;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; text-align: center; }
.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}
.footer-nav a {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    transition: color 0.2s;
}
.footer-nav a:hover { color: var(--text); }
.footer-legal {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}
.footer-legal a { font-size: 0.75rem; color: var(--text-muted); }
.footer-legal a:hover { color: var(--text); }
.footer-divider { color: var(--text-muted); }
.footer-signature {
    font-family: var(--serif);
    font-size: 1rem;
    font-style: italic;
    color: var(--text);
    margin-bottom: 0.5rem;
}
.footer-copy { font-size: 0.72rem; color: var(--text-muted); }

/* === PAGE HERO === */
.page-hero {
    padding: calc(var(--nav-h) + 6rem) 4rem 5rem;
    text-align: center;
}
.page-title {
    font-size: clamp(2.4rem, 5vw, 4rem);
    color: var(--text);
    margin-bottom: 1rem;
}
.page-subtitle { font-size: 1rem; line-height: 1.75; max-width: 560px; margin: 0 auto; }

/* === APPS PAGE === */
.app-detail { padding: 6rem 4rem; }
.app-detail-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 6rem;
    align-items: start;
}
.app-name {
    font-size: 2.8rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}
.app-tagline {
    font-size: 0.9rem;
    color: var(--accent);
    letter-spacing: 0.05em;
    margin-bottom: 2.5rem;
    font-family: var(--sans);
}
.app-section { margin-bottom: 2rem; }
.app-section-title {
    font-family: var(--sans);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}
.app-section p { font-size: 0.95rem; line-height: 1.75; }
.app-cta { margin-top: 2.5rem; }

.app-card-section { padding: 6rem 4rem; }
.app-card {
    max-width: var(--max-w);
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 4rem;
}
.app-card p { font-size: 0.95rem; line-height: 1.75; margin-bottom: 1.5rem; }

.app-coming-soon { padding: 6rem 4rem; }
.coming-soon-card {
    max-width: var(--max-w);
    margin: 0 auto;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 4rem;
    text-align: center;
}
.coming-soon-label {
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.coming-soon-title {
    font-size: 1.8rem;
    color: var(--text);
    margin-bottom: 2rem;
    font-style: italic;
}
.coming-soon-tags { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.tag, .tech-tag {
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.35rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--text-muted);
}

/* === JOURNAL PAGE === */
.journal-hero {
    padding: calc(var(--nav-h) + 6rem) 4rem 5rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}
.journal-main-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}
.journal-subtitle { font-size: 0.95rem; line-height: 1.75; max-width: 560px; margin: 0 auto; }

.journal-list { max-width: 720px; margin: 0 auto; padding: 4rem; }
.letter-item {
    display: grid;
    grid-template-columns: 2.5rem 1fr;
    gap: 1.5rem;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    transition-delay: calc(var(--i, 0) * 0.1s);
}
.letter-item:last-child { border-bottom: none; }
.letter-number {
    font-family: var(--serif);
    font-size: 1.1rem;
    color: var(--text-muted);
    padding-top: 0.2rem;
}
.letter-title {
    font-size: 1.3rem;
    color: var(--text);
    margin-bottom: 0.4rem;
    font-weight: 600;
}
.letter-title a { color: var(--text); transition: opacity 0.2s; }
.letter-title a:hover { opacity: 0.75; }
.letter-date { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.75rem; }
.letter-excerpt { font-size: 0.9rem; line-height: 1.7; margin-bottom: 1rem; }
.no-letters { text-align: center; padding: 4rem 0; color: var(--text-muted); font-style: italic; }

/* === LAB PAGE === */
.lab-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    padding: 5rem 4rem;
    max-width: calc(var(--max-w) + 8rem);
    margin: 0 auto;
}
.glass-card {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    transition-delay: calc(var(--i, 0) * 0.12s);
}
.lab-card-tag {
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.75rem;
}
.lab-card-title {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 1rem;
    font-weight: 600;
}
.lab-card-desc { font-size: 0.85rem; line-height: 1.7; margin-bottom: 1.5rem; }
.lab-card-status { font-size: 0.75rem; color: var(--text-muted); }
.status-active { color: #7ecb8f; }
.status-research { color: #f0c27f; }

/* === ABOUT PAGE === */
.about-hero {
    padding: calc(var(--nav-h) + 6rem) 4rem 5rem;
    max-width: 800px;
    margin: 0 auto;
}
.about-title {
    font-size: clamp(2.4rem, 5vw, 4rem);
    color: var(--text);
    margin-bottom: 1.5rem;
}
.about-antivision { font-size: 1.05rem; line-height: 1.8; max-width: 640px; }

.about-manifesto {
    padding: 5rem 4rem;
    border-top: 1px solid var(--border);
}
.manifesto-inner { max-width: 800px; margin: 0 auto; }
.manifesto-heading {
    font-size: 2rem;
    color: var(--text);
    margin-bottom: 1.5rem;
}
.manifesto-intro { font-size: 0.95rem; margin-bottom: 2.5rem; }
.manifesto-principles {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.principle h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 0.75rem;
    font-family: var(--sans);
    font-weight: 600;
    letter-spacing: 0.05em;
}
.principle p { font-size: 0.9rem; line-height: 1.7; }

.about-story {
    padding: 5rem 4rem;
    border-top: 1px solid var(--border);
}
.about-story-inner { max-width: 800px; margin: 0 auto; }
.manifesto-quote {
    font-family: var(--serif);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--text);
    line-height: 1.8;
    border-left: 2px solid var(--accent);
    padding-left: 2rem;
    margin-bottom: 3rem;
}
.tech-stack { margin-bottom: 2.5rem; }
.tech-label { font-size: 0.75rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.75rem; }
.tech-tags { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.about-cta p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 1.5rem; }

/* === CONTACT PAGE === */
.contact-page {
    min-height: calc(100vh - var(--nav-h));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-h) + 4rem) 4rem 6rem;
    text-align: center;
}
.contact-inner { max-width: 560px; }
.contact-desc { font-size: 1rem; color: var(--text-muted); margin-bottom: 2rem; }
.contact-email {
    font-family: var(--serif);
    font-size: 1.4rem;
    color: var(--text);
    border-bottom: 1px solid rgba(245,240,232,0.3);
    padding-bottom: 4px;
    transition: border-color 0.2s;
}
.contact-email:hover { border-color: var(--text); }

/* === SINGLE LETTER === */
.single-letter { padding: calc(var(--nav-h) + 4rem) 4rem 6rem; }
.single-letter-inner { max-width: 680px; margin: 0 auto; }
.back-link {
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 2rem;
    transition: color 0.2s;
}
.back-link:hover { color: var(--text); }
.single-letter-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: var(--text);
    margin-bottom: 0.75rem;
}
.single-letter-date { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 3rem; }
.letter-content { font-size: 1rem; line-height: 1.85; }
.letter-content p { color: var(--text-muted); margin-bottom: 1.5rem; }
.letter-content h2, .letter-content h3 { color: var(--text); margin-bottom: 0.75rem; margin-top: 2rem; }
.letter-footer { margin-top: 4rem; border-top: 1px solid var(--border); padding-top: 2rem; }
.letter-footer-sig { font-family: var(--serif); font-style: italic; color: var(--text); margin-bottom: 1rem; }

.newsletter--journal,
.newsletter--single { background: rgba(255,255,255,0.02); }
.main-content { padding: calc(var(--nav-h) + 4rem) 4rem 6rem; max-width: var(--max-w); margin: 0 auto; }
.page-content h1 { font-size: 2.5rem; color: var(--text); margin-bottom: 2rem; }
.page-content p { margin-bottom: 1.25rem; }

/* === RESPONSIVE === */
@media (max-width: 900px) {
    .site-header { padding: 0 2rem; }
    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
        z-index: 300;
    }
    .nav-toggle span {
        display: block;
        width: 22px;
        height: 1.5px;
        background: var(--text);
        transition: all 0.3s;
    }
    .primary-nav {
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: var(--bg);
        display: flex;
        align-items: center;
        justify-content: flex-start;
        overflow-y: auto;
        padding: 12rem 2rem 4rem;
        transform: translateX(100%);
        transition: transform 0.35s ease;
        z-index: 250;
    }
    .primary-nav.open { transform: translateX(0); }
    .nav-list { flex-direction: column; gap: 2.5rem; text-align: center; width: 100%; }
    .nav-list li a { font-size: 1.2rem; }

    .hero { padding: calc(var(--nav-h) + 3rem) 2rem 4rem; }
    .pillars { grid-template-columns: 1fr; border: none; }
    .pillar { border-right: none; border-bottom: 1px solid var(--border); padding: 2.5rem 2rem; }
    .pillar:last-child { border-bottom: none; }

    .spotlight-inner { grid-template-columns: 1fr; gap: 3rem; }
    .phone-frame { width: 200px; height: 400px; }

    .app-detail-inner { grid-template-columns: 1fr; gap: 3rem; }
    .manifesto-principles { grid-template-columns: 1fr; gap: 1.5rem; }
    .lab-grid { grid-template-columns: 1fr; }

    .keeper-spotlight, .app-detail, .app-card-section,
    .app-coming-soon, .latest-letter, .newsletter,
    .about-hero, .about-manifesto, .about-story,
    .journal-list, .contact-page, .single-letter,
    .lab-grid, .page-hero, .journal-hero { padding-left: 2rem; padding-right: 2rem; }

    .section-divider { margin: 0 2rem; }
    .newsletter-form { flex-direction: column; }
    .footer-nav { flex-wrap: wrap; gap: 1.25rem; }
}