/* ========================================
   simidiot.net — Swiss Sepia Noir
   ======================================== */

/* --- Color Variables --- */
:root {
    --aged-parchment: #f4ede4;
    --foxed-linen: #e8ddd0;
    --darkroom-brown: #2c2420;
    --faded-umber: #8a7660;
    --oxidized-copper: #7a6248;
    --amber-fixative: #c4943a;
    --developing-black: #1a1614;
    --bleached-bone: #faf6f0;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.15vw, 1.15rem);
    line-height: 1.85;
    color: var(--darkroom-brown);
    background-color: var(--aged-parchment);
    overflow-x: hidden;
}

.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* --- Deep Field (Background Layer) --- */
.deep-field {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.paper-grain {
    position: absolute;
    inset: 0;
    opacity: 0;
    mix-blend-mode: multiply;
    filter: url(#paper-grain);
    transition: opacity 1000ms ease;
}

.paper-grain.visible {
    opacity: 0.04;
}

.ghost-grid {
    position: absolute;
    inset: 0;
    opacity: 0;
    background-image: repeating-linear-gradient(
        to right,
        rgba(90, 70, 50, 0.06) 0px,
        rgba(90, 70, 50, 0.06) 0.5px,
        transparent 0.5px,
        transparent calc((100% - clamp(2rem, 8vw, 8rem) * 2) / 12)
    );
    background-position: clamp(2rem, 8vw, 8rem) 0;
    background-size: calc((100% - clamp(2rem, 8vw, 8rem) * 2) / 12) 100%;
    transition: opacity 1200ms ease;
}

.ghost-grid.visible {
    opacity: 1;
}

/* --- Intro Overlay --- */
#intro-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background-color: var(--developing-black);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 2000ms ease;
    pointer-events: none;
}

#intro-overlay.transitioning {
    background-color: transparent;
}

#intro-overlay.hidden {
    display: none;
}

.intro-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.intro-line {
    width: 40vw;
    height: 1px;
    background-color: var(--oxidized-copper);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 1200ms cubic-bezier(0.16, 1, 0.3, 1);
}

.intro-line.drawn {
    transform: scaleX(1);
}

.intro-domain {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-style: italic;
    font-weight: 400;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    color: var(--faded-umber);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 800ms ease, transform 800ms ease;
}

.intro-domain.visible {
    opacity: 1;
    transform: translateY(0);
}

.intro-content.migrating {
    position: fixed;
    transition: all 1400ms cubic-bezier(0.16, 1, 0.3, 1);
    top: clamp(2rem, 4vw, 4rem);
    left: clamp(2rem, 8vw, 8rem);
    align-items: flex-start;
}

/* --- Overlay Stratum (Geometric elements) --- */
.overlay-stratum {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1200ms ease;
}

.overlay-stratum.visible {
    opacity: 1;
}

.geo-concentric-1 {
    position: absolute;
    top: 30vh;
    right: 8vw;
    width: clamp(200px, 24vw, 340px);
    height: clamp(200px, 24vw, 340px);
    animation: pulse-rings 8s ease-in-out infinite alternate;
}

.geo-concentric-2 {
    position: absolute;
    top: 140vh;
    left: 4vw;
    width: clamp(160px, 18vw, 280px);
    height: clamp(160px, 18vw, 280px);
    animation: pulse-rings 8s ease-in-out infinite alternate-reverse;
}

@keyframes pulse-rings {
    0% { transform: scale(1); }
    100% { transform: scale(1.03); }
}

/* Angled Rule Fragments */
.angled-rule {
    position: absolute;
    width: 1px;
    background-color: var(--faded-umber);
    transform-origin: center;
}

.rule-1 {
    top: 25vh;
    left: 15vw;
    height: 80px;
    transform: rotate(30deg);
    animation: pivot-rule 12s ease-in-out infinite alternate;
}

.rule-2 {
    top: 55vh;
    right: 20vw;
    height: 60px;
    transform: rotate(45deg);
    animation: pivot-rule 12s ease-in-out infinite alternate-reverse;
}

.rule-3 {
    top: 75vh;
    left: 30vw;
    height: 100px;
    transform: rotate(60deg);
    animation: pivot-rule 12s ease-in-out infinite alternate;
}

.rule-4 {
    top: 45vh;
    left: 60vw;
    height: 50px;
    transform: rotate(90deg);
    animation: pivot-rule 12s ease-in-out infinite alternate-reverse;
}

@keyframes pivot-rule {
    0% { transform: rotate(var(--base-angle, 30deg)); }
    100% { transform: rotate(calc(var(--base-angle, 30deg) + 4deg)); }
}

.rule-1 { --base-angle: 30deg; }
.rule-2 { --base-angle: 45deg; }
.rule-3 { --base-angle: 60deg; }
.rule-4 { --base-angle: 90deg; }

/* Right-Angle Brackets */
.right-angle-bracket {
    position: absolute;
    width: 40px;
    height: 40px;
    border-left: 1px solid var(--faded-umber);
    border-bottom: 1px solid var(--faded-umber);
}

.bracket-1 {
    top: 20vh;
    right: 12vw;
}

.bracket-2 {
    top: 60vh;
    left: 8vw;
    transform: rotate(90deg);
}

.bracket-3 {
    top: 85vh;
    right: 25vw;
    transform: rotate(180deg);
}

/* --- Site Header --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    padding: clamp(1.5rem, 3vw, 2.5rem) clamp(2rem, 8vw, 8rem);
    pointer-events: none;
    opacity: 0;
    transition: opacity 600ms ease;
}

.site-header.visible {
    opacity: 1;
}

.header-grid {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.header-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.brand-name {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-style: italic;
    font-weight: 400;
    font-size: clamp(0.85rem, 1.2vw, 1.1rem);
    color: var(--darkroom-brown);
    letter-spacing: 0em;
}

.brand-rule {
    width: calc((100vw - clamp(2rem, 8vw, 8rem) * 2) / 12 * 4);
    height: 1px;
    background-color: var(--faded-umber);
}

/* Navigation Toggle (Bisected Circle) */
.nav-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    pointer-events: auto;
    position: relative;
}

.nav-toggle .bisected-circle circle {
    transition: stroke 300ms ease;
}

.nav-toggle .bisect-line {
    transform-origin: 20px 20px;
    animation: rotate-bisect 60s linear infinite;
    transition: stroke 300ms ease;
}

.nav-toggle:hover .bisected-circle circle,
.nav-toggle:hover .bisect-line {
    stroke: var(--amber-fixative);
}

.nav-toggle:hover .bisect-line {
    animation-play-state: paused;
}

.nav-toggle.clicked .bisect-line {
    animation: rapid-rotate 300ms ease-out forwards;
}

@keyframes rotate-bisect {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes rapid-rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(180deg); }
}

/* --- Navigation Panel --- */
.nav-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    max-width: 85vw;
    background-color: var(--developing-black);
    z-index: 100;
    transform: translateX(100%);
    transition: transform 500ms cubic-bezier(0.33, 1, 0.68, 1);
    padding: clamp(2rem, 4vw, 4rem) clamp(2rem, 4vw, 3rem);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.nav-panel.open {
    transform: translateX(0);
}

.nav-close {
    position: absolute;
    top: clamp(1.5rem, 3vw, 2.5rem);
    right: clamp(1.5rem, 3vw, 2rem);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    opacity: 0.7;
    transition: opacity 300ms ease;
}

.nav-close:hover {
    opacity: 1;
}

.nav-links {
    list-style: none;
}

.nav-link-item {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 400ms ease, transform 400ms ease;
}

.nav-panel.open .nav-link-item {
    opacity: 1;
    transform: translateX(0);
}

.nav-link-item:nth-child(1) { transition-delay: 560ms; }
.nav-link-item:nth-child(2) { transition-delay: 620ms; }
.nav-link-item:nth-child(3) { transition-delay: 680ms; }
.nav-link-item:nth-child(4) { transition-delay: 740ms; }
.nav-link-item:nth-child(5) { transition-delay: 800ms; }

.nav-link {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1.1rem, 1.4vw, 1.3rem);
    color: var(--bleached-bone);
    text-decoration: none;
    line-height: 2.8;
    display: block;
    position: relative;
    transition: color 250ms ease;
}

.nav-link::before {
    content: attr(data-label);
    font-family: 'DM Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faded-umber);
    position: absolute;
    left: -2rem;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 300ms ease;
}

.nav-link:hover {
    color: var(--amber-fixative);
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 99;
    background-color: rgba(26, 22, 20, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity 400ms ease;
}

.nav-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

/* --- Content Grid --- */
.content-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0 clamp(1.2rem, 2.5vw, 2.4rem);
    padding: 0 clamp(2rem, 8vw, 8rem);
    max-width: 100%;
}

/* --- Hero Section --- */
.hero-section {
    grid-column: 1 / -1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 20vh;
    padding-bottom: 10vh;
}

.hero-content {
    grid-column: 1 / 8;
    max-width: calc((100vw - clamp(2rem, 8vw, 8rem) * 2) / 12 * 7);
    opacity: 0.08;
    transform: translateY(30px);
    transition: opacity 900ms cubic-bezier(0.16, 1, 0.3, 1), transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-content.revealed {
    opacity: 1;
    transform: translateY(0);
}

.hero-heading {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 700;
    font-size: clamp(2.6rem, 6.5vw, 5.8rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--darkroom-brown);
    margin-bottom: clamp(1.2rem, 2vw, 2rem);
}

.hero-subtext {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.15vw, 1.15rem);
    line-height: 1.85;
    max-width: 38ch;
    color: var(--darkroom-brown);
}

.section-punctuation {
    margin-top: clamp(3rem, 6vh, 5rem);
    margin-left: calc((100vw - clamp(2rem, 8vw, 8rem) * 2) / 12 * 3);
    opacity: 0.5;
}

/* --- Entry Label (DM Mono metadata) --- */
.entry-label {
    font-family: 'DM Mono', monospace;
    font-size: clamp(0.7rem, 0.85vw, 0.85rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faded-umber);
    display: block;
    margin-bottom: clamp(0.8rem, 1.2vw, 1.2rem);
}

/* --- Archive Entry Sections --- */
.archive-entry {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0 clamp(1.2rem, 2.5vw, 2.4rem);
    padding: clamp(2rem, 4vh, 4rem) 0;
}

.archive-entry .entry-content {
    grid-column: 2 / 7;
    opacity: 0.08;
    transform: translateY(30px);
    transition: opacity 900ms cubic-bezier(0.16, 1, 0.3, 1), transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 1px 0 rgba(90, 70, 50, 0.08);
    padding: clamp(1.5rem, 2.5vw, 2.5rem);
    background-color: transparent;
    transition: opacity 900ms cubic-bezier(0.16, 1, 0.3, 1), transform 900ms cubic-bezier(0.16, 1, 0.3, 1), box-shadow 400ms ease;
}

.archive-entry .entry-content.revealed {
    opacity: 1;
    transform: translateY(0);
}

.archive-entry .entry-content:hover {
    box-shadow: 0 2px 8px rgba(90, 70, 50, 0.1);
}

.archive-entry.entry-alt .entry-content {
    grid-column: 4 / 9;
}

.archive-entry .entry-geo {
    grid-column: 8 / 11;
    position: relative;
    opacity: 0;
    transition: opacity 600ms ease 200ms;
}

.archive-entry .entry-content.revealed ~ .entry-geo {
    opacity: 1;
}

.archive-entry.entry-alt .entry-geo {
    grid-column: 10 / 12;
}

.entry-heading {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 3.2vw, 2.6rem);
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--darkroom-brown);
    margin-bottom: clamp(1rem, 1.5vw, 1.5rem);
}

.entry-body p {
    max-width: 38ch;
    margin-bottom: 1.2em;
    color: var(--darkroom-brown);
}

.entry-body p:last-child {
    margin-bottom: 0;
}

.entry-body em {
    font-style: italic;
    color: var(--oxidized-copper);
}

.entry-rule {
    margin-top: clamp(1.5rem, 2.5vw, 2.5rem);
    height: 1px;
    width: 60%;
    background: linear-gradient(to right, var(--faded-umber), transparent);
}

/* Entry geometric annotations */
.entry-bracket {
    position: absolute;
    top: 2rem;
    left: 1rem;
    width: 30px;
    height: 30px;
    border-left: 1px solid var(--faded-umber);
    border-bottom: 1px solid var(--faded-umber);
    transition: border-color 400ms ease;
}

.entry-bracket.bracket-inverted {
    border-left: none;
    border-bottom: none;
    border-right: 1px solid var(--faded-umber);
    border-top: 1px solid var(--faded-umber);
}

.archive-entry .entry-content:hover ~ .entry-geo .entry-bracket {
    border-color: var(--amber-fixative);
}

.entry-rule-fragment {
    position: absolute;
    width: 1px;
    height: 60px;
    background-color: var(--faded-umber);
    top: 5rem;
    left: 3rem;
    transition: background-color 400ms ease;
}

.entry-rule-fragment.frag-45 {
    transform: rotate(45deg);
    left: 2rem;
}

.entry-rule-fragment.frag-30 {
    transform: rotate(30deg);
    top: 10rem;
    left: 0.5rem;
}

.entry-rule-fragment.frag-60 {
    transform: rotate(60deg);
}

.archive-entry .entry-content:hover ~ .entry-geo .entry-rule-fragment {
    background-color: var(--amber-fixative);
}

/* --- Classification List --- */
.classification-list {
    margin-top: clamp(1.5rem, 2.5vw, 2rem);
}

.classification-item {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    gap: 0 clamp(0.8rem, 1.2vw, 1.2rem);
    padding: clamp(0.8rem, 1.2vw, 1.2rem) 0;
    border-bottom: 1px solid rgba(138, 118, 96, 0.15);
}

.classification-item:last-child {
    border-bottom: none;
}

.classification-code {
    font-family: 'DM Mono', monospace;
    font-size: clamp(0.7rem, 0.85vw, 0.85rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--oxidized-copper);
    grid-row: 1 / 3;
    align-self: start;
    padding-top: 0.15em;
}

.classification-name {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 700;
    font-size: clamp(1.1rem, 1.8vw, 1.5rem);
    color: var(--darkroom-brown);
    letter-spacing: -0.02em;
}

.classification-desc {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-weight: 400;
    font-size: clamp(0.85rem, 1vw, 0.95rem);
    line-height: 1.7;
    color: var(--faded-umber);
    max-width: 38ch;
    margin-top: 0.25em;
}

/* --- Section Separator --- */
.section-separator {
    grid-column: 1 / -1;
    height: clamp(6rem, 14vh, 12rem);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-left: calc((100vw - clamp(2rem, 8vw, 8rem) * 2) / 12 * 5);
}

.separator-mark {
    opacity: 0.5;
}

/* --- Site Footer --- */
.site-footer {
    grid-column: 1 / -1;
    padding: clamp(4rem, 8vh, 8rem) 0 clamp(2rem, 4vh, 4rem);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-label {
    font-family: 'DM Mono', monospace;
    font-size: clamp(0.7rem, 0.85vw, 0.85rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faded-umber);
}

.footer-date {
    font-family: 'DM Mono', monospace;
    font-size: clamp(0.65rem, 0.75vw, 0.75rem);
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faded-umber);
    opacity: 0.6;
}

.footer-rule {
    width: calc((100vw - clamp(2rem, 8vw, 8rem) * 2) / 12 * 3);
    height: 1px;
    background: linear-gradient(to right, var(--faded-umber), transparent);
}

.footer-bisected-circle {
    opacity: 0.3;
    margin-top: 1rem;
}

/* --- Text Links (hover state) --- */
a {
    color: var(--darkroom-brown);
    text-decoration: none;
    background-image: linear-gradient(var(--amber-fixative), var(--amber-fixative));
    background-position: 0% 100%;
    background-repeat: no-repeat;
    background-size: 0% 1px;
    transition: background-size 300ms ease, color 250ms ease;
}

a:hover {
    color: var(--amber-fixative);
    background-size: 100% 1px;
}

/* --- Radial Reveal (for intro background transition) --- */
.radial-reveal {
    position: fixed;
    inset: 0;
    z-index: 999;
    pointer-events: none;
    background: radial-gradient(ellipse at 50% 40%, var(--aged-parchment) 0%, var(--developing-black) 100%);
    background-size: 100% 100%;
    opacity: 0;
    transition: opacity 300ms ease;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .content-grid {
        padding: 0 clamp(1.2rem, 5vw, 2rem);
    }

    .archive-entry .entry-content {
        grid-column: 1 / -1;
    }

    .archive-entry.entry-alt .entry-content {
        grid-column: 1 / -1;
    }

    .archive-entry .entry-geo {
        display: none;
    }

    .archive-entry.entry-alt .entry-geo {
        display: none;
    }

    .hero-content {
        max-width: 100%;
    }

    .brand-rule {
        width: 40vw;
    }

    .site-header {
        padding: 1.2rem clamp(1.2rem, 5vw, 2rem);
    }

    .section-separator {
        padding-left: 20%;
    }

    .section-punctuation {
        margin-left: 20%;
    }

    .geo-concentric-1,
    .geo-concentric-2 {
        display: none;
    }

    .overlay-stratum .angled-rule,
    .overlay-stratum .right-angle-bracket {
        display: none;
    }

    .classification-item {
        grid-template-columns: 1fr;
    }

    .classification-code {
        grid-row: auto;
        margin-bottom: 0.25rem;
    }
}

@media (max-width: 480px) {
    .hero-heading {
        font-size: clamp(2rem, 10vw, 3rem);
    }

    .entry-heading {
        font-size: clamp(1.3rem, 5vw, 1.8rem);
    }
}