/* ============================================================
   cbdc.studio — Styles
   Avant-garde numismatic ceremony / Diagonal-sections layout
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
    --deep-vault: #0f0f1e;
    --anthracite-slate: #1c1c2e;
    --sovereign-teal: #1a6b5a;
    --proclamation-coral: #e06850;
    --mint-gold: #c9a84c;
    --parchment-ivory: #f2ece0;
    --vellum-white: #e8e0d0;
    --fog-silver: #8a8a98;

    --font-display: 'Dela Gothic One', sans-serif;
    --font-secondary: 'Anybody', sans-serif;
    --font-body: 'Cormorant Garamond', serif;
    --font-accent: 'Space Grotesk', sans-serif;

    --bounce-distance: 40px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background: var(--deep-vault);
    color: var(--vellum-white);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.95rem, 1.3vw, 1.15rem);
    line-height: 1.72;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---- Reusable Keyframes ---- */
@keyframes bounceEnter {
    0% {
        transform: translateY(var(--bounce-distance));
        opacity: 0;
    }
    60% {
        transform: translateY(-8px);
        opacity: 1;
    }
    80% {
        transform: translateY(3px);
    }
    100% {
        transform: translateY(0);
    }
}

@keyframes bounceEnterScale {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    60% {
        transform: scale(1.08);
        opacity: 1;
    }
    80% {
        transform: scale(0.97);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes drawLine {
    to {
        stroke-dashoffset: 0;
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes marqueeScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes wdthExpand {
    from { font-variation-settings: 'wdth' 50; }
    to { font-variation-settings: 'wdth' 125; }
}

@keyframes seamDashReveal {
    from { stroke-dasharray: 12 4; }
    to { stroke-dasharray: 16 0; }
}

@keyframes plateEnter {
    0% {
        transform: translateY(60px) skewY(-8deg);
        opacity: 0;
    }
    60% {
        transform: translateY(-8px) skewY(-4deg);
        opacity: 1;
    }
    80% {
        transform: translateY(3px) skewY(-4deg);
    }
    100% {
        transform: translateY(0) skewY(0);
        opacity: 1;
    }
}

/* ---- Zellige Background Pattern ---- */
.plate-light {
    background-color: var(--parchment-ivory);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cg fill='none' stroke='%23c9a84c' stroke-width='0.5' opacity='0.12'%3E%3Cpolygon points='40,0 50,10 40,20 30,10'/%3E%3Cpolygon points='0,40 10,30 20,40 10,50'/%3E%3Cpolygon points='80,40 70,30 60,40 70,50'/%3E%3Cpolygon points='40,80 50,70 40,60 30,70'/%3E%3Cpolygon points='40,40 50,30 40,20 30,30'/%3E%3Cpolygon points='40,40 50,50 40,60 30,50'/%3E%3Cpolygon points='40,40 30,30 20,40 30,50'/%3E%3Cpolygon points='40,40 50,30 60,40 50,50'/%3E%3Cpolygon points='20,0 10,10 20,20 30,10'/%3E%3Cpolygon points='60,0 50,10 60,20 70,10'/%3E%3Cpolygon points='0,20 10,10 0,0'/%3E%3Cpolygon points='80,20 70,10 80,0'/%3E%3Cpolygon points='20,80 10,70 20,60 30,70'/%3E%3Cpolygon points='60,80 50,70 60,60 70,70'/%3E%3Cpolygon points='0,60 10,50 0,40'/%3E%3Cpolygon points='80,60 70,50 80,40'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 80px 80px;
}

/* ================================================================
   HERO: THE PROCLAMATION STAGE
   ================================================================ */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: linear-gradient(195deg, var(--deep-vault) 0%, var(--anthracite-slate) 100%);
}

.hero-bg-upper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--deep-vault);
    clip-path: polygon(0 0, 100% 0, 0 100%);
    z-index: 1;
}

.hero-bg-lower {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--sovereign-teal);
    clip-path: polygon(100% 0, 100% 100%, 0 100%);
    z-index: 1;
}

.hero-diagonal-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.diagonal-draw {
    animation: drawLine 900ms ease-out forwards;
}

.hero-content {
    position: relative;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 2rem;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7vw, 6rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--vellum-white);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    min-height: 1.2em;
}

.hero-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(var(--bounce-distance));
}

.hero-title .letter.animate {
    animation: bounceEnter 600ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.hero-subtitle {
    font-family: var(--font-secondary);
    font-size: clamp(1.1rem, 2.5vw, 1.8rem);
    font-weight: 700;
    font-variation-settings: 'wdth' 50;
    color: var(--vellum-white);
    opacity: 0;
    margin-top: 1.5rem;
    letter-spacing: 0.04em;
}

.hero-subtitle.animate {
    animation: fadeIn 500ms ease forwards, wdthExpand 1200ms ease forwards;
}

/* Hero Watermark */
.watermark-emblem {
    position: absolute;
    width: 400px;
    height: 400px;
    pointer-events: none;
    z-index: 0;
}

.hero-watermark {
    top: 15%;
    right: -5%;
    opacity: 0.08;
    color: var(--anthracite-slate);
}

.watermark-svg {
    width: 100%;
    height: 100%;
}

/* ================================================================
   DIAGONAL PLATES
   ================================================================ */
.diagonal-plate {
    position: relative;
    padding: 8rem 2rem 10rem;
    margin-top: -60px;
    overflow: hidden;
}

.plate-dark {
    background: var(--deep-vault);
    color: var(--vellum-white);
    clip-path: polygon(0 60px, 100% 0, 100% calc(100% - 60px), 0 100%);
}

.plate-dark .plate-icon {
    color: var(--sovereign-teal);
}

.plate-dark .watermark-emblem {
    color: var(--anthracite-slate);
    opacity: 0.08;
    top: 10%;
    right: -5%;
}

.plate-light {
    color: var(--deep-vault);
    clip-path: polygon(0 0, 100% 60px, 100% 100%, 0 calc(100% - 60px));
}

.plate-light .plate-icon {
    color: var(--deep-vault);
}

.plate-seam {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--mint-gold);
    background-image: repeating-linear-gradient(
        90deg,
        var(--mint-gold) 0px,
        var(--mint-gold) 12px,
        transparent 12px,
        transparent 16px
    );
    z-index: 5;
    transition: background-image 600ms ease;
}

.plate-seam.seam-active {
    background-image: none;
    background: var(--mint-gold);
}

.plate-inner {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    opacity: 0;
    transform: translateY(60px);
}

.plate-inner.visible {
    animation: bounceEnter 700ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    --bounce-distance: 60px;
}

.plate-heading {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    font-weight: 400;
    letter-spacing: 0.04em;
    margin-bottom: 1.5rem;
}

.plate-text {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.3vw, 1.15rem);
    line-height: 1.72;
    max-width: 600px;
}

/* Plate Icons */
.plate-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
}

.plate-icon.icon-visible {
    animation: bounceEnter 500ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    --bounce-distance: 20px;
}

.plate-icon svg {
    width: 100%;
    height: 100%;
}

/* ================================================================
   KINETIC TYPOGRAPHY MOMENTS
   ================================================================ */
.kinetic-moment {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: 4rem 2rem;
    overflow: hidden;
    margin-top: -60px;
}

.kinetic-moment--dark {
    background: var(--deep-vault);
    clip-path: polygon(0 60px, 100% 0, 100% calc(100% - 60px), 0 100%);
}

.kinetic-moment--light {
    background: var(--parchment-ivory);
    clip-path: polygon(0 0, 100% 60px, 100% 100%, 0 calc(100% - 60px));
}

.kinetic-word {
    font-family: var(--font-display);
    font-size: clamp(4rem, 12vw, 10rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    display: flex;
    justify-content: center;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.kinetic-moment--dark .kinetic-word {
    color: var(--mint-gold);
}

.kinetic-moment--light .kinetic-word {
    color: var(--proclamation-coral);
}

.kinetic-word .kinetic-letter {
    display: inline-block;
    opacity: 0;
    transform: scale(0);
}

.kinetic-word .kinetic-letter.animate {
    animation: bounceEnterScale 600ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* ================================================================
   ICON GALLERY STRIP
   ================================================================ */
.icon-gallery-section {
    padding-bottom: 12rem;
}

.icon-gallery-strip {
    position: relative;
    width: 120%;
    margin-left: -10%;
    overflow: hidden;
    padding: 3rem 0;
    margin-top: 3rem;
    transform: rotate(-4deg);
}

.icon-gallery-track {
    display: flex;
    gap: 2.5rem;
    width: max-content;
    animation: marqueeScroll 40s linear infinite;
}

.icon-gallery-strip:hover .icon-gallery-track {
    animation-play-state: paused;
}

.gallery-icon {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    color: var(--sovereign-teal);
    position: relative;
    cursor: pointer;
    transition: transform 300ms ease;
}

.gallery-icon:hover {
    transform: scale(1.1);
}

.gallery-icon svg {
    width: 100%;
    height: 100%;
}

/* Tooltip */
.gallery-icon .tooltip {
    position: absolute;
    bottom: -36px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--parchment-ivory);
    color: var(--deep-vault);
    font-family: var(--font-accent);
    font-size: clamp(0.7rem, 0.9vw, 0.85rem);
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 3px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms ease, transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gallery-icon:hover .tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ================================================================
   VAULT SEAL FOOTER
   ================================================================ */
.vault-footer {
    position: relative;
    background: var(--deep-vault);
    padding: 6rem 2rem 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.vault-seal {
    width: 260px;
    height: 260px;
    margin-bottom: 2rem;
}

.vault-seal-svg {
    width: 100%;
    height: 100%;
}

.vault-footer-text {
    font-family: var(--font-accent);
    font-size: clamp(0.7rem, 0.9vw, 0.85rem);
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--fog-silver);
}

/* ================================================================
   MEDALLION NAVIGATION
   ================================================================ */
.medallion-nav {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
}

.medallion-button {
    width: 64px;
    height: 64px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
    display: block;
    animation: spin 20s linear infinite;
    transition: transform 400ms ease-out;
}

.medallion-button:hover {
    animation-play-state: paused;
}

.medallion-svg {
    width: 100%;
    height: 100%;
}

.medallion-nav.expanded .medallion-button {
    animation-play-state: paused;
    transform: rotate(15deg);
}

.medallion-nav.expanded .medallion-button .medallion-svg circle:first-child {
    stroke: var(--proclamation-coral);
    stroke-width: 3;
    transition: stroke 400ms ease, stroke-width 400ms ease;
}

.medallion-menu {
    position: absolute;
    width: 200px;
    height: 200px;
    bottom: -68px;
    right: -68px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 300ms ease;
}

.medallion-nav.expanded .medallion-menu {
    pointer-events: auto;
    opacity: 1;
}

.medallion-item {
    position: absolute;
    font-family: var(--font-accent);
    font-size: clamp(0.7rem, 0.9vw, 0.85rem);
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--vellum-white);
    text-decoration: none;
    background: var(--anthracite-slate);
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid var(--mint-gold);
    opacity: 0;
    transform: translate(0, 0);
    transition: opacity 300ms ease, transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1), background 200ms ease;
    white-space: nowrap;
}

.medallion-item:hover {
    background: var(--sovereign-teal);
    color: var(--vellum-white);
}

/* Compass positions (relative to center of menu area) */
.medallion-item--north {
    top: 0;
    left: 50%;
    transform: translate(-50%, 40px);
}
.medallion-item--east {
    top: 50%;
    right: 0;
    transform: translate(-40px, -50%);
}
.medallion-item--south {
    bottom: 0;
    left: 50%;
    transform: translate(-50%, -40px);
}
.medallion-item--west {
    top: 50%;
    left: 0;
    transform: translate(40px, -50%);
}

.medallion-nav.expanded .medallion-item--north {
    opacity: 1;
    transform: translate(-50%, 0);
    transition-delay: 0ms;
}
.medallion-nav.expanded .medallion-item--east {
    opacity: 1;
    transform: translate(0, -50%);
    transition-delay: 100ms;
}
.medallion-nav.expanded .medallion-item--south {
    opacity: 1;
    transform: translate(-50%, 0);
    transition-delay: 200ms;
}
.medallion-nav.expanded .medallion-item--west {
    opacity: 1;
    transform: translate(0, -50%);
    transition-delay: 300ms;
}

/* ================================================================
   PREFERS-REDUCED-MOTION
   ================================================================ */
@media (prefers-reduced-motion: reduce) {
    .hero-title .letter,
    .hero-title .letter.animate {
        animation: fadeIn 300ms ease forwards;
        transform: none;
    }
    .hero-subtitle.animate {
        animation: fadeIn 300ms ease forwards;
        font-variation-settings: 'wdth' 125;
    }
    .diagonal-draw {
        animation: drawLine 100ms linear forwards;
    }
    .plate-inner.visible {
        animation: fadeIn 300ms ease forwards;
        transform: none;
    }
    .plate-icon.icon-visible {
        animation: fadeIn 300ms ease forwards;
        transform: none;
    }
    .kinetic-word .kinetic-letter.animate {
        animation: fadeIn 300ms ease forwards;
        transform: none;
    }
    .icon-gallery-track {
        animation: none;
    }
    .medallion-button {
        animation: none;
    }
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
    .diagonal-plate {
        padding: 6rem 1.5rem 8rem;
    }

    .kinetic-moment {
        min-height: 40vh;
    }

    .icon-gallery-strip {
        transform: rotate(0deg);
    }

    .watermark-emblem {
        width: 250px;
        height: 250px;
    }

    .medallion-nav {
        bottom: 1rem;
        right: 1rem;
    }

    .vault-seal {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 480px) {
    .diagonal-plate {
        padding: 5rem 1rem 6rem;
    }

    .hero-title {
        gap: 0;
    }

    .medallion-button {
        width: 52px;
        height: 52px;
    }

    .icon-gallery-strip {
        width: 110%;
        margin-left: -5%;
    }
}