/* ppuzzl.dev - Street-style cosmic puzzle board */

:root {
    --worn-parchment: #E8E0D4;
    --smoked-ivory: #D9CFC0;
    --indigo-night: #2B2D42;
    --charcoal-ink: #3D3A35;
    --faded-graphite: #8E8B82;
    --aged-vermillion: #B85C4F;
    --tarnished-gold: #C4A94D;
    --celestial-slate: #6B7F99;
    --star-white: #F5F0E8;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Barlow', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    line-height: 1.65;
    color: var(--charcoal-ink);
    background-color: var(--worn-parchment);
    overflow-x: hidden;
}

/* Paper grain texture overlay */
#paper-grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* Shooting star */
#shooting-star-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.shooting-star {
    position: absolute;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--star-white), transparent);
    border-radius: 1px;
    opacity: 0;
    animation: shootingStar 1.2s ease-out forwards;
}

@keyframes shootingStar {
    0% {
        opacity: 0;
        transform: translateX(0) translateY(0);
    }
    10% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(300px) translateY(200px);
    }
}

/* Constellation SVG */
#constellation-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

#constellation-lines line {
    stroke: var(--celestial-slate);
    stroke-width: 0.5;
    opacity: 0.15;
}

/* Navigation star */
#nav-star {
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    z-index: 1000;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.3s ease;
}

#nav-star:hover {
    transform: scale(1.15);
}

.star-icon {
    position: relative;
    width: 28px;
    height: 28px;
    animation: rotateStar 20s linear infinite;
}

.star-icon.small {
    width: 14px;
    height: 14px;
}

.star-icon.tiny {
    width: 10px;
    height: 10px;
    animation: none;
}

.star-icon.medium {
    width: 36px;
    height: 36px;
}

.star-square {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60%;
    height: 60%;
    background-color: var(--tarnished-gold);
    transform: translate(-50%, -50%);
}

.star-square.rotated {
    transform: translate(-50%, -50%) rotate(45deg);
}

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

/* Radial navigation */
#radial-nav {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 999;
    width: 200px;
    height: 200px;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#radial-nav.hidden {
    opacity: 0;
}

#radial-nav.visible {
    opacity: 1;
    pointer-events: auto;
}

.nav-link {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-label {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--charcoal-ink);
    background: var(--smoked-ivory);
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--faded-graphite);
    border-radius: 2px;
    white-space: nowrap;
}

.nav-link:hover .nav-label {
    background: var(--star-white);
    color: var(--aged-vermillion);
}

/* Hero section */
#hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 2;
}

.hero-gradient-mesh {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 30%, var(--celestial-slate) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, var(--aged-vermillion) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 50%, var(--indigo-night) 0%, transparent 70%),
        linear-gradient(180deg, var(--indigo-night) 0%, var(--worn-parchment) 100%);
    z-index: 0;
}

#hero-constellations {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-line {
    stroke: var(--celestial-slate);
    stroke-width: 0.8;
    opacity: 0.35;
}

.hero-star {
    position: absolute;
    z-index: 2;
}

.hero-star .star-square {
    background-color: var(--star-white);
}

.hero-title {
    position: relative;
    z-index: 3;
    font-family: 'EB Garamond', serif;
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 6rem);
    color: var(--star-white);
    letter-spacing: -0.01em;
    text-shadow: 0 0 60px rgba(107, 127, 153, 0.4);
}

/* Card grid section */
#grid-section {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 4rem 4rem 4rem 6rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    perspective: 1200px;
}

/* Card base */
.card {
    position: relative;
    cursor: pointer;
    opacity: 0;
    transform: rotateY(-90deg);
}

.card.revealed {
    animation: cardReveal 500ms ease-out forwards;
}

@keyframes cardReveal {
    from {
        opacity: 0;
        transform: rotateY(-90deg);
    }
    to {
        opacity: 1;
        transform: rotateY(0deg);
    }
}

/* Card aspect ratios */
.card-3x4 {
    min-height: 320px;
}

.card-1x1 {
    min-height: 220px;
}

.card-16x9 {
    min-height: 200px;
}

/* Card spanning */
.span-col-1 { grid-column: span 1; }
.span-col-2 { grid-column: span 2; }
.span-row-1 { grid-row: span 1; }
.span-row-2 { grid-row: span 2; }

/* Card inner (3D flip container) */
.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: inherit;
    transition: transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.card:hover .card-inner {
    transform: translateZ(12px);
    box-shadow: 0 12px 40px rgba(61, 58, 53, 0.2);
}

.card.flipped .card-inner {
    transform: rotateY(180deg);
}

.card.flipped:hover .card-inner {
    transform: rotateY(180deg) translateZ(12px);
    box-shadow: 0 12px 40px rgba(61, 58, 53, 0.2);
}

/* Card faces */
.card-front,
.card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border: 1px solid var(--faded-graphite);
    border-radius: 4px;
    overflow: hidden;
}

.card-front {
    background-color: var(--smoked-ivory);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 16px rgba(61, 58, 53, 0.12);
}

.card-back {
    background-color: var(--indigo-night);
    transform: rotateY(180deg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

/* Gradient meshes for card backs */
.gradient-mesh {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.mesh-1 {
    background:
        radial-gradient(circle at 30% 40%, rgba(107, 127, 153, 0.6) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(184, 92, 79, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(196, 169, 77, 0.3) 0%, transparent 50%),
        var(--indigo-night);
}

.mesh-2 {
    background:
        radial-gradient(circle at 60% 20%, rgba(107, 127, 153, 0.5) 0%, transparent 45%),
        radial-gradient(circle at 20% 70%, rgba(196, 169, 77, 0.4) 0%, transparent 40%),
        var(--indigo-night);
}

.mesh-3 {
    background:
        radial-gradient(circle at 80% 30%, rgba(184, 92, 79, 0.5) 0%, transparent 40%),
        radial-gradient(circle at 20% 60%, rgba(107, 127, 153, 0.5) 0%, transparent 50%),
        radial-gradient(circle at 50% 90%, rgba(196, 169, 77, 0.3) 0%, transparent 45%),
        var(--indigo-night);
}

.mesh-4 {
    background:
        radial-gradient(circle at 40% 50%, rgba(107, 127, 153, 0.6) 0%, transparent 55%),
        radial-gradient(circle at 80% 20%, rgba(184, 92, 79, 0.3) 0%, transparent 35%),
        var(--indigo-night);
}

.mesh-5 {
    background:
        radial-gradient(circle at 25% 25%, rgba(196, 169, 77, 0.5) 0%, transparent 45%),
        radial-gradient(circle at 75% 75%, rgba(107, 127, 153, 0.5) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(184, 92, 79, 0.3) 0%, transparent 40%),
        var(--indigo-night);
}

.mesh-6 {
    background:
        radial-gradient(circle at 70% 30%, rgba(196, 169, 77, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 30% 80%, rgba(107, 127, 153, 0.5) 0%, transparent 50%),
        var(--indigo-night);
}

.mesh-7 {
    background:
        radial-gradient(circle at 50% 30%, rgba(184, 92, 79, 0.6) 0%, transparent 45%),
        radial-gradient(circle at 20% 70%, rgba(107, 127, 153, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(196, 169, 77, 0.3) 0%, transparent 40%),
        var(--indigo-night);
}

.mesh-8 {
    background:
        radial-gradient(circle at 40% 20%, rgba(107, 127, 153, 0.5) 0%, transparent 50%),
        radial-gradient(circle at 60% 80%, rgba(184, 92, 79, 0.4) 0%, transparent 45%),
        radial-gradient(circle at 90% 40%, rgba(196, 169, 77, 0.3) 0%, transparent 35%),
        var(--indigo-night);
}

.mesh-9 {
    background:
        radial-gradient(circle at 30% 60%, rgba(196, 169, 77, 0.5) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(107, 127, 153, 0.5) 0%, transparent 45%),
        radial-gradient(circle at 50% 90%, rgba(184, 92, 79, 0.3) 0%, transparent 40%),
        var(--indigo-night);
}

.mesh-10 {
    background:
        radial-gradient(circle at 80% 50%, rgba(107, 127, 153, 0.6) 0%, transparent 50%),
        radial-gradient(circle at 20% 30%, rgba(184, 92, 79, 0.4) 0%, transparent 40%),
        var(--indigo-night);
}

.mesh-11 {
    background:
        radial-gradient(circle at 50% 50%, rgba(196, 169, 77, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 10% 10%, rgba(107, 127, 153, 0.5) 0%, transparent 45%),
        radial-gradient(circle at 90% 90%, rgba(184, 92, 79, 0.4) 0%, transparent 40%),
        var(--indigo-night);
}

.mesh-12 {
    background:
        radial-gradient(circle at 60% 40%, rgba(184, 92, 79, 0.5) 0%, transparent 50%),
        radial-gradient(circle at 30% 80%, rgba(196, 169, 77, 0.4) 0%, transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(107, 127, 153, 0.4) 0%, transparent 40%),
        var(--indigo-night);
}

.back-text {
    position: relative;
    z-index: 1;
    font-family: 'EB Garamond', serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    color: var(--star-white);
    text-align: center;
    letter-spacing: -0.01em;
    line-height: 1.4;
}

/* Card content */
.card-category {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.category-label {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--faded-graphite);
}

.card-title {
    font-family: 'EB Garamond', serif;
    font-weight: 700;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    letter-spacing: -0.01em;
    color: var(--charcoal-ink);
    margin-bottom: 0.75rem;
    line-height: 1.15;
}

.card-text {
    font-family: 'Barlow', sans-serif;
    font-weight: 400;
    color: var(--charcoal-ink);
    flex: 1;
    margin-bottom: 1rem;
}

.card-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--faded-graphite);
    margin-top: auto;
}

/* Tape strip decorations */
.tape-strip {
    position: absolute;
    width: 48px;
    height: 12px;
    background-color: var(--tarnished-gold);
    opacity: 0.35;
    z-index: 2;
}

.tape-strip.top-right {
    top: -2px;
    right: 16px;
    transform: rotate(-8deg);
}

.tape-strip.top-left {
    top: -2px;
    left: 16px;
    transform: rotate(6deg);
}

.tape-strip.bottom-right {
    bottom: -2px;
    right: 16px;
    transform: rotate(5deg);
}

.tape-strip.bottom-left {
    bottom: -2px;
    left: 16px;
    transform: rotate(-7deg);
}

/* Break cards */
.break-card {
    grid-column: 1 / -1;
    padding: 3rem 2rem;
    text-align: center;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.break-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.break-text {
    font-family: 'EB Garamond', serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--celestial-slate);
    letter-spacing: -0.01em;
}

/* Footer */
#footer-section {
    position: relative;
    z-index: 2;
    padding: 6rem 2rem;
    text-align: center;
    background:
        radial-gradient(ellipse at 50% 100%, var(--celestial-slate) 0%, transparent 60%),
        linear-gradient(0deg, var(--indigo-night) 0%, var(--worn-parchment) 100%);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-content .star-icon {
    animation: rotateStar 20s linear infinite;
}

.footer-content .star-square {
    background-color: var(--star-white);
}

.footer-text {
    font-family: 'EB Garamond', serif;
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--star-white);
    letter-spacing: -0.01em;
}

.footer-sub {
    font-family: 'Barlow', sans-serif;
    font-weight: 400;
    font-size: 0.95rem;
    color: var(--faded-graphite);
}

/* Responsive */
@media (max-width: 1024px) {
    #grid-section {
        padding: 3rem 2rem;
    }

    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .span-col-2 {
        grid-column: span 2;
    }
}

@media (max-width: 600px) {
    #grid-section {
        padding: 2rem 1rem;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .span-col-2 {
        grid-column: span 1;
    }

    .span-row-2 {
        grid-row: span 1;
    }

    .card-3x4 {
        min-height: 260px;
    }

    .card-16x9 {
        min-height: 180px;
    }

    .hero-title {
        font-size: clamp(2rem, 10vw, 3.5rem);
    }

    #radial-nav {
        width: 160px;
        height: 160px;
    }
}