/* ===================================================================
   hwagryul.com - Molten Gold Foundry / Holographic Prism
   =================================================================== */

@property --holo-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

@property --holo-angle-secondary {
    syntax: '<angle>';
    initial-value: 180deg;
    inherits: false;
}

@property --seal-holo-hue {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

:root {
    --bg-primary: #050505;
    --bg-card: #0A0A0A;
    --bg-interstitial: #0D0B08;
    --gold: #FFD700;
    --gold-molten: #E8A317;
    --rose-gold: #B76E79;
    --prism-cyan: #00E5FF;
    --prism-violet: #9C27B0;
    --text-primary: #B8A080;
    --text-secondary: #6B5B4A;
    --text-accent: #8A7A6A;
    --text-display: #FFD700;
    --border-glow: #3D2E0A;
    --crimson: #FF1744;
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', 'Helvetica Neue', sans-serif;
    --font-accent: 'Space Grotesk', sans-serif;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ===================================================================
   Gold Dust Particles
   =================================================================== */

.gold-dust-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.gold-particle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.6) 0%, rgba(255, 215, 0, 0) 70%);
    pointer-events: none;
}

/* ===================================================================
   Hero Section - IGNITION
   =================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.holo-disc {
    position: absolute;
    width: 560px;
    height: 560px;
    border-radius: 50%;
    background: conic-gradient(from var(--holo-angle), var(--gold), var(--prism-cyan), var(--prism-violet), var(--rose-gold), var(--gold));
    filter: blur(80px);
    opacity: 0.18;
    animation: holoSpin 8s linear infinite;
    will-change: --holo-angle;
}

.holo-disc--secondary {
    width: 340px;
    height: 340px;
    background: conic-gradient(from var(--holo-angle-secondary), var(--prism-violet), var(--gold), var(--rose-gold), var(--prism-cyan), var(--prism-violet));
    filter: blur(60px);
    opacity: 0.1;
    animation: holoSpinSecondary 12s linear infinite;
    will-change: --holo-angle-secondary;
}

@keyframes holoSpin {
    from { --holo-angle: 0deg; }
    to { --holo-angle: 360deg; }
}

@keyframes holoSpinSecondary {
    from { --holo-angle-secondary: 180deg; }
    to { --holo-angle-secondary: 540deg; }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3rem, 10vw, 8rem);
    color: var(--text-display);
    letter-spacing: 0.2em;
    text-shadow: 0 0 80px rgba(255, 215, 0, 0.1);
    line-height: 1.1;
    opacity: 0;
    animation: textMaterialize 2s ease-out forwards;
}

@keyframes textMaterialize {
    0% {
        opacity: 0;
        letter-spacing: 0.2em;
        text-shadow: 0 0 80px rgba(255, 215, 0, 0.1);
    }
    60% {
        opacity: 0.8;
    }
    100% {
        opacity: 1;
        letter-spacing: -0.02em;
        text-shadow: 0 0 40px rgba(255, 215, 0, 0.3);
    }
}

.hero-dot {
    color: var(--rose-gold);
    font-weight: 600;
}

.hero-tagline {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--text-secondary);
    margin-top: 1.5rem;
    letter-spacing: 0.06em;
    line-height: 1.7;
    opacity: 0;
    animation: fadeIn 0.8s ease-out 0.4s forwards;
}

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

/* Shake animation for hero */
@keyframes heroShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-2px); }
    20%, 40%, 60%, 80% { transform: translateX(2px); }
}

.hero-title.shake {
    animation: heroShake 0.4s ease-out;
}

/* ===================================================================
   HUD Scan Lines
   =================================================================== */

.hud-scan-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent 0%, var(--gold-molten) 30%, var(--gold) 50%, var(--gold-molten) 70%, transparent 100%);
    opacity: 0;
    animation: scanLineMove 4s linear infinite;
    animation-delay: 8s;
}

@keyframes scanLineMove {
    0% {
        transform: translateX(-100%);
        opacity: 0.4;
    }
    45% {
        transform: translateX(100%);
        opacity: 0.4;
    }
    45.01% {
        opacity: 0;
    }
    100% {
        opacity: 0;
        transform: translateX(-100%);
    }
}

/* ===================================================================
   Card Grid Section
   =================================================================== */

.card-grid-section {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* ===================================================================
   Forge Cards
   =================================================================== */

.forge-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-glow);
    padding: 2.25rem 2rem;
    position: relative;
    cursor: default;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    animation: borderHoloShift 6s linear infinite;
}

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

.forge-card:hover {
    transform: perspective(600px) rotateY(2deg) rotateX(-1deg);
    box-shadow:
        0 0 20px rgba(255, 215, 0, 0.1),
        0 0 60px rgba(255, 215, 0, 0.05);
}

.forge-card.visible:hover {
    transform: perspective(600px) rotateY(2deg) rotateX(-1deg);
}

@keyframes borderHoloShift {
    0%, 100% { border-color: var(--gold); }
    25% { border-color: var(--rose-gold); }
    50% { border-color: var(--prism-cyan); }
    75% { border-color: var(--prism-violet); }
}

/* Card Accent Bar - neon glow */
.card-accent-bar {
    height: 2px;
    background: linear-gradient(to right, var(--gold), var(--rose-gold), var(--gold));
    margin-bottom: 1.75rem;
    box-shadow:
        0 0 10px rgba(255, 215, 0, 0.4),
        0 0 40px rgba(255, 215, 0, 0.15);
    animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* HUD Corner Brackets */
.card-hud-corners {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hud-corner {
    position: absolute;
    width: 18px;
    height: 18px;
    opacity: 0.35;
}

.hud-corner--tl {
    top: -4px;
    left: -4px;
    border-top: 1px solid var(--gold);
    border-left: 1px solid var(--gold);
}

.hud-corner--tr {
    top: -4px;
    right: -4px;
    border-top: 1px solid var(--gold);
    border-right: 1px solid var(--gold);
}

.hud-corner--bl {
    bottom: -4px;
    left: -4px;
    border-bottom: 1px solid var(--gold);
    border-left: 1px solid var(--gold);
}

.hud-corner--br {
    bottom: -4px;
    right: -4px;
    border-bottom: 1px solid var(--gold);
    border-right: 1px solid var(--gold);
}

/* Card Icon with gauge arcs */
.card-icon {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
}

.card-gauge-arc {
    position: absolute;
    top: -4px;
    right: calc(50% - 48px);
    opacity: 0;
    transition: opacity 0.6s ease;
}

.forge-card.visible .card-gauge-arc {
    opacity: 1;
}

.gauge-arc {
    transition: stroke-dashoffset 1.5s ease-out;
}

.forge-card.visible .gauge-arc {
    stroke-dashoffset: 0;
}

.card-label {
    font-family: var(--font-accent);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-accent);
    display: block;
    margin-bottom: 0.75rem;
}

.card-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    color: var(--text-display);
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.card-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(0.9rem, 1.2vw, 1rem);
    line-height: 1.7;
    color: var(--text-primary);
}

/* Shake-Error Interaction */
@keyframes cardShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

.forge-card.shaking {
    animation: cardShake 0.4s ease-out;
}

/* Crimson flash on sealed card click */
.card-crimson-flash {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    pointer-events: none;
    transition: border-color 0.1s ease;
}

.forge-card.crimson-flash .card-crimson-flash {
    border-color: var(--crimson);
    animation: crimsonFade 0.6s ease-out forwards;
}

@keyframes crimsonFade {
    0% {
        border-color: var(--crimson);
        box-shadow: inset 0 0 30px rgba(255, 23, 68, 0.15);
    }
    100% {
        border-color: transparent;
        box-shadow: inset 0 0 0 rgba(255, 23, 68, 0);
    }
}

/* ===================================================================
   Interstitial Panels - DECLARATION
   =================================================================== */

.interstitial {
    position: relative;
    z-index: 1;
    padding: 7rem 2rem;
    text-align: center;
    background-color: var(--bg-interstitial);
    overflow: hidden;
}

.interstitial-particles {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(2px 2px at 10% 20%, rgba(255, 215, 0, 0.08) 50%, transparent 100%),
        radial-gradient(1.5px 1.5px at 30% 60%, rgba(255, 215, 0, 0.06) 50%, transparent 100%),
        radial-gradient(2px 2px at 55% 15%, rgba(255, 215, 0, 0.1) 50%, transparent 100%),
        radial-gradient(1px 1px at 75% 45%, rgba(255, 215, 0, 0.05) 50%, transparent 100%),
        radial-gradient(2px 2px at 90% 70%, rgba(255, 215, 0, 0.07) 50%, transparent 100%),
        radial-gradient(1.5px 1.5px at 45% 85%, rgba(255, 215, 0, 0.04) 50%, transparent 100%);
    animation: particleDrift 15s linear infinite;
    pointer-events: none;
}

@keyframes particleDrift {
    0% { transform: translateY(0) translateX(0); }
    50% { transform: translateY(-20px) translateX(5px); }
    100% { transform: translateY(0) translateX(0); }
}

.interstitial-hud-corners {
    position: absolute;
    inset: 20px;
    pointer-events: none;
}

.interstitial-hud-corners .hud-corner {
    opacity: 0.2;
}

.interstitial-hud-corners .hud-corner--tl {
    top: 0;
    left: 0;
    width: 28px;
    height: 28px;
}

.interstitial-hud-corners .hud-corner--tr {
    top: 0;
    right: 0;
    width: 28px;
    height: 28px;
}

.interstitial-hud-corners .hud-corner--bl {
    bottom: 0;
    left: 0;
    width: 28px;
    height: 28px;
}

.interstitial-hud-corners .hud-corner--br {
    bottom: 0;
    right: 0;
    width: 28px;
    height: 28px;
}

.interstitial .hud-scan-line {
    animation-delay: 4s;
}

.interstitial-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    color: var(--text-display);
    text-shadow: 0 0 60px rgba(255, 215, 0, 0.2);
    line-height: 1.4;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 2;
}

/* ===================================================================
   Forge Seal Section - THE SEAL
   =================================================================== */

.forge-seal-section {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 7rem 2rem 5rem;
    background: linear-gradient(to bottom, var(--bg-primary), #030303);
}

.seal-emblem {
    position: relative;
    width: 140px;
    height: 140px;
    margin: 0 auto 2.5rem;
    animation: sealRotate 30s linear infinite;
}

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

.seal-ring {
    position: absolute;
    border-radius: 50%;
    border-style: solid;
}

.seal-ring--outermost {
    inset: -6px;
    border-width: 1px;
    border-color: transparent;
    border-top-color: var(--gold);
    border-bottom-color: var(--gold);
    opacity: 0.2;
}

.seal-ring--outer {
    inset: 0;
    border-width: 1px;
    border-color: var(--gold);
    opacity: 0.4;
}

.seal-ring--middle {
    inset: 8px;
    border-width: 1px;
    border-color: var(--gold-molten);
    opacity: 0.3;
}

.seal-ring--inner {
    inset: 16px;
    border-width: 1px;
    border-color: var(--gold);
    opacity: 0.25;
}

.seal-ring--core {
    inset: 24px;
    border-width: 1px;
    border-color: var(--rose-gold);
    opacity: 0.2;
}

.seal-holo-border {
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    border: 1px solid;
    border-color: hsl(from var(--gold) h s l);
    animation: sealHoloHue 6s linear infinite;
    opacity: 0.25;
}

@keyframes sealHoloHue {
    0% { border-color: var(--gold); }
    25% { border-color: var(--prism-cyan); }
    50% { border-color: var(--prism-violet); }
    75% { border-color: var(--rose-gold); }
    100% { border-color: var(--gold); }
}

.seal-monogram {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 2.2rem;
    color: var(--gold);
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
    animation: sealRotateReverse 30s linear infinite;
}

@keyframes sealRotateReverse {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(-360deg); }
}

.seal-domain {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.25rem;
    color: rgba(232, 163, 23, 0.35);
    margin-bottom: 1rem;
    letter-spacing: 0.04em;
}

.seal-colophon {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 420px;
    margin: 0 auto;
    opacity: 0.7;
}

/* ===================================================================
   Fade Reveal (Scroll-triggered)
   =================================================================== */

.fade-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================================================
   Responsive
   =================================================================== */

@media (max-width: 900px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .holo-disc {
        width: 380px;
        height: 380px;
    }

    .holo-disc--secondary {
        width: 220px;
        height: 220px;
    }
}

@media (max-width: 560px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .card-grid-section {
        padding: 3rem 1.25rem;
    }

    .forge-card {
        padding: 1.75rem 1.5rem;
    }

    .interstitial {
        padding: 5rem 1.5rem;
    }

    .holo-disc {
        width: 280px;
        height: 280px;
    }

    .holo-disc--secondary {
        width: 160px;
        height: 160px;
    }

    .hero-title {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }
}

@media (prefers-reduced-motion: reduce) {
    .holo-disc,
    .holo-disc--secondary,
    .gold-particle,
    .seal-emblem,
    .seal-monogram,
    .seal-holo-border,
    .hud-scan-line,
    .interstitial-particles {
        animation: none;
    }

    .forge-card {
        animation: none;
        border-color: var(--border-glow);
    }

    .card-accent-bar {
        animation: none;
        opacity: 1;
    }

    .hero-title {
        animation: none;
        opacity: 1;
        letter-spacing: -0.02em;
        text-shadow: 0 0 40px rgba(255, 215, 0, 0.3);
    }

    .hero-tagline {
        animation: none;
        opacity: 1;
    }

    .fade-reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .forge-card {
        opacity: 1;
        transform: none;
    }
}