/* ============================================
   mujun.cafe — Neubrutalist Contradiction Café
   ============================================ */

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

:root {
    --midnight-deep: #0a0e1a;
    --midnight: #1a2040;
    --navy: #2c3152;
    --slate: #6b7394;
    --parchment-dark: #c4bfb3;
    --parchment: #e0d8c8;
    --parchment-mid: #e8e2d6;
    --parchment-light: #f2ece0;
    --parchment-lightest: #faf8f4;
    --spear-red: #e63946;
    --shield-gold: #d4a24e;
}

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

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    background-color: var(--midnight);
    color: var(--parchment);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* --- Threshold Bar (Fixed Header) --- */
.threshold-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 48px;
    background: var(--midnight-deep);
    border-bottom: 3px solid var(--midnight-deep);
    box-shadow: 0 3px 0 var(--navy);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.threshold-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--parchment);
}

.threshold-kanji {
    font-size: 1.2rem;
    color: var(--shield-gold);
    letter-spacing: 0.1em;
}

/* --- Masonry Field --- */
.masonry-field {
    padding: 72px 24px 48px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* --- Mujun Cards --- */
.mujun-card {
    perspective: 1000px;
    min-height: 320px;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 320px;
    transform-style: preserve-3d;
    transition: transform 0.7s cubic-bezier(0.68, -0.35, 0.265, 1.35);
}

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

.card-face {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border: 3px solid var(--midnight-deep);
    box-shadow: 6px 6px 0px var(--midnight-deep);
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.mujun-card:hover .card-face--front {
    box-shadow: 8px 8px 0px var(--midnight-deep);
    transform: translate(-2px, -2px);
}

.card-face--front {
    background: var(--navy);
}

.card-face--back {
    background: var(--midnight-deep);
    transform: rotateY(180deg);
    justify-content: center;
    align-items: center;
    text-align: center;
}

.card-face--back p {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--parchment-mid);
    max-width: 280px;
}

.back-kanji {
    display: block;
    font-size: 3rem;
    margin-top: 20px;
    opacity: 0.15;
    color: var(--parchment-light);
}

/* Spear cards */
.mujun-card--spear .card-face--front {
    border-top: 6px solid var(--spear-red);
}

.mujun-card--spear .card-face--back {
    border-top: 6px solid var(--spear-red);
}

/* Shield cards */
.mujun-card--shield .card-face--front {
    border-top: 6px solid var(--shield-gold);
}

.mujun-card--shield .card-face--back {
    border-top: 6px solid var(--shield-gold);
}

/* Card content */
.iso-icon {
    margin-bottom: 16px;
}

.mujun-card h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    letter-spacing: -0.02em;
    color: var(--parchment-light);
    margin-bottom: 12px;
    line-height: 1.15;
}

.mujun-card p {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--parchment-dark);
}

/* --- Mon Patterns (5% opacity backgrounds) --- */
.mon-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.05;
    pointer-events: none;
}

.mon-pattern--1 {
    background-image: radial-gradient(circle, var(--parchment) 1px, transparent 1px);
    background-size: 20px 20px;
}

.mon-pattern--2 {
    background-image: repeating-conic-gradient(var(--parchment) 0% 25%, transparent 0% 50%);
    background-size: 24px 24px;
}

.mon-pattern--3 {
    background-image:
        radial-gradient(circle at 50% 50%, var(--parchment) 2px, transparent 2px),
        radial-gradient(circle at 0% 0%, var(--parchment) 1px, transparent 1px);
    background-size: 30px 30px, 15px 15px;
}

.mon-pattern--4 {
    background-image:
        linear-gradient(45deg, var(--parchment) 1px, transparent 1px),
        linear-gradient(-45deg, var(--parchment) 1px, transparent 1px);
    background-size: 18px 18px;
}

.mon-pattern--5 {
    background-image: radial-gradient(circle, var(--parchment) 3px, transparent 3px);
    background-size: 32px 32px;
}

.mon-pattern--6 {
    background-image:
        linear-gradient(0deg, var(--parchment) 1px, transparent 1px),
        linear-gradient(90deg, var(--parchment) 1px, transparent 1px);
    background-size: 22px 22px;
}

/* --- Floating Fragments --- */
.floating-fragments {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.fragment {
    position: absolute;
    width: 12px;
    height: 12px;
    opacity: 0.4;
    animation: fragmentFloat 10s ease-in-out infinite alternate;
}

.fragment--cube {
    background: var(--slate);
    transform: rotate(45deg);
}

.fragment--triangle {
    width: 0;
    height: 0;
    background: none;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 12px solid var(--slate);
}

.fragment--cylinder {
    border-radius: 50%;
    background: var(--slate);
}

@keyframes fragmentFloat {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-20px) rotate(15deg); }
}

.fragment--triangle {
    animation-name: fragmentFloatTriangle;
}

@keyframes fragmentFloatTriangle {
    0% { transform: translateY(0); }
    100% { transform: translateY(-25px); }
}

/* --- Connector SVG --- */
.connector-svg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.connector-svg line {
    stroke: var(--slate);
    stroke-width: 1;
    stroke-dasharray: 4 8;
}

/* --- Footer --- */
.site-footer {
    background: var(--midnight-deep);
    text-align: center;
    padding: 32px 24px;
    border-top: 3px solid var(--midnight-deep);
}

.site-footer p {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--parchment-lightest);
    letter-spacing: 0.02em;
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .masonry-field {
        grid-template-columns: 1fr;
        padding: 64px 16px 32px;
        gap: 20px;
    }

    .card-inner {
        min-height: 280px;
    }

    .mujun-card {
        min-height: 280px;
    }
}