:root {
    --bg-rice-paper: #f7f3ec;
    --text-sumi: #4a4238;
    --accent-gold: #d4a853;
    --secondary-hinoki: #c9b99a;
    --tertiary-mist: #8e9aaf;
    --highlight-lantern: #e8c4a0;
    --deep-urushi: #2d2a26;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-rice-paper);
    color: var(--text-sumi);
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.85;
    overflow-x: hidden;
}

/* ============================================
   OPENING SECTION
   ============================================ */

.opening {
    height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 8vw;
}

.opening-left {
    flex: 2;
}

.opening-right {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.kanji-title {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: clamp(3rem, 8vw, 6rem);
    letter-spacing: 0.2em;
    color: var(--text-sumi);
    opacity: 0;
    transform: translateX(-20px);
    animation: fade-slide-right 1200ms cubic-bezier(0.16, 1, 0.3, 1) 200ms forwards;
}

.roman-title {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    letter-spacing: 0.08em;
    color: var(--text-sumi);
    font-feature-settings: 'liga' 1, 'kern' 1;
    opacity: 0;
    transform: translateX(-20px);
    animation: fade-slide-right 1200ms cubic-bezier(0.16, 1, 0.3, 1) 600ms forwards;
}

.tagline {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(0.85rem, 1.5vw, 1.1rem);
    color: var(--tertiary-mist);
    margin-top: 2rem;
    opacity: 0;
    animation: fade-in-simple 1000ms ease 1400ms forwards;
}

/* Candle Flame */
.candle-flame-main {
    position: relative;
    opacity: 0;
    animation: fade-in-simple 800ms ease 1000ms forwards;
}

.flame {
    width: 16px;
    height: 32px;
    background: linear-gradient(to top, var(--accent-gold), #f5e6c8);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    box-shadow:
        0 0 20px 8px rgba(212, 168, 83, 0.4),
        0 0 60px 20px rgba(212, 168, 83, 0.15);
    animation: flame-sway 4s ease-in-out infinite;
}

.flame-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212, 168, 83, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

@keyframes fade-slide-right {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fade-in-simple {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes flame-sway {
    0%, 100% { transform: scaleX(0.95) rotate(-1deg); opacity: 0.85; }
    50% { transform: scaleX(1.05) rotate(1deg); opacity: 1; }
    75% { opacity: 0.9; }
}

/* ============================================
   CARDS SECTION
   ============================================ */

.cards-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 8vw;
}

.cards-row {
    display: flex;
    gap: 60px;
    justify-content: center;
    perspective: 1000px;
}

.card-wrapper {
    transform: translateY(var(--offset, 0px));
}

.card {
    width: 220px;
    aspect-ratio: 3 / 4;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 800ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
}

.card:hover,
.card.flipped {
    transform: rotateY(180deg);
}

.card-front,
.card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.card-front {
    background: var(--bg-rice-paper);
    border: 1px solid var(--secondary-hinoki);
}

.card-kanji {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: clamp(3rem, 8vw, 4.5rem);
    letter-spacing: 0.2em;
    color: var(--text-sumi);
}

.card-year {
    position: absolute;
    bottom: 16px;
    right: 16px;
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: 0.9rem;
    color: var(--tertiary-mist);
}

.card-back {
    background: var(--deep-urushi);
    transform: rotateY(180deg);
    padding: 8px;
}

.card-back-border {
    border: 1px solid var(--accent-gold);
    padding: 20px;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
}

.card-back p {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(0.75rem, 1.2vw, 0.9rem);
    line-height: 1.7;
    color: var(--bg-rice-paper);
}

/* ============================================
   DIVIDER
   ============================================ */

.divider {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 0;
}

.divider-line {
    width: 80px;
    height: 1px;
    background: var(--secondary-hinoki);
}

.divider-circle {
    position: absolute;
    width: 6px;
    height: 6px;
    border: 1px solid var(--secondary-hinoki);
    border-radius: 50%;
    background: var(--bg-rice-paper);
}

/* ============================================
   VERTICAL DESCENT
   ============================================ */

.vertical-descent {
    min-height: 200vh;
    padding: 120px 8vw;
}

.descent-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 40px;
    min-height: 180vh;
}

.descent-left {
    padding-right: 40px;
}

.descent-text {
    font-family: 'Libre Baskerville', serif;
    color: var(--text-sumi);
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 800ms ease, transform 800ms ease;
}

.descent-text.visible {
    opacity: 1;
    transform: translateY(0);
}

.descent-right {
    position: relative;
    overflow: hidden;
}

/* Floating candle flames in right column */
.floating-candle {
    position: absolute;
    left: var(--left, 50%);
    width: var(--size, 12px);
    height: calc(var(--size, 12px) * 2);
    background: linear-gradient(to top, var(--accent-gold), #f5e6c8);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    box-shadow:
        0 0 12px 4px rgba(212, 168, 83, 0.3),
        0 0 40px 12px rgba(212, 168, 83, 0.1);
    animation:
        float-up 25s linear infinite,
        flame-sway 4s ease-in-out infinite;
    animation-delay: var(--delay, 0s);
    opacity: 0;
}

/* Floating toro lanterns */
.floating-toro {
    position: absolute;
    left: var(--toro-left, 50%);
    width: 20px;
    height: 28px;
    border: 1px solid var(--secondary-hinoki);
    animation: float-up 30s linear infinite, fade-drift 30s linear infinite;
    animation-delay: var(--toro-delay, 0s);
    opacity: 0;
}

.floating-toro::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-gold);
}

@keyframes float-up {
    0% { transform: translateY(100vh); opacity: 0; }
    5% { opacity: 0.6; }
    90% { opacity: 0.6; }
    100% { transform: translateY(-50px); opacity: 0; }
}

@keyframes fade-drift {
    0% { opacity: 0; }
    5% { opacity: 0.5; }
    85% { opacity: 0.3; }
    100% { opacity: 0; }
}

/* ============================================
   CLOSING SECTION
   ============================================ */

.closing {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 8vw;
}

.closing-glow {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, #e8c4a0 0%, rgba(247, 243, 236, 0) 70%);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: glow-pulse 6s ease-in-out infinite;
    padding: 40px;
}

.closing-poem {
    font-family: 'Libre Baskerville', serif;
    font-size: clamp(0.8rem, 1.3vw, 1rem);
    text-align: center;
    line-height: 2;
    color: var(--text-sumi);
}

@keyframes glow-pulse {
    0%, 100% { transform: scale(0.95); }
    50% { transform: scale(1.05); }
}

.closing-line {
    width: 80px;
    height: 1px;
    border: none;
    background: var(--secondary-hinoki);
    margin: 60px 0 30px;
}

.site-footer {
    text-align: center;
}

.footer-domain {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--tertiary-mist);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .opening {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

    .opening-right {
        margin-top: 3rem;
    }

    .cards-row {
        flex-direction: column;
        align-items: center;
        gap: 40px;
    }

    .card-wrapper {
        transform: translateY(0) !important;
    }

    .descent-grid {
        grid-template-columns: 1fr;
    }

    .descent-right {
        min-height: 300px;
    }
}