/* =====================================================================
   iisugi.com v2  —  ethereal / pastoral-romantic / city-haze
   Hero-dominant. Blur-focus. Glitch-art (gentle). Creamy-pastel palette.
   ===================================================================== */

:root {
    /* Palette (creamy-pastel ethereal) */
    --cream-haze:        #FBEFE2;
    --mauve-mist:        #F0E2EA;
    --lilac-veil:        #E6DEEE;
    --skyline-lavender:  #D8C4D6;
    --window-amber:      #FFE9C7;
    --plum-ink:          #4A4456;
    --dusty-rose:        #E8B4BC;
    --soft-sage:         #B8CFB0;
    --glitch-cyan:       #B4D4E8;
    --pure-white:        #FFFFFF;  /* used at low opacity for haze and frosted glass */

    /* Type */
    --font-display: "Jost", "Inter", system-ui, sans-serif;
    --font-jp:      "Noto Sans JP", "Jost", system-ui, sans-serif;
    --font-body:    "Jost", "Inter", system-ui, sans-serif;

    /* Layout */
    --hero-min: 110vh;
    --max-content: 1280px;

    /* Motion */
    --ease-soft: cubic-bezier(.4, .0, .2, 1);
    --ease-rise: cubic-bezier(.16, 1, .3, 1);
}

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

html, body {
    background: var(--cream-haze);
    color: var(--plum-ink);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.85;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.page { position: relative; }

/* =====================================================================
   HERO
   ===================================================================== */

.hero {
    position: relative;
    width: 100%;
    min-height: var(--hero-min);
    overflow: hidden;
    isolation: isolate;
}

/* Sky gradient backdrop --------------------------------------------- */
.sky {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        var(--cream-haze) 0%,
        var(--mauve-mist) 45%,
        var(--lilac-veil) 75%,
        var(--lilac-veil) 100%
    );
    z-index: 0;
    opacity: 0;
    animation: skyIn 1400ms var(--ease-soft) 100ms forwards;
}

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

/* Drifting haze particles ------------------------------------------- */
.haze {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    animation: hazeIn 1600ms var(--ease-soft) 1100ms forwards;
}

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

.haze__dot {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0) 70%);
    filter: blur(1px);
    will-change: transform;
}

/* Skyline silhouettes (three-deep parallax) ------------------------- */
.skyline {
    position: absolute;
    left: -5%;
    width: 110%;
    bottom: 0;
    pointer-events: none;
    will-change: transform;
}

.skyline--far {
    height: 16vh;
    bottom: 28vh;
    z-index: 2;
    opacity: 0;
    filter: blur(2px);
    animation: skylineDraw 1100ms var(--ease-rise) 700ms forwards;
}

.skyline--mid {
    height: 22vh;
    bottom: 12vh;
    z-index: 3;
    opacity: 0;
    filter: blur(1px);
    animation: skylineDraw 1100ms var(--ease-rise) 900ms forwards;
}

.skyline--near {
    height: 28vh;
    bottom: 0;
    z-index: 4;
    opacity: 0;
    filter: blur(0.5px);
    animation: skylineDraw 1100ms var(--ease-rise) 1100ms forwards;
}

@keyframes skylineDraw {
    from { opacity: 0; clip-path: inset(0 100% 0 0); }
    to   { opacity: 1; clip-path: inset(0 0 0 0); }
}

/* Glitch ribbons (overstatement words) ------------------------------ */
.ribbons {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    overflow: hidden;
    opacity: 0;
    animation: ribbonsIn 1200ms var(--ease-soft) 1500ms forwards;
}

@keyframes ribbonsIn { to { opacity: 0.55; } }

.ribbon {
    position: absolute;
    left: 0;
    width: 200%;
    white-space: nowrap;
    font-family: var(--font-display);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: clamp(48px, 6vw, 84px);
    color: var(--dusty-rose);
    will-change: transform;
    pointer-events: auto;
    user-select: none;
}

.ribbon--1 {
    top: 8vh;
    animation: ribbonScroll 60s linear infinite;
}

.ribbon--2 {
    top: 22vh;
    animation: ribbonScroll 90s linear infinite reverse;
}

.ribbon--3 {
    top: 38vh;
    animation: ribbonScroll 120s linear infinite;
    color: var(--skyline-lavender);
}

@keyframes ribbonScroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

.ribbon__word {
    display: inline-block;
    margin: 0 0.45em;
    position: relative;
    transition: transform 240ms var(--ease-soft);
}

/* gentle glitch on ribbon word hover */
.ribbon__word::before,
.ribbon__word::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    pointer-events: none;
    transition: transform 240ms var(--ease-soft), opacity 240ms;
    opacity: 0;
}

.ribbon__word::before { color: var(--dusty-rose); }
.ribbon__word::after  { color: var(--glitch-cyan); }

.ribbon__word:hover::before {
    opacity: 0.85;
    transform: translate(-4px, -1px);
}

.ribbon__word:hover::after {
    opacity: 0.85;
    transform: translate(4px, 1px);
}

.ribbon__word:hover {
    transform: scale(1.06);
}

/* Hero content (centered) ------------------------------------------ */
.hero__content {
    position: relative;
    z-index: 5;
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 14vh 6vw 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

/* Brand block ------------------------------------------------------- */
.brand {
    margin-bottom: 6vh;
    line-height: 1;
}

.brand__mark {
    display: block;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(48px, 9vw, 132px);
    letter-spacing: 0.4em;
    text-transform: lowercase;
    color: var(--plum-ink);
    margin-left: 0.4em; /* compensate optical centering for letter-spacing */
    opacity: 0;
    animation: brandIn 1200ms var(--ease-rise) 1700ms forwards;
}

.brand__kanji {
    display: block;
    margin-top: 0.35em;
    font-family: var(--font-jp);
    font-weight: 400;
    font-size: clamp(40px, 7vw, 96px);
    letter-spacing: 0.05em;
    color: var(--plum-ink);
    filter: blur(2px);
    opacity: 0;
    transition: filter 380ms var(--ease-soft);
    animation: brandIn 900ms var(--ease-rise) 2400ms forwards;
}

.brand__kanji.is-focused { filter: blur(0); }

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

/* Input tile (frosted glass) ---------------------------------------- */
.input-wrap {
    width: min(720px, 92vw);
    opacity: 0;
    transform: scale(0.94);
    animation: tileIn 800ms var(--ease-rise) 2700ms forwards;
}

@keyframes tileIn {
    to { opacity: 1; transform: scale(1); }
}

.input-tile {
    position: relative;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 20px;
    padding: 28px 32px 36px;
    box-shadow:
        0 30px 60px -30px rgba(74, 68, 86, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.55) inset;
    text-align: left;
    min-height: 160px;
}

.input-prompt {
    position: absolute;
    top: 36px;
    left: 36px;
    right: 36px;
    font-family: var(--font-display);
    font-weight: 300;
    font-style: italic;
    font-size: clamp(18px, 1.5vw, 24px);
    color: rgba(74, 68, 86, 0.55);
    pointer-events: none;
    transition: opacity 280ms var(--ease-soft);
}

.input-prompt.is-hidden { opacity: 0; }

.input-area {
    position: relative;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(20px, 1.6vw, 26px);
    line-height: 1.6;
    color: var(--plum-ink);
    outline: none;
    min-height: 120px;
    caret-color: var(--dusty-rose);
}

.input-area:empty + .input-readout { display: none; }

.input-readout {
    position: absolute;
    inset: 28px 32px 36px;
    pointer-events: none;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(20px, 1.6vw, 26px);
    line-height: 1.6;
    color: transparent;
}

.input-readout .flagged {
    position: relative;
    color: var(--plum-ink);
    background: rgba(232, 180, 188, 0.0);
    border-radius: 4px;
    pointer-events: auto;
    cursor: help;
    transition: filter 280ms var(--ease-soft);
    box-shadow: 0 0 18px 4px rgba(232, 180, 188, 0.45);
    animation: haloPulse 2400ms ease-in-out infinite;
}

@keyframes haloPulse {
    0%, 100% { box-shadow: 0 0 18px 4px rgba(232, 180, 188, 0.42); }
    50%      { box-shadow: 0 0 26px 6px rgba(232, 180, 188, 0.58); }
}

.input-readout .flagged::before,
.input-readout .flagged::after {
    content: attr(data-word);
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.input-readout .flagged::before { color: var(--dusty-rose); transform: translate(1px, 0); opacity: 0.5; }
.input-readout .flagged::after  { color: var(--glitch-cyan); transform: translate(-1px, 0); opacity: 0.5; }

/* Tone meter -------------------------------------------------------- */
.tone-meter {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: rgba(74, 68, 86, 0.62);
}

.tone-meter__label--measured  { color: var(--soft-sage); }
.tone-meter__label--overstated { color: var(--dusty-rose); }

.tone-meter__track {
    flex: 1;
    height: 3px;
    background: rgba(74, 68, 86, 0.12);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.tone-meter__fill {
    position: absolute;
    inset: 0;
    width: 0%;
    background: linear-gradient(90deg, var(--soft-sage), var(--dusty-rose));
    transition: width 400ms var(--ease-soft);
}

/* Hero hint --------------------------------------------------------- */
.hero__hint {
    margin-top: 8vh;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 12px;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    color: rgba(74, 68, 86, 0.45);
    opacity: 0;
    animation: brandIn 1000ms var(--ease-soft) 3300ms forwards;
}

/* =====================================================================
   BLUR-FOCUS PATTERN (cursor on input intensifies peripheral blur)
   ===================================================================== */

.page.is-focused .skyline--far  { filter: blur(3.5px); }
.page.is-focused .skyline--mid  { filter: blur(2.5px); }
.page.is-focused .skyline--near { filter: blur(2px); }
.page.is-focused .ribbons       { filter: blur(2.5px); opacity: 0.35; }
.page.is-focused .haze          { filter: blur(1.5px); }

.skyline, .ribbons, .haze {
    transition: filter 520ms var(--ease-soft), opacity 520ms var(--ease-soft);
}

/* =====================================================================
   CALIBRATION BAND (before/after wave-arranged cards)
   ===================================================================== */

.calibration {
    position: relative;
    padding: 14vh 6vw 12vh;
    background: linear-gradient(to bottom, var(--lilac-veil), var(--mauve-mist) 60%, var(--cream-haze));
    z-index: 6;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(28px, 4vw, 56px);
    letter-spacing: 0.06em;
    text-align: center;
    color: var(--plum-ink);
    margin-bottom: 8vh;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    max-width: var(--max-content);
    margin: 0 auto;
}

.card {
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 18px;
    padding: 38px 32px;
    box-shadow:
        0 24px 50px -28px rgba(74, 68, 86, 0.22),
        0 0 0 1px rgba(255, 255, 255, 0.55) inset;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 700ms var(--ease-soft), transform 700ms var(--ease-rise);
}

.card.is-revealed { opacity: 1; transform: translateY(0); }
.card--up.is-revealed   { transform: translateY(-12px) rotate(-0.6deg); }
.card--down.is-revealed { transform: translateY(0) rotate(0.6deg); }

.card__before {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(18px, 1.4vw, 22px);
    line-height: 1.7;
    color: var(--plum-ink);
}

.card__before .ghost { color: rgba(74, 68, 86, 0.55); }

.card__after {
    margin-top: 18px;
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(20px, 1.6vw, 26px);
    line-height: 1.6;
    color: var(--plum-ink);
    opacity: 0;
    transition: opacity 700ms var(--ease-soft) 500ms;
}

.card.is-revealed .card__after { opacity: 1; }

.card__divider {
    height: 1px;
    margin: 18px 0 0;
    background: linear-gradient(90deg, transparent, var(--soft-sage), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 800ms var(--ease-soft) 350ms;
}

.card.is-revealed .card__divider { transform: scaleX(1); }

/* Glitch-art chromatic aberration on overstatement words */
.glitch {
    position: relative;
    display: inline-block;
    color: var(--plum-ink);
    transition: filter 240ms var(--ease-soft);
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    pointer-events: none;
    transition: transform 280ms var(--ease-soft), opacity 280ms;
}

.glitch::before { color: var(--dusty-rose);  transform: translate(1.5px, 0); opacity: 0.7; }
.glitch::after  { color: var(--glitch-cyan); transform: translate(-1.5px, 0); opacity: 0.7; }

.glitch:hover::before { transform: translate(4px, -1px); opacity: 0.95; }
.glitch:hover::after  { transform: translate(-4px, 1px); opacity: 0.95; }

.card.is-revealed .glitch::before,
.card.is-revealed .glitch::after {
    /* simply seeing the alternative softens the original */
    opacity: 0.35;
    transition: opacity 700ms var(--ease-soft) 700ms;
}

/* =====================================================================
   PHILOSOPHY
   ===================================================================== */

.philosophy {
    padding: 12vh 6vw 14vh;
    background: var(--cream-haze);
    text-align: center;
    z-index: 6;
    position: relative;
}

.philosophy__lede {
    max-width: 640px;
    margin: 0 auto 24px;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(18px, 1.5vw, 24px);
    line-height: 2.0;
    color: var(--plum-ink);
}

.philosophy__lede em {
    font-style: italic;
    color: var(--dusty-rose);
}

.philosophy__sign {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 13px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: rgba(74, 68, 86, 0.55);
}

/* =====================================================================
   FOOTER
   ===================================================================== */

.footer {
    position: relative;
    padding: 18vh 6vw 8vh;
    background: linear-gradient(to bottom, var(--cream-haze), var(--mauve-mist) 70%, var(--lilac-veil));
    overflow: hidden;
    text-align: center;
}

.footer__skyline {
    position: absolute;
    left: -5%;
    right: -5%;
    bottom: 6vh;
    height: 18vh;
    pointer-events: none;
    opacity: 0.85;
    filter: blur(1px);
}

.footer__line {
    position: relative;
    margin-top: 4vh;
    font-family: var(--font-jp);
    font-weight: 200;
    font-size: 13px;
    letter-spacing: 0.25em;
    color: rgba(74, 68, 86, 0.7);
    z-index: 2;
}

/* =====================================================================
   TOOLTIP (suggested calmer alternative on flagged-word hover)
   ===================================================================== */

.tooltip {
    position: fixed;
    pointer-events: none;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--plum-ink);
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 13px;
    letter-spacing: 0.04em;
    line-height: 1.5;
    padding: 10px 14px;
    border-radius: 10px;
    box-shadow:
        0 18px 40px -20px rgba(74, 68, 86, 0.4),
        0 0 0 1px rgba(232, 180, 188, 0.45) inset;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 240ms var(--ease-soft), transform 240ms var(--ease-soft);
    z-index: 100;
    max-width: 260px;
    text-align: left;
}

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

.tooltip strong {
    display: block;
    font-weight: 400;
    color: var(--dusty-rose);
    margin-bottom: 2px;
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

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

@media (max-width: 720px) {
    .hero { min-height: 100vh; }
    .hero__content { padding-top: 10vh; }
    .brand { margin-bottom: 4vh; }
    .ribbon--1 { top: 6vh; }
    .ribbon--2 { top: 18vh; }
    .ribbon--3 { top: 32vh; }
    .input-tile { padding: 22px 20px 26px; }
    .input-prompt { left: 24px; right: 24px; top: 30px; }
    .calibration { padding: 10vh 5vw 8vh; }
    .philosophy { padding: 10vh 6vw; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
    .ribbon { animation: none; }
}