@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;700;900&display=swap');

:root {
    --bg: #05070f;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-hover: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.08);
    --border-bright: rgba(255, 255, 255, 0.18);

    --purple: #a855f7;
    --pink: #ec4899;
    --cyan: #06b6d4;

    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #475569;

    --glow-purple: 0 0 40px rgba(168, 85, 247, 0.25);
    --shadow-card: 0 25px 60px rgba(0, 0, 0, 0.6);

    --radius: 24px;
    --radius-sm: 14px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans JP', 'Space Grotesk', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ── Ambient orbs ── */
.orbs {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    will-change: transform;
}

.orb-1 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.35) 0%, transparent 70%);
    top: -250px;
    left: -150px;
    animation: orb-drift 22s ease-in-out infinite;
}

.orb-2 {
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.25) 0%, transparent 70%);
    top: 25%;
    right: -180px;
    animation: orb-drift 28s ease-in-out infinite reverse;
}

.orb-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
    bottom: -80px;
    left: 25%;
    animation: orb-drift 19s ease-in-out infinite 7s;
}

@keyframes orb-drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%       { transform: translate(40px, -60px) scale(1.06); }
    66%       { transform: translate(-30px, 40px) scale(0.94); }
}

/* ── Particle canvas ── */
#particleCanvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

/* ── Layout ── */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px 20px 60px;
    position: relative;
    z-index: 2;
}

/* ── Header ── */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 64px;
    padding-top: 12px;
    animation: fade-up 0.7s ease-out both;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    font-size: 3.2rem;
    line-height: 1;
    filter: drop-shadow(0 0 24px rgba(236, 72, 153, 0.6));
    animation: panda-bob 3.5s ease-in-out infinite;
    will-change: transform;
}

@keyframes panda-bob {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50%       { transform: translateY(-10px) rotate(3deg); }
}

.logo-text h1 {
    font-size: 2.4rem;
    font-weight: 900;
    line-height: 1.1;
    background: linear-gradient(135deg, #ffffff 20%, var(--purple) 60%, var(--pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-jp {
    font-weight: 400;
    opacity: 0.65;
}

.logo-tagline {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 5px;
    letter-spacing: 0.03em;
}

.header-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 10px 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    backdrop-filter: blur(12px);
    white-space: nowrap;
    flex-shrink: 0;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 10px #22c55e;
    animation: dot-pulse 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes dot-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.4; transform: scale(0.75); }
}

/* ── Glass card ── */
.glass-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(24px);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 55%);
    pointer-events: none;
    border-radius: inherit;
}

/* ── Generator ── */
.generator {
    margin-bottom: 80px;
    animation: fade-up 0.7s ease-out 0.15s both;
}

.generator-card {
    padding: 44px 40px;
    max-width: 680px;
    margin: 0 auto;
}

.card-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--purple);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.card-title {
    font-size: 1.65rem;
    font-weight: 700;
    margin-bottom: 32px;
    line-height: 1.35;
}

/* ── Image frame ── */
.image-frame {
    width: 100%;
    aspect-ratio: 1;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    position: relative;
}

.image-frame::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.45));
    pointer-events: none;
    z-index: 1;
}

.image-frame.is-loading::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(168,85,247,0.12) 50%, transparent 100%);
    animation: shimmer-sweep 1.4s ease-in-out infinite;
    z-index: 2;
}

@keyframes shimmer-sweep {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.placeholder {
    text-align: center;
    padding: 40px;
    z-index: 1;
}

.placeholder-panda {
    font-size: 5rem;
    margin-bottom: 16px;
    animation: panda-wiggle 4s ease-in-out infinite;
    display: block;
}

@keyframes panda-wiggle {
    0%, 100% { transform: rotate(-6deg); }
    50%       { transform: rotate(6deg); }
}

.placeholder p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

.generated-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    display: block;
    animation: img-zoom-in 0.55s cubic-bezier(0.34, 1.56, 0.64, 1) both;
    transition: transform 0.5s ease;
    z-index: 1;
}

.generated-image:hover { transform: scale(1.04); }

@keyframes img-zoom-in {
    from { opacity: 0; transform: scale(0.82); }
    to   { opacity: 1; transform: scale(1); }
}

/* ── Controls ── */
.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.generate-btn {
    position: relative;
    background: linear-gradient(135deg, var(--purple) 0%, var(--pink) 100%);
    color: white;
    border: none;
    padding: 17px 52px;
    font-size: 1.2rem;
    font-weight: 700;
    font-family: inherit;
    border-radius: 100px;
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    box-shadow: 0 8px 32px rgba(168, 85, 247, 0.45);
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 14px 44px rgba(168, 85, 247, 0.65);
}

.generate-btn:active:not(:disabled) { transform: translateY(-1px); }

.generate-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none;
}

.btn-shimmer {
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, transparent 35%, rgba(255,255,255,0.35) 50%, transparent 65%);
    transform: translateX(-150%);
}

.generate-btn:hover:not(:disabled) .btn-shimmer {
    animation: btn-shine 0.55s ease-out forwards;
}

@keyframes btn-shine {
    to { transform: translateX(150%); }
}

.btn-content {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1;
}

.btn-icon {
    font-size: 1.4rem;
    display: inline-block;
    transition: transform 0.3s ease;
}

.generate-btn.is-loading .btn-icon {
    animation: spin 0.75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Status ── */
.status-area {
    min-height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 100%;
}

.message {
    padding: 10px 28px;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    transition: opacity 0.3s ease;
}

.msg-hidden { display: none; }

.message.success {
    background: rgba(34, 197, 94, 0.14);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #86efac;
}

.message.error {
    background: rgba(239, 68, 68, 0.14);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.message.info {
    background: rgba(168, 85, 247, 0.14);
    border: 1px solid rgba(168, 85, 247, 0.3);
    color: #d8b4fe;
}

.timer {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

.timer-hidden { display: none; }

/* ── Gallery ── */
.gallery-section {
    animation: fade-up 0.7s ease-out 0.3s both;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--cyan);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-title {
    font-size: 1.9rem;
    font-weight: 700;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 16px;
}

.gallery-placeholder {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    background: var(--surface);
    border: 1px dashed var(--border-bright);
    border-radius: var(--radius);
}

.gallery-placeholder p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.gallery-placeholder .sub {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.gallery-item {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    animation: gallery-pop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.gallery-item:hover {
    transform: translateY(-7px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.45), var(--glow-purple);
    border-color: var(--border-bright);
}

.gallery-item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.gallery-item:hover img { transform: scale(1.06); }

.gallery-item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px 12px;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, transparent 100%);
    color: rgba(255,255,255,0.85);
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
    transform: translateY(0);
}

@keyframes gallery-pop {
    from { opacity: 0; transform: scale(0.82); }
    to   { opacity: 1; transform: scale(1); }
}

/* ── Lightbox ── */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    visibility: visible;
    opacity: 1;
}

.lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.93);
    backdrop-filter: blur(24px);
    cursor: pointer;
}

.lightbox-content {
    position: relative;
    max-width: min(88vw, 700px);
    z-index: 1;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 88vh;
    border-radius: var(--radius-sm);
    box-shadow: 0 40px 80px rgba(0,0,0,0.9), var(--glow-purple);
    display: block;
}

.lightbox-close {
    position: absolute;
    top: -18px;
    right: -18px;
    width: 42px;
    height: 42px;
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border-bright);
    border-radius: 50%;
    color: var(--text);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
    line-height: 1;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.15);
    transform: rotate(90deg);
}

.lightbox-date {
    text-align: center;
    margin-top: 14px;
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ── Footer ── */
.footer {
    text-align: center;
    margin-top: 80px;
    padding: 40px 20px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.7;
}

.footer-small {
    margin-top: 6px;
    opacity: 0.45;
    font-size: 0.75rem;
}

/* ── Confetti ── */
.confetti-piece {
    position: fixed;
    pointer-events: none;
    z-index: 999;
    border-radius: 2px;
    animation: confetti-fall linear forwards;
}

@keyframes confetti-fall {
    0%   { transform: translateY(-20px) rotate(0deg); opacity: 1; }
    100% { transform: translateY(105vh) rotate(900deg); opacity: 0; }
}

/* ── Shared keyframes ── */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ── */
@media (max-width: 680px) {
    .header {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        margin-bottom: 44px;
    }

    .logo { flex-direction: column; gap: 10px; }

    .logo-text h1 { font-size: 1.8rem; }

    .logo-icon { font-size: 2.8rem; }

    .generator-card { padding: 28px 20px; }

    .card-title { font-size: 1.25rem; }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .section-title { font-size: 1.45rem; }
}

@media (max-width: 380px) {
    .gallery-grid { gap: 8px; }
}