/* === prototype.moe - Pastel Moe Design System === */

:root {
    /* Colors - Pastel Moe Palette */
    --bg-primary: #FFF9F6;        /* Cream Dreaming */
    --bg-secondary: #FFF0F5;      /* Whisper Rose */
    --text-primary: #3D2C3E;      /* Deep Plum */
    --text-secondary: #9D8BA0;    /* Soft Mauve */
    --accent-primary: #F5B3C8;    /* Blush Rose */
    --accent-secondary: #C9E5F0;  /* Sky Blue */
    --accent-tertiary: #D4E8D8;   /* Mint Dream */
    --accent-quaternary: #E8D8F0; /* Lavender Cloud */
    --gold-warmth: #E8C5A0;       /* Honey Glow */
    --shadow-warm: #E8C5C5;       /* Peachy Fade */
    --highlight: #FFFBF8;         /* Cream Bright */
    --content-bg: #FFF5F0;        /* Content Flow Background */

    /* Typography */
    --font-display: 'Quicksand', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-accent: 'Caveat', cursive;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --space-unit: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.1vw + 0.3rem, 1.25rem);
    font-weight: 400;
    line-height: 1.68;
    overflow-x: hidden;
}

::selection {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* === Noise Grain Overlay === */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.015;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* === Craft Block - Base Section === */
.craft-block {
    padding: calc(var(--space-unit) * 10) calc(var(--space-unit) * 4);
    position: relative;
}

/* === Welcome Portal === */
.welcome-portal {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-primary) 40%, var(--accent-secondary) 100%);
    position: relative;
    overflow: hidden;
}

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

.welcome-title-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--space-unit) * 1);
}

.site-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 5.5rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
    position: relative;
}

.site-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.5vw, 1.3rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: calc(var(--space-unit) * 1);
}

.caveat-label {
    font-family: var(--font-accent);
    font-size: clamp(0.9rem, 1vw, 1.2rem);
    color: var(--text-secondary);
    display: inline-block;
}

/* Welcome decorations */
.welcome-decorations {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.welcome-decorations .char-curious {
    position: absolute;
    top: 15%;
    right: 12%;
    animation: gentle-float 6s ease-in-out infinite;
}

.welcome-decorations .char-joyful {
    position: absolute;
    bottom: 25%;
    left: 10%;
    animation: gentle-float 5s ease-in-out infinite 1s;
}

/* Scroll hint */
.scroll-hint {
    position: absolute;
    bottom: calc(var(--space-unit) * 5);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--space-unit) * 1);
    opacity: 0.6;
}

.bounce-arrow {
    animation: bounce-down 2s ease-in-out infinite;
}

/* === Character Collection === */
.character-collection {
    padding: calc(var(--space-unit) * 12) calc(var(--space-unit) * 4);
    position: relative;
}

.section-label {
    display: block;
    text-align: center;
    font-size: clamp(1.2rem, 1.5vw, 1.6rem);
    margin-bottom: calc(var(--space-unit) * 6);
    color: var(--accent-primary);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: calc(var(--space-unit) * 4);
    max-width: 1100px;
    margin: 0 auto;
}

.character-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    padding: calc(var(--space-unit) * 4);
    box-shadow: 0 8px 24px rgba(232, 197, 197, 0.18);
    transition: transform 300ms ease-out, box-shadow 300ms ease-out;
    position: relative;
    cursor: default;
}

.character-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(232, 197, 197, 0.28);
}

.card-1 { transform: rotate(-0.8deg); }
.card-2 { transform: rotate(0.5deg); }
.card-3 { transform: rotate(-1.2deg); }
.card-4 { transform: rotate(1deg); }
.card-5 { transform: rotate(-0.5deg); }
.card-6 { transform: rotate(0.8deg); }

.card-1:hover { transform: rotate(-0.8deg) translateY(-6px); }
.card-2:hover { transform: rotate(0.5deg) translateY(-6px); }
.card-3:hover { transform: rotate(-1.2deg) translateY(-6px); }
.card-4:hover { transform: rotate(1deg) translateY(-6px); }
.card-5:hover { transform: rotate(-0.5deg) translateY(-6px); }
.card-6:hover { transform: rotate(0.8deg) translateY(-6px); }

.card-icon {
    margin-bottom: calc(var(--space-unit) * 2);
    display: flex;
    justify-content: center;
}

.card-title {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: calc(var(--space-unit) * 1);
    text-align: center;
}

.card-text {
    font-family: var(--font-body);
    font-size: clamp(0.9rem, 1vw, 1.05rem);
    color: var(--text-primary);
    line-height: 1.68;
    margin-bottom: calc(var(--space-unit) * 2);
    text-align: center;
}

.card-note {
    display: block;
    text-align: center;
    color: var(--accent-primary);
    font-size: clamp(0.85rem, 0.9vw, 1.1rem);
}

.floating-decorations {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
}

/* === Sparkle Elements === */
.sparkle {
    position: absolute;
    width: 16px;
    height: 16px;
    animation: twinkle 2s ease-in-out infinite;
}

.sparkle::before, .sparkle::after {
    content: '';
    position: absolute;
    background: var(--gold-warmth);
}

.sparkle::before {
    width: 3px;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.sparkle::after {
    width: 100%;
    height: 3px;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 2px;
}

.sparkle-1 { top: 20%; left: 8%; animation-delay: 0s; }
.sparkle-2 { top: 35%; right: 15%; animation-delay: 0.7s; }
.sparkle-3 { bottom: 30%; left: 20%; animation-delay: 1.3s; }
.sparkle-4 { top: 10%; left: 5%; animation-delay: 0.2s; }
.sparkle-5 { top: 50%; right: 8%; animation-delay: 0.9s; }
.sparkle-6 { bottom: 15%; left: 15%; animation-delay: 1.5s; }
.sparkle-7 { top: 20%; left: 10%; animation-delay: 0.4s; }
.sparkle-8 { top: 40%; right: 12%; animation-delay: 1.1s; }
.sparkle-9 { bottom: 30%; right: 20%; animation-delay: 0.6s; }
.sparkle-mini { width: 12px; height: 12px; position: relative; display: inline-block; }
.sparkle-mini::before, .sparkle-mini::after { background: var(--accent-primary); }

/* === Heart Elements === */
.heart {
    position: absolute;
    width: 12px;
    height: 12px;
    opacity: 0.6;
}

.heart::before, .heart::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50% 50% 0 0;
}

.heart::before {
    left: -3px;
    transform: rotate(-45deg);
    transform-origin: bottom right;
}

.heart::after {
    left: 3px;
    transform: rotate(45deg);
    transform-origin: bottom left;
}

.heart-1 { top: 25%; right: 25%; animation: twinkle 3s ease-in-out infinite 0.5s; }
.heart-2 { bottom: 35%; left: 15%; animation: twinkle 3s ease-in-out infinite 1.2s; }
.heart-3 { top: 60%; right: 10%; animation: twinkle 3s ease-in-out infinite 2s; }
.heart-4 { top: 25%; right: 5%; animation: twinkle 3s ease-in-out infinite 0.3s; }
.heart-5 { bottom: 30%; left: 8%; animation: twinkle 3s ease-in-out infinite 1.6s; }
.heart-6 { top: 15%; left: 20%; animation: twinkle 3s ease-in-out infinite 0.8s; }
.heart-7 { bottom: 25%; right: 15%; animation: twinkle 3s ease-in-out infinite 1.4s; }
.heart-8 { top: 50%; left: 5%; animation: twinkle 3s ease-in-out infinite 2.2s; }
.heart-mini {
    width: 8px;
    height: 8px;
    position: relative;
    display: inline-block;
    opacity: 0.6;
}
.heart-mini::before, .heart-mini::after {
    width: 8px;
    height: 8px;
}
.heart-mini::before { left: -2px; }
.heart-mini::after { left: 2px; }

/* === Accent Divider === */
.accent-divider {
    padding: calc(var(--space-unit) * 4) calc(var(--space-unit) * 4);
    text-align: center;
    overflow: hidden;
}

.wavy-divider {
    width: 100%;
    height: 60px;
    display: block;
    margin-bottom: calc(var(--space-unit) * 3);
}

.divider-chars {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(var(--space-unit) * 3);
}

.char-mini {
    display: inline-block;
}

/* === Content Flow Section === */
.content-flow {
    background: var(--content-bg);
    padding: calc(var(--space-unit) * 12) calc(var(--space-unit) * 4);
}

.flow-content {
    max-width: 720px;
    margin: 0 auto;
}

.flow-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: calc(var(--space-unit) * 5);
    text-align: center;
}

.flow-text-block {
    margin-bottom: calc(var(--space-unit) * 5);
}

.flow-text-block p {
    margin-bottom: calc(var(--space-unit) * 2);
    color: var(--text-primary);
}

.highlight-text {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.1em;
}

/* Callout */
.flow-callout {
    display: flex;
    align-items: flex-start;
    gap: calc(var(--space-unit) * 3);
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: calc(var(--space-unit) * 4);
    margin-bottom: calc(var(--space-unit) * 5);
    box-shadow: 0 8px 24px rgba(232, 197, 197, 0.18);
    border-left: 4px solid var(--accent-primary);
}

.flow-callout .cute-char {
    flex-shrink: 0;
}

.flow-callout blockquote {
    font-family: var(--font-body);
    font-style: italic;
    color: var(--text-primary);
    line-height: 1.7;
}

/* Moe Grid */
.moe-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: calc(var(--space-unit) * 3);
    margin-top: calc(var(--space-unit) * 5);
}

.moe-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--space-unit) * 1);
}

.moe-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-secondary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(232, 197, 197, 0.15);
    transition: transform 300ms ease-out, box-shadow 300ms ease-out;
}

.moe-icon:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(232, 197, 197, 0.25);
}

.moe-item .caveat-label {
    color: var(--accent-primary);
    font-size: clamp(0.9rem, 1vw, 1.15rem);
}

/* === Closing Reflection === */
.closing-reflection {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: calc(var(--space-unit) * 14) calc(var(--space-unit) * 4);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.closing-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--space-unit) * 2);
}

.char-farewell {
    margin-bottom: calc(var(--space-unit) * 2);
}

.closing-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.closing-text {
    font-family: var(--font-body);
    color: var(--text-secondary);
    max-width: 480px;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.7;
}

.closing-signature {
    font-size: clamp(1rem, 1.2vw, 1.3rem);
    color: var(--accent-primary);
    margin-top: calc(var(--space-unit) * 3);
}

.closing-decorations {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

/* === Scroll Reveal === */
.reveal-on-scroll {
    opacity: 0;
    transform: scale(0.95) translateY(20px);
    transition: opacity 600ms ease-out, transform 600ms ease-out;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: scale(1) translateY(0);
}

/* === Animations === */
@keyframes gentle-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes bounce-down {
    0%, 100% { transform: translateY(0); opacity: 0.6; }
    50% { transform: translateY(8px); opacity: 1; }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1.1); }
}

/* === Responsive: Tablet === */
@media (max-width: 1000px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: calc(var(--space-unit) * 3);
    }

    .welcome-decorations .char-curious {
        right: 5%;
    }

    .welcome-decorations .char-joyful {
        left: 5%;
    }

    .moe-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* === Responsive: Mobile === */
@media (max-width: 768px) {
    .craft-block {
        padding: calc(var(--space-unit) * 6) calc(var(--space-unit) * 3);
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: calc(var(--space-unit) * 3);
    }

    .card-1, .card-2, .card-3, .card-4, .card-5, .card-6 {
        transform: rotate(0deg);
    }

    .card-1:hover, .card-2:hover, .card-3:hover,
    .card-4:hover, .card-5:hover, .card-6:hover {
        transform: translateY(-4px);
    }

    .welcome-decorations .char-curious,
    .welcome-decorations .char-joyful {
        opacity: 0.4;
    }

    .moe-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .flow-callout {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .character-collection {
        padding: calc(var(--space-unit) * 8) calc(var(--space-unit) * 3);
    }

    .content-flow {
        padding: calc(var(--space-unit) * 8) calc(var(--space-unit) * 3);
    }

    .closing-reflection {
        padding: calc(var(--space-unit) * 10) calc(var(--space-unit) * 3);
    }
}