/* M3 Expressive Design Tokens - Vibrant Edition */
:root {
    /* Primary - Electric Violet */
    --md-primary: #7C3AED;
    --md-on-primary: #FFFFFF;
    --md-primary-container: #EDE9FE;
    --md-on-primary-container: #4C1D95;

    /* Secondary - Ocean Teal */
    --md-secondary: #0D9488;
    --md-on-secondary: #FFFFFF;
    --md-secondary-container: #CCFBF1;
    --md-on-secondary-container: #134E4A;

    /* Tertiary - Sunset Rose */
    --md-tertiary: #EC4899;
    --md-on-tertiary: #FFFFFF;
    --md-tertiary-container: #FCE7F3;
    --md-on-tertiary-container: #9D174D;

    /* Surface */
    --md-surface: #FAFAFA;
    --md-surface-dim: #E5E5E5;
    --md-surface-bright: #FFFFFF;
    --md-surface-container-lowest: #FFFFFF;
    --md-surface-container-low: #F5F5F5;
    --md-surface-container: #EEEEEE;
    --md-surface-container-high: #E0E0E0;
    --md-surface-container-highest: #D4D4D4;
    --md-on-surface: #171717;
    --md-on-surface-variant: #525252;

    /* Outline */
    --md-outline: #737373;
    --md-outline-variant: #D4D4D4;

    /* Accent Gradients */
    --gradient-primary: linear-gradient(135deg, #7C3AED 0%, #A855F7 50%, #EC4899 100%);
    --gradient-secondary: linear-gradient(135deg, #0D9488 0%, #2DD4BF 100%);
    --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #EC4899 100%);
    --gradient-cool: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);

    /* Qiita Green */
    --qiita-primary: #55C500;
    --qiita-container: #ECFCCB;

    /* Shape */
    --md-shape-xs: 4px;
    --md-shape-sm: 8px;
    --md-shape-md: 12px;
    --md-shape-lg: 16px;
    --md-shape-xl: 28px;
    --md-shape-full: 9999px;

    /* Elevation */
    --md-elevation-1: 0 1px 3px 1px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.3);
    --md-elevation-2: 0 2px 6px 2px rgba(0,0,0,0.15), 0 1px 2px rgba(0,0,0,0.3);
    --md-elevation-3: 0 4px 8px 3px rgba(0,0,0,0.15), 0 1px 3px rgba(0,0,0,0.3);

    /* Motion */
    --md-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --md-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
    --md-motion-duration-short: 200ms;
    --md-motion-duration-medium: 400ms;
    --md-motion-duration-long: 600ms;
}

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

body {
    font-family: 'Noto Sans JP', system-ui, -apple-system, sans-serif;
    background-color: var(--md-surface);
    color: var(--md-on-surface);
    line-height: 1.6;
}

/* WIP Banner */
.wip-banner {
    background: linear-gradient(90deg, #F59E0B, #EF4444, #EC4899, #8B5CF6, #F59E0B);
    background-size: 200% 100%;
    animation: gradientFlow 3s linear infinite;
    color: white;
    text-align: center;
    padding: 12px 16px;
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.wip-banner i {
    margin-right: 8px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 100px 24px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -10%;
    width: 50%;
    height: 120%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.4) 0%, transparent 60%);
    border-radius: 50%;
    filter: blur(60px);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -10%;
    width: 45%;
    height: 100%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.35) 0%, transparent 60%);
    border-radius: 50%;
    filter: blur(60px);
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

/* Hero Koiキャラ */
.hero-koichara {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    margin-top: 32px;
    padding: 12px 20px 12px 12px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--md-shape-full);
    text-decoration: none;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.hero-koichara:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(236, 72, 153, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(236, 72, 153, 0.3);
}

.hero-koichara img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(236, 72, 153, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hero-koichara-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.hero-koichara-badge {
    font-size: 0.65rem;
    font-weight: 600;
    color: #F9A8D4;
    letter-spacing: 0.5px;
}

.hero-koichara-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
}

.hero-label {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    padding: 10px 24px;
    border-radius: var(--md-shape-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--md-on-primary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 8px;
    font-weight: 400;
}

.hero-location {
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
    margin-bottom: 32px;
}

.hero-location i {
    margin-right: 6px;
}

/* Social FABs */
.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.social-fab {
    width: 56px;
    height: 56px;
    border-radius: var(--md-shape-lg);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.social-fab:hover {
    transform: scale(1.1) translateY(-4px);
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.social-icon {
    width: 1.5rem;
    height: 1.5rem;
}

/* Main Content */
.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 48px 24px;
}

/* Section */
.section {
    margin-bottom: 56px;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--md-on-surface);
    margin-bottom: 24px;
    letter-spacing: -0.25px;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.card {
    background: var(--md-surface-container-low);
    border-radius: var(--md-shape-xl);
    padding: 24px;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.card:hover {
    background: var(--md-surface-container);
    box-shadow: var(--md-elevation-1);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--md-shape-lg);
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--md-on-surface);
    margin-bottom: 16px;
}

/* Chips */
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip-group.small {
    gap: 6px;
    margin-top: 12px;
}

.chip-group.achievements {
    justify-content: center;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--md-shape-sm);
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.chip.secondary {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.chip.outline {
    background: transparent;
    border: 1px solid var(--md-outline-variant);
    color: var(--md-on-surface-variant);
    padding: 6px 12px;
    font-size: 0.75rem;
}

.chip.achievement {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    color: #92400E;
    border-radius: var(--md-shape-full);
    border: 1px solid #FCD34D;
    text-decoration: none;
}

.chip.achievement i {
    color: #F59E0B;
}

/* Spec Grid */
.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--md-surface-container-low);
    border-radius: var(--md-shape-xl);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.spec-item:hover {
    background: var(--md-surface-container);
    transform: translateY(-2px);
}

.spec-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--md-shape-md);
    background: var(--gradient-secondary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
}

.spec-item span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--md-on-surface);
}

/* Project Grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

/* tapple: Coral/Pink (アイコンのピンク系) */
.project-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    background: linear-gradient(135deg, #FF7085 0%, #FF8A9B 50%, #FFA5B4 100%);
    color: white;
    border-radius: var(--md-shape-xl);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: 0 4px 20px rgba(255, 112, 133, 0.3);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(255, 112, 133, 0.4);
}

/* Koigram: Purple (アイコンの紫) */
.project-card.secondary {
    background: linear-gradient(135deg, #7E57C2 0%, #9575CD 50%, #B39DDB 100%);
    box-shadow: 0 4px 20px rgba(126, 87, 194, 0.35);
}

.project-card.secondary:hover {
    box-shadow: 0 12px 40px rgba(126, 87, 194, 0.45);
}

/* Koiキャラメーカー: Magenta/Pink (アイコンのピンク) */
.project-card.tertiary {
    background: linear-gradient(135deg, #EC407A 0%, #F06292 50%, #F48FB1 100%);
    box-shadow: 0 4px 20px rgba(236, 64, 122, 0.35);
}

.project-card.tertiary:hover {
    box-shadow: 0 12px 40px rgba(236, 64, 122, 0.45);
}

.project-card i {
    opacity: 0.7;
    transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.project-card:hover i {
    opacity: 1;
    transform: translate(4px, -4px);
}

/* Koiキャラ Card */
.koichara-card {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 20px;
    padding: 20px 28px;
    background: linear-gradient(135deg, #FDF4FF 0%, #FAE8FF 50%, #F5D0FE 100%);
    border-radius: var(--md-shape-xl);
    text-decoration: none;
    border: 2px solid #E879F9;
    box-shadow: 0 4px 20px rgba(232, 121, 249, 0.2);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    overflow: hidden;
    position: relative;
}

.koichara-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 40%;
    height: 150%;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.15) 0%, transparent 60%);
    border-radius: 50%;
}

.koichara-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(232, 121, 249, 0.3);
    border-color: #D946EF;
}

.koichara-image {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    border-radius: var(--md-shape-lg);
    overflow: hidden;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.koichara-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.koichara-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.koichara-label {
    display: inline-block;
    background: linear-gradient(135deg, #D946EF, #EC4899);
    color: white;
    padding: 4px 12px;
    border-radius: var(--md-shape-full);
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.koichara-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #86198F;
    line-height: 1.4;
    margin-bottom: 8px;
}

.koichara-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: #A21CAF;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

.koichara-card:hover .koichara-link {
    gap: 10px;
}

.koichara-link i {
    font-size: 0.75rem;
}

/* Content Grid (Slides/Articles) */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.content-card {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-shape-xl);
    overflow: hidden;
    text-decoration: none;
    box-shadow: var(--md-elevation-1);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--md-elevation-3);
}

.content-image {
    height: 160px;
    background-size: cover;
    background-position: center;
    background-color: #1a1a2e;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-image.qiita {
    background: linear-gradient(135deg, #22C55E 0%, #16A34A 50%, #15803D 100%);
}

.content-image.qiita i {
    font-size: 3rem;
    color: rgba(255,255,255,0.25);
}

.content-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 6px 12px;
    border-radius: var(--md-shape-sm);
    font-size: 0.7rem;
    font-weight: 600;
    backdrop-filter: blur(8px);
}

.content-badge.qiita {
    background: rgba(85, 197, 0, 0.9);
}

.content-body {
    padding: 20px;
}

.content-body h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--md-on-surface);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.content-date {
    font-size: 0.8rem;
    color: var(--md-on-surface-variant);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.stat-card {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-shape-xl);
    padding: 28px 16px;
    text-align: center;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    border: 1px solid var(--md-outline-variant);
    text-decoration: none;
    display: block;
}

.stat-card:hover {
    background: var(--md-primary-container);
    border-color: var(--md-primary);
    transform: translateY(-4px);
}

.stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--md-on-surface-variant);
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 60px 20px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .main-content {
        padding: 32px 16px;
    }

    .section {
        margin-bottom: 40px;
    }

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

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

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

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

    .social-fab {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .koichara-card {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }

    .koichara-image {
        width: 120px;
        height: 120px;
    }

    .koichara-name {
        font-size: 1rem;
    }
}