/* ========================================
   エンタメポータル - Bento Grid Style
   ======================================== */

:root {
    /* Colors - エンタメらしく */
    --bg-primary: #1A1A2E;
    --bg-card: #16213E;
    --text-primary: #EAEAEA;
    --text-secondary: #9CA3AF;
    --text-white: #FFFFFF;

    /* Category Colors */
    --novel-start: #EC4899;
    --novel-end: #F472B6;
    --game-start: #8B5CF6;
    --game-end: #A78BFA;
    --manga-start: #F59E0B;
    --manga-end: #FBBF24;

    /* Hero Gradient */
    --hero-start: #7C3AED;
    --hero-end: #EC4899;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border Radius */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Shadows */
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

#app {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: 100px;
}

/* ========================================
   Header
   ======================================== */
.header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--hero-start), var(--hero-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.back-link {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.back-link:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.tagline {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========================================
   Hero
   ======================================== */
.hero {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--hero-start) 0%, var(--hero-end) 100%);
    color: var(--text-white);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 10px 20px -10px rgba(124, 58, 237, 0.4);
}

.hero-icon {
    font-size: 3.5rem;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.2);
}

.hero-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.hero-message {
    font-size: 0.9rem;
    opacity: 0.95;
}

/* ========================================
   Section
   ======================================== */
.section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-xs);
}

/* ========================================
   App Grid
   ======================================== */
.app-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.app-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.app-novel::before { background: linear-gradient(180deg, var(--novel-start), var(--novel-end)); }
.app-game::before { background: linear-gradient(180deg, var(--game-start), var(--game-end)); }
.app-manga::before { background: linear-gradient(180deg, var(--manga-start), var(--manga-end)); }

.app-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.app-card:active {
    transform: scale(0.98);
}

.app-icon {
    font-size: 2.5rem;
}

.app-info {
    flex: 1;
}

.app-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.app-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.app-arrow {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.app-card:hover .app-arrow {
    transform: translateX(4px);
}

/* ========================================
   About
   ======================================== */
.about-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    font-size: 0.9rem;
}

.about-card p {
    margin-bottom: var(--spacing-sm);
}

.about-card p:last-child {
    margin-bottom: 0;
}

.about-note {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

.footer a {
    color: var(--text-secondary);
    text-decoration: underline;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero, .app-card, .about-card {
    animation: fadeIn 0.4s ease forwards;
}

.app-card:nth-child(1) { animation-delay: 0.1s; }
.app-card:nth-child(2) { animation-delay: 0.15s; }
.app-card:nth-child(3) { animation-delay: 0.2s; }