/**
 * home.css — Home page (/): hero section, Caesar cipher wheel animation,
 * feature cards, README card, footer.
 */
/* Extracted from style.css */

/* ==================== 主页 Hero ==================== */
.home-page {
    min-height: 100vh;
    padding-top: 60px;
}

.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    position: relative;
    z-index: 2;
    background: transparent;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    animation: fade-in 1s ease;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 24px;
    text-align: center;
}

.hero-title-line {
    display: block;
    color: var(--text-primary);
}

.hero-title-accent {
    display: block;
    color: var(--accent-primary);
    text-shadow: 0 0 40px rgba(var(--accent-primary-rgb), 0.3);
}

.hero-subtitle {
    font-size: 1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 32px;
    text-align: center;
}

.hero-math {
    display: block;
    margin-top: 16px;
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--accent-secondary);
    opacity: 0.8;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.hero-tag {
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
}

@keyframes fade-in {
    from { 
        opacity: 0; 
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}
/* ==================== Home 中间文案 ==================== */
.home-between {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 24px 0 60px;
    padding: 0 24px;
    position: relative;
    z-index: 10;
}

.home-between-text {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: #999;
    letter-spacing: 0.15em;
    margin: 0;
}

.home-guide-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: 0 0 40px;
    padding: 0 24px;
    position: relative;
    z-index: 10;
}

.home-guide-label {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: #666;
}

.home-guide-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-primary);
    text-decoration: none;
    border: 1px solid var(--accent-primary);
    border-radius: 4px;
    padding: 4px 12px;
    transition: all 0.25s ease;
}

.home-guide-link:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.home-scroll-hint {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
    z-index: 10;
    position: relative;
    animation: bounce-down 2s ease infinite;
}

.scroll-arrow {
    width: 28px;
    height: 28px;
    color: var(--text-muted);
    opacity: 0.5;
}

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

/* ==================== README 卡片 ==================== */
.home-readme-card {
    max-width: 520px;
    margin: 0 auto 48px;
    border: 1px solid #222;
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

.home-readme-card:hover {
    border-color: #00ff88;
    box-shadow: 0 0 24px rgba(0, 255, 136, 0.08);
}

.readme-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    background: #0a0a0a;
    border-bottom: 1px solid #1a1a1a;
}

.readme-card-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.readme-card-dot.red { background: #ff5f56; }
.readme-card-dot.yellow { background: #ffbd2e; }
.readme-card-dot.green { background: #27c93f; }

.readme-card-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #888;
    margin-left: 8px;
}

.readme-card-body {
    padding: 20px 24px;
}

.readme-card-line {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: #aaa;
    line-height: 1.8;
    margin: 0 0 8px;
}

.readme-card-line.muted {
    color: #555;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin-top: 16px;
    margin-bottom: 0;
}
/* ==================== 密钥室入口按钮 ==================== */
.vault-entrance {
    margin-top: 60px;
    position: relative;
    z-index: 2;

    background: transparent;
}

.vault-btn-wrapper {
    position: relative;
    width: 220px;
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.vault-ring-outer {
    animation: rotate-ring 30s linear infinite;
}

.vault-ring-inner {
    animation: rotate-ring 20s linear infinite reverse;
}

@keyframes rotate-ring {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.ring-svg {
    width: 100%;
    height: 100%;
}

.ring-text {
    fill: var(--accent-primary);
    font-size: 10px;
    font-family: var(--font-mono);
    letter-spacing: 2px;
    opacity: 0.4;
}

.ring-text.inner {
    font-size: 8px;
    opacity: 0.3;
}

.vault-btn {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 160px;
    height: 160px;
    background: linear-gradient(145deg, var(--bg-card), var(--bg-tertiary));
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-normal);
    box-shadow: 
        0 0 30px rgba(var(--accent-primary-rgb), 0.2),
        inset 0 0 30px rgba(var(--accent-primary-rgb), 0.05);
}

.vault-btn:hover {
    transform: scale(1.05);
    box-shadow: 
        0 0 50px rgba(var(--accent-primary-rgb), 0.3),
        inset 0 0 40px rgba(var(--accent-primary-rgb), 0.1);
    border-color: var(--accent-primary);
}

.vault-btn:active {
    transform: scale(0.98);
}

.vault-btn-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.vault-icon {
    color: var(--accent-primary);
    transition: all var(--transition-normal);
}

.vault-btn:hover .vault-icon {
    transform: translateY(-3px);
    filter: drop-shadow(0 0 10px rgba(var(--accent-primary-rgb), 0.5));
}

.vault-icon svg .lock-top {
    transition: all var(--transition-normal);
}

.vault-btn:hover .vault-icon svg .lock-top {
    transform-origin: center;
    animation: unlock-pulse 1s ease infinite;
}

@keyframes unlock-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.vault-btn-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.vault-btn-subtext {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    max-width: 100px;
}

.vault-btn-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(var(--accent-primary-rgb), 0.15) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.vault-btn:hover .vault-btn-glow {
    opacity: 1;
    animation: glow-pulse 2s ease infinite;
}

@keyframes glow-pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}
/* ==================== 主页页脚 ==================== */
.home-footer {
    padding: 60px 24px;
    text-align: center;
    position: relative;
    z-index: 10;
}

.footer-symbol {
    font-size: 2rem;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.footer-text {
    font-size: 1rem;
    color: #e0e0e0;
    margin-bottom: 8px;
}

.footer-formula {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #666;
}