:root {
    --bg-canvas: #080808;
    --text-ink: #e5e5e5;
    --text-subtle: #666666;
    --border-ink: #333333;
    --accent-alert: #ff4d4d;
    --accent-gain: #00ff9d;
    --accent-primary: #e5e5e5; /* 极简黑白为主 */
    
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --font-sans: 'Inter', -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-canvas);
    color: var(--text-ink);
    font-family: var(--font-sans);
    margin: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.05em;
}

.font-mono { font-family: var(--font-mono); }
.text-subtle { color: var(--text-subtle); }
.text-gain { color: var(--accent-gain); }
.text-alert { color: var(--accent-alert); }

/* Layout Utilities */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.h-screen { height: 100vh; }
.w-full { width: 100%; }

/* Backwards-compatible components (for existing templates) */
.muted { color: var(--text-subtle); font-family: var(--font-mono); font-size: 0.8rem; }
.card {
    border: 1px solid var(--border-ink);
    background: rgba(255, 255, 255, 0.02);
    padding: 1.5rem;
    margin: 1.25rem 0;
}
.label { display: block; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; opacity: 0.6; margin-bottom: 0.5rem; }
.input {
    width: 100%;
    padding: 0.9rem 0.75rem;
    background: transparent;
    border: 1px solid var(--border-ink);
    color: var(--text-ink);
    font-family: var(--font-mono);
    font-size: 1rem;
    outline: none;
}
.input:focus { border-color: var(--accent-gain); }
.checkbox { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-subtle); margin: 1rem 0; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--text-ink);
    color: var(--bg-canvas);
    border: 1px solid var(--text-ink);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s, color 0.15s;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.link { text-decoration: underline; font-family: var(--font-mono); font-size: 0.85rem; opacity: 0.85; }
.actions { margin-top: 0.75rem; }
.pre {
    white-space: pre-wrap;
    word-break: break-word;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-ink);
    padding: 1rem;
    margin: 0.75rem 0 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.65;
}

/* Grid System (Manual) */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    border-top: 1px solid var(--border-ink);
    border-left: 1px solid var(--border-ink);
}

.grid-item {
    border-right: 1px solid var(--border-ink);
    border-bottom: 1px solid var(--border-ink);
    padding: 1.5rem;
    position: relative;
}

.grid-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    opacity: 0.5;
    margin-bottom: 0.5rem;
}

/* Nav */
nav {
    border-bottom: 1px solid var(--border-ink);
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.nav-brand {
    font-weight: 900;
    font-family: var(--font-sans);
    font-size: 1rem;
    letter-spacing: -0.05em;
}

/* Hero Section */
.hero-wrapper {
    position: relative;
    padding: 6rem 2rem;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.bg-grid-hint {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--border-ink) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.2;
    pointer-events: none;
    z-index: 0;
}

.hero-title {
    font-size: clamp(4rem, 12vw, 8rem);
    line-height: 0.85;
    font-weight: 900;
    color: var(--text-ink);
    mix-blend-mode: normal; /* dark theme doesn't need darken blend */
    margin-bottom: 3rem;
    z-index: 10;
    text-transform: uppercase;
}

/* Search Input */
.search-container {
    width: 100%;
    max-width: 800px;
    position: relative;
    z-index: 10;
}

.search-label {
    position: absolute;
    top: -1.5rem;
    left: 0;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    opacity: 0.5;
}

.search-box {
    display: flex;
    border-bottom: 4px solid var(--text-ink);
    background: transparent;
    transition: border-color 0.2s;
}

.search-box:focus-within {
    border-color: var(--accent-gain);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-ink);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-family: var(--font-mono);
    font-weight: 700;
    padding: 1.5rem 0;
    outline: none;
}

.search-input::placeholder {
    color: var(--border-ink);
    opacity: 0.5;
}

.search-btn {
    background: transparent;
    border: none;
    color: var(--text-ink);
    cursor: pointer;
    padding: 0 1.5rem;
    transition: transform 0.2s;
}

.search-btn:hover {
    color: var(--accent-gain);
    transform: translateX(4px);
}

/* Digest Card (Simple) */
.digest-card {
    border: 1px solid var(--border-ink);
    padding: 1.5rem;
    margin-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255,255,255,0.02);
}

.digest-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-subtle);
}

.btn-outline {
    border: 1px solid var(--text-ink);
    background: transparent;
    color: var(--text-ink);
    padding: 0.5rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-outline:hover {
    background: var(--text-ink);
    color: var(--bg-canvas);
}

/* Boost Checkbox */
.boost-wrap {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-subtle);
}

/* Markdown Content */
.markdown-body {
    font-family: var(--font-sans);
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
}
.markdown-body h1, .markdown-body h2 { border-bottom: 1px solid var(--border-ink); padding-bottom: 0.5rem; margin-top: 2rem; }
.markdown-body ul { padding-left: 1.5rem; }
.markdown-body blockquote { border-left: 3px solid var(--accent-gain); margin-left: 0; padding-left: 1rem; color: var(--text-subtle); }