/* === Design System === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    /* Colors */
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1420;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    --text-primary: #f0f2f5;
    --text-secondary: #8a92a1;
    --text-tertiary: #5a6170;

    --accent: #4f8ff7;
    --accent-hover: #6ba1ff;
    --accent-dim: rgba(79, 143, 247, 0.12);
    --accent-glow: rgba(79, 143, 247, 0.25);
    --green: #34d399;
    --green-dim: rgba(52, 211, 153, 0.12);
    --yellow: #fbbf24;
    --red: #f87171;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-pad: clamp(80px, 10vw, 120px);
    --container: 1120px;

    /* Transitions */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--accent-hover); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* === Animations === */
.anim {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.anim.visible {
    opacity: 1;
    transform: translateY(0);
}

/* stagger children */
.cards .anim:nth-child(2) { transition-delay: 0.08s; }
.cards .anim:nth-child(3) { transition-delay: 0.16s; }
.cards .anim:nth-child(4) { transition-delay: 0.24s; }
.cards .anim:nth-child(5) { transition-delay: 0.32s; }
.cards .anim:nth-child(6) { transition-delay: 0.40s; }

.why-grid .anim:nth-child(2) { transition-delay: 0.08s; }
.why-grid .anim:nth-child(3) { transition-delay: 0.16s; }
.why-grid .anim:nth-child(4) { transition-delay: 0.24s; }

/* === Header === */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}

.header.scrolled { background: rgba(10, 14, 23, 0.95); }

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Logo */
.logo {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0;
    text-decoration: none;
}

.logo:hover { color: var(--text-primary); }

.logo-prompt {
    color: var(--green);
    margin-right: 6px;
}

.logo-dot { color: var(--text-tertiary); }
.logo-tld { color: var(--text-secondary); }

.logo-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
    margin-left: 2px;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
}

.logo-sm { font-size: 1rem; }
.logo-sm .logo-cursor { display: none; }

@keyframes blink { 50% { opacity: 0; } }

/* Nav */
.nav { display: flex; align-items: center; gap: 32px; }
.nav a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color .2s;
    position: relative;
}
.nav a:hover { color: var(--text-primary); }

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0; right: 0;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform .2s var(--ease);
}

.nav a:hover::after { transform: scaleX(1); }

.lang-btn {
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid transparent;
    padding: 6px 14px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    border-radius: 6px;
    transition: all .2s var(--ease);
    letter-spacing: 0.5px;
}

.lang-btn:hover {
    background: transparent;
    border-color: var(--accent);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all .3s var(--ease);
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* === Hero === */
.hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.4;
    pointer-events: none;
}

.hero-container { position: relative; z-index: 1; }

.hero-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid rgba(79, 143, 247, 0.2);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 28px;
    letter-spacing: 0.3px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-accent {
    background: linear-gradient(135deg, var(--accent), var(--green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: clamp(1rem, 1.8vw, 1.125rem);
    color: var(--text-secondary);
    max-width: 620px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 620px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.hero-avail {
    font-size: 0.9rem;
    color: var(--accent);
    max-width: 620px;
    line-height: 1.8;
    margin-bottom: 32px;
    font-weight: 500;
}

/* Terminal widget */
.hero-terminal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    max-width: 660px;
    margin-bottom: 36px;
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
}

.terminal-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
}

.terminal-dot.red { background: var(--red); opacity: 0.7; }
.terminal-dot.yellow { background: var(--yellow); opacity: 0.7; }
.terminal-dot.green { background: var(--green); opacity: 0.7; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-left: auto;
}

.terminal-body {
    padding: 16px 20px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 2;
    color: var(--text-secondary);
    min-height: 260px;
}

.terminal-line { min-height: 1.6em; }

/* Terminal text colors */
.t-green { color: var(--green); font-weight: 700; }
.t-dim { color: var(--text-tertiary); font-style: italic; }

/* ASCII art */
.ascii-art {
    font-size: 0.55rem;
    line-height: 1.15;
    margin: 12px 0 8px;
    letter-spacing: 0.5px;
}

.ascii-line {
    white-space: pre;
    animation: asciiReveal 0.3s ease-out both;
}

.ascii-color-1 { color: #fbbf24; text-shadow: 0 0 8px rgba(251, 191, 36, 0.3); }
.ascii-color-2 { color: #f59e0b; text-shadow: 0 0 6px rgba(245, 158, 11, 0.25); }
.ascii-color-3 { color: #fbbf24; text-shadow: 0 0 10px rgba(251, 191, 36, 0.35); }
.ascii-color-4 { color: #f59e0b; text-shadow: 0 0 6px rgba(245, 158, 11, 0.25); }
.ascii-color-5 { color: #fbbf24; text-shadow: 0 0 8px rgba(251, 191, 36, 0.3); }

@keyframes asciiReveal {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.ascii-hu {
    color: var(--green);
    font-size: 0.82rem;
    font-weight: 700;
    text-align: right;
    padding-right: 8px;
    margin-top: 2px;
    text-shadow: 0 0 8px rgba(52, 211, 153, 0.4);
}

/* Welcome text */
.t-welcome {
    color: #fbbf24;
    font-size: 1.1rem;
    font-weight: 700;
    margin: 16px 0 8px;
    text-shadow: 0 0 12px rgba(251, 191, 36, 0.3);
    text-align: center;
}

/* Terminal list */
.term-list {
    margin: 8px 0 12px 8px;
}

.t-list-item {
    color: var(--text-primary);
    font-size: 0.82rem;
    line-height: 2;
    animation: listFadeIn 0.3s ease-out both;
}

@keyframes listFadeIn {
    from { opacity: 0; transform: translateX(-8px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Connection established */
.t-established {
    color: var(--green);
    font-size: 0.78rem;
    margin-top: 8px;
    border-top: 1px solid var(--border);
    padding-top: 8px;
}

.t-pulse {
    display: inline-block;
    color: var(--green);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.t-prompt { color: var(--green); font-weight: 700; }
.t-cmd { color: var(--text-primary); }
.t-dim { color: var(--text-tertiary); font-style: italic; }
.t-input { color: var(--accent); }
.t-success { color: var(--green); }

/* Hero buttons */
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all .25s var(--ease);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    box-shadow: 0 0 30px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.03);
}

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

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(1.5rem, 3vw, 2.1rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-secondary);
    max-width: 560px;
    font-size: 1rem;
    line-height: 1.8;
}

/* === Services === */
.services {
    padding: var(--section-pad) 0;
    border-top: 1px solid var(--border);
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px 28px;
    transition: all .3s var(--ease);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity .3s;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.card:hover::before { opacity: 1; }

.card-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 10px;
    margin-bottom: 20px;
}

.card-accent { border-color: rgba(79, 143, 247, 0.2); }
.card-accent .card-icon { background: var(--green-dim); color: var(--green); }

.card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.8;
}

.card-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.card-list li {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
    padding: 4px 0 4px 18px;
    position: relative;
}

.card-list li::before {
    content: '▪';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 0.7rem;
}

/* === Why Us === */
.why-us {
    padding: var(--section-pad) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.why-item {
    padding: 32px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-card);
    transition: border-color .2s;
}

.why-item:hover { border-color: var(--border-hover); }

.why-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
    opacity: 0.6;
}

.why-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.why-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.8;
}

/* === Claude Section === */
.claude-section {
    padding: var(--section-pad) 0;
    border-bottom: 1px solid var(--border);
}

.claude-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.claude-content h2 {
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.claude-desc {
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.claude-features { display: flex; flex-direction: column; gap: 14px; }

.claude-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.claude-check {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--green-dim);
    color: var(--green);
    border-radius: 50%;
    flex-shrink: 0;
}

.claude-visual { display: flex; justify-content: center; }

.claude-terminal {
    width: 100%;
    max-width: 400px;
}

.claude-terminal .terminal-body p {
    margin-bottom: 4px;
    font-size: 0.82rem;
}

/* === Contact === */
.contact {
    padding: var(--section-pad) 0;
    background: var(--bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 48px;
    margin-top: 0;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
}

.contact-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    color: var(--text-secondary);
}

.contact-row svg { flex-shrink: 0; color: var(--text-tertiary); }

.contact-form { display: flex; flex-direction: column; gap: 16px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: all .2s var(--ease);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.hp-field {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    width: 0;
    pointer-events: none;
}

.form-status {
    font-size: 0.85rem;
    min-height: 1.5em;
}

.form-status.success { color: var(--green); }
.form-status.error { color: var(--red); }

/* === Footer === */
.footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left { display: flex; flex-direction: column; gap: 8px; }

.footer-tagline {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.footer-right {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .cards { grid-template-columns: repeat(2, 1fr); }
    .claude-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0; right: 0;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border);
    }

    .nav.open { display: flex; }
    .menu-toggle { display: flex; }

    .hero { padding: 130px 0 60px; }
    .hero h1 { font-size: clamp(1.6rem, 6vw, 2.4rem); }

    .cards { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }

    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .form-row { grid-template-columns: 1fr; }

    .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}