/* ========================================
   Xenthyr — Design System & Styles
   ======================================== */

/* --- Reset & Variables --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #06080D;
    --bg-elevated: #0C0F18;
    --bg-card: #10131E;
    --bg-card-hover: #161A2A;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --text-primary: #F0F2F5;
    --text-secondary: #8A8F9E;
    --text-tertiary: #555B6E;

    --accent-cyan: #00F0FF;
    --accent-purple: #7B61FF;
    --accent-pink: #FF3D8E;

    --gradient-main: linear-gradient(135deg, #00F0FF 0%, #7B61FF 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(0, 240, 255, 0.1) 0%, rgba(123, 97, 255, 0.1) 100%);
    --gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 240, 255, 0.04), transparent 40%);

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

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    --nav-h: 72px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

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

img, svg {
    display: block;
    max-width: 100%;
}

::selection {
    background: rgba(0, 240, 255, 0.2);
    color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Ambient Background --- */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
}

.bg-glow-1 {
    width: 600px;
    height: 600px;
    background: rgba(0, 240, 255, 0.05);
    top: -200px;
    right: -100px;
    animation: drift1 20s ease-in-out infinite;
}

.bg-glow-2 {
    width: 500px;
    height: 500px;
    background: rgba(123, 97, 255, 0.05);
    bottom: -200px;
    left: -100px;
    animation: drift2 25s ease-in-out infinite;
}

@keyframes drift1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-80px, 60px); }
}

@keyframes drift2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(60px, -80px); }
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 1000;
    transition: all 0.4s var(--ease-out);
    background: transparent;
}

.nav.scrolled {
    background: rgba(6, 8, 13, 0.85);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-h);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s;
    font-weight: 400;
}

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--text-secondary);
    transition: all 0.3s var(--ease-out);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4.5px, 4.5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4.5px, -4.5px);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    padding: 16px 24px 24px;
    background: rgba(6, 8, 13, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.mobile-menu.open {
    display: flex;
}

.mobile-link {
    padding: 12px 0;
    font-size: 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

/* --- CTA Buttons --- */
.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-sans);
    color: #000;
    background: var(--gradient-main);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.cta-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 240, 255, 0.2), 0 0 60px rgba(123, 97, 255, 0.1);
}

.cta-btn:hover::before {
    opacity: 1;
}

.cta-btn-sm {
    padding: 8px 20px;
    font-size: 0.8rem;
    border-radius: 6px;
}

.cta-btn-lg {
    padding: 14px 32px;
    font-size: 0.95rem;
}

.cta-btn-outline {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    background: transparent;
    border: 1px solid var(--border-hover);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
}

.cta-btn-outline:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.08);
}

/* --- Hero --- */
.hero {
    position: relative;
    z-index: 1;
    padding: calc(var(--nav-h) + 80px) 0 60px;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.06);
    border: 1px solid rgba(0, 240, 255, 0.15);
    border-radius: 100px;
    margin-bottom: 32px;
    letter-spacing: 0.03em;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-cyan);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(0, 240, 255, 0); }
}

.hero-title {
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.035em;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

/* --- Terminal --- */
.terminal {
    max-width: 740px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255,255,255,0.03);
}

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

.terminal-dots {
    display: flex;
    gap: 7px;
    margin-right: 16px;
}

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

.dot-red { background: #FF5F57; }
.dot-yellow { background: #FEBC2E; }
.dot-green { background: #28C840; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-tertiary);
}

.terminal-body {
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.9;
}

.terminal-line {
    opacity: 0;
    transform: translateY(8px);
    animation: termLine 0.4s var(--ease-out) forwards;
}

@keyframes termLine {
    to { opacity: 1; transform: translateY(0); }
}

.t-prompt {
    color: var(--accent-cyan);
    margin-right: 8px;
}

.t-cmd {
    color: var(--text-primary);
}

.t-info {
    color: var(--accent-purple);
    margin-right: 8px;
}

.t-warn {
    color: var(--accent-pink);
    margin-right: 8px;
}

.t-success {
    color: #28C840;
    margin-right: 8px;
}

.t-text {
    color: var(--text-secondary);
}

.t-highlight {
    color: var(--accent-pink);
}

/* --- Stats --- */
.stats-section {
    position: relative;
    z-index: 1;
    padding: 80px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline;
}

.stat-suffix {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- Sections --- */
.section {
    position: relative;
    z-index: 1;
    padding: 120px 0;
}

.section-dark {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-cyan);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 20px;
}

.section-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Capabilities --- */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.capability-card {
    padding: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.4s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-main);
    opacity: 0;
    transition: opacity 0.4s;
}

.capability-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

.cap-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent-cyan);
}

.cap-icon svg {
    width: 28px;
    height: 28px;
}

.cap-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.cap-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* --- Steps --- */
.steps {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.step {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 32px;
    align-items: center;
    padding: 40px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.4s var(--ease-out);
}

.step:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.03);
}

.step-number {
    font-size: 3.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    letter-spacing: -0.03em;
}

.step-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.step-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon-wrap {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
}

.step-icon-wrap svg {
    width: 48px;
    height: 48px;
}

/* --- Comparison --- */
.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.compare-col {
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.compare-old {
    background: var(--bg-card);
}

.compare-new {
    background: var(--bg-card);
    border-color: rgba(0, 240, 255, 0.2);
    position: relative;
}

.compare-badge {
    position: absolute;
    top: -12px;
    left: 32px;
    padding: 4px 16px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #000;
    background: var(--gradient-main);
    border-radius: 100px;
}

.compare-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.compare-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

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

.compare-x {
    color: var(--accent-pink);
    font-weight: 600;
    font-size: 0.9rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.compare-check {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

/* --- CTA Section --- */
.cta-section {
    padding: 120px 0;
}

.cta-card {
    text-align: center;
    padding: 80px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.cta-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 16px;
    position: relative;
}

.cta-sub {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 36px;
    line-height: 1.6;
    position: relative;
}

.cta-form {
    display: flex;
    gap: 12px;
    max-width: 480px;
    margin: 0 auto;
    position: relative;
}

.cta-input {
    flex: 1;
    padding: 14px 20px;
    font-size: 0.9rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg);
    border: 1px solid var(--border-hover);
    border-radius: 8px;
    outline: none;
    transition: all 0.3s var(--ease-out);
}

.cta-input::placeholder {
    color: var(--text-tertiary);
}

.cta-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
}

.cta-note {
    margin-top: 16px;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    position: relative;
}

/* --- Footer --- */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    padding: 60px 0 32px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 48px;
}

.footer-tagline {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    line-height: 1.5;
}

.footer-links-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-heading {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin-bottom: 20px;
}

.footer-col {
    display: flex;
    flex-direction: column;
}

.footer-link {
    font-size: 0.88rem;
    color: var(--text-secondary);
    padding: 6px 0;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.social-link {
    color: var(--text-tertiary);
    transition: color 0.2s;
    display: flex;
    align-items: center;
}

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

/* --- Scroll Animations --- */
[data-animate] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

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

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero {
        padding-top: calc(var(--nav-h) + 48px);
    }

    .hero-title {
        font-size: clamp(2.2rem, 8vw, 3.2rem);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

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

    .step {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 28px;
    }

    .step-number {
        font-size: 2rem;
    }

    .step-visual {
        display: none;
    }

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

    .cta-form {
        flex-direction: column;
    }

    .cta-card {
        padding: 48px 24px;
    }

    .section {
        padding: 80px 0;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .footer-links-group {
        grid-template-columns: 1fr;
    }
}