/* ═══════════════════════════════════════════════════════════════════════════
   ZENKAI CORPORATION — Website Styles v1.0
   © 2026 Zenkai Corporation
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   CSS Variables / Design Tokens
   ───────────────────────────────────────────────────────────────────────────── */
:root {
    /* Colors */
    --color-bg: #0a0e17;
    --color-bg-secondary: #0f1420;
    --color-bg-card: #141922;
    --color-bg-card-hover: #1a2030;

    --color-text: #e4e8f0;
    --color-text-muted: #8892a4;
    --color-text-dim: #5a6577;

    --color-primary: #00ff88;
    --color-cyan: #00d2ff;
    --color-purple: #b366ff;
    --color-red: #ff4466;
    --color-amber: #ffaa00;

    --color-primary-glow: rgba(0, 255, 136, 0.3);
    --color-cyan-glow: rgba(0, 210, 255, 0.3);
    --color-purple-glow: rgba(179, 102, 255, 0.3);
    --color-red-glow: rgba(255, 68, 102, 0.3);
    --color-amber-glow: rgba(255, 170, 0, 0.3);

    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Borders */
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Z-index layers */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
}

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

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

body {
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-cyan);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Utility Classes
   ───────────────────────────────────────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-cyan) 50%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Navigation
   ───────────────────────────────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-md) 0;
    background: transparent;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
}

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

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: var(--space-sm) var(--space-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
    color: var(--color-bg) !important;
    border-radius: var(--border-radius);
    font-weight: 600;
}

.nav-cta:hover {
    box-shadow: 0 0 20px var(--color-primary-glow);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    left: 0;
    transition: transform var(--transition-fast);
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg) translate(5px, 6px);
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg) translate(5px, -6px);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
        z-index: var(--z-modal);
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        background: var(--color-bg);
        transition: right var(--transition-base);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.25rem;
        padding: var(--space-md);
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Hero Section
   ───────────────────────────────────────────────────────────────────────────── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

#hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 255, 136, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 136, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--space-lg);
}

.hero-title {
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.title-sub {
    display: block;
    font-size: 0.35em;
    color: var(--color-text-muted);
    letter-spacing: 0.3em;
    margin-top: var(--space-sm);
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--space-md);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
}

.bolt {
    display: inline-block;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
    color: var(--color-bg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--color-primary-glow);
    color: var(--color-bg);
}

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

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.btn-icon {
    font-size: 1.1em;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-dim);
    font-size: 0.75rem;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid var(--color-text-dim);
    border-radius: 10px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 14px; opacity: 0.5; }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Section Common Styles
   ───────────────────────────────────────────────────────────────────────────── */
section {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.title-icon {
    font-size: 1em;
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Projects Section
   ───────────────────────────────────────────────────────────────────────────── */
.projects {
    background: var(--color-bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    border-left: 3px solid var(--color-primary);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary-glow) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover {
    transform: translateY(-4px);
    background: var(--color-bg-card-hover);
}

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

/* Card color variations */
.project-card[data-color="green"] { border-left-color: var(--color-primary); }
.project-card[data-color="green"]::before { background: linear-gradient(135deg, var(--color-primary-glow) 0%, transparent 50%); }

.project-card[data-color="cyan"] { border-left-color: var(--color-cyan); }
.project-card[data-color="cyan"]::before { background: linear-gradient(135deg, var(--color-cyan-glow) 0%, transparent 50%); }

.project-card[data-color="purple"] { border-left-color: var(--color-purple); }
.project-card[data-color="purple"]::before { background: linear-gradient(135deg, var(--color-purple-glow) 0%, transparent 50%); }

.project-card[data-color="amber"] { border-left-color: var(--color-amber); }
.project-card[data-color="amber"]::before { background: linear-gradient(135deg, var(--color-amber-glow) 0%, transparent 50%); }

.project-card[data-color="red"] { border-left-color: var(--color-red); }
.project-card[data-color="red"]::before { background: linear-gradient(135deg, var(--color-red-glow) 0%, transparent 50%); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.card-icon {
    font-size: 2rem;
}

.card-status {
    font-size: 0.7rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-live {
    background: rgba(0, 255, 136, 0.2);
    color: var(--color-primary);
}

.status-dev {
    background: rgba(0, 210, 255, 0.2);
    color: var(--color-cyan);
}

.status-soon {
    background: rgba(255, 170, 0, 0.2);
    color: var(--color-amber);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
}

.card-description {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.tag {
    font-size: 0.7rem;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--color-text-dim);
}

.card-link {
    font-size: 0.875rem;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.card-link.disabled {
    color: var(--color-text-dim);
    cursor: default;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Roadmap / Timeline Section
   ───────────────────────────────────────────────────────────────────────────── */
.roadmap {
    background: var(--color-bg);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-purple));
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    padding-bottom: var(--space-xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: 12px;
    top: 4px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 3px solid var(--color-text-dim);
    z-index: 1;
}

.timeline-marker.current {
    border-color: var(--color-primary);
    background: var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.timeline-content {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.badge-now {
    font-size: 0.65rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary);
    color: var(--color-bg);
    border-radius: var(--border-radius);
    font-weight: 700;
}

.timeline-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    font-size: 0.9rem;
}

.status-icon {
    flex-shrink: 0;
}

.timeline-list .done {
    color: var(--color-primary);
}

.timeline-list .progress {
    color: var(--color-amber);
}

.timeline-list .upcoming {
    color: var(--color-text-dim);
}

@media (min-width: 768px) {
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .timeline-item {
        width: 50%;
        padding-left: 0;
        padding-right: var(--space-xl);
    }

    .timeline-item:nth-child(even) {
        margin-left: 50%;
        padding-left: var(--space-xl);
        padding-right: 0;
    }

    .timeline-marker {
        left: auto;
        right: -9px;
    }

    .timeline-item:nth-child(even) .timeline-marker {
        left: -9px;
        right: auto;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Blog Section
   ───────────────────────────────────────────────────────────────────────────── */
.blog {
    background: var(--color-bg-secondary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.blog-card {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.blog-card-image {
    height: 160px;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-placeholder-img {
    font-size: 4rem;
    opacity: 0.5;
}

.blog-card-content {
    padding: var(--space-lg);
}

.blog-date {
    font-size: 0.75rem;
    color: var(--color-text-dim);
    margin-bottom: var(--space-sm);
    display: block;
}

.blog-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.blog-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.blog-link {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Footer
   ───────────────────────────────────────────────────────────────────────────── */
.footer {
    background: var(--color-bg);
    padding: var(--space-xl) 0 var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-heading {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text-muted);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border-radius: var(--border-radius);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-bg);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.copyright,
.founder {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Animations
   ───────────────────────────────────────────────────────────────────────────── */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
.delay-4 { animation-delay: 0.8s; }

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

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive Adjustments
   ───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --space-xl: 3rem;
        --space-2xl: 4rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .title-sub {
        font-size: 0.4em;
        letter-spacing: 0.15em;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

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

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .footer-links {
        width: 100%;
    }

    .social-links {
        justify-content: center;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .project-card {
        padding: var(--space-md);
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Selection & Focus Styles
   ───────────────────────────────────────────────────────────────────────────── */
::selection {
    background: var(--color-primary);
    color: var(--color-bg);
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Scrollbar
   ───────────────────────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-card);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-dim);
}