/* ===========================================
   99x.dev - Shared Styles
   =========================================== */

:root {
    --black: #0a0a0a;
    --white: #f5f5f3;
    --cream: #e8e6e1;
    --accent: #ff4d00;
    --accent-dim: #cc3d00;
    --gray: #6b6b6b;
    --gray-dark: #2a2a2a;
    --gray-light: #a0a0a0;

    /* Theme colors */
    --bg: var(--black);
    --text: var(--white);
    --text-muted: var(--gray-light);
    --text-subtle: var(--gray);
    --border: var(--gray-dark);
    --surface: var(--gray-dark);
}

[data-theme="light"] {
    --bg: #f5f5f3;
    --text: #0a0a0a;
    --text-muted: #4a4a4a;
    --text-subtle: #6b6b6b;
    --border: #d4d4d0;
    --surface: #e8e6e1;
    --accent: #d43d00;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 300;
    line-height: 1.6;
    overflow-x: hidden;
    cursor: default;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Grain overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 9999;
}

/* Selection */
::selection {
    background: var(--accent);
    color: var(--black);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 0;
}

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

/* ===========================================
   Navigation
   =========================================== */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border);
    position: relative;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.logo:hover {
    border-color: var(--accent);
    background: rgba(255, 77, 0, 0.05);
}

.logo::before {
    content: '>';
    color: var(--accent);
    margin-right: 0.5rem;
    animation: blink 1s step-end infinite;
}

.logo::after {
    content: '_';
    color: var(--accent);
    margin-left: 0.1rem;
    animation: blink 1s step-end infinite;
}

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

.logo .dot {
    color: var(--accent);
    margin: 0 0.1rem;
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-links a {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text);
    text-decoration: none;
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--accent);
}

.nav-links a.active::after {
    background: var(--accent);
}

/* ===========================================
   Buttons
   =========================================== */

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 2.5rem;
    background: var(--accent);
    color: #0a0a0a;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    text-decoration: none;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(255, 77, 0, 0.3);
}

.btn-primary .arrow {
    transition: transform 0.3s ease;
}

.btn-primary:hover .arrow {
    transform: translateX(4px);
}

.btn-secondary {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-decoration: none;
    position: relative;
    padding-bottom: 4px;
    transition: color 0.3s ease;
}

.btn-secondary::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--text-subtle);
    transition: background 0.3s ease;
}

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

.btn-secondary:hover::after {
    background: var(--text);
}

/* ===========================================
   Footer
   =========================================== */

footer {
    padding: 3rem 4rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-left {
    font-size: 0.7rem;
    color: var(--text-subtle);
    letter-spacing: 0.1em;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links span {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-subtle);
    cursor: default;
    transition: color 0.3s ease;
}

.footer-links span:hover {
    color: var(--text);
}

/* ===========================================
   Theme Toggle
   =========================================== */

.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 1000;
}

.theme-toggle:hover {
    border-color: var(--accent);
    background: var(--surface);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(-90deg);
}

.theme-toggle .icon-moon {
    opacity: 1;
    transform: rotate(0deg);
}

[data-theme="light"] .theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0deg);
}

[data-theme="light"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(90deg);
}

/* ===========================================
   Animations
   =========================================== */

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

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

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===========================================
   Responsive - Shared
   =========================================== */

@media (max-width: 1024px) {
    nav {
        padding: 1.5rem 2rem;
    }

    footer {
        padding: 2rem;
    }
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--border);
    cursor: pointer;
    padding: 8px;
    transition: border-color 0.3s ease;
}

.menu-toggle:hover {
    border-color: var(--accent);
}

.menu-bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 999;
    }

    .nav-links.open {
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        font-size: 1.2rem;
        letter-spacing: 0.2em;
    }

    /* Hamburger animation when open */
    .menu-toggle.open {
        z-index: 1001;
        position: fixed;
        top: 1.5rem;
        right: 2rem;
    }

    .menu-toggle.open .menu-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.open .menu-bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.open .menu-bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}

/* ===========================================
   Hero Section (index.html)
   =========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 4rem 4rem;
    position: relative;
}

.hero-content {
    max-width: 1400px;
    width: 100%;
}

.hero-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--text-muted);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.hero-title {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(3.5rem, 12vw, 10rem);
    font-weight: 400;
    line-height: 0.9;
    letter-spacing: -0.03em;
    margin-bottom: 3rem;
}

.hero-title .line {
    display: block;
    overflow: hidden;
}

.hero-title .line span {
    display: block;
    opacity: 0;
    transform: translateY(100%);
    animation: revealLine 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-title .line:nth-child(1) span { animation-delay: 0.4s; }
.hero-title .line:nth-child(2) span { animation-delay: 0.5s; }
.hero-title .line:nth-child(3) span { animation-delay: 0.6s; }

.hero-title em {
    font-style: italic;
    color: var(--accent);
}

.hero-description {
    max-width: 520px;
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.8;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease forwards;
    animation-delay: 0.8s;
}

.hero-cta {
    margin-top: 4rem;
    display: flex;
    gap: 2rem;
    align-items: center;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease forwards;
    animation-delay: 1s;
}

/* ===========================================
   Neural Network (index.html)
   =========================================== */

.hero-neural {
    position: absolute;
    right: 6%;
    top: 50%;
    transform: translateY(-50%);
    width: 40vw;
    height: 40vw;
    max-width: 550px;
    max-height: 550px;
    opacity: 0;
    animation: fadeIn 1.5s ease forwards;
    animation-delay: 0.6s;
}

.neural-svg {
    width: 100%;
    height: 100%;
    overflow: visible;
}

.neural-connection {
    stroke: var(--border);
    stroke-width: 1;
    fill: none;
    opacity: 0.6;
}

.neural-connection.active {
    stroke: var(--accent);
    opacity: 0;
    animation: pulse-line 3s ease-in-out infinite;
}

.neural-connection.active:nth-child(2) { animation-delay: 0.5s; }
.neural-connection.active:nth-child(3) { animation-delay: 1s; }
.neural-connection.active:nth-child(4) { animation-delay: 1.5s; }
.neural-connection.active:nth-child(5) { animation-delay: 2s; }
.neural-connection.active:nth-child(6) { animation-delay: 0.3s; }
.neural-connection.active:nth-child(7) { animation-delay: 0.8s; }
.neural-connection.active:nth-child(8) { animation-delay: 1.3s; }
.neural-connection.active:nth-child(9) { animation-delay: 1.8s; }
.neural-connection.active:nth-child(10) { animation-delay: 2.3s; }

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

.neural-node {
    fill: var(--bg);
    stroke: var(--border);
    stroke-width: 1.5;
    transition: all 0.3s ease;
}

.neural-node.input {
    stroke: var(--text-subtle);
}

.neural-node.shared {
    stroke: var(--text-subtle);
}

.neural-node.actor {
    stroke: #00d4aa;
}

.neural-node.actor-output {
    stroke: #00d4aa;
    filter: drop-shadow(0 0 8px rgba(0, 212, 170, 0.4));
}

.neural-node.critic {
    stroke: var(--accent);
}

.neural-node.critic-output {
    stroke: var(--accent);
    filter: drop-shadow(0 0 8px rgba(255, 77, 0, 0.4));
}

.neural-node-core {
    fill: var(--border);
    transition: fill 0.3s ease;
}

.neural-node.actor-output .neural-node-core {
    fill: #00d4aa;
    animation: glow-pulse 2s ease-in-out infinite;
}

.neural-node.critic-output .neural-node-core {
    fill: var(--accent);
    animation: glow-pulse 2s ease-in-out infinite;
    animation-delay: 1s;
}

.neural-connection.actor-conn {
    stroke: rgba(0, 212, 170, 0.3);
}

.neural-connection.actor-conn.active {
    stroke: #00d4aa;
}

.neural-connection.critic-conn {
    stroke: rgba(255, 77, 0, 0.3);
}

.neural-connection.critic-conn.active {
    stroke: var(--accent);
}

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

.neural-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 8px;
    fill: var(--text-subtle);
    text-anchor: middle;
    letter-spacing: 0.1em;
}

.neural-label.actor-label {
    fill: #00d4aa;
}

.neural-label.critic-label {
    fill: var(--accent);
}

.branch-line {
    stroke-width: 1;
    opacity: 0.3;
    stroke-dasharray: 4 2;
}

.branch-line.actor-branch {
    stroke: #00d4aa;
}

.branch-line.critic-branch {
    stroke: var(--accent);
}

/* ===========================================
   Services Section (index.html)
   =========================================== */

.services {
    padding: 10rem 4rem;
    border-top: 1px solid var(--border);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 6rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.section-number {
    font-size: 0.7rem;
    color: var(--text-subtle);
    letter-spacing: 0.2em;
}

.section-title {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    max-width: 600px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1px;
    background: var(--border);
}

.service-card {
    background: var(--bg);
    padding: 3rem;
    position: relative;
    transition: background 0.4s ease;
}

.service-card:hover {
    background: var(--surface);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 3rem;
    right: 3rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-subtle);
    transition: background 0.3s ease, transform 0.3s ease;
}

.service-card:hover::before {
    background: var(--accent);
    transform: scale(1.5);
}

.service-number {
    font-size: 0.65rem;
    color: var(--text-subtle);
    letter-spacing: 0.2em;
    margin-bottom: 2rem;
}

.service-title {
    font-family: 'Syne', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
}

.service-description {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.8;
}

/* ===========================================
   About Section (index.html)
   =========================================== */

.about {
    padding: 10rem 4rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8rem;
    align-items: center;
    border-top: 1px solid var(--border);
}

.about-content {
    max-width: 500px;
}

.about-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--text-subtle);
    margin-bottom: 2rem;
}

.about-title {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 2rem;
}

.about-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

/* ===========================================
   Tech Stack (index.html)
   =========================================== */

.tech-stack {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.tech-category {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.tech-category-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--text-subtle);
}

.tech-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-chip {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    padding: 0.5rem 0.9rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    letter-spacing: 0.02em;
    transition: all 0.3s ease;
}

.tech-chip:hover {
    border-color: var(--text);
    color: var(--text);
    background: var(--surface);
}

.tech-chip.accent {
    border-color: var(--accent);
    color: var(--accent);
}

.tech-chip.accent:hover {
    background: rgba(255, 77, 0, 0.1);
    box-shadow: 0 0 20px rgba(255, 77, 0, 0.2);
}

/* ===========================================
   Contact Section (index.html)
   =========================================== */

.contact {
    padding: 10rem 4rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.contact-title {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(3rem, 10vw, 8rem);
    font-weight: 400;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.contact-title a {
    color: var(--text);
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

.contact-title a:hover {
    color: var(--accent);
}

.contact-subtitle {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--text-subtle);
}

/* ===========================================
   Page Header (blog.html)
   =========================================== */

.page-header {
    padding: 12rem 4rem 6rem;
    border-bottom: 1px solid var(--border);
}

.page-header-content {
    max-width: 800px;
}

.page-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--text-subtle);
    margin-bottom: 1.5rem;
}

.page-title {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.page-description {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 500px;
}

/* ===========================================
   Blog Posts (blog.html)
   =========================================== */

.blog-posts {
    padding: 4rem;
    max-width: 1200px;
}

.blog-post {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 3rem;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    transition: background 0.3s ease;
}

.blog-post:first-child {
    padding-top: 0;
}

.blog-post:hover {
    background: rgba(255, 255, 255, 0.02);
}

.blog-post:hover .blog-post-title {
    color: var(--accent);
}

.blog-post-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.blog-post-date {
    font-size: 0.7rem;
    color: var(--text-subtle);
    letter-spacing: 0.1em;
}

.blog-post-tag {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--accent);
    width: fit-content;
}

.blog-post-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.blog-post-title {
    font-family: 'Syne', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
}

.blog-post-excerpt {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 600px;
}

.blog-post-read {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-subtle);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.blog-post:hover .blog-post-read {
    color: var(--accent);
}

.blog-post:hover .blog-post-read .arrow {
    transform: translateX(4px);
}

.blog-post-read .arrow {
    transition: transform 0.3s ease;
}

/* Empty State */
.blog-empty {
    padding: 6rem 4rem;
    text-align: center;
}

.blog-empty-icon {
    font-size: 3rem;
    margin-bottom: 2rem;
    opacity: 0.3;
}

.blog-empty-title {
    font-family: 'Instrument Serif', serif;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.blog-empty-text {
    font-size: 0.85rem;
    color: var(--text-subtle);
    max-width: 400px;
    margin: 0 auto;
}

/* ===========================================
   Responsive - Page Specific
   =========================================== */

@media (max-width: 1024px) {
    .hero {
        padding: 6rem 2rem 4rem;
    }

    .hero-neural {
        display: none;
    }

    .services,
    .about,
    .contact {
        padding: 6rem 2rem;
    }

    .about {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .page-header {
        padding: 10rem 2rem 4rem;
    }

    .blog-posts {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .hero-cta {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .blog-post-meta {
        flex-direction: row;
        align-items: center;
        gap: 1rem;
    }
}