/* ===== DESIGN SYSTEM ===== */
:root {
    --bg: #0d0d0d;
    --bg-card: #141414;
    --bg-elevated: #1a1a1a;
    --text: #ffffff;
    --text-muted: #888888;
    --text-dim: #555555;
    --accent: #ff5500;
    --border: #2a2a2a;
    --border-light: #333333;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

/* ===== GRID LINES ===== */
.grid-lines {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}
.grid-lines span {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
}
.grid-lines span:nth-child(1) { left: 5%; }
.grid-lines span:nth-child(2) { left: 50%; }
.grid-lines span:nth-child(3) { right: 5%; }

/* ===== LAYOUT ===== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
    position: relative;
    z-index: 2;
}

/* ===== NAVBAR ===== */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: 72px;
    background: rgba(13, 13, 13, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
}
.nav-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-body);
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 1px;
}
.logo-bar {
    width: 3px;
    height: 22px;
    background: var(--accent);
    display: inline-block;
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}
.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.3s var(--ease);
    position: relative;
    padding-bottom: 4px;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
}
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--accent);
}
.nav-cta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-decoration: none;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 10px 24px;
    transition: all 0.3s var(--ease);
}
.nav-cta:hover {
    background: var(--accent);
    color: var(--bg);
}

/* Mobile toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: 0.3s;
}

/* ===== CORNER MARKER ===== */
.corner-marker {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent);
}
.corner-tl { top: 0; left: 0; }
.corner-tr { top: 0; right: 0; }

/* ===== BRACKET CORNERS ===== */
.bracket-corners {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.bracket-corners::before,
.bracket-corners::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
}
.bracket-corners::before {
    top: -1px;
    left: -1px;
    border-top: 1px dashed var(--accent);
    border-left: 1px dashed var(--accent);
}
.bracket-corners::after {
    bottom: -1px;
    right: -1px;
    border-bottom: 1px dashed var(--accent);
    border-right: 1px dashed var(--accent);
}

/* ===== TAGS ===== */
.tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 1px;
    padding: 5px 12px;
    border: 1px solid var(--border-light);
    color: var(--text-muted);
    text-transform: uppercase;
}
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

/* ===== SECTION TAG ===== */
.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 2px;
    padding: 6px 14px;
    border: 1px solid var(--border-light);
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* ===== CARD LABEL ===== */
.card-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
}

/* ===== BUTTONS ===== */
.btn-primary {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 14px 32px;
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
    border: 1px solid var(--accent);
    cursor: pointer;
    transition: all 0.3s var(--ease);
}
.btn-primary:hover {
    background: #ff7733;
    transform: translateY(-2px);
}
.btn-outline {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    padding: 14px 32px;
    background: transparent;
    color: var(--text);
    text-decoration: none;
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all 0.3s var(--ease);
}
.btn-outline:hover {
    border-color: var(--text);
    background: rgba(255,255,255,0.05);
}

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 72px;
    overflow: hidden;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 60px;
    align-items: center;
    padding-top: 80px;
    padding-bottom: 80px;
}
.hero-left { position: relative; }
.hero-icons {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.icon-lambda {
    font-size: 1.8rem;
    color: var(--accent);
    font-weight: 300;
}
.icon-bars {
    display: inline-flex;
    align-items: flex-end;
    gap: 3px;
    height: 24px;
}
.icon-bars i {
    display: block;
    width: 5px;
    background: var(--accent);
    border-radius: 1px;
}
.icon-bars i:nth-child(1) { height: 10px; }
.icon-bars i:nth-child(2) { height: 18px; }
.icon-bars i:nth-child(3) { height: 14px; }

.hero h1 {
    font-size: clamp(2.8rem, 5.5vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -2px;
    margin-bottom: 20px;
}
.hero-sub {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 560px;
    margin-bottom: 36px;
    line-height: 1.7;
}
.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero right — status cards */
.hero-right {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.status-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 28px 24px;
}
.card-value {
    display: block;
    font-family: var(--font-body);
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 1px;
}
.status-bar {
    margin-top: 16px;
    height: 3px;
    background: var(--border);
    position: relative;
}
.status-bar::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 70%;
    background: var(--accent);
}
.metric-number {
    display: block;
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1;
    margin: 8px 0;
}
.metric-unit {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 1px;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* ===== SECTIONS ===== */
.section-dark {
    position: relative;
    padding: 120px 0;
    border-top: 1px solid var(--border);
}
.section-header {
    margin-bottom: 60px;
}
.section-heading {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 16px;
}
.section-sub {
    color: var(--text-muted);
    max-width: 560px;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== TIMELINE (Systems) ===== */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    padding-left: 40px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
}
.timeline-item {
    position: relative;
    padding-bottom: 48px;
}
.tl-marker {
    position: absolute;
    left: -40px;
    top: 6px;
    width: 15px;
    height: 15px;
    border: 2px solid var(--accent);
    background: var(--bg);
    z-index: 2;
}
.tl-marker::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 5px;
    height: 5px;
    background: var(--accent);
}
.tl-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 28px 32px;
}
.tl-date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--accent);
    display: block;
    margin-bottom: 12px;
}
.tl-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}
.tl-role {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 12px;
}
.tl-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== STRATEGY ===== */
.strategy-grid {
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    gap: 60px;
    padding-top: 40px;
}
.strategy-divider {
    width: 1px;
    background: var(--border);
}
.strategy-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1;
    margin-bottom: 4px;
}
.strategy-accent {
    display: block;
    font-family: var(--font-body);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 32px;
}
.strategy-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 28px 28px 20px;
    margin-bottom: 32px;
}
.strategy-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}
.stat-row {
    display: flex;
    align-items: center;
    gap: 16px;
}
.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent);
    letter-spacing: -1px;
    line-height: 1;
}
.stat-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 2px;
    color: var(--text-muted);
    line-height: 1.4;
    text-transform: uppercase;
}

/* Alignment index bar */
.alignment-index {
    margin-top: 32px;
}
.index-bar {
    margin-top: 12px;
    height: 6px;
    background: var(--border);
    display: flex;
    gap: 2px;
    overflow: hidden;
}
.index-fill {
    height: 100%;
    transition: width 1.5s var(--ease);
}
.index-fill.orange { width: 65%; background: var(--accent); }
.index-fill.green { width: 25%; background: #22c55e; }

/* ===== PORTFOLIO ===== */
.portfolio-heading {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 16px;
}
.filter-divider {
    height: 1px;
    background: var(--border);
    margin: 32px 0;
}
.filter-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}
.filter-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--text-muted);
}
.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 10px 24px;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all 0.3s var(--ease);
}
.filter-btn:hover {
    border-color: var(--text);
}
.filter-btn.active {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: transform 0.4s var(--ease), border-color 0.3s;
    position: relative;
}
.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-light);
}
.project-card.hidden {
    display: none;
}
.project-img {
    position: relative;
    height: 200px;
    overflow: hidden;
}
.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(60%) brightness(0.7);
    transition: filter 0.4s;
}
.project-card:hover .project-img img {
    filter: grayscale(20%) brightness(0.9);
}
.project-tag-img {
    position: absolute;
    top: 12px;
    left: 12px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 2px;
    padding: 4px 10px;
    background: rgba(13,13,13,0.85);
    border: 1px solid var(--border-light);
    color: var(--text);
}
.project-body {
    padding: 24px;
}
.project-category {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 10px;
    text-transform: uppercase;
}
.project-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.3;
}
.project-body p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.project-border-bottom {
    height: 2px;
    background: transparent;
    border-top: 2px dashed var(--accent);
    margin: 0 24px;
    opacity: 0.5;
}

/* ===== PHILOSOPHY ===== */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.philosophy-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 28px 24px;
    transition: transform 0.3s var(--ease);
}
.philosophy-card:hover {
    transform: translateY(-4px);
}
.philosophy-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.3;
}
.philosophy-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== CONTACT ===== */
.contact-headline {
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 300;
    font-style: italic;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 16px;
}
.contact-divider {
    height: 1px;
    background: var(--border);
    margin: 40px 0;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 80px;
}
.contact-left {
    padding-top: 16px;
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-top: 32px;
}
.contact-icon {
    font-size: 1.2rem;
    color: var(--accent);
    margin-top: 2px;
}
.contact-item-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text);
    margin-bottom: 4px;
}
.contact-item a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}
.contact-item a:hover { color: var(--text); }

/* Form */
.form-group { margin-bottom: 28px; }
.form-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text);
    margin-bottom: 12px;
    text-transform: uppercase;
}
input, textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color 0.3s;
    outline: none;
}
input:focus, textarea:focus {
    border-color: var(--accent);
}
input::placeholder, textarea::placeholder {
    color: var(--text-dim);
}
textarea {
    height: 120px;
    resize: none;
}
.form-submit {
    display: flex;
    justify-content: flex-end;
    margin-top: 8px;
}

/* ===== FOOTER ===== */
#footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.footer-links {
    display: flex;
    gap: 32px;
}
.footer-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-links a:hover { color: var(--text-muted); }
.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 1px;
    color: var(--text-dim);
}

/* ===== SCROLL REVEAL ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero-right { flex-direction: row; }
    .strategy-grid { grid-template-columns: 1fr; gap: 40px; }
    .strategy-divider { display: none; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .philosophy-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(13,13,13,0.98);
        padding: 24px 5%;
        gap: 20px;
        border-bottom: 1px solid var(--border);
    }
    .mobile-toggle { display: flex; }
    .hero-grid { padding-top: 40px; }
    .hero h1 { font-size: 2.5rem; letter-spacing: -1px; }
    .hero-right { flex-direction: column; }
    .projects-grid { grid-template-columns: 1fr; }
    .philosophy-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-container { flex-direction: column; gap: 20px; text-align: center; }
    .section-dark { padding: 80px 0; }
    .strategy-title { font-size: 3rem; }
}