:root {
    --black: #0a0a0d;
    --black-2: #14141a;
    --white: #ffffff;
    --gray-50: #f6f6f7;
    --gray-100: #ececef;
    --gray-200: #d8d8dc;
    --gray-400: #888892;
    --gray-500: #5a5a64;
    --gray-700: #2a2a32;
    --gray-800: #1c1c22;
    --accent: #ff6b1a;
    --accent-soft: rgba(255, 107, 26, 0.12);
    --grid: rgba(255, 255, 255, 0.04);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--black);
    color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.mono { font-family: 'JetBrains Mono', monospace; }
.accent { color: var(--accent); }

/* ── NAV ── */
#navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    transition: background 0.25s, border-color 0.25s;
    border-bottom: 1px solid transparent;
}

#navbar.on-light {
    background: rgba(255,255,255,0.94);
    border-bottom-color: var(--gray-100);
    backdrop-filter: blur(8px);
}

#navbar.on-light .logo,
#navbar.on-light .nav-links a { color: var(--black); }
#navbar.on-light .logo-mark { color: var(--accent); }

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--white);
}

.logo-mark {
    color: var(--accent);
    font-size: 1rem;
    line-height: 1;
}

.logo-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    opacity: 0.7;
    transition: opacity 0.2s, color 0.2s;
    position: relative;
}

.nav-links a:hover { opacity: 1; color: var(--accent); }

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

.nav-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--white);
}

/* ── HERO ── */
#hero {
    position: relative;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    overflow: hidden;
    background: var(--black);
}

.grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
    mask-image: radial-gradient(circle at 50% 50%, black 30%, transparent 90%);
    -webkit-mask-image: radial-gradient(circle at 50% 50%, black 30%, transparent 90%);
}

.hero-left {
    position: relative;
    z-index: 2;
    padding: 0 60px 0 60px;
    max-width: 640px;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    margin-bottom: 32px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 2px;
    background: rgba(255,255,255,0.02);
    opacity: 0;
    animation: fadeUp 0.6s 0.2s forwards;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.9); }
}

.hero-eyebrow span:last-child {
    font-size: 0.68rem;
    letter-spacing: 2px;
    color: var(--gray-400);
}

.hero-heading {
    font-family: 'Inter', sans-serif;
    font-size: clamp(2rem, 4.2vw, 3.4rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeUp 0.7s 0.4s forwards;
}

.hero-heading .accent {
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.hero-heading .accent::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -2px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    animation: scaleX 0.8s 1.2s forwards;
}

@keyframes scaleX { to { transform: scaleX(1); } }

.hero-tagline {
    font-size: 0.95rem;
    color: var(--gray-400);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 460px;
    opacity: 0;
    animation: fadeUp 0.7s 0.6s forwards;
}

.hero-meta {
    display: flex;
    gap: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0;
    animation: fadeUp 0.7s 0.8s forwards;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.meta-l {
    font-size: 0.65rem;
    color: var(--gray-500);
    letter-spacing: 1px;
}

.meta-v {
    font-size: 0.85rem;
    color: var(--white);
    font-weight: 500;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* T-block canvas + overlay */
.hero-right {
    position: relative;
    z-index: 1;
    height: 100vh;
    min-height: 600px;
}

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

.hero-overlay {
    position: absolute;
    inset: 60px;
    pointer-events: none;
    border: 1px solid rgba(255,255,255,0.06);
}

.cross-tl, .cross-tr, .cross-bl, .cross-br {
    position: absolute;
    width: 16px; height: 16px;
    border-color: var(--accent);
    border-style: solid;
    border-width: 0;
    opacity: 0.8;
}

.cross-tl { top: -1px; left: -1px;  border-top-width: 2px; border-left-width: 2px; }
.cross-tr { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.cross-bl { bottom: -1px; left: -1px;  border-bottom-width: 2px; border-left-width: 2px; }
.cross-br { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

.overlay-tag {
    position: absolute;
    font-size: 0.65rem;
    letter-spacing: 1.5px;
    color: var(--gray-400);
}

.overlay-tag.top-left  { top: 12px; left: 14px; color: var(--accent); }
.overlay-tag.top-right { top: 12px; right: 14px; }
.overlay-tag.bot-left  { bottom: 12px; left: 14px; }
.overlay-tag.bot-right { bottom: 12px; right: 14px; }

/* ── BENTO ── */
#system {
    background: var(--gray-50);
    color: var(--black);
    padding: 80px 40px;
}

.bento-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 2px;
    max-width: 1400px;
    margin: 0 auto;
    background: var(--gray-200);
    border: 1px solid var(--gray-200);
}

.bento-cell {
    background: var(--white);
    padding: 36px;
    position: relative;
    overflow: hidden;
    transition: background 0.25s;
}

.bento-cell:hover { background: var(--gray-50); }

.cell-tag {
    font-size: 0.62rem;
    letter-spacing: 2.5px;
    color: var(--gray-400);
    display: block;
    margin-bottom: 18px;
    text-transform: uppercase;
}

.b-headline {
    grid-column: 1;
    grid-row: 1 / 3;
    background: var(--black);
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 460px;
    padding: 40px;
}

.b-headline:hover { background: var(--black-2); }
.b-headline .cell-tag { color: var(--accent); }

.b-headline h2 {
    font-family: 'Inter', sans-serif;
    font-size: clamp(1.6rem, 2.4vw, 2.2rem);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-top: auto;
}

.cell-foot {
    margin-top: 28px;
    font-size: 0.7rem;
    color: var(--gray-500);
    letter-spacing: 1.5px;
}

.b-flange { grid-column: 2; grid-row: 1; }
.b-joint  { grid-column: 3; grid-row: 1; }
.b-power  { grid-column: 2; grid-row: 2; }
.b-quote  { grid-column: 3; grid-row: 2; background: var(--black); color: var(--white); }
.b-quote:hover { background: var(--black-2); }
.b-quote .cell-tag { color: var(--accent); }
.b-steps  { grid-column: 1 / 4; grid-row: 3; padding: 32px 36px; }

/* mini canvas cells */
.b-flange, .b-joint, .b-power {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0;
}

.mini-canvas {
    width: 100%;
    height: 190px;
    display: block;
    background:
        linear-gradient(rgba(10, 10, 13, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(10, 10, 13, 0.035) 1px, transparent 1px),
        radial-gradient(circle at 50% 42%, #f9f9fb 0%, #e3e3e8 72%);
    background-size: 24px 24px, 24px 24px, auto;
}

.cell-label {
    padding: 22px 28px 28px;
}

.cell-label .cell-tag { margin-bottom: 8px; color: var(--accent); }

.cell-label h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 8px;
    color: var(--black);
    letter-spacing: -0.01em;
}

.cell-label p {
    font-size: 0.82rem;
    color: var(--gray-500);
    line-height: 1.55;
}

.b-quote blockquote {
    font-family: 'Inter', sans-serif;
    font-size: 1.4rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--white);
    letter-spacing: -0.01em;
}

.b-quote blockquote::before {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background: var(--accent);
    margin-bottom: 16px;
}

.b-quote p {
    font-size: 0.82rem;
    color: var(--gray-400);
    line-height: 1.6;
}

/* Steps row */
.step-list {
    list-style: none;
    display: flex;
    gap: 0;
    margin-top: 6px;
}

.step-list li {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 4px 28px 4px 0;
    border-right: 1px solid var(--gray-200);
    margin-right: 28px;
}

.step-list li:last-child {
    border-right: none;
    margin-right: 0;
}

.step-list .sn {
    font-size: 0.65rem;
    color: var(--accent);
    letter-spacing: 2px;
    font-weight: 700;
}

.step-list span:last-child {
    font-size: 0.85rem;
    color: var(--gray-700);
    line-height: 1.5;
    font-weight: 500;
}

/* ── CONTACT ── */
#contact {
    background: var(--black);
    padding: 100px 40px;
    border-top: 1px solid rgba(255,255,255,0.08);
    position: relative;
    overflow: hidden;
}

#contact::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(circle at 30% 50%, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at 30% 50%, black 0%, transparent 70%);
}

.contact-wrap {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 80px;
    align-items: start;
    position: relative;
    z-index: 1;
}

.contact-left .cell-tag { color: var(--accent); }

.contact-left h2 {
    font-family: 'Inter', sans-serif;
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 36px;
}

.contact-meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-meta span {
    font-size: 0.85rem;
    color: var(--gray-400);
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-top: 32px;
}

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

.contact-form input,
.contact-form textarea {
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    color: var(--white);
    font-family: 'Inter', sans-serif;
    font-size: 0.92rem;
    padding: 14px 0;
    outline: none;
    transition: border-color 0.2s;
    width: 100%;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--gray-500); }

.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--accent); }

.contact-form textarea { resize: none; }

.send-btn {
    align-self: flex-start;
    background: var(--accent);
    color: var(--white);
    border: none;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 14px 28px;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 12px;
}

.send-btn:hover { background: #ff8842; }

/* ── FOOTER ── */
footer {
    background: var(--black);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 24px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--white);
}

footer span:last-child {
    font-size: 0.68rem;
    color: var(--gray-500);
    letter-spacing: 1.5px;
}

/* ── MOBILE ── */
@media (max-width: 900px) {
    #navbar { padding: 16px 20px; }

    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        inset: 0;
        background: var(--black);
        align-items: center;
        justify-content: center;
        gap: 32px;
        z-index: 99;
    }
    .nav-links.open a { font-size: 1.2rem; opacity: 1; }
    .nav-toggle { display: flex; z-index: 101; }

    #hero {
        grid-template-columns: 1fr;
        padding-top: 100px;
    }

    .hero-left { padding: 0 24px; max-width: 100%; }

    .hero-right {
        height: 60vh;
        min-height: 380px;
    }

    .hero-overlay { inset: 24px; }
    .hero-meta { flex-wrap: wrap; gap: 20px; }

    #system { padding: 48px 16px; }
    .bento-grid { grid-template-columns: 1fr; }
    .b-headline, .b-flange, .b-joint, .b-power, .b-quote, .b-steps {
        grid-column: 1; grid-row: auto;
    }
    .b-headline { min-height: 280px; }

    .step-list { flex-direction: column; gap: 20px; }
    .step-list li {
        border-right: none;
        border-bottom: 1px solid var(--gray-200);
        padding: 0 0 20px 0;
        margin-right: 0;
    }
    .step-list li:last-child { border-bottom: none; padding-bottom: 0; }

    #contact { padding: 70px 24px; }
    .contact-wrap { grid-template-columns: 1fr; gap: 36px; }
    .field-row { grid-template-columns: 1fr; }

    footer { flex-direction: column; gap: 10px; padding: 20px; text-align: center; }
}