/* ==========================================================================
   VIRAGAR — Stylesheet
   Sections:
   1.  Reset & base
   2.  Design tokens (theme variables)
   3.  Typography
   4.  Layout utilities
   5.  Buttons
   6.  Header & navigation
   7.  Hero
   8.  About statement
   9.  Problem
   10. Solution pipeline
   11. Capabilities
   12. Data-to-knowledge synthesis visual
   13. Process chain
   14. AI interaction
   15. Technology
   16. Applications
   17. Value proposition
   18. Future vision
   19. Final CTA
   20. Contact form
   21. Footer
   22. Reveal animation & reduced motion
   23. Responsive
   ========================================================================== */

/* -------------------------------------------------------------------------
   1. Reset & base
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
input, textarea { font: inherit; color: inherit; }
svg { display: block; }

/* -------------------------------------------------------------------------
   2. Design tokens
   ------------------------------------------------------------------------- */
:root {
    /* Dark (default) — industrial blueprint palette */
    --bg:            #0A0E14;
    --bg-elevated:   #10151D;
    --bg-panel:      #131A24;
    --bg-panel-2:    #161E29;
    --border:        #212A38;
    --border-strong: #34415A;
    --grid-line:     rgba(120, 150, 190, 0.06);

    --text-primary:   #E9EDF3;
    --text-secondary: #9AA7B8;
    --text-tertiary:  #626E80;

    --accent:        #4E8FCB;
    --accent-strong: #7FB4E4;
    --accent-dim:    rgba(78, 143, 203, 0.14);
    --accent-ink:    #06121C;

    --amber:         #D99A4E;
    --amber-dim:     rgba(217, 154, 78, 0.16);

    --danger:        #C4644F;

    --shadow-panel: 0 1px 0 rgba(255,255,255,0.02) inset;

    --font-fa: 'Vazirmatn', 'Tahoma', sans-serif;
    --font-en-heading: 'Space Grotesk', 'Arial', sans-serif;
    --font-en-body: 'IBM Plex Sans', 'Arial', sans-serif;
    --font-mono: 'IBM Plex Mono', 'Consolas', monospace;

    --container-w: 1180px;
    --radius-sm: 3px;

    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
    --bg:            #F2F4F7;
    --bg-elevated:   #FFFFFF;
    --bg-panel:      #FFFFFF;
    --bg-panel-2:    #EAEEF3;
    --border:        #D9DFE7;
    --border-strong: #B9C3D0;
    --grid-line:     rgba(46, 74, 110, 0.06);

    --text-primary:   #121826;
    --text-secondary: #4B5768;
    --text-tertiary:  #7A8494;

    --accent:        #2E6DA4;
    --accent-strong: #1F5A8C;
    --accent-dim:    rgba(46, 109, 164, 0.10);
    --accent-ink:    #FFFFFF;

    --amber:         #B97328;
    --amber-dim:     rgba(185, 115, 40, 0.12);

    --danger:        #A8412D;

    --shadow-panel: 0 1px 2px rgba(20, 30, 50, 0.06);
}

/* -------------------------------------------------------------------------
   3. Typography
   ------------------------------------------------------------------------- */
body {
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-en-body);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s var(--ease), color 0.3s var(--ease);
    overflow-x: hidden;
}

body[data-lang="fa"] { font-family: var(--font-fa); }
body[data-lang="fa"] h1, body[data-lang="fa"] h2, body[data-lang="fa"] h3,
body[data-lang="fa"] .brand-word, body[data-lang="fa"] .btn { font-family: var(--font-fa); }

body[data-lang="en"] h1, body[data-lang="en"] h2, body[data-lang="en"] h3 {
    font-family: var(--font-en-heading);
    letter-spacing: -0.01em;
}

h1, h2, h3 { font-weight: 700; line-height: 1.28; color: var(--text-primary); }
h1 { font-size: clamp(2.1rem, 4.4vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.15rem); }
h3 { font-size: 1.08rem; font-weight: 600; }

p { color: var(--text-secondary); }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.55em;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-strong);
    margin-block-end: 0.9rem;
}
.eyebrow::before {
    content: "";
    width: 22px;
    height: 1px;
    background: var(--accent-strong);
    display: inline-block;
}

.section-sub {
    max-width: 640px;
    margin-block-start: 0.9rem;
    font-size: 1.02rem;
}

/* -------------------------------------------------------------------------
   4. Layout utilities
   ------------------------------------------------------------------------- */
.container {
    max-width: var(--container-w);
    margin-inline: auto;
    padding-inline: 24px;
}

section { padding-block: clamp(64px, 9vw, 112px); position: relative; }

.section-head { max-width: 720px; margin-block-end: 48px; }

.skip-link {
    position: absolute;
    inset-inline-start: -999px;
    top: 0;
    background: var(--accent);
    color: var(--accent-ink);
    padding: 10px 18px;
    z-index: 999;
}
.skip-link:focus { inset-inline-start: 12px; top: 12px; }

:focus-visible {
    outline: 2px solid var(--accent-strong);
    outline-offset: 2px;
}

/* -------------------------------------------------------------------------
   5. Buttons
   ------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5em;
    padding: 14px 26px;
    font-size: 0.96rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease), color 0.2s var(--ease);
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #FFFFFF; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; color: var(--text-primary); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--accent-strong); color: var(--accent-strong); }
.btn-ghost-invert { border-color: rgba(255,255,255,0.35); color: #fff; }
.btn-ghost-invert:hover { border-color: #fff; color: #fff; }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* -------------------------------------------------------------------------
   6. Header & navigation
   ------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.is-scrolled {
    border-bottom-color: var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 76px;
}

.brand-logo { height: 34px; width: auto; }

.main-nav ul { display: flex; align-items: center; gap: 30px; }
.main-nav a {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding-block: 6px;
    transition: color 0.2s var(--ease);
}
.main-nav a:hover { color: var(--text-primary); }
.main-nav a::after {
    content: "";
    position: absolute;
    inset-inline-start: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--accent-strong);
    transition: width 0.25s var(--ease);
}
.main-nav a:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 18px; }

.lang-switch { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; font-family: var(--font-mono); }
.lang-btn { color: var(--text-tertiary); font-weight: 500; padding: 4px 2px; }
.lang-btn.is-active { color: var(--accent-strong); }
.lang-sep { color: var(--border-strong); }

.theme-toggle {
    width: 34px; height: 34px;
    display: grid; place-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}
.theme-toggle:hover { color: var(--accent-strong); border-color: var(--border-strong); }
.theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.hamburger {
    display: none;
    width: 34px; height: 34px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.hamburger span {
    width: 20px; height: 1.6px;
    background: var(--text-primary);
    transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

.mobile-nav {
    display: none;
    flex-direction: column;
    gap: 22px;
    padding: 28px 24px 32px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.mobile-nav ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a { display: block; padding: 10px 0; font-size: 1.02rem; font-weight: 500; border-bottom: 1px solid var(--border); }
.mobile-nav.is-open { display: flex; }

/* -------------------------------------------------------------------------
   7. Hero
   ------------------------------------------------------------------------- */
.hero { padding-block-start: clamp(56px, 8vw, 96px); overflow: hidden; }

.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 85%);
    pointer-events: none;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: center;
    position: relative;
}

.hero-title { margin-block-end: 22px; }
.hero-subtitle { font-size: 1.08rem; max-width: 540px; margin-block-end: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-visual { display: flex; justify-content: center; }
.flow-diagram { width: 100%; max-width: 400px; overflow: visible; }

.flow-line { stroke: var(--border-strong); stroke-width: 1.4; }
.flow-arrowhead { fill: var(--border-strong); }

.flow-node rect {
    fill: var(--bg-panel);
    stroke: var(--border-strong);
    stroke-width: 1.2;
}
.flow-node text {
    font-family: var(--font-mono);
    font-size: 13px;
    fill: var(--text-secondary);
    text-anchor: middle;
    dominant-baseline: middle;
}
.flow-node-accent rect { stroke: var(--accent); fill: var(--accent-dim); }
.flow-node-accent text { fill: var(--accent-strong); }
.flow-node-final rect { fill: var(--accent); stroke: var(--accent); }
.flow-node-final text { fill: #fff; font-weight: 600; }

.flow-node-accent rect { animation: flowAccentPulse 2.6s ease-in-out infinite; }

.flow-particle { fill: var(--accent-strong); opacity: 0; animation: dtParticle 2.2s ease-in-out infinite; }

@keyframes flowAccentPulse {
    0%, 100% { stroke-opacity: 1; }
    50% { stroke-opacity: 0.45; }
}

/* -------------------------------------------------------------------------
   8. About statement
   ------------------------------------------------------------------------- */
.about { padding-block: clamp(48px, 7vw, 80px); border-block: 1px solid var(--border); }
.statement {
    font-size: clamp(1.3rem, 2.6vw, 1.9rem);
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.55;
    max-width: 900px;
}
.statement span { color: var(--text-primary); font-weight: 700; }

/* -------------------------------------------------------------------------
   9. Problem
   ------------------------------------------------------------------------- */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}
.problem-card { background: var(--bg); padding: 30px 28px; }
.problem-card h3 { margin-block-end: 10px; font-size: 1rem; }
.problem-card p { font-size: 0.93rem; }

/* -------------------------------------------------------------------------
   10. Solution pipeline
   ------------------------------------------------------------------------- */
.pipeline { display: flex; flex-direction: column; }
.pipeline-step {
    display: flex;
    gap: 26px;
    align-items: flex-start;
    padding-block: 22px;
    border-block-end: 1px solid var(--border);
}
.pipeline-step:first-child { border-block-start: 1px solid var(--border); }
.pipeline-index {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-strong);
    padding-block-start: 3px;
    flex: none;
    width: 2.4em;
}
.pipeline-body h3 { margin-block-end: 5px; }
.pipeline-body p { font-size: 0.93rem; max-width: 560px; }

/* -------------------------------------------------------------------------
   11. Capabilities
   ------------------------------------------------------------------------- */
.cap-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.cap-card {
    position: relative;
    padding: 26px 22px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
}
.cap-card::before, .cap-card::after {
    content: "";
    position: absolute;
    width: 10px; height: 10px;
    border-color: var(--border-strong);
    transition: border-color 0.2s var(--ease);
}
.cap-card::before { top: -1px; inset-inline-start: -1px; border-block-start: 1.5px solid; border-inline-start: 1.5px solid; }
.cap-card::after { bottom: -1px; inset-inline-end: -1px; border-block-end: 1.5px solid; border-inline-end: 1.5px solid; }
.cap-card:hover::before, .cap-card:hover::after { border-color: var(--accent-strong); }

.cap-icon {
    width: 28px; height: 28px;
    fill: none; stroke: var(--accent-strong);
    stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round;
    margin-block-end: 16px;
}
.cap-card h3 { margin-block-end: 8px; font-size: 0.98rem; }
.cap-card p { font-size: 0.88rem; }

/* -------------------------------------------------------------------------
   12. Data-to-knowledge synthesis visual
   ------------------------------------------------------------------------- */
.synthesis { background: var(--bg-elevated); border-block: 1px solid var(--border); }
.dt-inner {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
    align-items: center;
}
.dt-copy p { margin-block-end: 16px; }
.dt-highlight {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.02rem;
    padding-inline-start: 16px;
    border-inline-start: 2px solid var(--accent);
}

.dt-legend { display: flex; flex-wrap: wrap; gap: 18px; margin-block-start: 26px; }
.dt-legend li { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-secondary); font-family: var(--font-mono); }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot-a { background: var(--text-tertiary); }
.dot-b { background: var(--accent-strong); }
.dot-c { background: var(--amber); }

.dt-visual svg { width: 100%; height: auto; overflow: visible; max-width: 380px; margin-inline: auto; display: block; }

/* Stage 1 — scattered documents: gentle independent floating */
.dt-doc rect { fill: var(--bg-panel); stroke: var(--border-strong); stroke-width: 1.3; }
.dt-doc line { stroke: var(--border-strong); stroke-width: 1.3; }
.dt-doc-1 { animation: dtFloat 4.2s ease-in-out infinite; transform-origin: 179px 103px; }
.dt-doc-2 { animation: dtFloat 4.8s ease-in-out infinite 0.4s; transform-origin: 214px 85px; }
.dt-doc-3 { animation: dtFloat 4.5s ease-in-out infinite 0.8s; transform-origin: 249px 103px; }

/* Connectors carrying a continuous flow of particles */
.dt-connector { stroke: var(--border-strong); stroke-width: 1.4; stroke-dasharray: 4 5; }
.dt-particle { fill: var(--accent-strong); opacity: 0; animation: dtParticle 2.6s ease-in-out infinite; }

/* Stage 2 — intelligent processing core */
.dt-core-ring {
    fill: none;
    stroke: var(--accent);
    stroke-width: 1.4;
    stroke-dasharray: 5 6;
    animation: dtRotate 16s linear infinite;
}
.dt-core-fill {
    fill: var(--accent-dim);
    stroke: var(--accent-strong);
    stroke-width: 1.4;
    animation: dtPulse 3.2s ease-in-out infinite;
}
.dt-orbit { transform-origin: 210px 300px; }
.dt-orbit-1 { animation: dtRotate 6s linear infinite; }
.dt-orbit-2 { animation: dtRotateReverse 8.5s linear infinite; }
.dt-orbit-3 { animation: dtRotate 11s linear infinite; }
.dt-dot { r: 4; fill: var(--amber); }
.dt-orbit-2 .dt-dot { fill: var(--accent-strong); r: 3.4; }
.dt-orbit-3 .dt-dot { fill: var(--text-tertiary); r: 3; }

/* Stage 3 — structured, ready-to-use knowledge */
.dt-bar {
    fill: var(--accent-dim);
    stroke: var(--accent-strong);
    stroke-width: 1.2;
    transform-origin: 140px center;
    transition: transform 0.6s var(--ease), opacity 0.6s var(--ease);
    transition-delay: calc(var(--i) * 110ms);
    transform: scaleX(0);
    opacity: 0;
}
.dt-visual.reveal.is-visible .dt-bar { transform: scaleX(1); opacity: 1; }
[dir="rtl"] .dt-bar { transform-origin: 280px center; }

@keyframes dtFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-7px); }
}
@keyframes dtRotate { to { transform: rotate(360deg); } }
@keyframes dtRotateReverse { to { transform: rotate(-360deg); } }
@keyframes dtPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.06); opacity: 0.85; }
}
@keyframes dtParticle {
    0% { transform: translateY(0); opacity: 0; }
    12% { opacity: 1; }
    88% { opacity: 1; }
    100% { transform: translateY(var(--dist)); opacity: 0; }
}

/* -------------------------------------------------------------------------
   13. Process chain
   ------------------------------------------------------------------------- */
.process-chain {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
}
.process-node {
    padding: 16px 22px;
    background: var(--bg-panel);
    border: 1px solid var(--border-strong);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 500;
    white-space: nowrap;
}
.process-node-final { background: var(--accent); color: #fff; border-color: var(--accent); }
.process-arrow {
    width: 34px; height: 1px;
    background: var(--border-strong);
    position: relative;
    flex: none;
}
.process-arrow::after {
    content: "";
    position: absolute;
    inset-inline-end: -1px;
    top: 50%;
    width: 6px; height: 6px;
    border-inline-end: 1.4px solid var(--border-strong);
    border-block-end: 1.4px solid var(--border-strong);
    transform: translateY(-50%) rotate(-45deg);
}
[dir="rtl"] .process-arrow::after { transform: translateY(-50%) rotate(135deg); inset-inline-end: -1px; }

/* -------------------------------------------------------------------------
   14. AI interaction
   ------------------------------------------------------------------------- */
.ai-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.ai-inner .section-head { margin-inline: auto; text-align: center; }
.ai-inner .eyebrow::before { display: none; }

.chat-mock { width: 100%; max-width: 620px; }
.chat-window {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    text-align: start;
}
.chat-window-bar { display: flex; gap: 6px; padding: 12px 16px; border-block-end: 1px solid var(--border); }
.chat-window-bar span { width: 8px; height: 8px; border-radius: 50%; background: var(--border-strong); }
.chat-body { padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.chat-msg { max-width: 85%; padding: 13px 16px; border-radius: 4px; font-size: 0.92rem; }
.chat-msg p { color: inherit; }
.chat-msg-user { align-self: flex-end; background: var(--accent); color: #fff; }
[dir="rtl"] .chat-msg-user { align-self: flex-start; }
.chat-msg-ai {
    align-self: flex-start;
    background: var(--bg-panel-2);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.86rem;
    border: 1px solid var(--border);
}
[dir="rtl"] .chat-msg-ai { align-self: flex-end; }
.ai-demo-note { margin-block-start: 16px; font-size: 0.8rem; color: var(--text-tertiary); text-align: center; }

/* -------------------------------------------------------------------------
   15. Technology
   ------------------------------------------------------------------------- */
.tech-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.tech-chip {
    padding: 11px 20px;
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    font-size: 0.88rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

/* -------------------------------------------------------------------------
   16. Applications
   ------------------------------------------------------------------------- */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.app-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 22px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
}
.app-icon { width: 24px; height: 24px; fill: none; stroke: var(--accent-strong); stroke-width: 1.4; flex: none; }
.app-card span { font-weight: 500; font-size: 0.95rem; }

/* -------------------------------------------------------------------------
   17. Value proposition
   ------------------------------------------------------------------------- */
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 40px; }
.value-item { display: flex; align-items: flex-start; gap: 14px; padding-block: 12px; border-block-end: 1px solid var(--border); }
.value-check { width: 18px; height: 18px; flex: none; margin-block-start: 2px; fill: none; stroke: var(--accent-strong); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.value-item span { font-size: 0.98rem; color: var(--text-primary); }

/* -------------------------------------------------------------------------
   18. Future vision
   ------------------------------------------------------------------------- */
.future-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.future-card { padding: 24px 22px; border: 1px solid var(--border); background: var(--bg-panel); }
.future-card h3 { margin-block-end: 8px; font-size: 0.98rem; color: var(--accent-strong); }
.future-card p { font-size: 0.88rem; }

/* -------------------------------------------------------------------------
   19. Final CTA
   ------------------------------------------------------------------------- */
.final-cta { background: var(--accent); }
.final-cta-inner { text-align: center; max-width: 720px; margin-inline: auto; }
.final-cta h2 { color: #fff; margin-block-end: 30px; }
.final-cta .btn-primary { background: #fff; color: var(--accent); }
.final-cta .btn-primary:hover { background: #E9F1FA; }

/* -------------------------------------------------------------------------
   20. Contact
   ------------------------------------------------------------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    padding: 32px;
}
.contact-company { font-size: 1.05rem; margin-block-end: 22px; color: var(--accent-strong); }

.contact-details { display: flex; flex-direction: column; gap: 16px; margin-block-end: 26px; }
.contact-details li { display: flex; flex-direction: column; gap: 4px; }
.contact-detail-label { font-size: 0.78rem; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.04em; }
.contact-detail-value { font-size: 0.95rem; color: var(--text-primary); }
.contact-link { transition: color 0.2s var(--ease); }
.contact-link:hover { color: var(--accent-strong); }

.contact-map {
    border: 1px solid var(--border);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    margin-block-end: 12px;
}
.contact-map iframe { width: 100%; height: 100%; border: 0; filter: grayscale(0.15) contrast(1.02); }
[data-theme="dark"] .contact-map iframe,
:root:not([data-theme]) .contact-map iframe { filter: grayscale(0.35) invert(0.92) contrast(0.9) brightness(0.95); }

.contact-map-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.86rem;
    font-weight: 500;
    color: var(--accent-strong);
}
.contact-map-link:hover { text-decoration: underline; }

/* Honeypot field — kept in the tab order out of the way, invisible to people */
.contact-honeypot {
    position: absolute;
    inset-inline-start: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.contact-form-wrap { position: relative; }
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field label { font-size: 0.86rem; font-weight: 500; color: var(--text-secondary); }
.form-field input, .form-field textarea {
    background: var(--bg-panel);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 0.95rem;
    resize: vertical;
    transition: border-color 0.2s var(--ease);
}
.form-field input:focus, .form-field textarea:focus { border-color: var(--accent-strong); }

.form-banner {
    padding: 14px 16px;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    text-align: center;
    margin-block-end: 18px;
}
.form-banner-success { color: var(--accent-strong); background: var(--accent-dim); }
.form-banner-error { color: var(--danger); background: rgba(196, 100, 79, 0.12); }

/* -------------------------------------------------------------------------
   21. Footer
   ------------------------------------------------------------------------- */
.site-footer { border-block-start: 1px solid var(--border); padding-block-start: 64px; }
.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 0.9fr 1fr 0.8fr;
    gap: 40px;
    padding-block-end: 44px;
}
.footer-logo { height: 28px; margin-block-end: 14px; }
.footer-brand p { font-size: 0.88rem; max-width: 280px; }
.footer-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-tertiary); margin-block-end: 16px; font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.92rem; color: var(--text-secondary); }
.footer-col a:hover { color: var(--accent-strong); }
.footer-contact li a { font-family: var(--font-mono); font-size: 0.86rem; }
.footer-bottom { border-block-start: 1px solid var(--border); padding-block: 22px; }
.footer-bottom p { font-size: 0.82rem; color: var(--text-tertiary); }

/* -------------------------------------------------------------------------
   22. Reveal animation & reduced motion
   ------------------------------------------------------------------------- */
/* Hidden-until-revealed states only apply once JS confirms it can run the
   IntersectionObserver (html.js, added by an inline script in <head>). This
   guarantees full content is visible by default with JS disabled or slow. */
.js .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }

.js .flow-node { opacity: 0; transform: translateY(8px); transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }
.js .flow-node.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal, .flow-node {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    .dt-bar { transform: none !important; opacity: 1 !important; }
    * { animation-duration: 0.001ms !important; }
}

/* -------------------------------------------------------------------------
   23. Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 1080px) {
    .cap-grid { grid-template-columns: repeat(2, 1fr); }
    .app-grid { grid-template-columns: repeat(2, 1fr); }
    .future-grid { grid-template-columns: repeat(2, 1fr); }
    .problem-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 920px) {
    .main-nav { display: none; }
    .hamburger { display: flex; }
    .header-cta { display: none; }

    .hero-inner { grid-template-columns: 1fr; }
    .hero-visual { order: -1; margin-block-end: 12px; }
    .flow-diagram { max-width: 320px; }

    .dt-inner { grid-template-columns: 1fr; gap: 40px; }
    .dt-visual { order: -1; }
    .contact-grid { grid-template-columns: 1fr; }

    .footer-inner { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
    section { padding-block: 56px; }
    .cap-grid, .app-grid, .future-grid, .problem-grid { grid-template-columns: 1fr; }
    .value-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .process-chain { flex-direction: column; align-items: stretch; }
    .process-arrow { width: 1px; height: 22px; margin-inline: auto; }
    .process-arrow::after { inset-inline-end: -3px; top: auto; bottom: -1px; transform: rotate(45deg); }
    [dir="rtl"] .process-arrow::after { transform: rotate(-135deg); }
    .process-node { text-align: center; width: 100%; }
    .hero-actions .btn, .final-cta-inner .btn { width: 100%; }
    .hero-actions, .final-cta-inner .hero-actions { flex-direction: column; }
}