/* ════════════════════════════════════════════════════════
   ABTRIS — Design System
   Brand: Abtris Green #2DB800
   Style: Dark minimalism + glassmorphism + motion
   Fonts: Space Grotesk (headings) + DM Sans (body)
   ════════════════════════════════════════════════════════ */

/* ─── Layer Order ─── */
@layer reset, tokens, base, components, utilities;

/* ─── Reset ─── */
@layer reset {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
  img, svg { display: block; max-width: 100%; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; cursor: pointer; border: none; background: none; }
  ul, ol { list-style: none; }
}

/* ─── Design Tokens ─── */
@layer tokens {
  :root {
    /* Brand Palette — derived from Abtris logo green #2DB800 */
    --green-50:  #E8FFDE;
    --green-100: #CCFFB3;
    --green-200: #8AEF62;
    --green-300: #52D92A;
    --green-400: #2DB800;
    --green-500: #249400;
    --green-600: #1C7200;

    /* Accent — purple for secondary emphasis */
    --purple-400: #8B5CF6;
    --purple-500: #7C3AED;

    /* Amber — for warnings and warm accents */
    --amber-400: #FBBF24;
    --amber-500: #F59E0B;

    /* Danger */
    --red-400: #F87171;
    --red-500: #EF4444;

    /* Neutrals — cool slate for dark mode */
    --slate-950: #020617;
    --slate-900: #0F172A;
    --slate-800: #1E293B;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748B;
    --slate-400: #94A3B8;
    --slate-300: #CBD5E1;
    --slate-200: #E2E8F0;
    --slate-100: #F1F5F9;
    --slate-50:  #F8FAFC;

    /* Semantic tokens */
    --color-bg:        var(--slate-950);
    --color-surface:   rgba(15, 23, 42, 0.6);
    --color-surface-2: rgba(30, 41, 59, 0.5);
    --color-text:      var(--slate-100);
    --color-muted:     var(--slate-400);
    --color-border:    rgba(148, 163, 184, 0.12);
    --color-border-hover: rgba(148, 163, 184, 0.22);
    --color-accent:    var(--green-400);
    --color-accent-glow: rgba(45, 184, 0, 0.25);
    --color-accent-subtle: rgba(45, 184, 0, 0.08);

    /* Typography */
    --font-heading: 'Poppins', system-ui, -apple-system, sans-serif;
    --font-body:    'Inter', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Radii */
    --radius-sm: 0.5rem;
    --radius-md: 0.875rem;
    --radius-lg: 1.25rem;
    --radius-xl: 1.75rem;
    --radius-full: 999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 60px var(--color-accent-glow);

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 400ms;
  }
}

/* ─── Base ─── */
@layer base {
  body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  ::selection {
    background: rgba(45, 184, 0, 0.3);
    color: var(--color-text);
  }

  :focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
  }

  h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    text-wrap: balance;
  }

  h1 { font-size: clamp(2.75rem, 1.5rem + 5vw, 5rem); }
  h2 { font-size: clamp(2rem, 1rem + 3.5vw, 3.5rem); }
  h3 { font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem); }

  p { text-wrap: pretty; }

  .container {
    width: min(1200px, calc(100% - 2.5rem));
    margin-inline: auto;
  }
}

/* ─── Components ─── */
@layer components {

  /* ━━━ NAV ━━━ */
  #site-header {
    position: fixed;
    inset-block-start: var(--space-md);
    inset-inline: var(--space-md);
    z-index: 100;
    border-radius: var(--radius-xl);
    background: rgba(10, 15, 30, 0.35);
    backdrop-filter: blur(20px) saturate(190%);
    -webkit-backdrop-filter: blur(20px) saturate(190%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 
      inset 0 1px 1px 0 rgba(255, 255, 255, 0.12),
      0 4px 30px rgba(0, 0, 0, 0.4);
    transition: background-color var(--duration-normal) var(--ease-out),
                border-color var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out);
    transform: translate3d(0, 0, 0);
    will-change: transform;
  }

  #site-header.scrolled {
    background: rgba(2, 6, 23, 0.75);
    border-color: rgba(255, 255, 255, 0.05);
    box-shadow: 
      inset 0 1px 1px 0 rgba(255, 255, 255, 0.08),
      0 10px 40px rgba(0, 0, 0, 0.5);
  }

  .nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.75rem;
    padding-inline: var(--space-lg);
  }

  .brand { display: flex; align-items: center; gap: var(--space-sm); }

  .brand-logo {
    height: 1.75rem;
    width: auto;
    filter: brightness(0) invert(1);
    transition: opacity var(--duration-fast) var(--ease-out);
  }
  .brand:hover .brand-logo { opacity: 0.8; }

  .nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.25rem;
    border-radius: var(--radius-full);
  }
  .nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
    padding: 0.45rem 1.1rem;
    border-radius: var(--radius-full);
    transition: color var(--duration-fast) var(--ease-out),
                background-color var(--duration-normal) var(--ease-out);
    position: relative;
  }
  .nav-links a:hover { 
    color: var(--color-text); 
    background: rgba(255, 255, 255, 0.06);
  }
  .nav-links a.active {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.09);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  }

  .mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
  }
  .mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform var(--duration-normal) var(--ease-out),
                opacity var(--duration-fast) var(--ease-out);
  }
  .mobile-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .mobile-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ━━━ BUTTONS ━━━ */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
    cursor: pointer;
    transition: transform var(--duration-normal) var(--ease-spring),
                box-shadow var(--duration-normal) var(--ease-out),
                background-color var(--duration-fast) var(--ease-out);
  }
  .btn:hover:not(:disabled) {
    transform: translateY(-1px);
  }
  .btn:active:not(:disabled) {
    transform: translateY(0);
  }

  .btn-primary {
    background: var(--color-accent);
    color: var(--slate-950);
    box-shadow: 0 0 30px var(--color-accent-glow), var(--shadow-sm);
  }
  .btn-primary:hover:not(:disabled) {
    background: var(--green-300);
    box-shadow: 0 0 50px var(--color-accent-glow), var(--shadow-md);
  }

  .btn-ghost {
    background: rgba(148, 163, 184, 0.08);
    color: var(--color-text);
    border: 1px solid var(--color-border);
  }
  .btn-ghost:hover:not(:disabled) {
    background: rgba(148, 163, 184, 0.14);
    border-color: var(--color-border-hover);
  }

  .btn-lg {
    padding: 0.875rem 2rem;
    font-size: 0.9375rem;
  }

  /* ━━━ HERO ━━━ */
  .hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-block: 5.5rem 4rem;
    overflow: hidden;
  }

  .hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    pointer-events: none;
    will-change: transform;
    transform: translate3d(0, 0, 0);
  }

  .hero-glow--1 {
    width: 28rem;
    height: 28rem;
    inset-block-start: -10rem;
    inset-inline-start: -10rem;
    background: radial-gradient(circle, rgba(45, 184, 0, 0.08), transparent 70%);
    animation: float-glow 12s ease-in-out infinite alternate;
  }

  .hero-glow--2 {
    width: 24rem;
    height: 24rem;
    inset-block-start: -5rem;
    inset-inline-end: -8rem;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.06), transparent 70%);
    animation: float-glow 15s ease-in-out 3s infinite alternate-reverse;
  }

  .hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(148, 163, 184, 0.02) 1px, transparent 1px),
      linear-gradient(90deg, rgba(148, 163, 184, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
    pointer-events: none;
  }

  .hero-backdrop-orb {
    position: absolute;
    inset-block-start: 40%;
    inset-inline-start: 50%;
    transform: translate3d(-50%, -50%, 0);
    width: min(650px, 90vw);
    height: min(650px, 90vw);
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(45, 184, 0, 0.22) 0%, transparent 60%),
                radial-gradient(circle at 70% 30%, rgba(251, 191, 36, 0.12) 0%, transparent 60%),
                radial-gradient(circle at 50% 80%, rgba(139, 92, 246, 0.18) 0%, transparent 65%),
                radial-gradient(circle at 30% 70%, rgba(6, 182, 212, 0.14) 0%, transparent 60%);
    filter: blur(50px);
    opacity: 0.75;
    mix-blend-mode: screen;
    pointer-events: none;
    z-index: 1;
    animation: morph-orb 22s ease-in-out infinite alternate;
    will-change: transform;
    backface-visibility: hidden;
  }

  .hero-content {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
    align-items: flex-start;
    max-width: 1160px;
    margin-inline: auto;
  }

  .hero-text {
    position: relative;
    z-index: 2;
    padding-block-start: 1.5rem;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    background: rgba(45, 184, 0, 0.06);
    border: 1px solid rgba(45, 184, 0, 0.12);
    color: var(--green-200);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-block-end: var(--space-lg);
  }

  .pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 12px var(--color-accent);
    animation: pulse 2.5s ease-in-out infinite;
  }

  .hero h1 {
    font-size: clamp(2.45rem, 2rem + 2vw, 4rem);
    line-height: 1.1;
    margin-block-end: var(--space-lg);
  }

  .gradient-text {
    background: linear-gradient(135deg, var(--green-300), var(--green-200), var(--green-400));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-lead {
    font-size: clamp(1.0625rem, 0.9rem + 0.5vw, 1.25rem);
    line-height: 1.7;
    color: var(--color-muted);
    max-width: 36rem;
    margin-block-end: var(--space-xl);
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-block-end: var(--space-2xl);
  }

  .trust-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-full);
    background: rgba(148, 163, 184, 0.04);
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.8125rem;
    font-weight: 500;
  }
  .pill svg { opacity: 0.6; }

  /* ━━━ ARCHITECTURE DIAGRAM (Hero Visual) ━━━ */
  .hero-visual {
    position: relative;
    z-index: 2;
    padding-block-start: 0;
    width: 100%;
  }

  .arch-panel {
    width: 100%;
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-xl);
    background: rgba(15, 23, 42, 0.3);
    box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.03);
    padding: 1.15rem;
    overflow: hidden;
    /* Delay blur until parent opacity animation is complete to prevent box artifacts */
    backdrop-filter: blur(0px) saturate(100%);
    -webkit-backdrop-filter: blur(0px) saturate(100%);
    animation: reveal-panel-blur 0.6s ease-out 1.1s forwards;
  }

  .arch-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    margin-block-end: 0.65rem;
  }

  .arch-top-left {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    min-width: 0;
  }

  .arch-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 10px rgba(45, 184, 0, 0.8);
    animation: pulse 2.8s ease-in-out infinite;
    flex-shrink: 0;
  }

  .arch-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--slate-100);
    letter-spacing: -0.02em;
  }

  .arch-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    background: rgba(45, 184, 0, 0.08);
    color: var(--green-300);
    border: 1px solid rgba(45, 184, 0, 0.14);
  }

  .arch-subtitle {
    color: var(--slate-400);
    font-size: 0.88rem;
    margin-block-end: 0.85rem;
  }

  .arch-frame {
    position: relative;
    border: 1px solid rgba(148, 163, 184, 0.08);
    border-radius: calc(var(--radius-xl) - 0.25rem);
    background:
      radial-gradient(circle at 50% 6%, rgba(45, 184, 0, 0.08), transparent 18%),
      rgba(2, 6, 23, 0.22);
    padding: 0.7rem;
    overflow: hidden;
  }

  /* Sandbox Workspace Grid */
  .sandbox-workspace {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 1rem;
    height: 22.5rem;
    align-items: stretch;
  }
  
  .sandbox-col {
    display: flex;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.45);
    border: 1px solid rgba(148, 163, 184, 0.08);
    border-radius: 1rem;
    padding: 1rem;
    position: relative;
    overflow: hidden;
  }

  .sandbox-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-block-end: 0.85rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
    padding-block-end: 0.5rem;
  }

  .card-tag {
    font-family: var(--font-heading);
    font-size: 0.68rem;
    font-weight: 800;
    color: var(--slate-400);
    letter-spacing: 0.08em;
  }

  .goal-input-box {
    background: rgba(2, 6, 23, 0.4);
    border: 1px solid rgba(148, 163, 184, 0.06);
    border-radius: 0.5rem;
    padding: 0.65rem 0.85rem;
    margin-block-end: 1rem;
  }

  .goal-label {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--green-300);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-block-end: 0.2rem;
  }

  .goal-text {
    font-size: 0.85rem;
    color: var(--slate-100);
    line-height: 1.4;
    font-family: var(--font-body);
  }

  .task-decomposition {
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .task-list {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
  }

  .task-item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    background: rgba(2, 6, 23, 0.2);
    border: 1px solid transparent;
    font-size: 0.8rem;
    color: var(--slate-400);
    transition: all 0.3s var(--ease-out);
  }

  .task-item--active {
    color: var(--slate-100);
    border-color: rgba(45, 184, 0, 0.25);
    background: rgba(45, 184, 0, 0.03);
    box-shadow: 0 0 10px rgba(45, 184, 0, 0.03);
  }

  .task-item--completed {
    color: var(--slate-300);
    opacity: 0.85;
  }

  .task-check {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    border: 1px solid var(--slate-600);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.25s var(--ease-out);
    position: relative;
  }

  .task-item--active .task-check {
    border-color: var(--green-400);
  }

  .task-item--completed .task-check {
    background: var(--green-400);
    border-color: var(--green-400);
  }

  .task-item--completed .task-check::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 4px;
    border-left: 2px solid var(--slate-950);
    border-bottom: 2px solid var(--slate-950);
    transform: rotate(-45deg) translate(1px, -1px);
    box-sizing: border-box;
    left: 2px;
    top: 3px;
  }

  /* Console & Logs */
  .console-log-wrapper {
    flex: 1;
    overflow-y: auto;
    background: rgba(2, 6, 23, 0.55);
    border-radius: 0.5rem;
    border: 1px solid rgba(148, 163, 184, 0.05);
    padding: 0.75rem;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.72rem;
    line-height: 1.5;
    position: relative;
    height: 100%;
    min-height: 12.5rem;
  }

  .console-logs {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }

  .log-line {
    animation: fade-in 0.2s var(--ease-out) forwards;
    white-space: pre-wrap;
    word-break: break-all;
  }

  .log-line--system { color: var(--slate-400); }
  .log-line--planner { color: var(--purple-400); }
  .log-line--tool { color: var(--slate-300); }
  .log-line--success { color: var(--green-300); }
  .log-line--warning { color: var(--amber-400); }

  .console-spinner {
    width: 10px;
    height: 10px;
    border: 2px solid rgba(45, 184, 0, 0.15);
    border-top-color: var(--green-400);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
  }

  /* Inline Console Approval Card */
  .console-approval-card {
    background: rgba(45, 184, 0, 0.04);
    border: 1px solid rgba(45, 184, 0, 0.18);
    border-radius: 0.5rem;
    padding: 0.65rem 0.8rem;
    margin-block-start: 0.5rem;
    margin-block-end: 0.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    animation: fade-in 0.25s var(--ease-out) forwards;
    position: relative;
    overflow: hidden;
  }

  .approval-card-title {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--green-300);
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  .shield-icon {
    color: var(--green-400);
    filter: drop-shadow(0 0 3px rgba(45, 184, 0, 0.2));
  }

  .approval-card-text {
    font-size: 0.72rem;
    color: var(--slate-300);
    margin: 0;
    line-height: 1.4;
  }

  .approval-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-block-start: 0.15rem;
  }

  .approval-card-btn {
    padding: 0.25rem 0.6rem;
    font-size: 0.68rem;
    font-weight: 600;
    border-radius: 0.25rem;
    border: 1px solid transparent;
    transition: all 0.2s var(--ease-out);
  }

  .approval-card-btn--reject {
    background: transparent;
    border-color: rgba(239, 68, 68, 0.2);
    color: var(--red-400);
  }

  .approval-card-btn--approve {
    background: var(--green-400);
    color: var(--slate-950);
    box-shadow: 0 0 10px rgba(45, 184, 0, 0.2);
    cursor: pointer;
    position: relative;
  }

  .approval-card-btn--approve:hover {
    background: var(--green-300);
  }

  /* Virtual cursor simulation */
  .approval-card-btn--approve::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    transform: scale(0);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s, opacity 0.4s;
    inset-block-start: 50%;
    inset-inline-start: 50%;
    margin-block-start: -4px;
    margin-inline-start: -4px;
  }

  .approval-card-btn--approve.clicked::after {
    transform: scale(3);
    opacity: 1;
  }


  .arch-step:last-child::before {
    display: none;
  }

  .arch-step--active {
    transform: translateY(-3px);
    border-color: rgba(45, 184, 0, 0.28);
    background: rgba(15, 23, 42, 0.55);
    box-shadow: 0 0 0 1px rgba(45, 184, 0, 0.05);
  }
  .arch-step--policy {
    border-color: rgba(251, 191, 36, 0.18);
  }
  .arch-step--policy.arch-step--active {
    border-color: rgba(251, 191, 36, 0.28);
  }
  .arch-step--output {
    border-color: rgba(139, 92, 246, 0.16);
  }
  .arch-step--output.arch-step--active {
    border-color: rgba(139, 92, 246, 0.24);
  }

  .arch-step-header {
    display: flex;
    align-items: center;
    flex-direction: column;
    gap: 0.25rem;
  }

  .arch-step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.9rem;
    padding: 0.3rem 0.45rem;
    border-radius: var(--radius-full);
    background: rgba(45, 184, 0, 0.1);
    color: var(--green-300);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.08em;
  }

  .arch-step h3 {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--slate-100);
    margin: 0;
    text-align: center;
  }

  .arch-step p {
    color: var(--slate-400);
    font-size: 0.72rem;
    line-height: 1.3;
    margin-inline-start: 0;
    margin-block-start: auto;
    text-align: center;
  }

  /* Scroll indicator */
  .scroll-indicator {
    position: absolute;
    inset-block-end: 2rem;
    inset-inline: 0;
    display: flex;
    justify-content: center;
  }
  .scroll-line {
    width: 2px;
    height: 40px;
    background: var(--color-border);
    border-radius: 1px;
    position: relative;
    overflow: hidden;
  }
  .scroll-line::after {
    content: '';
    position: absolute;
    inset-block-start: 0;
    inset-inline: 0;
    height: 50%;
    background: var(--color-accent);
    border-radius: 1px;
    animation: scroll-pulse 2s ease-in-out infinite;
  }

  /* ━━━ SECTIONS ━━━ */
  .section {
    padding-block: 5.5rem;
    position: relative;
  }
  .section--dark {
    background: rgba(15, 23, 42, 0.18);
    border-block: 1px solid rgba(148, 163, 184, 0.08);
  }

  .section-header {
    max-width: 48rem;
    margin-block-end: var(--space-3xl);
  }
  .section-header.center {
    text-align: center;
    margin-inline: auto;
  }

  .section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-block-end: var(--space-md);
  }

  .section-desc {
    font-size: clamp(1rem, 0.9rem + 0.3vw, 1.125rem);
    color: var(--color-muted);
    line-height: 1.7;
    margin-block-start: var(--space-md);
    max-width: 38rem;
  }

  /* ━━━ CARDS ━━━ */
  .card-grid {
    display: grid;
    gap: var(--space-lg);
  }
  .card-grid--3 { grid-template-columns: repeat(3, 1fr); }
  .card-grid--2 { grid-template-columns: repeat(2, 1fr); }

  .card {
    padding: var(--space-xl);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-lg);
    background: rgba(15, 23, 42, 0.35);
    /* Delay blur until opacity animation is complete to prevent box artifacts */
    backdrop-filter: blur(0px) saturate(100%);
    -webkit-backdrop-filter: blur(0px) saturate(100%);
    transition: border-color var(--duration-normal) var(--ease-out),
                background-color var(--duration-normal) var(--ease-out),
                transform var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out),
                backdrop-filter 0.4s ease-out,
                -webkit-backdrop-filter 0.4s ease-out;
    cursor: default;
  }

  .card.revealed {
    backdrop-filter: blur(16px) saturate(130%);
    -webkit-backdrop-filter: blur(16px) saturate(130%);
    transition-delay: 0s, 0s, 0s, 0s, 0.45s, 0.45s;
  }
  .card--hover { cursor: pointer; }
  .card:hover {
    border-color: rgba(45, 184, 0, 0.16);
    background: rgba(15, 23, 42, 0.46);
  }
  .card--hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
    border-color: rgba(45, 184, 0, 0.16);
  }

  .card-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-md);
    display: grid;
    place-items: center;
    margin-block-end: var(--space-lg);
    background: var(--color-accent-subtle);
    border: 1px solid rgba(45, 184, 0, 0.15);
    color: var(--color-accent);
    transition: transform var(--duration-normal) var(--ease-spring);
  }
  .card:hover .card-icon {
    transform: scale(1.08);
  }
  .card-icon--purple {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.18);
    color: var(--purple-400);
  }
  .card-icon--amber {
    background: rgba(251, 191, 36, 0.08);
    border-color: rgba(251, 191, 36, 0.15);
    color: var(--amber-400);
  }

  .card h3 {
    margin-block-end: var(--space-sm);
    font-weight: 600;
  }
  .card p {
    color: var(--color-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
  }

  /* ━━━ PHILOSOPHY STRIP ━━━ */
  .philosophy-strip {
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(45, 184, 0, 0.035), rgba(139, 92, 246, 0.03));
    padding: var(--space-3xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
  }

  .comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .compare-card {
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.1);
    background: rgba(15, 23, 42, 0.32);
  }
  .compare-card--bad { border-color: rgba(239, 68, 68, 0.2); }
  .compare-card--good { border-color: rgba(45, 184, 0, 0.2); }

  .compare-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-block-end: var(--space-md);
  }
  .compare-card--bad .compare-header { color: var(--red-400); }
  .compare-card--good .compare-header { color: var(--color-accent); }

  .compare-card h3 {
    font-size: 1rem;
    font-weight: 600;
  }

  .compare-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }
  .compare-card li {
    font-size: 0.875rem;
    color: var(--color-muted);
    padding-inline-start: var(--space-md);
    position: relative;
  }
  .compare-card li::before {
    content: '';
    position: absolute;
    inset-inline-start: 0;
    inset-block-start: 0.55em;
    width: 4px;
    height: 4px;
    border-radius: 50%;
  }
  .compare-card--bad li::before { background: var(--red-400); }
  .compare-card--good li::before { background: var(--color-accent); }

  /* ━━━ PROCESS TIMELINE ━━━ */
  .process-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 48rem;
  }

  .process-step {
    display: grid;
    grid-template-columns: 4rem 1fr;
    gap: var(--space-lg);
    align-items: start;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.1);
    background: rgba(15, 23, 42, 0.32);
    transition: border-color var(--duration-normal) var(--ease-out),
                transform var(--duration-normal) var(--ease-out);
  }
  .process-step:hover {
    border-color: rgba(45, 184, 0, 0.2);
    transform: translateX(4px);
  }

  .step-number {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.6;
    line-height: 1;
    padding-block-start: 2px;
  }

  .step-content h3 {
    font-weight: 600;
    margin-block-end: var(--space-xs);
  }
  .step-content p {
    color: var(--color-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
  }

  /* ━━━ CTA ━━━ */
  .cta-section {
    padding-block: var(--space-5xl);
  }

  .cta-card {
    position: relative;
    text-align: center;
    padding: var(--space-4xl) var(--space-xl);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: var(--radius-xl);
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.34), rgba(15, 23, 42, 0.48));
    box-shadow: var(--shadow-lg);
    overflow: hidden;
  }
  .cta-card .section-desc {
    max-width: 40rem;
    margin-inline: auto;
  }
  .cta-card .btn {
    margin-block-start: var(--space-xl);
  }

  .cta-glow {
    position: absolute;
    inset: -50%;
    background: radial-gradient(circle at center, rgba(45, 184, 0, 0.045), transparent 50%);
    pointer-events: none;
    animation: float-glow 10s ease-in-out infinite alternate;
  }

  /* ━━━ FOOTER ━━━ */
  .site-footer {
    border-block-start: 1px solid rgba(148, 163, 184, 0.08);
    padding-block: var(--space-3xl);
  }

  .footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    text-align: center;
  }

  .footer-logo {
    height: 1.5rem;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.6;
    margin-inline: auto;
    margin-block-end: var(--space-sm);
  }

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

  .footer-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-muted);
    font-size: 0.8125rem;
  }
  .footer-sep { opacity: 0.4; }

  .footer-copy {
    font-size: 0.75rem;
    color: var(--slate-500);
  }

  .cta-note {
    margin-block-start: var(--space-lg);
    color: var(--slate-400);
    font-size: 0.875rem;
  }
}

/* ─── Animations ─── */
@layer utilities {

  /* Entrance animation for hero elements */
  .animate-in {
    opacity: 0;
    transform: translateY(24px);
    animation: fade-up 0.8s var(--ease-out) forwards;
    animation-delay: var(--delay, 0s);
  }

  /* Scroll reveal — initial state (JS toggles .revealed) */
  .reveal-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.45s var(--ease-out),
                transform 0.45s var(--ease-out);
    transition-delay: var(--delay, 0s);
  }
  .reveal-up.revealed {
    opacity: 1;
    transform: translateY(0);
  }

  @keyframes fade-up {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes node-appear {
    from {
      opacity: 0;
      transform: translateX(-12px);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--color-accent); }
    50%      { opacity: 0.5; box-shadow: 0 0 4px var(--color-accent); }
  }

  @keyframes scroll-pulse {
    0%   { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
  }

  @keyframes reveal-panel-blur {
    to {
      backdrop-filter: blur(18px) saturate(135%);
      -webkit-backdrop-filter: blur(18px) saturate(135%);
    }
  }

  @keyframes float-glow {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, 20px) scale(1.05); }
  }

  @keyframes morph-orb {
    0% {
      transform: translate3d(-50%, -50%, 0) rotate(0deg) scale(0.9);
    }
    33% {
      transform: translate3d(-47%, -53%, 0) rotate(120deg) scale(1.08);
    }
    66% {
      transform: translate3d(-53%, -47%, 0) rotate(240deg) scale(0.88);
    }
    100% {
      transform: translate3d(-50%, -50%, 0) rotate(360deg) scale(0.9);
    }
  }

  @keyframes connector-pulse {
    0%   { transform: translateY(-100%); opacity: 1; }
    100% { transform: translateY(250%); opacity: 0.3; }
  }

  /* ─── Reduced motion ─── */
  @media (prefers-reduced-motion: reduce) {
    .animate-in,
    .reveal-up {
      animation: none;
      transition: none;
      opacity: 1;
      transform: none;
    }

    .hero-glow,
    .hero-backdrop-orb,
    .cta-glow {
      animation: none;
    }

    .pulse-dot {
      animation: none;
    }

    .scroll-line::after {
      animation: none;
    }

    .flow-node {
      animation: none;
      opacity: 1;
      transform: none;
    }

    .btn,
    .card,
    .process-step,
    .nav-links a::after,
    .cta-note {
      transition: none;
    }
  }
}

@media (max-width: 1024px) {
  .card-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .philosophy-strip {
    grid-template-columns: 1fr;
    padding: var(--space-xl) var(--space-md);
    gap: var(--space-xl);
  }
  .sandbox-workspace {
    grid-template-columns: 1fr;
    height: auto;
  }
  .console-log-wrapper {
    height: 14rem !important;
    max-height: 14rem !important;
  }
  .hero-text { padding-block-start: 0; }
  .hero-visual { padding-block-start: 0; }
  .hero-content { gap: var(--space-3xl); max-width: 1000px; }
}

@media (max-width: 768px) {
  :root {
    --space-5xl: 5rem;
  }

  .nav-links { display: none; }
  .mobile-toggle { display: flex; }
  .hero {
    padding-block-start: 7.5rem;
  }

  /* Mobile menu overlay */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 5rem var(--space-md) auto var(--space-md);
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    gap: var(--space-lg);
    z-index: 99;
    animation: fade-up 0.3s var(--ease-out);
  }
  .nav-links.open a {
    font-size: 1.125rem;
    color: var(--color-text);
  }

  #nav-cta { display: none; }

  .card-grid--3 { grid-template-columns: 1fr; }

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

  .hero h1 { font-size: clamp(2.25rem, 1.5rem + 4vw, 3.5rem); }

  .process-step {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  .step-number {
    font-size: 1.25rem;
  }
  .arch-panel {
    padding: 1rem;
  }
  .sandbox-col {
    padding: 0.85rem;
  }
  .goal-input-box {
    margin-block-end: 0.75rem;
  }
  .task-list {
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .nav-bar { padding-inline: var(--space-md); }
  .trust-pills { flex-direction: column; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .cta-note { text-align: center; }
  .arch-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
  .arch-title {
    font-size: 0.88rem;
  }
  .goal-text {
    font-size: 0.8rem;
  }
  .task-item {
    font-size: 0.75rem;
    padding: 0.4rem 0.6rem;
  }
  .console-log-wrapper {
    font-size: 0.68rem;
    height: 12rem !important;
    max-height: 12rem !important;
  }
  .approval-box {
    padding: 0.85rem;
  }
  .approval-actions {
    flex-direction: column;
    gap: 0.4rem;
  }
  .approval-btn {
    width: 100%;
  }
}