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

/* === HashiCorp-inspired Design System === */
:root {
  /* Brand Primary */
  --mds-color-black: #000000;
  --mds-color-dark-charcoal: #15181e;
  --mds-color-near-black: #0d0e12;
  
  /* Neutral Scale */
  --mds-color-light-gray: #f1f2f3;
  --mds-color-mid-gray: #d5d7db;
  --mds-color-cool-gray: #b2b6bd;
  --mds-color-dark-gray: #656a76;
  --mds-color-charcoal: #3b3d45;
  --mds-color-near-white: #efeff1;
  
  /* Accent Colors */
  --mds-color-action-blue: #03a9f4;
  --mds-color-link-blue: #0288d1;
  --mds-color-bright-blue: #29b6f6;
  --mds-color-purple: #7b42bc;
  --mds-color-teal: #14c6cb;
  
  /* Shadows */
  --mds-shadow-whisper: rgba(97, 104, 117, 0.05) 0px 1px 1px, rgba(97, 104, 117, 0.05) 0px 2px 2px;
  --mds-shadow-border: rgba(178, 182, 189, 0.4);
}

body { 
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.63;
}

/* Headings: Inter or system with tight line-height and kern */
h1, h2, h3, h4, h5, h6, .font-display { 
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-feature-settings: "kern";
  line-height: 1.17;
}

/* Dot grid background */
.dot-grid {
    background-image: radial-gradient(circle, rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 28px 28px;
}
.light .dot-grid, :not(.dark) .dot-grid-light {
    background-image: radial-gradient(circle, rgba(0,0,0,0.04) 1px, transparent 1px);
}

/* Noise texture */
.noise::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    opacity: 0.025;
    pointer-events: none;
    z-index: 9999;
}

/* Gradient text - subtle, professional */
.text-gradient {
    background: linear-gradient(135deg, var(--mds-color-action-blue) 0%, #0277bd 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Uppercase labels (wayfinding) */
.uppercase-label {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.69;
    letter-spacing: 1.3px;
    text-transform: uppercase;
}

/* Card - HashiCorp style with micro-shadows */
.glass-card {
    background: var(--mds-color-dark-charcoal);
    border: 1px solid rgba(178, 182, 189, 0.1);
    border-radius: 8px;
    box-shadow: var(--mds-shadow-whisper);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.glass-card:hover {
    background: #1a1d24;
    border-color: rgba(178, 182, 189, 0.2);
    transform: translateY(-2px);
}
.light .glass-card, :not(.dark) .glass-card-light {
    background: #ffffff;
    border-color: rgba(0,0,0,0.06);
}

/* Nav - clean, minimal */
.glass-nav {
    background: rgba(13, 14, 18, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(178, 182, 189, 0.1);
}
.light .glass-nav {
    background: rgba(255,255,255,0.95);
    border-bottom-color: rgba(0,0,0,0.06);
}

/* SVG stroke draw-in animation (controlled by GSAP) */
.draw-in {
    stroke-dasharray: var(--len, 300);
    stroke-dashoffset: var(--len, 300);
}

/* Platform card */
.platform-card { 
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); 
    border-radius: 8px;
}
.platform-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--mds-shadow-whisper), 0 8px 24px -8px rgba(0, 0, 0, 0.3);
}
.platform-card.recommended {
    border: 1px solid var(--mds-color-action-blue);
    box-shadow: var(--mds-shadow-whisper);
}
.platform-recommended-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 3px 12px;
    background: var(--mds-color-action-blue);
    border-radius: 5px;
    color: white;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--mds-shadow-whisper);
    z-index: 10;
}

/* FAQ accordion */
.faq-item {
    background: var(--mds-color-dark-charcoal);
    border: 1px solid rgba(178, 182, 189, 0.1);
    border-radius: 8px;
    transition: background 0.3s ease, border-color 0.3s ease;
}
.faq-item:hover {
    background: #1a1d24;
    border-color: rgba(178, 182, 189, 0.15);
}
.faq-item.active {
    background: #1a1d24;
    border-color: rgba(178, 182, 189, 0.2);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 24px;
    text-align: left;
    cursor: pointer;
    background: none;
    border: none;
    outline: none;
    gap: 16px;
    font-family: 'Inter', system-ui, sans-serif;
}
.faq-question:focus-visible {
    outline: 3px solid var(--mds-color-action-blue);
    outline-offset: -3px;
    border-radius: 8px;
}
.faq-chevron {
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}
.faq-item.active .faq-chevron {
    transform: rotate(180deg);
}
.faq-answer-inner {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    opacity: 0;
}
.faq-item.active .faq-answer-inner {
    opacity: 1;
}
#faqShowMore i {
    transition: transform 0.3s ease;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(178, 182, 189, 0.2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(178, 182, 189, 0.4); }

/* Demo canvas */
.demo-tool {
    color: var(--mds-color-dark-gray);
    background: transparent;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    border-radius: 5px;
}
.demo-tool:hover { background: rgba(255,255,255,0.05); color: var(--mds-color-near-white); }
.demo-tool.active {
    background: rgba(3, 169, 244, 0.15);
    color: var(--mds-color-action-blue);
}
#demoCanvas { cursor: crosshair; touch-action: none; }

/* Section reveal (before GSAP loads) */
.gsap-reveal { opacity: 0; transform: translateY(40px); }

/* Floating animation - more subtle */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}
.animate-float { animation: float 6s ease-in-out infinite; }

/* Glow pulse - subtle */
@keyframes glowPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.5; }
}

/* Button styles - HashiCorp inspired */
.btn-primary {
    background: var(--mds-color-dark-charcoal);
    color: var(--mds-color-mid-gray);
    padding: 9px 15px 9px 15px;
    border-radius: 5px;
    border: 1px solid var(--mds-shadow-border);
    box-shadow: var(--mds-shadow-whisper);
    font-weight: 500;
    font-size: 15px;
    transition: all 0.2s ease;
}
.btn-primary:hover {
    background: #1a1d24;
}
.btn-primary:focus-visible {
    outline: 3px solid var(--mds-color-action-blue);
}

.btn-secondary {
    background: #ffffff;
    color: var(--mds-color-charcoal);
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid rgba(178, 182, 189, 0.4);
    box-shadow: var(--mds-shadow-whisper);
    font-weight: 500;
    transition: all 0.2s ease;
}
.btn-secondary:hover {
    background: var(--mds-color-light-gray);
}

.btn-accent {
    background: var(--mds-color-action-blue);
    color: #ffffff;
    padding: 9px 15px 9px 15px;
    border-radius: 5px;
    border: none;
    box-shadow: var(--mds-shadow-whisper);
    font-weight: 600;
    font-size: 15px;
    transition: all 0.2s ease;
}
.btn-accent:hover {
    background: var(--mds-color-bright-blue);
}
.btn-accent:focus-visible {
    outline: 3px solid var(--mds-color-action-blue);
    outline-offset: 2px;
}

/* Badge styles */
.badge {
    background: #42225b;
    color: var(--mds-color-near-white);
    padding: 3px 7px;
    border-radius: 5px;
    border: 1px solid rgb(180, 87, 255);
    font-size: 13px;
    font-weight: 600;
}

/* Link styles */
a.link-dark {
    color: var(--mds-color-action-blue);
    text-decoration: none;
}
a.link-dark:hover {
    color: var(--mds-color-bright-blue);
    text-decoration: underline;
}

/* Focus ring system */
.focus-ring:focus-visible {
    outline: 3px solid var(--mds-color-action-blue);
    outline-offset: 2px;
}