/* ============================================================
   COLD SMOKE CONSULTING — Design System
   Dark theme, amber accent, Space Grotesk + Inter + JetBrains Mono
   ============================================================ */

:root {
  --color-bg:               #0e1117;
  --color-surface:          #161b25;
  --color-surface-elevated: #1e2535;
  --color-text-primary:     #e8e8e2;
  --color-text-muted:       #8892a4;
  --color-accent:           #d97706;
  --color-accent-hover:     #b45309;
  --color-accent-cool:      #38bdf8;
  --color-border:           #2a3040;
  --color-success:          #22c55e;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  --max-width: 1200px;
  --space-xs:  8px;
  --space-sm:  16px;
  --space-md:  24px;
  --space-lg:  48px;
  --space-xl:  96px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-btn: 6px;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-card-hover: 0 4px 24px rgba(0,0,0,0.35);
}

/* ── Reset & Base ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent-cool); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { font-family: var(--font-display); color: var(--color-text-primary); line-height: 1.15; }
h1 { font-size: clamp(38px, 6vw, 68px); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 600; margin-bottom: var(--space-lg); }
h3 { font-family: var(--font-body); font-size: clamp(18px, 2vw, 22px); font-weight: 600; margin-bottom: var(--space-sm); }

p { margin-bottom: var(--space-sm); }
p:last-child { margin-bottom: 0; }

code, pre { font-family: var(--font-mono); font-size: 14px; }

/* ── Layout ────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-pad { padding: var(--space-xl) 0; }

@media (max-width: 768px) {
  .section-pad { padding: 64px 0; }
}

/* ── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  cursor: pointer;
  border: none;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #0e1117;
}
.btn-primary:hover { background: var(--color-accent-hover); text-decoration: none; color: #0e1117; }

.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-accent-cool); color: var(--color-accent-cool); text-decoration: none; }

.btn-sm { padding: 8px 18px; font-size: 14px; }

/* ── Navigation ────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background 0.15s ease, padding 0.15s ease, box-shadow 0.15s ease;
}

.nav.scrolled {
  background: var(--color-bg);
  padding: 12px 0;
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
}
.nav-wordmark:hover { text-decoration: none; color: var(--color-text-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-links a:not(.btn):hover { color: var(--color-accent-cool); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform 0.2s, opacity 0.2s;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 22px; }
}

/* ── Hero ──────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, #1e2535 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 70%, rgba(217,119,6,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero h1 { margin-bottom: var(--space-md); }

.hero-sub {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.hero-cred {
  font-size: 14px;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}

/* ── Proof Strip ───────────────────────────────────── */
.proof-strip {
  background: var(--color-surface);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.proof-item {
  text-align: center;
}

.proof-number {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-xs);
}
.proof-unit { font-family: var(--font-display); font-size: 24px; color: var(--color-accent); }

.proof-item p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin: 0;
  max-width: 180px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .proof-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
}
@media (max-width: 480px) {
  .proof-grid { grid-template-columns: 1fr; }
}

/* ── Services ──────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

@media (max-width: 900px) { .services-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.card-icon {
  color: var(--color-accent-cool);
  margin-bottom: var(--space-md);
}

.card-outcome {
  font-size: 14px;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-sm);
  margin-top: var(--space-sm);
}

/* ── Case Studies ──────────────────────────────────── */
.case-studies { background: var(--color-bg); }

.case-study {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  margin-bottom: var(--space-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.case-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent-cool);
  border: 1px solid var(--color-accent-cool);
  border-radius: var(--radius-sm);
  padding: 2px 10px;
  margin-bottom: var(--space-sm);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-md);
}

.tech-tags span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
}

.case-studies-note {
  text-align: center;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: var(--space-lg);
}

/* ── How It Works ──────────────────────────────────── */
.how-it-works { background: var(--color-surface); }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(16.67% + 20px);
  right: calc(16.67% + 20px);
  height: 1px;
  background: var(--color-border);
}

@media (max-width: 768px) {
  .steps-grid { grid-template-columns: 1fr; }
  .steps-grid::before { display: none; }
}

.step { padding: 0 var(--space-xs); }

.step-number {
  display: block;
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  line-height: 1;
}

/* ── Credentials ───────────────────────────────────── */
.credentials { background: var(--color-bg); }

.credentials-inner {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.aws-badge { margin: 0 auto var(--space-md); }

.cred-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--space-md);
}
.cred-body { font-size: 16px; color: var(--color-text-muted); margin-bottom: var(--space-xs); }
.cred-muted { font-size: 14px; }

/* ── Contact ───────────────────────────────────────── */
.contact {
  background: #0f1208;
  position: relative;
}
.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 50%, rgba(217,119,6,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.contact .container { position: relative; z-index: 1; }

.contact h2 { margin-bottom: var(--space-sm); }

.contact-sub {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  max-width: 560px;
}

.contact-form { max-width: 640px; }

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

@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-md);
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  transition: border-color 0.15s;
  outline: none;
}

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

.form-group textarea { resize: vertical; }

/* ── Footer ────────────────────────────────────────── */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--space-lg) var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 14px;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-nav a:hover { color: var(--color-text-primary); }

.footer-legal {
  border-top: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
}
.footer-legal p {
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
  margin: 0;
}

/* ── Animations ────────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
  }
  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; }
  * { transition: none !important; animation: none !important; }
}