/* ============================================
   VENTUREFORGE THEME
   Dark intelligence. Warm gold accents.
   ============================================ */

:root {
  --bg: #0f0f0f;
  --bg-surface: #181818;
  --bg-card: #1f1f1f;
  --fg: #f0ede8;
  --fg-muted: #9a9590;
  --fg-subtle: #5c5955;
  --accent: #e8a838;
  --accent-dim: #c49030;
  --accent-glow: rgba(232, 168, 56, 0.15);
  --border: rgba(240, 237, 232, 0.08);
  --border-accent: rgba(232, 168, 56, 0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* HEADER */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 15, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.header-tag {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
}

/* HERO */
.hero {
  padding: 140px 32px 80px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(42px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 28px;
}

.hero-lede {
  font-size: 18px;
  line-height: 1.7;
  color: var(--fg-muted);
  max-width: 480px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
}

.stat { display: flex; flex-direction: column; gap: 2px; }

.stat-number {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 22px;
  color: var(--accent);
}

.stat-label {
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

/* CONCEPT CARD STACK */
.hero-visual { position: relative; }

.concept-card-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.concept-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  position: relative;
  transition: border-color 0.2s;
}

.concept-card:hover {
  border-color: var(--border-accent);
}

.concept-card-1 { transform: translateX(0); }
.concept-card-2 { transform: translateX(16px); }
.concept-card-3 { transform: translateX(32px); }

.card-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--border-accent);
  border-radius: 3px;
  padding: 2px 7px;
  margin-bottom: 10px;
}

.card-title {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: var(--fg);
  margin-bottom: 6px;
  line-height: 1.3;
}

.card-detail {
  font-size: 12px;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* OUTPUTS SECTION */
.outputs {
  padding: 96px 32px;
  border-bottom: 1px solid var(--border);
}

.outputs-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: clamp(28px, 3.5vw, 42px);
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 64px;
  max-width: 600px;
}

.outputs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.output-item {
  background: var(--bg-surface);
  padding: 40px 36px;
  transition: background 0.2s;
}

.output-item:hover { background: var(--bg-card); }

.output-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}

.output-item h3 {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 16px;
  color: var(--fg);
  margin-bottom: 10px;
}

.output-item p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* PROCESS SECTION */
.process {
  padding: 96px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}

.process-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.process-steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 0;
}

.step {
  flex: 1;
  padding: 40px 40px 40px 0;
}

.step-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 48px;
  color: var(--accent);
  opacity: 0.4;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.step-body h3 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  margin-bottom: 10px;
}

.step-body p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}

.step-connector {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, var(--border), var(--border-accent));
  flex-shrink: 0;
  margin-bottom: 100px;
}

/* PRINCIPLES */
.principles {
  padding: 96px 32px;
  border-bottom: 1px solid var(--border);
}

.principles-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.principles-stack {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 0;
}

.principle {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
}

.principle:last-child { border-bottom: none; }

.principle-mark {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--accent);
  opacity: 0.5;
  flex-shrink: 0;
  margin-top: 2px;
}

.principle p {
  font-family: 'Syne', sans-serif;
  font-weight: 500;
  font-size: 20px;
  line-height: 1.55;
  color: var(--fg-muted);
  letter-spacing: -0.01em;
}

/* CLOSING */
.closing {
  padding: 96px 32px 120px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 100%);
}

.closing-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.closing-text {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.45;
  color: var(--fg);
  letter-spacing: -0.02em;
}

/* FOOTER */
.site-footer {
  padding: 32px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: var(--fg-muted);
}

.footer-tagline {
  font-size: 12px;
  color: var(--fg-subtle);
  letter-spacing: 0.05em;
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
  .hero {
    padding: 120px 24px 60px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual { display: none; }

  .outputs { padding: 64px 24px; }

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

  .output-item { padding: 28px 24px; }

  .process { padding: 64px 24px; }

  .process-steps {
    flex-direction: column;
    gap: 0;
  }

  .step-connector {
    width: 1px;
    height: 32px;
    background: linear-gradient(180deg, var(--border), var(--border-accent));
    margin: 0 0 0 40px;
  }

  .step { padding: 28px 0 28px 0; }

  .principles { padding: 64px 24px; }

  .principle p { font-size: 17px; }

  .closing { padding: 64px 24px 80px; }

  .site-footer { padding: 24px; }

  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}

/* ============================================
   MVP CONCEPT GENERATOR
   ============================================ */

.mvp-main {
  padding: 120px 32px 80px;
  min-height: 100vh;
}

.mvp-container {
  max-width: 720px;
  margin: 0 auto;
}

.mvp-header {
  margin-bottom: 48px;
}

.mvp-eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.mvp-title {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 16px;
}

.mvp-subtitle {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 560px;
}

.mvp-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.mvp-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mvp-field label {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

.mvp-field input,
.mvp-field textarea,
.mvp-field select {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  color: var(--fg);
  transition: border-color 0.2s;
  resize: vertical;
}

.mvp-field input::placeholder,
.mvp-field textarea::placeholder {
  color: var(--fg-subtle);
}

.mvp-field input:focus,
.mvp-field textarea:focus,
.mvp-field select:focus {
  outline: none;
  border-color: var(--border-accent);
}

.mvp-field select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239a9590' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.mvp-submit {
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  padding: 14px 32px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
  margin-top: 8px;
  position: relative;
  min-height: 48px;
}

.mvp-submit:hover:not(:disabled) {
  background: var(--accent-dim);
}

.mvp-submit:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.mvp-submit.loading .mvp-submit-text {
  opacity: 0;
}

.mvp-submit.loading .mvp-submit-loader {
  display: block;
}

.mvp-submit-loader {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 18px;
  height: 18px;
  border: 2px solid rgba(15, 15, 15, 0.3);
  border-top-color: var(--bg);
  border-radius: 50%;
  animation: mvp-spin 0.7s linear infinite;
}

@keyframes mvp-spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.mvp-error {
  background: rgba(220, 80, 80, 0.1);
  border: 1px solid rgba(220, 80, 80, 0.3);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 14px;
  color: #dc5050;
  margin-bottom: 24px;
}

.mvp-result {
  margin-top: 48px;
}

.mvp-result-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 24px;
  color: var(--fg);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.mvp-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mvp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
  transition: border-color 0.2s;
}

.mvp-card:hover {
  border-color: var(--border-accent);
}

.mvp-card-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--border-accent);
  border-radius: 3px;
  padding: 2px 7px;
  margin-bottom: 12px;
}

.mvp-card-title {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 16px;
  color: var(--fg);
  margin-bottom: 10px;
  line-height: 1.3;
}

.mvp-card-body {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
  white-space: pre-wrap;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .mvp-main {
    padding: 100px 24px 60px;
  }
}