/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-base: #080c14;
  --bg-card: #0f1624;
  --bg-card2: #131d2e;
  --bg-input: #0a1120;
  --border: rgba(99,179,237,0.12);
  --border-glow: rgba(99,179,237,0.35);
  --text-primary: #e8f0fe;
  --text-secondary: #8ba3c7;
  --text-muted: #4a6080;
  --accent: #4f9cf9;
  --accent2: #a78bfa;
  --accent3: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --gold: #f59e0b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 32px rgba(79,156,249,0.15);
  --font-thai: 'Sarabun', sans-serif;
  --font-en: 'Inter', sans-serif;
  --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-thai);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== NAVBAR ===== */
.site-header {
  background: linear-gradient(180deg, #060b12 0%, #0a1320 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.site-header::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(79,156,249,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.navbar {
  max-width: 1200px; margin: 0 auto;
  padding: 1.1rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-en); font-weight: 800; font-size: 1.35rem;
  color: var(--text-primary); text-decoration: none;
}
.brand-icon { font-size: 1.5rem; filter: drop-shadow(0 0 8px rgba(79,156,249,0.7)); }
.brand-ai {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.nav-links { display: flex; align-items: center; gap: 0.5rem; }
.nav-link {
  padding: 0.45rem 1rem; border-radius: 8px;
  color: var(--text-secondary); text-decoration: none; font-size: 0.9rem;
  transition: var(--transition); cursor: pointer;
}
.nav-link:hover, .nav-settings { color: var(--accent); background: rgba(79,156,249,0.08); }

/* ===== HERO ===== */
.hero {
  max-width: 900px; margin: 0 auto;
  padding: 5rem 2rem 4rem; text-align: center; position: relative;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0.4rem 1rem; border-radius: 999px;
  border: 1px solid rgba(79,156,249,0.3);
  background: rgba(79,156,249,0.08);
  color: var(--accent); font-size: 0.85rem; font-weight: 500;
  margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800;
  line-height: 1.35; margin-bottom: 1.2rem;
  color: var(--text-primary);
}
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent3));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  /* เพิ่ม padding เพื่อไม่ให้สระ/วรรณยุกต์บนและล่างถูกตัด */
  padding-bottom: 0.2em; padding-top: 0.1em;
  display: inline-block; 
}
.hero-subtitle {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 600px; margin: 0 auto 2.5rem; line-height: 1.8;
}
.hero-stats {
  display: inline-flex; align-items: center; gap: 0;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.6rem 2rem;
}
.stat-item { text-align: center; padding: 0 1.5rem; }
.stat-num { display: block; font-size: 1.4rem; font-weight: 800; color: var(--accent); font-family: var(--font-en); }
.stat-label { font-size: 0.75rem; color: var(--text-muted); }
.stat-divider { width: 1px; height: 32px; background: var(--border); }

/* ===== SETTINGS PANEL ===== */
.settings-panel {
  background: var(--bg-card2); border-bottom: 1px solid var(--border);
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.settings-panel.open { max-height: 320px; }
.settings-inner {
  max-width: 800px; margin: 0 auto; padding: 1.5rem 2rem;
}
.settings-title { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.settings-desc { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 1rem; }
.settings-desc a { color: var(--accent); text-decoration: none; }
.settings-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.settings-input {
  flex: 1; min-width: 280px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.6rem 1rem;
  color: var(--text-primary); font-family: var(--font-en); font-size: 0.9rem;
  outline: none; transition: border-color var(--transition);
}
.settings-input:focus { border-color: var(--accent); }
.settings-status { font-size: 0.8rem; margin-top: 0.5rem; color: var(--accent3); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.4rem; border-radius: var(--radius-sm);
  font-family: var(--font-thai); font-size: 0.9rem; font-weight: 600;
  border: none; cursor: pointer; transition: var(--transition);
  text-decoration: none; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #3b7de8);
  color: #fff; box-shadow: 0 4px 16px rgba(79,156,249,0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(79,156,249,0.4); }
.btn-secondary {
  background: rgba(167,139,250,0.15); color: var(--accent2);
  border: 1px solid rgba(167,139,250,0.3);
}
.btn-secondary:hover { background: rgba(167,139,250,0.25); }
.btn-ghost {
  background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--border-glow); color: var(--text-primary); }
.btn-analyze {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; padding: 1rem 2.5rem; font-size: 1.05rem;
  border-radius: 999px; box-shadow: 0 6px 32px rgba(79,156,249,0.35);
}
.btn-analyze:hover { transform: translateY(-2px); box-shadow: 0 10px 40px rgba(79,156,249,0.5); }
.btn-icon { font-size: 1.1rem; }
.btn-arrow { font-size: 1.1rem; transition: transform var(--transition); }
.btn-analyze:hover .btn-arrow { transform: translateX(4px); }

/* ===== MAIN CONTENT ===== */
.main-content { position: relative; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* ===== INTRO SECTION ===== */
.section-intro {
  padding: 4rem 0 2rem;
  background: linear-gradient(180deg, #0a1320 0%, var(--bg-base) 100%);
}
.intro-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr));
  gap: 1.5rem;
}
.intro-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2rem 1.5rem; text-align: center;
  transition: var(--transition);
}
.intro-card:hover { border-color: var(--border-glow); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.intro-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.intro-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.intro-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== CANVAS SECTION ===== */
.section-canvas { padding: 4rem 0; }

.section-header { text-align: center; margin-bottom: 3rem; }
.section-badge {
  display: inline-block; padding: 0.3rem 1rem; border-radius: 999px;
  background: rgba(79,156,249,0.1); border: 1px solid rgba(79,156,249,0.25);
  color: var(--accent); font-size: 0.8rem; font-weight: 600; font-family: var(--font-en);
  margin-bottom: 0.8rem;
}
.section-title { font-size: 1.9rem; font-weight: 800; margin-bottom: 0.6rem; }
.section-desc { color: var(--text-secondary); font-size: 1rem; }

/* Business Header Card */
.business-header-card {
  background: var(--bg-card); border: 1px solid var(--border-glow);
  border-radius: var(--radius); padding: 2rem;
  margin-bottom: 2rem; box-shadow: var(--shadow-glow);
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-label {
  font-size: 0.9rem; font-weight: 600; color: var(--text-secondary);
  display: flex; align-items: center; gap: 0.4rem;
}
.label-icon { font-size: 1rem; }
.required { color: var(--accent); }
.form-input, .form-textarea {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.75rem 1rem;
  color: var(--text-primary); font-family: var(--font-thai); font-size: 0.95rem;
  outline: none; transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.form-input:focus, .form-textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,156,249,0.12);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }

/* ===== CANVAS GRID ===== */
.canvas-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.3fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1rem;
}

.canvas-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.4rem;
  transition: var(--transition); position: relative; overflow: hidden;
}
.canvas-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}
.canvas-card:hover { border-color: var(--border-glow); transform: translateY(-2px); box-shadow: var(--shadow); }

.card-partners { grid-column: 1; grid-row: 1 / 3; }
.card-partners::before { background: linear-gradient(90deg, #6366f1, #8b5cf6); }

.card-activities { grid-column: 2; grid-row: 1; }
.card-activities::before { background: linear-gradient(90deg, #3b82f6, #60a5fa); }

.card-value { grid-column: 3; grid-row: 1 / 3; }
.card-value::before { background: linear-gradient(90deg, var(--gold), #f97316); }
.card-value .card-subtitle { color: var(--gold) !important; }

.card-relationships { grid-column: 4; grid-row: 1; }
.card-relationships::before { background: linear-gradient(90deg, #ec4899, #f43f5e); }

.card-segments { grid-column: 5; grid-row: 1 / 3; }
.card-segments::before { background: linear-gradient(90deg, var(--accent3), #10b981); }

.card-resources { grid-column: 2; grid-row: 2; }
.card-resources::before { background: linear-gradient(90deg, #0ea5e9, #38bdf8); }

.card-channels { grid-column: 4; grid-row: 2; }
.card-channels::before { background: linear-gradient(90deg, #a855f7, #c084fc); }

.card-cost { grid-column: 1 / 3; grid-row: 3; }
.card-cost::before { background: linear-gradient(90deg, var(--danger), #fb7185); }

.card-revenue { grid-column: 3 / 6; grid-row: 3; }
.card-revenue::before { background: linear-gradient(90deg, var(--accent3), #059669); }

.card-header {
  display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 1rem;
}
.card-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.card-title { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); line-height: 1.3; font-family: var(--font-en); }
.card-subtitle { font-size: 0.78rem; color: var(--text-secondary); margin-top: 2px; }

.card-textarea {
  width: 100%; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 0.75rem; outline: none; resize: none;
  color: var(--text-primary); font-family: var(--font-thai); font-size: 0.85rem;
  line-height: 1.6; min-height: 120px;
  overflow-y: auto;
  transition: border-color var(--transition), box-shadow var(--transition);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.card-textarea::-webkit-scrollbar { width: 0px; height: 0px; }
.card-textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,156,249,0.1);
}
.card-textarea::placeholder { color: var(--text-muted); font-size: 0.82rem; }

/* Analyze CTA */
.analyze-cta {
  margin-top: 2.5rem; display: flex; flex-direction: column;
  align-items: center; gap: 1.2rem;
}
.cta-info {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--text-secondary); font-size: 0.9rem;
  background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.2);
  padding: 0.6rem 1.2rem; border-radius: 999px;
}
.cta-info-icon { font-size: 1rem; }

/* ===== ANALYSIS SECTION ===== */
.section-analysis { padding: 4rem 0 6rem; border-top: 1px solid var(--border); }

/* Loading */
.analysis-loading { text-align: center; padding: 4rem 0; }
.loading-animation {
  position: relative; width: 100px; height: 100px; margin: 0 auto 2rem;
}
.loading-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 3px solid transparent; border-top-color: var(--accent);
  animation: spin 1.2s linear infinite;
}
.ring-2 {
  inset: 12px; border-top-color: var(--accent2);
  animation-duration: 0.9s; animation-direction: reverse;
}
.ring-3 { inset: 24px; border-top-color: var(--accent3); animation-duration: 0.6s; }
@keyframes spin { to { transform: rotate(360deg); } }

.loading-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; }
.loading-desc { color: var(--text-secondary); margin-bottom: 2rem; }
.loading-steps { display: flex; flex-direction: column; gap: 0.5rem; max-width: 300px; margin: 0 auto; }
.loading-step {
  padding: 0.5rem 1rem; border-radius: 8px;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-muted); font-size: 0.85rem; transition: var(--transition);
}
.loading-step.active {
  color: var(--accent); border-color: rgba(79,156,249,0.3);
  background: rgba(79,156,249,0.08);
}
.loading-step.done { color: var(--accent3); border-color: rgba(52,211,153,0.3); }

/* Empty State */
.analysis-empty { text-align: center; padding: 4rem 0; }
.empty-icon { font-size: 4rem; margin-bottom: 1rem; opacity: 0.4; }
.analysis-empty h3 { font-size: 1.3rem; margin-bottom: 0.5rem; color: var(--text-secondary); }
.analysis-empty p { color: var(--text-muted); }

/* Verdict Card */
.verdict-card {
  background: var(--bg-card); border: 1px solid var(--border-glow);
  border-radius: var(--radius); padding: 2rem 2.5rem;
  margin-bottom: 2rem; box-shadow: var(--shadow-glow);
  transition: var(--transition);
}
.verdict-header { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.verdict-icon { font-size: 3rem; }
.verdict-content { flex: 1; }
.verdict-label { font-size: 0.8rem; color: var(--text-muted); font-family: var(--font-en); text-transform: uppercase; letter-spacing: 1px; }
.verdict-title { font-size: 1.7rem; font-weight: 800; margin: 0.3rem 0 0.6rem; }
.verdict-reason { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* Score Ring */
.verdict-score-ring { position: relative; width: 120px; height: 120px; flex-shrink: 0; }
.score-svg { width: 120px; height: 120px; transform: rotate(-90deg); }
.score-bg { fill: none; stroke: rgba(255,255,255,0.06); stroke-width: 8; }
.score-fill {
  fill: none; stroke-width: 8; stroke-linecap: round;
  transition: stroke-dashoffset 1.5s ease, stroke 0.5s ease;
}
.score-text {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  text-align: center;
}
.score-num { font-size: 2rem; font-weight: 800; font-family: var(--font-en); }
.score-unit { font-size: 0.7rem; color: var(--text-muted); font-family: var(--font-en); }

/* Results Grid */
.results-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-bottom: 1.2rem;
}
.result-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem; transition: var(--transition);
}
.result-card:hover { border-color: var(--border-glow); }
.result-card-header {
  display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem;
}
.result-icon { font-size: 1.3rem; }
.result-card-header h3 { font-size: 1rem; font-weight: 700; }
.card-strengths { border-top: 2px solid var(--accent3); }
.card-weaknesses { border-top: 2px solid var(--warning); }
.card-opportunities { border-top: 2px solid var(--accent); }
.card-risks { border-top: 2px solid var(--danger); }

.result-content { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.8; }
.result-content ul { padding-left: 1.2rem; }
.result-content li { margin-bottom: 0.4rem; }

/* Recommendations */
.recommendations-card, .canvas-feedback-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.8rem;
  margin-bottom: 1.2rem;
}
.rec-header, .cf-header {
  display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.2rem;
  border-bottom: 1px solid var(--border); padding-bottom: 0.8rem;
}
.rec-icon, .cf-icon { font-size: 1.3rem; }
.rec-header h3, .cf-header h3 { font-size: 1rem; font-weight: 700; }
.rec-content, .cf-content { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.9; }
.rec-content strong, .cf-content strong { color: var(--text-primary); }

/* Result Actions */
.result-actions {
  display: flex; gap: 1rem; justify-content: center; margin-top: 2rem; flex-wrap: wrap;
}

/* Error */
.analysis-error { text-align: center; padding: 4rem 0; }
.error-icon { font-size: 3rem; margin-bottom: 1rem; }
.error-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--danger); }
.error-msg { color: var(--text-secondary); margin-bottom: 1.5rem; }

/* ===== FOOTER ===== */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  padding: 2rem 0; text-align: center;
}
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.footer-desc { font-size: 0.9rem; color: var(--text-secondary); }
.footer-note { font-size: 0.8rem; color: var(--text-muted); }

/* ===== VERDICT COLORS ===== */
.verdict-good .verdict-title { color: var(--accent3); }
.verdict-good { border-color: rgba(52,211,153,0.3) !important; }
.verdict-warn .verdict-title { color: var(--warning); }
.verdict-warn { border-color: rgba(251,191,36,0.3) !important; }
.verdict-bad .verdict-title { color: var(--danger); }
.verdict-bad { border-color: rgba(248,113,113,0.3) !important; }

/* ===== PRINT ===== */
@media print {
  .navbar, .settings-panel, .analyze-cta, .result-actions, .section-canvas { display: none !important; }
  body { background: #fff; color: #000; }
  .verdict-card, .result-card, .recommendations-card, .canvas-feedback-card {
    border: 1px solid #ccc; box-shadow: none; break-inside: avoid;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .canvas-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: unset;
  }
  .card-partners, .card-activities, .card-value, .card-relationships,
  .card-segments, .card-resources, .card-channels, .card-cost, .card-revenue {
    grid-column: unset; grid-row: unset;
  }
  .card-value { grid-column: 1 / -1; }
  .card-cost { grid-column: 1 / -1; }
  .card-revenue { grid-column: 1 / -1; }
  .business-header-card { grid-template-columns: 1fr; }
  .results-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .canvas-grid { grid-template-columns: 1fr; }
  .hero { padding: 3rem 1rem 2rem; }
  .hero-stats { flex-direction: column; gap: 0.5rem; border-radius: var(--radius); padding: 1rem; }
  .stat-divider { width: 60px; height: 1px; }
  .navbar { padding: 1rem; }
  .container { padding: 0 1rem; }
  .verdict-score-ring { display: none; }
}