/* ==========================================================================
   PawPlay AI - Design System & Modern Styling
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  /* Primary Color Palette */
  --bg-dark: #0f1423;
  --bg-card: rgba(22, 29, 49, 0.75);
  --bg-card-border: rgba(255, 255, 255, 0.1);
  --bg-card-hover: rgba(30, 39, 66, 0.85);

  /* Pet Theme Accents */
  --dog-color: #ff7b00;
  --dog-glow: rgba(255, 123, 0, 0.35);
  --dog-gradient: linear-gradient(135deg, #ff9e00, #e65c00);

  --cat-color: #a855f7;
  --cat-glow: rgba(168, 85, 247, 0.35);
  --cat-gradient: linear-gradient(135deg, #c084fc, #7e22ce);

  --ai-cyan: #06b6d4;
  --ai-glow: rgba(6, 182, 212, 0.4);
  --ai-gradient: linear-gradient(135deg, #22d3ee, #0284c7);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* Layout Constants */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --shadow-main: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(255, 123, 0, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 60%, rgba(168, 85, 247, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 90%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
}

.container {
  width: 90%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 20%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-ai {
  background: linear-gradient(135deg, #38bdf8 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--bg-card-border);
  backdrop-filter: blur(10px);
}

.badge-ai {
  color: var(--ai-cyan);
  border-color: rgba(6, 182, 212, 0.3);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--ai-gradient);
  color: #fff;
  box-shadow: 0 10px 25px -5px rgba(6, 182, 212, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -5px rgba(6, 182, 212, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--bg-card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.btn-dog {
  background: var(--dog-gradient);
  color: #fff;
  box-shadow: 0 10px 20px -5px rgba(255, 123, 0, 0.4);
}

.btn-cat {
  background: var(--cat-gradient);
  color: #fff;
  box-shadow: 0 10px 20px -5px rgba(168, 85, 247, 0.4);
}

/* Header Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 20, 35, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--bg-card-border);
  padding: 1rem 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-main);
}

.nav-logo span.highlight {
  color: var(--dog-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--text-main);
}

/* Hero Section */
.hero {
  padding: 5rem 0 3rem;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  margin: 1.2rem 0;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2.2rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Quick Features Counter Bar */
.hero-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 4rem;
}

.feature-pill {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: left;
  transition: var(--transition);
}

.feature-pill:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.icon-dog { background: rgba(255, 123, 0, 0.15); color: var(--dog-color); }
.icon-cat { background: rgba(168, 85, 247, 0.15); color: var(--cat-color); }
.icon-ai { background: rgba(6, 182, 212, 0.15); color: var(--ai-cyan); }

/* Main Section Title Styling */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-top: 0.5rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-top: 0.5rem;
}

/* ==========================================================================
   AI SCANNER SECTION (TEACHABLE MACHINE)
   ========================================================================== */
.scanner-section {
  padding: 4rem 0;
}

.scanner-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  padding: 2.5rem;
  box-shadow: var(--shadow-main);
  position: relative;
  overflow: hidden;
}

.scanner-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--dog-color), var(--ai-cyan), var(--cat-color));
}

/* Tab Switcher */
.scanner-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.4rem;
  border-radius: var(--radius-full);
  max-width: 380px;
  margin: 0 auto 2rem;
  border: 1px solid var(--bg-card-border);
}

.tab-btn {
  flex: 1;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.tab-btn.active {
  background: var(--ai-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

/* Scanner Grid Layout */
.scanner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

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

/* Media Box (Webcam or Upload) */
.media-container {
  background: rgba(10, 14, 26, 0.8);
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  aspect-ratio: 4 / 3;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: var(--transition);
}

.media-container.drag-over {
  border-color: var(--ai-cyan);
  background: rgba(6, 182, 212, 0.08);
}

.webcam-wrapper, .upload-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Hidden by default until activated */
.hidden {
  display: none !important;
}

#webcam-container canvas, #webcam-container video {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover;
  border-radius: var(--radius-md);
}

#preview-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.upload-dropzone {
  text-align: center;
  padding: 2rem;
  cursor: pointer;
}

.upload-dropzone i {
  font-size: 3rem;
  color: var(--ai-cyan);
  margin-bottom: 1rem;
}

.upload-dropzone p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.upload-dropzone span.browse-link {
  color: var(--ai-cyan);
  text-decoration: underline;
  font-weight: 700;
}

#file-input {
  display: none;
}

/* Scanner Overlay Animations */
.scan-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--ai-cyan), transparent);
  box-shadow: 0 0 15px var(--ai-cyan);
  animation: scan 2.5s infinite linear;
  opacity: 0;
  z-index: 10;
}

.scanning .scan-line {
  opacity: 1;
}

@keyframes scan {
  0% { top: 0%; }
  50% { top: 100%; }
  100% { top: 0%; }
}

.controls-bar {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

/* Prediction Results Box */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.model-status-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--bg-card-border);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-dim);
}

.dot.loading {
  background: var(--warning);
  animation: pulse 1.2s infinite;
}

.dot.ready {
  background: var(--success);
  box-shadow: 0 0 10px var(--success);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.prediction-bars {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.prediction-item {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--bg-card-border);
  padding: 1rem;
  border-radius: var(--radius-md);
}

.prediction-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-weight: 700;
  font-size: 0.95rem;
}

.prediction-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.label-dog { color: var(--dog-color); }
.label-cat { color: var(--cat-color); }

.bar-outer {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.bar-inner {
  height: 100%;
  width: 0%;
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

.bar-inner.dog { background: var(--dog-gradient); box-shadow: 0 0 10px var(--dog-glow); }
.bar-inner.cat { background: var(--cat-gradient); box-shadow: 0 0 10px var(--cat-glow); }

/* Analysis Insight Box */
.analysis-box {
  background: rgba(6, 182, 212, 0.06);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.analysis-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ai-cyan);
  font-size: 1.05rem;
  font-weight: 700;
}

.analysis-body {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   EDUCATIONAL COMPARISON SECTION
   ========================================================================== */
.comparison-section {
  padding: 5rem 0;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.diff-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
}

.diff-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-main);
}

.diff-card-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
}

.diff-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
}

.diff-detail {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.diff-pill {
  padding: 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

.diff-pill.dog-aspect {
  background: rgba(255, 123, 0, 0.08);
  border-left: 3px solid var(--dog-color);
}

.diff-pill.cat-aspect {
  background: rgba(168, 85, 247, 0.08);
  border-left: 3px solid var(--cat-color);
}

.diff-pill strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.diff-pill.dog-aspect strong { color: var(--dog-color); }
.diff-pill.cat-aspect strong { color: var(--cat-color); }

/* Comparison Matrix Table */
.matrix-container {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  overflow-x: auto;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 650px;
}

.matrix-table th, .matrix-table td {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.matrix-table th {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.2);
}

.matrix-table th.col-dog { color: var(--dog-color); }
.matrix-table th.col-cat { color: var(--cat-color); }

.matrix-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.matrix-table td strong {
  color: var(--text-main);
  display: block;
}

.matrix-table td span.tag {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 0.4rem;
}

.tag-dog { background: rgba(255, 123, 0, 0.2); color: #ffb703; }
.tag-cat { background: rgba(168, 85, 247, 0.2); color: #e9d5ff; }

/* ==========================================================================
   SAFETY & WARNINGS SECTION
   ========================================================================== */
.safety-section {
  padding: 4rem 0;
  background: linear-gradient(180deg, transparent, rgba(239, 68, 68, 0.03), transparent);
}

.safety-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .safety-grid { grid-template-columns: 1fr; }
}

.safety-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--bg-card-border);
}

.safety-card.danger-card {
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.04);
}

.safety-card.warning-card {
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.04);
}

.safety-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.danger-card h3 { color: var(--danger); }
.warning-card h3 { color: var(--warning); }

.safety-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.safety-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.safety-list li i {
  margin-top: 0.25rem;
  flex-shrink: 0;
}

/* ==========================================================================
   FAQ SECTION (ACCORDION)
   ========================================================================== */
.faq-section {
  padding: 5rem 0;
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-header {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.05rem;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-header i {
  transition: transform 0.3s ease;
  color: var(--ai-cyan);
}

.faq-item.active .faq-header i {
  transform: rotate(180deg);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-body {
  max-height: 300px;
  padding: 0 1.5rem 1.5rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--bg-card-border);
  background: rgba(10, 14, 26, 0.95);
  padding: 3rem 0 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--ai-cyan);
}

/* Utility Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}