/* ==========================================================================
   OPTIMUS AI SOLUTIONS SRL - Main Stylesheet
   Design System: Modern Glassmorphism & High-Aesthetic UI
   ========================================================================== */

/* Theme Color Tokens */
:root {
  /* Default Dark Mode Palette */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent: #10b981;          /* Emerald accent for hunting/nature vibe */
  --accent-glow: rgba(16, 185, 129, 0.3);
  --accent-hover: #059669;
  
  --primary-brand: #3b82f6;   /* Tech Blue */
  --primary-glow: rgba(59, 130, 246, 0.25);
  
  --card-bg: rgba(15, 23, 42, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --glass-bg: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(255, 255, 255, 0.12);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  
  --accent: #059669;
  --accent-glow: rgba(5, 150, 105, 0.2);
  --accent-hover: #047857;
  
  --primary-brand: #2563eb;
  --primary-glow: rgba(37, 99, 235, 0.2);
  
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(0, 0, 0, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.1);
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, var(--bg-secondary) 0%, var(--bg-primary) 70%);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Glassmorphism Panel Utility */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 24px -10px var(--accent-glow);
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  padding: 16px 0;
  transition: var(--transition);
}

[data-theme="light"] .site-header {
  background: rgba(248, 250, 252, 0.85);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary-brand) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px var(--accent-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: linear-gradient(135deg, #fff 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .brand-name {
  background: linear-gradient(135deg, #0f172a 0%, #334155 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons & Controls */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--card-border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(16, 185, 129, 0.05);
}

.btn-icon-text {
  background: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--card-border);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-icon-text:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-icon:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Theme Icons state */
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* Hero Section */
.hero-section {
  padding: 90px 0 70px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
}

.glow-badge {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 36px;
  max-width: 540px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero App Mockup Visual */
.app-mockup-card {
  padding: 24px;
  border: 1px solid rgba(16, 185, 129, 0.3);
  position: relative;
  overflow: hidden;
}

.app-mockup-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200px;
  height: 200px;
  background: var(--accent-glow);
  filter: blur(80px);
  pointer-events: none;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 24px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.mockup-title {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-left: 8px;
  font-weight: 500;
}

.mockup-body {
  text-align: center;
}

.mockup-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.live-pulse {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.mockup-app-icon {
  width: 80px;
  height: 80px;
  background: var(--bg-tertiary);
  border: 2px solid var(--accent);
  border-radius: var(--radius-md);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px var(--accent-glow);
}

.mockup-app-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.mockup-app-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.mockup-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background: var(--bg-primary);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent);
}

.stat-lbl {
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* Common Section Layout */
.section {
  padding: 80px 0;
}

.section-header {
  margin-bottom: 50px;
}

.section-header.center {
  text-align: center;
}

.section-subtitle {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-top: 8px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-top: 12px;
}

.title-bar {
  width: 60px;
  height: 4px;
  background: var(--accent);
  border-radius: var(--radius-full);
  margin: 16px auto 0;
}

/* About Cards */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card-icon {
  width: 54px;
  height: 54px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.glass-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

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

/* Examen Vanator Article Showcase */
.article-wrapper {
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.category-tag {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.article-title {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 12px;
}

.article-meta {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--card-border);
}

.lead-text {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-main);
  margin-bottom: 28px;
}

.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--accent);
}

.article-content p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.features-grid-inline {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 32px 0;
}

.feature-box {
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  padding: 24px;
  border-radius: var(--radius-md);
}

.f-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.feature-box h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-box p {
  font-size: 0.88rem;
  margin-bottom: 0;
}

.styled-list {
  list-style: none;
  margin-top: 16px;
}

.styled-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.styled-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 800;
}

/* Quiz Interactive Demo */
.quiz-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 36px;
}

.quiz-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 24px;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--primary-brand) 100%);
  transition: width 0.4s ease;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.quiz-step {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.quiz-badge {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-brand);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.quiz-question {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.4;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;

}

.option-btn {
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  text-align: left;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 12px;
}

.option-btn:hover {
  border-color: var(--accent);
  background: rgba(16, 185, 129, 0.05);
}

.option-btn.correct {
  background: rgba(16, 185, 129, 0.2) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
}

.option-btn.wrong {
  background: rgba(239, 68, 68, 0.2) !important;
  border-color: #ef4444 !important;
  color: #fff !important;
}

.quiz-footer {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.quiz-feedback {
  font-size: 0.95rem;
  font-weight: 600;
}

.quiz-feedback.success { color: var(--accent); }
.quiz-feedback.error { color: #ef4444; }

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  position: relative;
}

.f-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.3;
  margin-bottom: 12px;
}

/* Contact Section */
.contact-card {
  padding: 48px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.info-list {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.info-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.info-item div {
  display: flex;
  flex-direction: column;
}

.info-item strong {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.info-item a, .info-item span {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
}

.info-item a:hover {
  color: var(--accent);
}

.contact-form {
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  padding: 32px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-form h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 40px 0;
  margin-top: 60px;
  background: var(--bg-secondary);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand .brand-name {
  font-size: 1rem;
  margin-bottom: 4px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

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

/* Modal Overlay & Dialogs */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-content {
  max-width: 650px;
  width: 100%;
  max-height: 80vh;
  position: relative;
  padding: 36px;
  display: flex;
  flex-direction: column;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--card-border);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.modal-scroll-body {
  overflow-y: auto;
  padding-right: 12px;
  color: var(--text-muted);
  font-size: 0.92rem;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid,
  .about-grid,
  .features-grid,
  .contact-grid,
  .features-grid-inline {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .article-wrapper, .contact-card {
    padding: 28px;
  }
  
  .nav-menu {
    display: none; /* Can be expanded if hamburger added */
  }
}