/* OnlineCloudSec - Light Theme Styles */
/* Design system matching taise.guru (light variant) */

/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* Shared Brand Colors (matching taise.guru) */
  --primary: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --accent: #06b6d4;

  /* TAISE Gold */
  --taise-gold: #c8a03e;
  --taise-gold-light: #d4af37;
  --taise-gold-dark: #b8860b;

  /* Light Theme */
  --bg-white: #ffffff;
  --bg-light: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-muted: #e2e8f0;

  /* Text */
  --text-dark: #1e293b;
  --text-medium: #475569;
  --text-light: #64748b;

  /* Borders */
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Spacing */
  --nav-height: 4rem;
}

/* ============================================
   Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 1rem 0;
  color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin: 0 0 1rem 0;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--primary-light);
}

img {
  max-width: 100%;
  height: auto;
}

/* ============================================
   Layout
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: var(--bg-light);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: box-shadow 0.2s ease;
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-logo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--primary-dark);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-medium);
  font-weight: 500;
  font-size: 0.938rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--taise-gold);
  color: white !important;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  transition: background 0.2s ease;
}

.nav-cta:hover {
  background: var(--taise-gold-dark);
  color: white !important;
}

/* Mobile menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  transition: all 0.2s ease;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-white);
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    padding: 0.75rem 0;
  }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding-top: calc(var(--nav-height) + 4rem);
  padding-bottom: 4rem;
  background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-medium);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
}

.hero-image img {
  width: 320px;
  height: 320px;
  object-fit: cover;
  object-position: top;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2.25rem;
  }

  .hero-description {
    max-width: 100%;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-image img {
    width: 240px;
    height: 240px;
  }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: white;
}

.btn-gold {
  background: var(--taise-gold);
  color: white;
}

.btn-gold:hover {
  background: var(--taise-gold-dark);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-description {
  color: var(--text-light);
  font-size: 0.938rem;
  margin: 0;
}

/* ============================================
   Credentials Grid
   ============================================ */
.credentials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 992px) {
  .credentials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .credentials-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Speaking Events
   ============================================ */
.events-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.event-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.event-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.event-date {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--bg-light);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0.25rem;
  margin-bottom: 1rem;
}

.event-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.event-location {
  color: var(--text-light);
  font-size: 0.938rem;
  margin-bottom: 0.5rem;
}

.event-topic {
  color: var(--text-medium);
  font-size: 0.938rem;
}

@media (max-width: 992px) {
  .events-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .events-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Testimonials
   ============================================ */
.testimonials-container {
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
}

.testimonial-quote {
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text-medium);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.testimonial-quote::before {
  content: '"';
  font-size: 3rem;
  color: var(--primary-light);
  display: block;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.testimonial-quote::after {
  content: '"';
  font-size: 1.5rem;
  color: var(--primary-light);
}

.testimonial-author {
  font-weight: 600;
  color: var(--text-dark);
}

.testimonial-role {
  color: var(--text-light);
  font-size: 0.938rem;
}

/* Testimonial navigation */
.testimonial-nav {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.testimonial-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-medium);
  border: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

.testimonial-dot.active {
  background: var(--primary);
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--text-light);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-light);
  border-top: 1px solid var(--border-light);
  padding: 3rem 0 2rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary);
}

.footer-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--text-medium);
  font-size: 0.938rem;
  transition: color 0.2s ease;
}

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

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 0.5rem;
  color: var(--text-medium);
  transition: all 0.2s ease;
}

.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.footer-bottom {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  color: var(--text-light);
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ============================================
   Page Content
   ============================================ */
.page-header {
  padding-top: calc(var(--nav-height) + 3rem);
  padding-bottom: 3rem;
  background: var(--bg-light);
  text-align: center;
}

.page-header h1 {
  color: var(--primary-dark);
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--text-medium);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

.page-content {
  padding: 4rem 0;
}

/* ============================================
   About Page
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  align-items: start;
}

.about-image img {
  width: 100%;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  object-position: top;
}

.about-content h2 {
  color: var(--primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.about-content h2:first-child {
  margin-top: 0;
}

.about-content ul {
  color: var(--text-medium);
  padding-left: 1.5rem;
}

.about-content li {
  margin-bottom: 0.5rem;
}

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

  .about-image {
    text-align: center;
  }

  .about-image img {
    max-width: 280px;
  }
}

/* ============================================
   Contact Form
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-medium);
}

.contact-methods {
  margin-top: 2rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--text-medium);
}

.contact-method svg {
  color: var(--primary);
}

.contact-form {
  background: var(--bg-light);
  padding: 2rem;
  border-radius: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1px solid var(--border-medium);
  border-radius: 0.5rem;
  background: var(--bg-white);
  color: var(--text-dark);
  transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

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

/* ============================================
   TAISE Page
   ============================================ */
.taise-hero {
  background: linear-gradient(135deg, var(--taise-gold-dark) 0%, var(--taise-gold) 100%);
  color: white;
  padding-top: calc(var(--nav-height) + 4rem);
  padding-bottom: 4rem;
  text-align: center;
}

.taise-hero h1 {
  color: white;
  font-size: 2.5rem;
}

.taise-hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto 2rem;
}

.taise-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.taise-feature {
  background: rgba(255,255,255,0.1);
  padding: 1.5rem;
  border-radius: 0.75rem;
  text-align: center;
}

.taise-feature h3 {
  color: white;
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.taise-feature p {
  font-size: 0.938rem;
  margin: 0;
  opacity: 0.9;
}

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

/* ============================================
   Cloud Security Pages
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.service-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.2s ease;
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.service-card h3 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.service-card p {
  color: var(--text-medium);
  margin-bottom: 1rem;
}

.service-card ul {
  color: var(--text-medium);
  padding-left: 1.25rem;
  margin: 0;
}

.service-card li {
  margin-bottom: 0.5rem;
}

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

/* ============================================
   Publications / Lectures / Classes Lists
   ============================================ */
.list-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  transition: all 0.2s ease;
}

.list-item:hover {
  box-shadow: var(--shadow-md);
}

.list-item-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  border-radius: 0.5rem;
  color: var(--primary);
}

.list-item-content {
  flex: 1;
}

.list-item-title {
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.list-item-meta {
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.list-item-description {
  color: var(--text-medium);
  font-size: 0.938rem;
  margin: 0;
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-light);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ============================================
   Utilities
   ============================================ */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-gold { color: var(--taise-gold); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ============================================
   Icons (SVG inline)
   ============================================ */
.icon {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.icon-sm {
  width: 18px;
  height: 18px;
}

.icon-lg {
  width: 32px;
  height: 32px;
}