/* ══════════════════════════════════════════
   SAP Notes — Design System
   SAP Fiori "Horizon" Corporate Theme
   ══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* ── Color Palette (Dark Mode - Evening Horizon) ── */
  --bg-primary: #1C2228;
  --bg-secondary: #222B36;
  --bg-elevated: #293441;
  --bg-card: #222B36;
  
  --border-subtle: #394657;
  --border-default: #4A5B70;
  --border-active: #5B9AFF;

  /* Fiori Cobalt Blue Accent */
  --accent-blue: #5B9AFF;
  --accent-blue-hover: #7BAFFF;
  --accent-cyan: #1FBDBA;

  --text-primary: #FAFAFA;
  --text-secondary: #B1BCC9;
  --text-muted: #8493A8;

  /* ── Typography ── */
  /* Using Inter for a very clean, enterprise look similar to SAP 72 */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-code: 'JetBrains Mono', 'Fira Code', monospace;

  /* ── Transitions ── */
  --transition: all 0.2s ease-in-out;
  --ease-out: cubic-bezier(0.25, 0.8, 0.25, 1);

  /* ── Radius ── */
  /* Fiori Horizon uses subtle rounding */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Standard shadow for cards */
  --shadow-default: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
}

/* ══════════════════════════════════════════
   Light Theme (Morning Horizon)
   ══════════════════════════════════════════ */
[data-theme="light"] {
  --bg-primary: #F4F7F9;
  --bg-secondary: #FFFFFF;
  --bg-elevated: #F8FAFC;
  --bg-card: #FFFFFF;

  --border-subtle: #E4E9F0;
  --border-default: #D1D8E2;
  --border-active: #0070F2;

  --accent-blue: #0070F2;
  --accent-blue-hover: #0056B3;
  --accent-cyan: #0A8276;

  --text-primary: #1D2D3E;
  --text-secondary: #556B82;
  --text-muted: #72869C;

  --shadow-default: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-blue-hover);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ══════════════════════════════════════════
   Navigation (Header) - Fiori Style
   ══════════════════════════════════════════ */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.logo span {
  color: var(--accent-blue);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 0;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-blue);
  border-radius: 3px 3px 0 0;
}

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

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.lang-switch {
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.lang-switch:hover {
  border-color: var(--border-default);
  color: var(--text-primary);
}

/* ══════════════════════════════════════════
   Buttons
   ══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-blue);
  color: #FFFFFF;
}
.btn-primary:hover {
  background: var(--accent-blue-hover);
  color: #FFFFFF;
}

.btn-secondary {
  background: transparent;
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}
.btn-secondary:hover {
  background: rgba(91, 154, 255, 0.1);
}
[data-theme="light"] .btn-secondary:hover {
  background: rgba(0, 112, 242, 0.05);
}

.btn-text {
  background: transparent;
  color: var(--text-secondary);
}
.btn-text:hover {
  color: var(--accent-blue);
}

/* ══════════════════════════════════════════
   Corporate Hero Section (index.html)
   ══════════════════════════════════════════ */
.corporate-main {
  display: flex;
  flex-direction: column;
  padding-bottom: 80px;
}

.corporate-hero {
  padding: 80px 20px 40px 20px;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.corporate-hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.corporate-hero .hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 32px auto;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ══════════════════════════════════════════
   Corporate Tech Strip (Tags)
   ══════════════════════════════════════════ */
.corporate-tech-strip {
  margin: 0 auto 40px auto;
  text-align: center;
}

.strip-content {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  align-items: center;
}

.strip-content span {
  padding: 6px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 100px; /* Fiori pill shape for tags */
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.strip-content span:hover {
  background: var(--accent-blue);
  color: #FFFFFF;
  border-color: var(--accent-blue);
}

/* ══════════════════════════════════════════
   Corporate Features (Categories Grid)
   ══════════════════════════════════════════ */
.corporate-features {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.features-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
}
.features-header h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
}
.features-header a {
  font-size: 0.95rem;
  font-weight: 500;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.corp-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  box-shadow: var(--shadow-default);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.corp-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 4px; height: 100%;
  background: var(--accent-blue);
  opacity: 0;
  transition: var(--transition);
}
.corp-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-default);
  box-shadow: var(--shadow-hover);
}
.corp-card:hover::before {
  opacity: 1;
}

.corp-card .card-icon {
  font-size: 1.75rem;
  padding: 12px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.corp-card .card-content {
  display: flex;
  flex-direction: column;
}

.corp-card h3 {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.corp-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Fade in up animation */
.animate-fade-in-up {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ══════════════════════════════════════════
   Footer
   ══════════════════════════════════════════ */
footer {
  border-top: 1px solid var(--border-subtle);
  padding: 32px 0;
  text-align: center;
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ══════════════════════════════════════════
   Global Toast Notification
   ══════════════════════════════════════════ */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
}

.toast {
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateX(-100%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

/* ══════════════════════════════════════════
   Responsive
   ══════════════════════════════════════════ */

/* --- Hamburger button (hidden by default, shown on mobile) --- */
.hamburger-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.hamburger-menu-btn:hover {
  background: var(--bg-elevated);
}

.hamburger-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile nav drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 260px;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  z-index: 2000;
  padding: 80px 24px 32px;
  transition: right 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
}

.mobile-nav-drawer.open {
  right: 0;
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1999;
  backdrop-filter: blur(2px);
}

.mobile-nav-overlay.active {
  display: block;
}

.mobile-nav-drawer .nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-drawer .nav-links a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.mobile-nav-drawer .nav-links a:hover,
.mobile-nav-drawer .nav-links a.active {
  color: var(--accent-blue);
  background: rgba(91, 154, 255, 0.08);
}

.mobile-nav-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hamburger-menu-btn {
    display: flex;
  }

  .corporate-hero h1 {
    font-size: 2rem;
  }

  .corporate-hero .hero-subtitle {
    font-size: 0.95rem;
  }

  .mobile-nav-drawer {
    display: block;
  }

  /* Hero section padding */
  .corporate-hero {
    padding: 80px 0 60px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .hero-cta .btn {
    text-align: center;
    justify-content: center;
  }

  /* Feature cards */
  .features-grid {
    grid-template-columns: 1fr;
  }

  /* Container padding */
  .container {
    padding: 0 16px;
  }
}