/**
 * Skilleze Technologies — Modern Design System (CSS3)
 * Crafted for high-impact aesthetics, conversion focus, and lightning performance.
 * Preserves brand identity: Gold (#FDD42A), Cyan (#02C5FB), Magenta (#E4007C).
 */

/* ==========================================================================
   1. CSS Custom Properties & Design Tokens
   ========================================================================== */
:root {
  /* Brand Core Accents */
  --gold-400: #FDD42A;
  --gold-500: #F3B700;
  --gold-300: #FFE566;
  --gold-900: #7A5200;
  --gold-text: #FDD42A;
  --gold-glow: rgba(253, 212, 42, 0.28);
  --gold-subtle: rgba(253, 212, 42, 0.12);

  --cyan-500: #02C5FB;
  --cyan-400: #38D4FC;
  --cyan-600: #00A3D4;
  --cyan-glow: rgba(2, 197, 251, 0.28);
  --cyan-subtle: rgba(2, 197, 251, 0.12);

  --magenta-500: #E4007C;
  --magenta-400: #F52796;
  --magenta-glow: rgba(228, 0, 124, 0.28);
  --magenta-subtle: rgba(228, 0, 124, 0.12);

  --emerald-500: #10B981;
  --emerald-400: #34D399;
  --whatsapp-green: #25D366;
  --whatsapp-dark: #075E54;
  --whatsapp-teal: #128C7E;

  /* Sophisticated Dark Mode Surface Hierarchy */
  --surface-950: #08090C; /* Deepest canvas */
  --surface-900: #0F1117; /* Card / Panel surface */
  --surface-850: #151821; /* Elevated card surface */
  --surface-800: #1B1F2C; /* Input & Hover surface */
  --surface-700: #262B3D; /* Highlighted container */

  /* Lines & Borders */
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-gold: rgba(253, 212, 42, 0.35);
  --line-cyan: rgba(2, 197, 251, 0.35);
  --line-magenta: rgba(228, 0, 124, 0.35);

  /* Typography Colors */
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-dim: #64748B;

  /* Shadows & Depth */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px -8px rgba(0, 0, 0, 0.65);
  --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.07);
  --shadow-card-hover: 0 20px 40px -10px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(253, 212, 42, 0.3);
  --shadow-glowGold: 0 0 30px rgba(253, 212, 42, 0.28);
  --shadow-glowCyan: 0 0 30px rgba(2, 197, 251, 0.28);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 180ms;
  --duration-normal: 280ms;
  --duration-slow: 450ms;
}

/* Light Mode Overrides (if toggled) */
.light {
  --surface-950: #FFFFFF;
  --surface-900: #F8FAFC;
  --surface-850: #F1F5F9;
  --surface-800: #E2E8F0;
  --surface-700: #CBD5E1;
  --line: #E2E8F0;
  --line-strong: #CBD5E1;
  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #64748B;
  --gold-text: #B45309;
}

/* ==========================================================================
   2. Global Resets & Typography Refinement
   ========================================================================== */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  background-color: var(--surface-950);
  color: var(--text-primary);
  font-family: var(--font-body, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  line-height: 1.65;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  position: relative;
}

/* Subtle background ambient mesh glow */
body::before {
  content: '';
  position: fixed;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 450px;
  background: radial-gradient(ellipse at center, rgba(2, 197, 251, 0.08) 0%, rgba(253, 212, 42, 0.05) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading, 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif);
  color: var(--text-primary);
  letter-spacing: -0.025em;
  font-weight: 700;
  line-height: 1.22;
  margin-top: 0;
  text-wrap: balance;
}

p {
  color: var(--text-secondary);
  line-height: 1.68;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-smooth);
}

::selection {
  background: var(--gold-400);
  color: #08090C;
}

/* ==========================================================================
   3. Header, Navigation & Mega Menu Refinements
   ========================================================================== */
/* Top Site Navigation Bar only */
header.sticky,
body > div > header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(8, 9, 12, 0.82) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--line) !important;
  transition: background-color var(--duration-normal) var(--ease-smooth), border-color var(--duration-normal) var(--ease-smooth);
}

header.sticky.scrolled,
body > div > header.scrolled {
  background-color: rgba(8, 9, 12, 0.94) !important;
  border-bottom-color: var(--line-strong) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Inner page content headers MUST be static */
main header,
article header,
section header,
div.max-w-7xl header {
  position: static !important;
  background: transparent !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  border: none !important;
  box-shadow: none !important;
}

/* Header link styling */
header.sticky nav a,
body > div > header nav a {
  position: relative;
  transition: color var(--duration-fast) var(--ease-smooth);
}

header.sticky nav a:hover,
body > div > header nav a:hover {
  color: var(--gold-text) !important;
}

/* Mega-Menu Styling */
header.sticky .group > .group-hover\:grid,
body > div > header .group > .group-hover\:grid {
  display: none;
}

header.sticky .group:hover > .group-hover\:grid,
body > div > header .group:hover > .group-hover\:grid {
  display: grid !important;
  animation: megaMenuFadeIn 0.24s var(--ease-spring);
  transform-origin: top center;
  background: rgba(15, 17, 23, 0.96) !important;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--line-strong) !important;
  box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.75), 0 0 0 1px rgba(255, 255, 255, 0.08) !important;
}

@keyframes megaMenuFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Mega Menu Item Hover */
header .group-hover\:grid a {
  transition: all var(--duration-fast) var(--ease-smooth);
  border: 1px solid transparent;
}

header .group-hover\:grid a:hover {
  background: var(--surface-800) !important;
  border-color: rgba(253, 212, 42, 0.2);
  transform: translateX(3px);
}

/* Mobile Menu Drawer */
#mobile-menu {
  background: rgba(15, 17, 23, 0.98) !important;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--line-strong) !important;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  animation: slideDown 0.22s var(--ease-spring);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   4. Buttons & Interactive Controls
   ========================================================================== */
.btn,
button.inline-flex,
a.inline-flex {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading, 'Plus Jakarta Sans', sans-serif);
  font-weight: 700;
  border-radius: var(--radius-full);
  padding: 0.75rem 1.6rem;
  font-size: 0.9375rem;
  cursor: pointer;
  outline: none;
  border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--ease-spring),
              box-shadow var(--duration-fast) var(--ease-smooth),
              background-color var(--duration-fast) var(--ease-smooth),
              border-color var(--duration-fast) var(--ease-smooth),
              color var(--duration-fast) var(--ease-smooth);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active,
button.inline-flex:active,
a.inline-flex:active {
  transform: scale(0.97) !important;
}

/* Primary Button (Gold High Impact) */
.btn-primary,
button.bg-\[var\(--gold-400\)\],
a.bg-\[var\(--gold-400\)\] {
  background: linear-gradient(135deg, var(--gold-400) 0%, var(--gold-500) 100%) !important;
  color: #07080A !important;
  font-weight: 700;
  border: 1px solid rgba(253, 212, 42, 0.6) !important;
  box-shadow: 0 4px 16px rgba(253, 212, 42, 0.22);
}

.btn-primary:hover,
button.bg-\[var\(--gold-400\)\]:hover,
a.bg-\[var\(--gold-400\)\]:hover {
  background: linear-gradient(135deg, #FFE566 0%, var(--gold-400) 100%) !important;
  box-shadow: 0 6px 24px rgba(253, 212, 42, 0.45) !important;
  transform: translateY(-2px);
}

/* Secondary Button (Cyan) */
.btn-cyan,
button.border-\[var\(--cyan-500\)\],
a.border-\[var\(--cyan-500\)\] {
  background: rgba(2, 197, 251, 0.08) !important;
  color: var(--cyan-400) !important;
  border: 1.5px solid var(--cyan-500) !important;
  box-shadow: 0 4px 16px rgba(2, 197, 251, 0.15);
}

.btn-cyan:hover,
button.border-\[var\(--cyan-500\)\]:hover,
a.border-\[var\(--cyan-500\)\]:hover {
  background: var(--cyan-500) !important;
  color: #07080A !important;
  box-shadow: 0 6px 24px rgba(2, 197, 251, 0.4) !important;
  transform: translateY(-2px);
}

/* Dark Surface Button / Ghost Button */
.btn-surface,
button.bg-\[var\(--surface-800\)\],
a.bg-\[var\(--surface-800\)\] {
  background: var(--surface-850) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--line-strong) !important;
}

.btn-surface:hover,
button.bg-\[var\(--surface-800\)\]:hover,
a.bg-\[var\(--surface-800\)\]:hover {
  background: var(--surface-800) !important;
  border-color: var(--gold-400) !important;
  color: var(--gold-text) !important;
  transform: translateY(-2px);
}

/* WhatsApp Action Button */
.btn-whatsapp,
a[href*="wa.me"] {
  background: linear-gradient(135deg, var(--whatsapp-dark) 0%, var(--whatsapp-teal) 100%) !important;
  color: #FFFFFF !important;
  border: 1px solid rgba(37, 211, 102, 0.4) !important;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.25);
  font-weight: 700;
}

a[href*="wa.me"]:hover {
  background: linear-gradient(135deg, var(--whatsapp-teal) 0%, var(--whatsapp-green) 100%) !important;
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.45) !important;
  transform: translateY(-2px);
}

/* ==========================================================================
   5. Cards, Elevation & Glassmorphism
   ========================================================================== */
.card,
.glass-panel,
.bg-\[var\(--surface-900\)\] {
  background-color: var(--surface-900) !important;
  border-color: var(--line) !important;
  transition: transform var(--duration-normal) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-smooth),
              border-color var(--duration-normal) var(--ease-smooth);
}

/* Card hover lift & glow */
.group:hover .group-hover\:scale-\[1\.02\],
div.rounded-3xl.bg-\[var\(--surface-900\)\]:hover,
div.rounded-2xl.bg-\[var\(--surface-900\)\]:hover {
  border-color: rgba(253, 212, 42, 0.35);
  box-shadow: var(--shadow-card-hover);
}

/* Special hover for cyan bordered cards */
div.border-2.border-\[var\(--cyan-500\)\]\/60:hover {
  border-color: var(--cyan-400) !important;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.7), 0 0 30px rgba(2, 197, 251, 0.25) !important;
}

/* Special hover for gold bordered cards */
div.border-2.border-\[var\(--gold-400\)\]\/60:hover {
  border-color: var(--gold-400) !important;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.7), 0 0 30px rgba(253, 212, 42, 0.25) !important;
}

/* ==========================================================================
   6. Badges & Entity Labels
   ========================================================================== */
.badge,
span.inline-flex.rounded-full,
div.inline-flex.rounded-full {
  letter-spacing: 0.04em;
  font-weight: 700;
  transition: all var(--duration-fast) var(--ease-smooth);
}

/* Gold Pill Accent */
span.text-\[var\(--gold-text\)\],
div.text-\[var\(--gold-text\)\] {
  color: var(--gold-text) !important;
}

/* Cyan Pill Accent */
span.text-\[var\(--cyan-500\)\],
div.text-\[var\(--cyan-500\)\] {
  color: var(--cyan-400) !important;
}

/* Tech stack small tags */
span.bg-\[var\(--surface-800\)\] {
  background-color: var(--surface-850) !important;
  border-color: var(--line) !important;
  transition: all var(--duration-fast) var(--ease-smooth);
}

span.bg-\[var\(--surface-800\)\]:hover {
  border-color: var(--cyan-500) !important;
  color: #FFFFFF !important;
}

/* ==========================================================================
   7. Form Controls & Inputs
   ========================================================================== */
input, select, textarea {
  background-color: var(--surface-850) !important;
  border: 1px solid var(--line-strong) !important;
  color: var(--text-primary) !important;
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  transition: border-color var(--duration-fast) var(--ease-smooth),
              box-shadow var(--duration-fast) var(--ease-smooth);
}

input:focus, select:focus, textarea:focus {
  outline: none !important;
  border-color: var(--cyan-500) !important;
  box-shadow: 0 0 0 3px rgba(2, 197, 251, 0.2) !important;
}

input::placeholder, textarea::placeholder {
  color: var(--text-dim) !important;
}

/* ==========================================================================
   8. Tables & Data Display
   ========================================================================== */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}

th {
  background-color: var(--surface-850) !important;
  color: var(--gold-text) !important;
  font-family: var(--font-heading, sans-serif);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   9. Accordions & Disclosure Elements
   ========================================================================== */
details {
  border: 1px solid var(--line) !important;
  border-radius: var(--radius-lg);
  background-color: var(--surface-900) !important;
  transition: border-color var(--duration-fast) var(--ease-smooth),
              background-color var(--duration-fast) var(--ease-smooth);
  margin-bottom: 0.75rem;
}

details[open] {
  border-color: rgba(253, 212, 42, 0.4) !important;
  background-color: var(--surface-850) !important;
}

summary {
  cursor: pointer;
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-family: var(--font-heading, sans-serif);
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

summary::-webkit-details-marker {
  display: none;
}

/* ==========================================================================
   10. Call to Action Banners & Highlight Sections
   ========================================================================== */
section.bg-gradient-to-br,
.cta-banner {
  background: radial-gradient(circle at 50% 0%, rgba(253, 212, 42, 0.08) 0%, transparent 60%),
              linear-gradient(135deg, var(--surface-900) 0%, var(--surface-950) 100%) !important;
  border: 1px solid var(--line-gold) !important;
  box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.7), var(--shadow-glowGold) !important;
}

/* ==========================================================================
   11. Floating WhatsApp & Quick Conversion Widget
   ========================================================================== */
.floating-whatsapp-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #075E54 0%, #128C7E 50%, #25D366 100%);
  color: #FFFFFF !important;
  font-family: var(--font-heading, 'Plus Jakarta Sans', sans-serif);
  font-size: 0.875rem;
  font-weight: 700;
  box-shadow: 0 10px 28px rgba(37, 211, 102, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.2);
  transition: all var(--duration-fast) var(--ease-spring);
  text-decoration: none;
}

.floating-whatsapp-widget:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 34px rgba(37, 211, 102, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.floating-whatsapp-widget svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Floating Back to Top button */
.back-to-top-btn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--surface-850);
  border: 1px solid var(--line-strong);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-fast) var(--ease-smooth);
  cursor: pointer;
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top-btn:hover {
  border-color: var(--gold-400);
  color: var(--gold-text);
  transform: translateY(-2px);
}

/* ==========================================================================
   12. Mobile & Responsive Refinements
   ========================================================================== */
@media (max-width: 640px) {
  .floating-whatsapp-widget span {
    display: none;
  }
  .floating-whatsapp-widget {
    padding: 12px;
    bottom: 20px;
    right: 20px;
    border-radius: var(--radius-full);
  }
  .back-to-top-btn {
    bottom: 20px;
    left: 20px;
    width: 40px;
    height: 40px;
  }
  h1 {
    font-size: 2.1rem !important;
    line-height: 1.2 !important;
  }
  h2 {
    font-size: 1.65rem !important;
    line-height: 1.25 !important;
  }
}

/* ==========================================================================
   13. Location Map Frame Styling
   ========================================================================== */
.map-embed-wrapper {
  width: 100% !important;
  height: 480px !important;
  min-height: 420px !important;
  border-radius: 1rem !important;
  overflow: hidden !important;
  position: relative !important;
  background-color: var(--surface-950) !important;
}

.map-embed-frame {
  width: 100% !important;
  height: 100% !important;
  min-height: 420px !important;
  border: 0 !important;
  display: block !important;
}

/* ==========================================================================
   Navigation Hover Dropdown Mega Menus
   ========================================================================== */
.nav-dropdown {
  position: absolute;
  top: 90%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s cubic-bezier(0.16, 1, 0.3, 1), transform 0.22s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.22s ease;
  z-index: 1000;
  background-color: var(--surface-900) !important;
  box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.9), 0 0 0 1px var(--line) !important;
}

.courses-nav-dropdown {
  width: 620px !important;
  min-width: 620px !important;
  left: 0 !important;
  transform: translateY(-6px);
  border: 1px solid rgba(253, 212, 42, 0.45) !important;
}

.internships-nav-dropdown {
  width: 680px !important;
  min-width: 680px !important;
  left: 50% !important;
  transform: translateX(-50%) translateY(-6px) !important;
  border: 1px solid rgba(2, 197, 251, 0.45) !important;
}

.group:hover .courses-nav-dropdown,
.group:focus-within .courses-nav-dropdown {
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(0) !important;
  pointer-events: auto !important;
}

.group:hover .internships-nav-dropdown,
.group:focus-within .internships-nav-dropdown {
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateX(-50%) translateY(0) !important;
  pointer-events: auto !important;
}

.nav-dropdown .grid {
  display: grid !important;
}