/* InforTIC 2026 - Main Stylesheet & Design System */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800;900&display=swap');

:root {
  /* Colors - Light Theme */
  --bg-color: #0c1524;
  --bg-gradient: radial-gradient(circle at 10% 20%, rgba(14, 27, 49, 1) 0%, rgba(7, 13, 23, 1) 90.1%);
  --panel-bg: rgba(255, 255, 255, 0.03);
  --panel-border: rgba(255, 255, 255, 0.08);
  --panel-hover-border: rgba(88, 191, 210, 0.3);
  --text-color: #f3f7fd;
  --text-muted: #94a9c9;
  --text-inverse: #070d17;
  
  --primary: #58bfd2;
  --primary-rgb: 88, 191, 210;
  --secondary: #708cff;
  --secondary-rgb: 112, 140, 255;
  --accent: #8af0cc;
  --accent-rgb: 138, 240, 204;
  
  --success: #6be095;
  --warning: #ffbe5c;
  --danger: #ff6b8b;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  
  --font-body: 'Inter', system-ui, sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;
  
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  
  --header-height: 80px;
}

/* Dark mode theme overrides (defaults to dark, but explicit class for toggle) */
[data-theme="light"] {
  --bg-color: #f6f8fb;
  --bg-gradient: radial-gradient(circle at 10% 20%, #f4f6fa 0%, #e9edf5 100%);
  --panel-bg: rgba(255, 255, 255, 0.85);
  --panel-border: rgba(16, 24, 40, 0.08);
  --panel-hover-border: rgba(15, 110, 121, 0.4);
  --text-color: #0e1e38;
  --text-muted: #5e6f88;
  --text-inverse: #f3f7fd;
  
  --primary: #0f6e79;
  --primary-rgb: 15, 110, 121;
  --secondary: #1769c2;
  --secondary-rgb: 23, 105, 194;
  --accent: #2d7a46;
  --accent-rgb: 45, 122, 70;
  
  --success: #278f4a;
  --warning: #ad6d00;
  --danger: #b32b49;
  
  --shadow-sm: 0 2px 8px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 8px 30px rgba(15, 31, 56, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 31, 56, 0.12);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  background: var(--bg-gradient);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Structure */
.container {
  width: min(1200px, calc(100% - 32px));
  margin-inline: auto;
}

section {
  padding-block: clamp(60px, 8vw, 120px);
  scroll-margin-top: var(--header-height);
  position: relative;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-color);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.5em;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
}

h3 {
  font-size: clamp(1.3rem, 2vw, 1.8rem);
}

p {
  margin-bottom: 1rem;
}

p.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--text-muted);
  font-weight: 400;
  max-width: 70ch;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding-inline: 24px;
  border-radius: 9999px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast), border var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
  border: 1px solid transparent;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--text-inverse);
  box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(var(--primary-rgb), 0.35);
}

.btn-secondary {
  background: var(--panel-bg);
  color: var(--text-color);
  border-color: var(--panel-border);
}

.btn-secondary:hover {
  background: rgba(var(--primary-rgb), 0.1);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* Badges */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 9999px;
  background: rgba(var(--primary-rgb), 0.1);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

/* Glassmorphism Panels */
.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

/* Scroll reveal helper classes */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-left.in-view {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal-right.in-view {
  opacity: 1;
  transform: translateX(0);
}

/* Grid helper classes */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ── Form field styling ── */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.field input,
.field textarea,
.field select {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-color);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

.field textarea {
  min-height: 100px;
  resize: vertical;
}

/* ── Step numbers (Methodology section) ── */
.step-no {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--panel-border);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-inline: auto;
  margin-bottom: 12px;
  font-family: var(--font-display);
}

/* ── Service/case study cards ── */
.service-card {
  padding: 28px;
  cursor: default;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}

.service-card:hover {
  border-color: var(--panel-hover-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.case-card {
  padding: 28px;
  cursor: pointer;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}

.case-card:hover {
  border-color: var(--panel-hover-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* ── Project metadata chips ── */
.project-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.project-meta span {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 9999px;
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
}

/* ── Tab system ── */
.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab-btn {
  padding: 8px 18px;
  border-radius: 9999px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-color);
  border-color: var(--primary);
  background: rgba(var(--primary-rgb), 0.06);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--text-inverse);
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.25);
}

.tab-panel {
  display: none;
  padding: 20px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  background: var(--panel-bg);
  box-shadow: var(--shadow-sm);
}

.tab-panel.active {
  display: block;
}

/* ── Skip link (accessibility) ── */
.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  background: var(--primary);
  color: var(--text-inverse);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
}

/* ── Mobile dropdown nav override ── */
@media (max-width: 992px) {
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 8px 0 0 16px;
    background: transparent;
    display: none;
  }
  .dropdown.open .dropdown-menu {
    display: flex;
  }
  .dropdown-toggle {
    width: 100%;
    justify-content: space-between;
  }
  .hero-float-card {
    display: none;
  }
}