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

/* ==========================================================================
   THEMING — Change these variables to retheme the entire site.
   All accent colors, backgrounds, and effects derive from these values.
   ========================================================================== */

:root {
  /* Base colors — dark theme */
  --bg-color: #0a0a0a;
  --bg-elevated: #141414;
  --text-primary: #f0f0f0;
  --text-secondary: #999999;

  /* Accent — CHANGE THESE to retheme the entire site */
  --accent-color: #4a9eff;
  --accent-color-rgb: 74, 158, 255;
  --accent-gradient: linear-gradient(135deg, #4a9eff, #2563eb);
  --accent-hover: #2563eb;

  /* Glass morphism */
  --glass-bg: rgba(25, 25, 25, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);

  /* Spacing */
  --section-padding: 120px;
  --container-max: 1200px;

  /* Typography */
  --font-family: 'Inter', sans-serif;
  --font-weight-normal: 400;
  --font-weight-semibold: 600;
  --font-weight-bold: 800;

  /* Transitions */
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.3s ease;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 50px;

  /* Space reserved for the fixed mobile navigation dock. */
  --dock-content-space: 0px;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: var(--dock-content-space);
}

@media (max-width: 600px) {
  :root {
    --dock-content-space: calc(88px + env(safe-area-inset-bottom));
  }
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.1;
}

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

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

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

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

.app-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.primary-button {
  display: inline-block;
  background: var(--accent-gradient);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: var(--font-weight-bold);
  font-size: 1.1rem;
  box-shadow: 0 4px 15px rgba(var(--accent-color-rgb), 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  cursor: pointer;
}

.primary-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--accent-color-rgb), 0.5);
  color: #fff;
}

.secondary-button {
  display: inline-block;
  background: transparent;
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.secondary-button:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.page-loading {
  min-height: 50vh;
  display: grid;
  place-items: center;
  padding: 120px 24px 80px;
  color: var(--text-secondary);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

/* Section layout */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
  font-size: 1.1rem;
}

/* Background mesh effect */
.background-mesh {
  position: absolute;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(var(--accent-color-rgb), 0.05) 0%, transparent 50%),
              radial-gradient(circle at 0% 0%, rgba(var(--accent-color-rgb), 0.03) 0%, transparent 40%),
              radial-gradient(circle at 100% 100%, rgba(var(--accent-color-rgb), 0.03) 0%, transparent 40%);
  pointer-events: none;
  z-index: -1;
}

/* Animations */
@keyframes fadeUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}