/* ============================================
   UTECH Design System — Base Styles
   ============================================ */

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

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--dark-bg);
  background-image: var(--gradient-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--dark-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* ── Selection ── */
::selection {
  background: var(--primary);
  color: var(--text-white);
}

/* ── Links ── */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

/* ── Images ── */
img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-white);
  letter-spacing: 0;
}

h1 { font-size: var(--text-6xl); }
h2 { font-size: var(--text-5xl); }
h3 { font-size: var(--text-4xl); }
h4 { font-size: var(--text-3xl); }
h5 { font-size: var(--text-2xl); }
h6 { font-size: var(--text-xl); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  max-width: 70ch;
}

p:last-child {
  margin-bottom: 0;
}

/* ── Lists ── */
ul, ol {
  list-style: none;
}

/* ── Buttons ── */
button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: var(--text-base);
}

/* ── Inputs ── */
input, textarea, select {
  font-family: var(--font-body);
  font-size: var(--text-base);
  outline: none;
  border: none;
}

input:focus, textarea:focus, select:focus {
  outline: none;
}

/* ── Utility Classes ── */
.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
}

.text-primary-color {
  color: var(--primary);
}

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

.text-left {
  text-align: left;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

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

/* ── Section Helpers ── */
.section-dark {
  background: var(--dark-bg);
}

.section-darker {
  background: var(--dark-bg-alt);
}

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

.section-light h1,
.section-light h2,
.section-light h3,
.section-light h4,
.section-light h5,
.section-light h6 {
  color: var(--text-dark);
}

.section-light p {
  color: var(--text-dark-secondary);
}

/* ── Divider ── */
.divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  margin: var(--space-4) 0;
}

.divider-center {
  margin-left: auto;
  margin-right: auto;
}

/* ── Focus Visible ── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}