/* =============================================
   global.css — variables, reset, base, utilities
   ============================================= */

:root {
  --accent:      #1a6ef5;
  --accent-dark: #1254c4;
  --purple:      #6D28D9;
  --navy:        #0d1b2a;
  --dark:        #111827;
  --text:        #374151;
  --text-light:  #6b7280;
  --bg-light:    #eef4ff;
  --white:       #ffffff;
  --border:      #e5e7eb;
  --radius:      12px;
  --radius-sm:   8px;
  --shadow:      0 4px 24px rgba(0,0,0,.08);
  --shadow-md:   0 8px 40px rgba(0,0,0,.12);
  --transition:  .3s ease;
  --font-head:   'Poppins', sans-serif;
  --font-body:   'Inter', sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 15px; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: #f0f5ff;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a   { text-decoration: none; color: inherit; }
ul  { list-style: none; }

.container {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 0 40px;
}

/* Typography */
h1,h2,h3,h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.2; }
h1 { font-size: clamp(2rem, 3.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2.2vw, 2rem); }
h3 { font-size: 1rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: 50px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .88rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}
.btn-primary { background: var(--accent); color: var(--white); border-color: var(--accent); }
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26,110,245,.35);
}
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,.7); }
.btn-outline:hover {
  background: var(--white);
  color: var(--accent);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

/* Section utilities */
.section { padding: 70px 0; }
.bg-light { background: #e8f0fe; }
.bg-dark  { background: var(--dark); color: var(--white); }
.bg-white { background: #ffffff; }

.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { color: var(--navy); margin-bottom: 12px; }
.bg-dark .section-header h2 { color: var(--white); }
.section-sub { color: var(--text-light); font-size: 1.05rem; max-width: 600px; margin: 0 auto 20px; }
.bg-dark .section-sub { color: rgba(255,255,255,.65); }
.section-divider { width: 60px; height: 4px; background: var(--accent); border-radius: 2px; margin: 0 auto; }

/* Section separator */
.section-sep {
  width: 100%;
  height: 6px;
  background: radial-gradient(ellipse at center, #f97316 0%, #fb923c 30%, transparent 70%);
  border: none;
  margin: 0;
  padding: 0;
  display: block;
}
.reveal { opacity: 0; transform: translateY(32px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Shared tech tags (used in portfolio) */
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-tag {
  background: var(--bg-light);
  color: var(--text);
  font-size: .78rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 50px;
  border: 1px solid var(--border);
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .container { padding: 0 20px; }
}