/* =============================================
   BASE.CSS — Variables, reset, typographie, communs
   ============================================= */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

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

/* --- Variables --- */
:root {
  --bg:         #0d0f14;
  --bg2:        #13161e;
  --bg3:        #1a1e28;
  --surface:    #1e2230;
  --border:     rgba(255, 255, 255, 0.07);
  --border-hi:  rgba(255, 255, 255, 0.14);
  --accent:     #5b7fff;
  --accent2:    #38e2b4;
  --text:       #e8eaf0;
  --text-muted: #8b91a8;
  --text-faint: #555c72;
  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
}

/* --- Base --- */
html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* --- Titres --- */
h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: #fff;
}

h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1rem;
}

/* --- Sections --- */
section {
  padding: 100px 5%;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-divider {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  margin-bottom: 3rem;
}

/* --- Boutons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--font-body);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #4a6ef0;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-hi);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --- Tags / Badges --- */
.tag {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.skill-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  background: rgba(91, 127, 255, 0.1);
  border: 1px solid rgba(91, 127, 255, 0.2);
  color: #a8b8ff;
}

.skill-tag.green {
  background: rgba(56, 226, 180, 0.1);
  border-color: rgba(56, 226, 180, 0.2);
  color: #7aefd4;
}

.skill-tag.gray {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

/* --- Animation fade-up --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}