/* ============================================================
   BASE.CSS — Variables, Reset, Tipografía, Utilidades
   Lumis Clínica Estética · Portfolio Project
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400;1,500&family=Jost:wght@300;400;500;600&display=swap');

/* ── Variables ────────────────────────────────────────────── */
:root {
  /* Paleta principal */
  --white:        #ffffff;
  --sage:         #8faf8f;
  --sage-light:   #b8cfb8;
  --sage-pale:    #eef4ee;
  --sage-mid:     #d4e4d4;
  --sage-dark:    #5a7a5a;
  --sage-deep:    #3d5c3d;

  /* Grises */
  --gray-50:      #fafaf8;
  --gray-100:     #f4f4f1;
  --gray-200:     #e8e8e4;
  --gray-400:     #b0b0aa;
  --gray-600:     #6a6a64;
  --gray-900:     #1a1a18;

  /* Dark */
  --dark:         #141412;
  --dark-soft:    #242420;

  /* Tipografía */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Jost', system-ui, sans-serif;

  /* Espaciado */
  --space-xs:     8px;
  --space-sm:     16px;
  --space-md:     24px;
  --space-lg:     40px;
  --space-xl:     64px;
  --space-2xl:    100px;

  /* Bordes */
  --radius-sm:    8px;
  --radius:       16px;
  --radius-lg:    24px;

  /* Sombras */
  --shadow-xs:    0 2px 12px rgba(0,0,0,0.05);
  --shadow-sm:    0 4px 24px rgba(0,0,0,0.07);
  --shadow-md:    0 8px 40px rgba(0,0,0,0.10);
  --shadow-lg:    0 16px 64px rgba(0,0,0,0.12);

  /* Transiciones */
  --ease:         cubic-bezier(0.4, 0, 0.2, 1);
  --transition:   all 0.35s var(--ease);
  --transition-fast: all 0.2s var(--ease);

  /* Layout */
  --container:    1240px;
  --navbar-h:     80px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--dark);
  background: var(--white);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

ul, ol { list-style: none; }

button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: var(--font-body);
}

/* ── Tipografía base ──────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.1;
}

p { line-height: 1.7; }

/* ── Container ────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ── Etiquetas de sección ─────────────────────────────────── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sage-dark);
  margin-bottom: var(--space-sm);
}

.section-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--sage);
}

/* ── Títulos de sección ───────────────────────────────────── */
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  font-weight: 300;
  color: var(--dark);
  line-height: 1.12;
}

.section-title em {
  font-style: italic;
  color: var(--sage-dark);
}

.section-title--light {
  color: var(--white);
}

.section-title--light em {
  color: var(--sage-light);
}

/* ── Subtítulo ────────────────────────────────────────────── */
.section-subtitle {
  font-size: 0.975rem;
  font-weight: 300;
  color: var(--gray-600);
  line-height: 1.75;
  max-width: 540px;
  margin-top: 14px;
}

.section-subtitle--light {
  color: rgba(255,255,255,0.65);
}

/* ── Animaciones de entrada ───────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }

/* ── Scroll reveal stagger ────────────────────────────────── */
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.stagger.visible > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0s; }
.stagger.visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.1s; }
.stagger.visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.2s; }
.stagger.visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.3s; }

/* ── Separador decorativo ─────────────────────────────────── */
.divider {
  width: 48px;
  height: 1px;
  background: var(--sage);
  display: block;
  margin: var(--space-md) 0;
}

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