/* ============================================================
   MAIN.CSS — Design System & Global Styles
   Sistema Robot Web DICOM
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ── Design Tokens ────────────────────────────────────────── */
:root {
  /* Colors */
  --c-primary:        #1565C0;
  --c-primary-light:  #42A5F5;
  --c-primary-dark:   #0D47A1;
  --c-accent:         #00BCD4;
  --c-accent-dark:    #0097A7;
  --c-dark:           #0D1B2A;
  --c-dark-2:         #112240;
  --c-dark-3:         #1A3255;
  --c-surface:        #F4F6F9;
  --c-surface-2:      #E8EDF4;
  --c-white:          #FFFFFF;
  --c-success:        #00C853;
  --c-warning:        #FFB300;
  --c-danger:         #EF5350;
  --c-text:           #1A1A2E;
  --c-text-secondary: #4A5568;
  --c-text-muted:     #718096;
  --c-border:         #E2E8F0;
  --c-border-dark:    rgba(255,255,255,0.1);

  /* Gradients */
  --g-hero:     linear-gradient(135deg, #0D1B2A 0%, #112240 40%, #1565C0 100%);
  --g-primary:  linear-gradient(135deg, #1565C0 0%, #42A5F5 100%);
  --g-accent:   linear-gradient(135deg, #00BCD4 0%, #42A5F5 100%);
  --g-dark:     linear-gradient(180deg, #0D1B2A 0%, #112240 100%);
  --g-card:     linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);

  /* Typography */
  --font-main:    'Inter', sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
  --fw-light:     300;
  --fw-regular:   400;
  --fw-medium:    500;
  --fw-semibold:  600;
  --fw-bold:      700;
  --fw-extrabold: 800;

  /* Font sizes */
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.5rem;
  --fs-2xl:  1.875rem;
  --fs-3xl:  2.25rem;
  --fs-4xl:  3rem;
  --fs-5xl:  3.75rem;
  --fs-6xl:  4.5rem;

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* Border radius */
  --r-sm:   4px;
  --r-md:   8px;
  --r-lg:   16px;
  --r-xl:   24px;
  --r-2xl:  32px;
  --r-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg:  0 10px 40px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.08);
  --shadow-xl:  0 20px 60px rgba(0,0,0,0.16);
  --shadow-primary: 0 8px 30px rgba(21,101,192,0.35);
  --shadow-accent:  0 8px 30px rgba(0,188,212,0.30);

  /* Transitions */
  --t-fast:   150ms ease;
  --t-base:   250ms ease;
  --t-slow:   400ms ease;
  --t-slower: 600ms ease;

  /* Layout */
  --max-width: 1280px;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-main);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-white);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: var(--fw-bold);
}

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section {
  padding: var(--sp-24) 0;
}

.section--dark {
  background: var(--g-dark);
  color: var(--c-white);
}

.section--surface {
  background: var(--c-surface);
}

.section--accent {
  background: linear-gradient(135deg, #0D1B2A 0%, #1565C0 100%);
  color: var(--c-white);
}

.grid {
  display: grid;
  gap: var(--sp-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }
.gap-2 { gap: var(--sp-2); }
.gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); }
.gap-8 { gap: var(--sp-8); }

/* ── Section Header ───────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: var(--sp-16);
}

.section-header .eyebrow {
  display: inline-block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  background: rgba(0,188,212,0.1);
  padding: var(--sp-1) var(--sp-4);
  border-radius: var(--r-full);
  margin-bottom: var(--sp-4);
  border: 1px solid rgba(0,188,212,0.25);
}

.section-header h2 {
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl));
  font-weight: var(--fw-bold);
  margin-bottom: var(--sp-4);
  line-height: 1.15;
}

.section-header p {
  font-size: var(--fs-lg);
  color: var(--c-text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

.section--dark .section-header p,
.section--accent .section-header p {
  color: rgba(255,255,255,0.7);
}

.section--dark .section-header h2,
.section--accent .section-header h2 {
  color: var(--c-white);
}

/* ── Typography Helpers ───────────────────────────────────── */
.text-center { text-align: center; }
.text-white  { color: var(--c-white); }
.text-muted  { color: var(--c-text-muted); }
.text-accent { color: var(--c-accent); }
.text-primary{ color: var(--c-primary); }

.font-heading { font-family: var(--font-heading); }
.fw-bold      { font-weight: var(--fw-bold); }

/* ── Scroll Animation Base ────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding: 0 var(--sp-4); }
  .section { padding: var(--sp-16) 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section-header { margin-bottom: var(--sp-10); }
  .section-header p { font-size: var(--fs-base); }
}