/* ═══════════════════════════════════════════
   CERVO HR — MAIN CSS
   Variables, Reset, Navbar, Utilities
═══════════════════════════════════════════ */

/* ─── TOKENS ─────────────────────────────── */
:root {
  --c-black:    #000000;
  --c-white:    #ffffff;
  --c-stone:    #ddd9d3;
  --c-warm:     #8a8580;
  --c-bg:       #f7f5f2;
  --c-surface:  #ffffff;
  --c-border:   rgba(0,0,0,0.08);
  --c-text:     #000000;
  --c-text-2:   #8a8580;
  --c-text-3:   #b8b4b0;
  --c-accent:   #000000;
  --c-accent-h: #1a1a1a;

  --nav-h:      64px;
  --nav-bg:     rgba(247,245,242,0.85);
  --nav-border: rgba(0,0,0,0.06);

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  28px;

  --shadow-xs:  0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm:  0 2px 12px rgba(0,0,0,0.08);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.10);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.14);

  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring:cubic-bezier(0.34, 1.56, 0.64, 1);

  --font-sans:  'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-inter: 'Inter', var(--font-sans);
}

[data-theme="dark"] {
  --c-bg:       #0e0e0e;
  --c-surface:  #161616;
  --c-border:   rgba(255,255,255,0.08);
  --c-text:     #f0ece6;
  --c-text-2:   #8a8580;
  --c-text-3:   #4a4744;
  --c-accent:   #f0ece6;
  --c-accent-h: #ddd9d3;
  --c-stone:    #2a2826;
  --nav-bg:     rgba(14,14,14,0.88);
  --nav-border: rgba(255,255,255,0.06);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-inter);
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  transition: background 0.4s var(--ease-out),
              color 0.4s var(--ease-out);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; }

/* ─── NAVBAR ─────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: background 0.4s var(--ease-out),
              border-color 0.4s var(--ease-out),
              box-shadow 0.4s var(--ease-out);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
  background: var(--nav-bg);
}

.nav-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
  padding: 0 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.nav-left  { display: flex; align-items: center; gap: 8px; }
.nav-right { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.nav-center { display: flex; justify-content: center; align-items: center; }

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: opacity 0.2s;
}
.nav-logo:hover { opacity: 0.75; }

.logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  transition: opacity 0.3s var(--ease-out);
  position: absolute;
}

/* Muestra logo oscuro en modo light, claro en modo dark */
.logo-dark  { opacity: 1; }
.logo-light { opacity: 0; }

[data-theme="dark"] .logo-dark  { opacity: 0; }
[data-theme="dark"] .logo-light { opacity: 1; }



/* Oculta el texto fallback cuando haya imagen de logo */
/* (descomenta la siguiente línea cuando subas el logo) */
.logo-text { display: none; } 

/* Botones de nav */
.nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  color: var(--c-text);
  transition: background 0.2s, color 0.2s, transform 0.2s var(--ease-spring);
}
.nav-btn:hover {
  background: var(--c-stone);
  transform: scale(1.06);
}
.nav-btn:active { transform: scale(0.96); }

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 4.5px;
  width: 18px;
}
.hamburger i {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.35s var(--ease-spring),
              opacity 0.25s,
              width 0.3s var(--ease-out);
  transform-origin: left center;
}
.hamburger i:nth-child(1) { width: 18px; }
.hamburger i:nth-child(2) { width: 12px; }
.hamburger i:nth-child(3) { width: 16px; }

.nav-btn:hover .hamburger i:nth-child(2) { width: 18px; }

/* Theme toggle icons */
.theme-toggle .icon-sun  { display: block; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun  { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Progress bar */
.nav-progress {
  position: absolute;
  bottom: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--c-black);
  transition: width 0.1s linear, background 0.4s;
}
[data-theme="dark"] .nav-progress {
  background: var(--c-white);
}

/* ─── PROGRESS SCROLL ────────────────────── */
/* (Activado via JS) */

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

/* Animación fade-up general */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.spin { animation: spin 0.8s linear infinite; }

/* ─── RESPONSIVE NAV ─────────────────────── */
@media (max-width: 600px) {
  .nav-inner { padding: 0 16px; }
}