/* =========================================================
   DGP Academy — sistema de diseño
   Tipografía: Inter Tight (UI y titulares) · Instrument Serif
   (acentos editoriales) · JetBrains Mono (código y datos)
   ========================================================= */
@font-face { font-family: "Inter Tight"; font-style: normal; font-weight: 300 800; font-display: swap; src: url("../fonts/inter-tight-latin.woff2") format("woff2"); }
@font-face { font-family: "Instrument Serif"; font-style: normal; font-weight: 400; font-display: swap; src: url("../fonts/instrument-serif-latin.woff2") format("woff2"); }
@font-face { font-family: "Instrument Serif"; font-style: italic; font-weight: 400; font-display: swap; src: url("../fonts/instrument-serif-italic-latin.woff2") format("woff2"); }
/* Respaldo con las mismas medidas que Inter Tight: si la fuente tarda, el texto no salta al cargar */
@font-face { font-family: "Inter Tight Fallback"; src: local("Arial"), local("Helvetica Neue"), local("Helvetica"); size-adjust: 93%; ascent-override: 98%; descent-override: 24%; line-gap-override: 0%; }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 400 600; font-display: swap; src: url("../fonts/jetbrains-mono-latin.woff2") format("woff2"); }

:root {
  /* Marca */
  --ink: #0a1430;          /* azul noche — titulares, superficies oscuras */
  --ink-2: #13224a;
  --accent: #1a56e8;       /* azul DGP */
  --accent-hover: #1446c4;
  --accent2: #1a56e8;
  --accent-soft: #e8efff;
  --accent-bg: rgba(26,86,232,0.07);
  --accent-border: rgba(26,86,232,0.2);
  --sky: #a8c0ff;
  --gold: #b8913a;         /* certificados y logros */
  --gold-soft: #f6efdf;

  /* Neutros */
  --bg: #ffffff;
  --bg2: #f6f8fc;
  --bg3: #eef2fa;
  --bg4: #dfe6f3;
  --paper: #f6f8fc;
  --text: #0a1430;
  --text2: #3d4a63;        /* 9.0:1 sobre blanco */
  --text3: #5d6982;        /* 5.6:1 sobre blanco */
  --text4: #8a94a8;        /* solo decorativo / placeholders */
  --border: #e3e8f2;
  --border2: #cfd7e6;
  --line: rgba(10,20,48,0.08);

  /* Estados */
  --green: #15803d;
  --green-bg: rgba(21,128,61,0.08);
  --amber: #b45309;
  --amber-bg: rgba(180,83,9,0.08);
  --coral: #c2261d;
  --coral-bg: rgba(194,38,29,0.07);
  --teal: #0369a1;
  --teal-bg: rgba(3,105,161,0.08);

  /* Tipografía */
  --font: "Inter Tight", "Inter Tight Fallback", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Inter Tight", "Inter Tight Fallback", "Helvetica Neue", Arial, sans-serif;
  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Forma */
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(10,20,48,.05), 0 1px 1px rgba(10,20,48,.03);
  --shadow: 0 1px 2px rgba(10,20,48,.04), 0 8px 24px -6px rgba(10,20,48,.10);
  --shadow-lg: 0 2px 4px rgba(10,20,48,.04), 0 24px 60px -12px rgba(10,20,48,.22);
  --ease: cubic-bezier(.22, 1, .36, 1);
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
  min-height: 100vh;
}
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
/* Acento de titulares: misma tipografía, en degradado azul */
em.serif, .serif {
  font-family: inherit; font-style: normal; font-weight: inherit; letter-spacing: inherit;
  background: linear-gradient(100deg, var(--accent) 10%, #4d7cff 90%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: var(--accent);
  padding-right: .02em;
}
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.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; }

/* ── Botones del sistema ── */
.ui-btn {
  --b-bg: var(--accent); --b-fg: #fff; --b-bd: transparent;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 48px; padding: 0 22px; border-radius: 999px;
  background: var(--b-bg); color: var(--b-fg); border: 1px solid var(--b-bd);
  font: 600 15px/1 var(--font); letter-spacing: -.01em; text-decoration: none; white-space: nowrap;
  cursor: pointer; transition: background .2s, border-color .2s, color .2s, transform .2s var(--ease), box-shadow .2s;
}
.ui-btn:hover { transform: translateY(-1px); }
.ui-btn:active { transform: translateY(0) scale(.98); }
.ui-btn svg { width: 18px; height: 18px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.ui-btn--primary:hover { --b-bg: var(--accent-hover); box-shadow: 0 10px 24px -8px rgba(26,86,232,.55); }
.ui-btn--dark { --b-bg: var(--ink); }
.ui-btn--dark:hover { --b-bg: #000; }
.ui-btn--light { --b-bg: #fff; --b-fg: var(--ink); }
.ui-btn--light:hover { --b-bg: #eef2fa; }
.ui-btn--ghost { --b-bg: transparent; --b-fg: var(--ink); --b-bd: var(--border2); }
.ui-btn--ghost:hover { --b-bd: var(--ink); }
.ui-btn--ghost-light { --b-bg: transparent; --b-fg: #fff; --b-bd: rgba(255,255,255,.35); }
.ui-btn--ghost-light:hover { --b-bd: #fff; --b-bg: rgba(255,255,255,.08); }
.ui-btn--sm { height: 38px; padding: 0 16px; font-size: 14px; }
.ui-btn--lg { height: 56px; padding: 0 28px; font-size: 16px; }
.ui-btn--block { width: 100%; }
.ui-btn[disabled] { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }

.icon-btn {
  width: 40px; height: 40px; border-radius: 12px; display: inline-grid; place-items: center;
  background: var(--bg); border: 1px solid var(--border); color: var(--text2); cursor: pointer;
  transition: border-color .2s, color .2s, background .2s;
}
.icon-btn:hover { border-color: var(--border2); color: var(--ink); background: var(--bg2); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

/* ── Etiquetas ── */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 500 12px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent);
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: currentColor; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px; border-radius: 999px;
  font: 500 12px/1 var(--font); letter-spacing: 0; white-space: nowrap;
  background: var(--bg3); color: var(--text2); border: 1px solid transparent;
}
.chip--accent { background: var(--accent-soft); color: var(--accent); }
.chip--green { background: #e7f6ec; color: var(--green); }
.chip--gold { background: var(--gold-soft); color: #8a6a22; }
.chip--dark { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.18); }
.chip .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ── Logo ── */
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); cursor: pointer; background: none; border: 0; }
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; }
.brand-name { font: 700 17px/1 var(--font); letter-spacing: -.02em; }
.brand-name span { font-weight: 400; color: var(--text3); }
.brand--light { color: #fff; }
.brand--light .brand-name span { color: rgba(255,255,255,.6); }

/* ── Formularios ── */
.form-group { margin-bottom: 16px; }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: var(--text2); margin-bottom: 7px; }
.form-input {
  width: 100%; height: 48px; padding: 0 16px;
  border: 1px solid var(--border2); border-radius: 12px; background: #fff;
  font-size: 15px; color: var(--ink); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.form-input:hover { border-color: #b9c3d6; }
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(26,86,232,.12); }
.form-input::placeholder { color: var(--text4); }
.form-input.error { border-color: var(--coral); box-shadow: 0 0 0 4px var(--coral-bg); }

/* ── Animaciones utilitarias ── */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes lessonIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes calloutIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes progressShimmer { 0% { background-position: 200% center; } 100% { background-position: -200% center; } }
@keyframes shine { 0%,100% { background-position: 100% 50%; } 50% { background-position: 0% 50%; } }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cfd7e6; border-radius: 10px; border: 3px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: #aab6cc; background-clip: content-box; border: 3px solid transparent; }

/* ── Splash ── */
.splash-screen {
  position: fixed; inset: 0; z-index: 9999; background: var(--ink);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 28px;
  opacity: 0; pointer-events: none; transition: opacity .35s ease;
}
.splash-screen.active { opacity: 1; pointer-events: all; }
.splash-screen .brand-mark { width: 56px; height: 56px; }
.splash-brand { font: 700 22px/1 var(--font); letter-spacing: -.02em; color: #fff; display: flex; align-items: center; gap: 14px; }
.splash-brand span { font-weight: 400; color: rgba(255,255,255,.55); }
.splash-bar { width: 160px; height: 2px; border-radius: 2px; background: rgba(255,255,255,.12); overflow: hidden; position: relative; }
.splash-bar::after { content: ""; position: absolute; inset: 0; width: 40%; background: #fff; border-radius: 2px; animation: splashBar 1s var(--ease) infinite; }
@keyframes splashBar { from { transform: translateX(-100%); } to { transform: translateX(250%); } }

/* ── Toast ── */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 9000; transform: translate(-50%, 20px);
  background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 12px; font-size: 14px;
  box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s var(--ease);
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

[hidden] { display: none !important; }