/* ============================================================================
   PresuPro - Estilos compartidos v3
   ============================================================================ */

:root {
  --bg: #0a0a0a;
  --bg-2: #141414;
  --surface: #1c1c1c;
  --surface-2: #262626;
  --border: #2e2e2e;
  --border-soft: #1f1f1f;
  --text: #ededed;
  --text-soft: #999;
  --text-faded: #666;
  --accent: #d4ff3d;
  --accent-soft: rgba(212, 255, 61, 0.1);
  --danger: #ff5e5e;
  --success: #4ade80;
  --warning: #fbbf24;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  min-height: 100vh;
}

body {
  background-image:
    radial-gradient(circle at 20% 0%, rgba(212, 255, 61, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 100%, rgba(212, 255, 61, 0.03) 0%, transparent 50%);
  background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.font-display { font-family: 'Instrument Serif', Georgia, serif; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

/* NAV */
.nav {
  border-bottom: 1px solid var(--border-soft);
  position: sticky; top: 0;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  z-index: 50;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: -0.01em;
}
.logo-icon {
  width: 32px; height: 32px;
  background: var(--accent); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--bg); font-weight: 700; font-size: 16px;
}
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-link {
  color: var(--text-soft); font-size: 14px;
  transition: color 0.15s ease;
  background: none; border: none; padding: 0;
  font-family: inherit;
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--accent); }
.usage-badge {
  background: var(--bg-2); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px;
  font-size: 12px; color: var(--text-soft);
  font-family: 'JetBrains Mono', monospace;
}
.usage-badge.warning { color: var(--danger); border-color: rgba(255, 94, 94, 0.3); }

/* Mobile menu */
@media (max-width: 700px) {
  .nav-links { gap: 12px; }
  .nav-link { font-size: 13px; }
  .usage-badge { display: none; }
}

/* LAYOUT */
.container { max-width: 1200px; margin: 0 auto; padding: 64px 24px; }
.container-narrow { max-width: 480px; margin: 0 auto; padding: 64px 24px; }
.container-mid { max-width: 800px; margin: 0 auto; padding: 64px 24px; }

/* TYPO */
.h1 {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(40px, 8vw, 80px);
  line-height: 0.95; letter-spacing: -0.02em;
  margin: 0 0 24px;
  background: linear-gradient(180deg, #ffffff 0%, #999 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.h2 { font-family: 'Instrument Serif', serif; font-size: 32px; margin: 0 0 8px; font-weight: 400; }
.h3 { font-family: 'Instrument Serif', serif; font-size: 24px; margin: 0 0 8px; font-weight: 400; }
.lead { font-size: 18px; color: var(--text-soft); max-width: 600px; line-height: 1.6; }
.text-soft { color: var(--text-soft); }
.text-faded { color: var(--text-faded); }
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger); }
.italic { font-style: italic; }

/* BADGES */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px;
  background: var(--accent-soft);
  border: 1px solid rgba(212, 255, 61, 0.2);
  border-radius: 999px;
  color: var(--accent);
  font-size: 12px; font-weight: 500; letter-spacing: 0.02em;
}
.badge-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; display: inline-block; }
.label-uppercase {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.2em;
  color: var(--text-soft);
}

/* CARDS */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 32px; }
.card-soft { background: var(--bg-2); border: 1px solid var(--border-soft); border-radius: 12px; padding: 20px; }

/* FORMS */
input, textarea, select {
  width: 100%;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 16px; border-radius: 8px;
  font-size: 15px; font-family: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--accent); background: var(--surface-2);
}
input:disabled { opacity: 0.5; cursor: not-allowed; }
input::placeholder, textarea::placeholder { color: var(--text-faded); }
textarea { resize: vertical; min-height: 80px; }

.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; color: var(--text-soft); margin-bottom: 6px; font-weight: 500; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.form-error {
  background: rgba(255, 94, 94, 0.08);
  border: 1px solid rgba(255, 94, 94, 0.3);
  color: var(--danger);
  padding: 12px 16px; border-radius: 8px;
  font-size: 14px; margin: 16px 0;
}
.form-success {
  background: rgba(74, 222, 128, 0.08);
  border: 1px solid rgba(74, 222, 128, 0.3);
  color: var(--success);
  padding: 12px 16px; border-radius: 8px;
  font-size: 14px; margin: 16px 0;
}
.form-warning {
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.3);
  color: var(--warning);
  padding: 16px 20px; border-radius: 8px;
  font-size: 14px; margin: 16px 0;
  display: flex; align-items: flex-start; gap: 12px;
}
.form-warning a { color: var(--warning); text-decoration: underline; font-weight: 600; }

/* BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; border: none;
  font-size: 14px; font-weight: 600; text-decoration: none;
  transition: all 0.15s ease; letter-spacing: -0.01em;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px -8px rgba(212, 255, 61, 0.4);
}
.btn-secondary { background: var(--surface); border: 1px solid var(--border); color: var(--text); }
.btn-secondary:hover:not(:disabled) { background: var(--surface-2); border-color: var(--text-soft); }
.btn-ghost { background: transparent; color: var(--text-soft); padding: 8px 12px; }
.btn-ghost:hover { color: var(--accent); }
.btn-danger {
  background: transparent; border: 1px solid rgba(255, 94, 94, 0.3); color: var(--danger);
}
.btn-danger:hover:not(:disabled) { background: rgba(255, 94, 94, 0.1); }
.btn-block { width: 100%; padding: 14px 24px; font-size: 15px; }
.btn-large { padding: 16px 32px; font-size: 16px; }

/* SPINNER */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(10, 10, 10, 0.2);
  border-top-color: var(--bg);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
.ai-pulse {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, var(--accent) 280deg, transparent 360deg);
  -webkit-mask: radial-gradient(circle, transparent 50%, black 53%);
          mask: radial-gradient(circle, transparent 50%, black 53%);
  animation: spin 1.1s linear infinite; margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* UTILS */
.fade-in { animation: fadeIn 0.4s ease-out both; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.hidden { display: none !important; }
.divider { border: none; border-top: 1px solid var(--border-soft); margin: 32px 0; }
.num-tabular { font-variant-numeric: tabular-nums; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-end { display: flex; justify-content: flex-end; align-items: center; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }

/* TOAST */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent); color: var(--bg);
  padding: 12px 20px; border-radius: 8px;
  font-size: 14px; font-weight: 600; z-index: 100;
  animation: toastIn 0.3s ease-out;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.toast.error { background: var(--danger); color: white; }
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* LINE ROWS (presupuesto) */
.line-row {
  display: grid;
  grid-template-columns: 1fr 80px 100px 110px 32px;
  gap: 8px; align-items: center; margin-bottom: 8px;
}
.line-row input, .line-row select { padding: 10px 12px; font-size: 14px; }
@media (max-width: 700px) {
  .line-row { grid-template-columns: 1fr 1fr; }
  .line-row > *:first-child { grid-column: 1 / -1; }
  .line-row > *:last-child { grid-column: 1 / -1; }
}

/* TABLE */
.quotes-table { width: 100%; border-collapse: collapse; }
.quotes-table th {
  background: var(--surface-2); padding: 12px 16px; text-align: left;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-soft); font-weight: 500;
  border-bottom: 1px solid var(--border);
}
.quotes-table td {
  padding: 16px; border-bottom: 1px solid var(--border-soft);
  font-size: 14px;
}
.quotes-table tbody tr { transition: background 0.15s ease; cursor: pointer; }
.quotes-table tbody tr:hover { background: var(--surface); }

/* PDF PREVIEW */
.pdf-preview {
  background: white; color: #1a1a1a;
  border-radius: 12px; padding: 48px;
  font-family: 'Inter', sans-serif; font-size: 14px;
}
.pdf-preview .pdf-h1 {
  font-family: 'Instrument Serif', serif;
  font-size: 36px; font-weight: 400; line-height: 1; margin: 0;
}

/* FAQ */
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  user-select: none;
}
.faq-question:hover { background: var(--surface-2); }
.faq-icon {
  font-family: monospace;
  font-size: 18px;
  color: var(--accent);
  transition: transform 0.2s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 500px; }
.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-soft);
  line-height: 1.6;
  font-size: 14px;
}

/* FOOTER */
.footer { border-top: 1px solid var(--border-soft); margin-top: 80px; padding: 32px 24px; }
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: 12px; font-size: 12px; color: var(--text-soft);
}