/* ============================================
   CALCULADORA DRYWALL — Modern Redesign 2026
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0e0e0e;
  --surface: #191919;
  --surface-2: #222;
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.15);
  --text: #e2e2e2;
  --text-muted: rgba(226, 226, 226, 0.45);
  --accent: #f5bb00;
  --accent-dim: rgba(245, 187, 0, 0.08);
  --accent-border: rgba(245, 187, 0, 0.2);
  --accent-text: #0e0e0e;
  --radius: 0.875rem;
  --radius-sm: 0.5rem;
  --max-w: 460px;
}

html,
body {
  min-height: 100vh;
  background-color: var(--bg);
  color: var(--text);
  font-family: "Inter", "Roboto", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Layout */
.case {
  min-height: 100vh;
  width: 100%;
  display: block;
}

.cover {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 5rem 1.25rem 3rem;
}

/* Card */
.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: var(--max-w);
}

/* Typography */
.app-eyebrow {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  display: block;
}
.app-title {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  color: #fff;
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}
.app-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 1rem;
  transition: color 0.2s;
}
.back-link:hover {
  color: #fff;
}

/* Form */
.input-group {
  margin-bottom: 0.875rem;
}
.input-label {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.app-input {
  display: block;
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: 1.375rem;
  font-weight: 600;
  color: #fff;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  -webkit-appearance: none;
  -moz-appearance: textfield;
}
.app-input::placeholder {
  color: rgba(255, 255, 255, 0.2);
  font-weight: 400;
  font-size: 1rem;
}
.app-input:focus {
  border-color: var(--border-hover);
  background: rgba(255, 255, 255, 0.06);
}
.app-input[type="number"]::-webkit-outer-spin-button,
.app-input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

/* Buttons */
.app-btn {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.925rem 1.5rem;
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: var(--radius-sm);
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  text-decoration: none;
  text-align: center;
  line-height: 1;
}
.app-btn:hover {
  opacity: 0.87;
  transform: scale(0.99);
  color: var(--accent-text);
}
.app-btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  margin-top: 0.75rem;
}
.app-btn-ghost:hover {
  color: #fff;
  border-color: var(--border-hover);
  opacity: 1;
  transform: none;
}

/* Option nav buttons */
.option-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1.25rem;
}
.nav-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.125rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: 0.775rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  transition: background 0.18s, border-color 0.18s, color 0.18s, transform 0.15s;
}
.nav-option::after {
  content: "\2192";
  opacity: 0.35;
  font-size: 1rem;
  transition: opacity 0.18s, transform 0.18s;
}
.nav-option:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-hover);
  color: #fff;
  transform: translateX(2px);
}
.nav-option:hover::after {
  opacity: 1;
  transform: translateX(3px);
}

/* Results */
.result-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.surface-chip {
  display: inline-block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 2rem;
  padding: 0.3rem 0.75rem;
  white-space: nowrap;
  margin-top: 0.5rem;
  text-align: center;
}
.result-dims {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.result-dims strong {
  color: var(--text);
  font-weight: 600;
}
.result-list {
  margin-bottom: 1.75rem;
}
.result-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
}
.result-row:last-child {
  border-bottom: none;
}
.qty {
  flex-shrink: 0;
  min-width: 2.75rem;
  text-align: center;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 0.375rem;
  padding: 0.25rem 0.5rem;
}
.material {
  font-size: 0.8rem;
  color: var(--text);
  line-height: 1.4;
}

/* Home */
.home-hero {
  text-align: center;
  max-width: 440px;
  margin: 0 auto;
  width: 100%;
}
.home-hero .app-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.home-hero .app-desc {
  margin-bottom: 0.25rem;
}
.home-disclaimer {
  margin-top: 1.5rem;
  font-size: 0.7rem;
  color: rgba(226, 226, 226, 0.25);
  line-height: 1.65;
  text-align: center;
}

/* Info */
.info-link {
  display: block;
  margin-bottom: 0.625rem;
  padding: 1.25rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.info-link:hover {
  border-color: var(--border-hover);
  background: rgba(255, 255, 255, 0.04);
}
.info-link-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.25rem;
}
.info-link-value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
}

/* Credit */
.ss-credit {
  font-size: 0.65rem;
  color: rgba(226, 226, 226, 0.2);
  text-align: center;
  margin-top: 1.25rem;
  letter-spacing: 0.06em;
}

/* Utility */
.hidden {
  display: none !important;
}
.visible {
  display: block !important;
}

/* Responsive */
@media (max-width: 480px) {
  .app-card {
    padding: 1.5rem 1.25rem;
    border-radius: 0.75rem;
  }
  .home-hero .app-title {
    font-size: 1.625rem;
  }
  .cover {
    padding: 4.5rem 1rem 2.5rem;
    align-items: flex-start;
  }
}