/* ═══════════════════════════════════════════════
   estilos-base.css — EnergiAVerde
   Variables globales, reset, tipografía y
   componentes compartidos por todas las secciones.
   Este archivo debe cargarse PRIMERO.
═══════════════════════════════════════════════ */

/* ── Variables de diseño ── */
:root {
  --bg:         #080d08;
  --surface:    #0f180f;
  --surface2:   #162016;
  --surface3:   #1e2e1e;
  --green:      #4ade80;
  --green-dim:  #22c55e;
  --green-dark: #166534;
  --amber:      #fbbf24;
  --teal:       #2dd4bf;
  --sky:        #38bdf8;
  --red:        #f87171;
  --muted:      #657065;
  --text:       #e4ede4;
  --text-dim:   #96a896;
  --border:     #1e2e1e;
  --border2:    #253525;
  --radius:     14px;
  --radius-sm:  8px;
  --shadow:     0 4px 24px rgba(0,0,0,0.4);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
strong { color: var(--text); }

/* ── Scrollbar ── */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* ── Tipografía ── */
h1, h2, h3, h4, h5 {
  font-family: 'Syne', sans-serif;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }
p  { color: var(--text-dim); margin-bottom: 1rem; }

/* ── Layout ── */
.container  { max-width: 1140px; margin: 0 auto; padding: 0 1.5rem; }
section     { padding: 5rem 1.5rem; }
.divider    { border: none; border-top: 1px solid var(--border); }

/* ── Botones ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.6rem; border-radius: 999px;
  font-family: 'DM Sans', sans-serif; font-weight: 500;
  font-size: 0.9rem; cursor: pointer;
  transition: all 0.2s ease; border: none; white-space: nowrap;
  text-decoration: none;
}
.btn-primary { background: var(--green); color: #080d08; }
.btn-primary:hover {
  background: #6ee89a; transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(74,222,128,0.3); text-decoration: none;
}
.btn-outline { background: transparent; color: var(--text-dim); border: 1px solid var(--border2); }
.btn-outline:hover { border-color: var(--green); color: var(--green); text-decoration: none; }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.82rem; }

/* ── Chips / etiquetas ── */
.chip {
  display: inline-block; padding: 0.22rem 0.65rem;
  background: rgba(74,222,128,0.1); border: 1px solid rgba(74,222,128,0.2);
  border-radius: 999px; font-size: 0.72rem; color: var(--green);
  font-weight: 500; margin: 0.2rem;
}
.chip.amber { background: rgba(251,191,36,0.1);  border-color: rgba(251,191,36,0.2);  color: var(--amber); }
.chip.teal  { background: rgba(45,212,191,0.1);  border-color: rgba(45,212,191,0.2);  color: var(--teal);  }
.chip.sky   { background: rgba(56,189,248,0.1);  border-color: rgba(56,189,248,0.2);  color: var(--sky);   }

/* ── Tarjeta base ── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover { border-color: var(--border2); box-shadow: var(--shadow); }

/* ── Encabezados de sección ── */
.section-tag {
  display: block; font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--green); margin-bottom: 0.4rem;
}
.section-intro           { max-width: 600px; margin-bottom: 2.5rem; }
.section-intro p         { font-size: 1.05rem; }

/* ── Caja de aviso ── */
.notice {
  background: rgba(74,222,128,0.05);
  border: 1px solid rgba(74,222,128,0.18);
  border-radius: var(--radius-sm); padding: 1rem 1.25rem;
  font-size: 0.85rem; color: var(--text-dim); margin-bottom: 1.5rem;
}
.notice strong { color: var(--green); }

/* ── Inputs y selects (compartidos) ── */
select, input[type="number"], input[type="text"] {
  background: var(--surface2); border: 1px solid var(--border2);
  color: var(--text); border-radius: var(--radius-sm);
  padding: 0.5rem 0.8rem; font-family: 'DM Sans', sans-serif;
  font-size: 0.86rem; outline: none; transition: border-color 0.2s;
}
select:focus, input:focus { border-color: var(--green); }
select option             { background: var(--surface2); }

/* ── Footer ── */
footer {
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem; text-align: center;
}
.footer-logo {
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: 1.25rem; letter-spacing: -0.04em;
  color: var(--green); margin-bottom: 0.5rem;
}
.footer-logo span  { color: var(--amber); }
footer p           { font-size: 0.8rem; color: var(--muted); margin: 0.25rem 0; }
.footer-links      { display: flex; gap: 1.5rem; justify-content: center; margin-top: 1rem; flex-wrap: wrap; }
.footer-links a    { font-size: 0.8rem; color: var(--muted); }
.footer-links a:hover { color: var(--green); }