/* ================================================================
   FINANCE APP LANDING — main.css
   Design tokens, reset, base styles, buttons, utilities
   ================================================================ */

/* ── Design Tokens (mirror del design system de la app) ───────── */
:root {
  /* Brand */
  --primary:        #2A8C6E;
  --primary-light:  #5EC4A0;
  --primary-dark:   #0D4F3C;
  --secondary:      #00C48C;
  --secondary-dark: #00A374;
  --accent:         #FFB800;
  --debt:           #7F5AF0;
  --income:         #00C48C;
  --expense:        #FF6B6B;
  --cyan:           #00D9FF;

  /* Backgrounds */
  --bg:          #07100C;
  --bg-card:     #0C1811;
  --bg-card-2:   #12201A;
  --bg-elevated: #182B22;
  --border:      rgba(255,255,255,.07);
  --border-soft: rgba(255,255,255,.13);

  /* Text */
  --text:           #FFFFFF;
  --text-secondary: rgba(255,255,255,.62);
  --text-muted:     rgba(255,255,255,.35);

  /* Gradients */
  --grad-primary:  linear-gradient(135deg,#5EC4A0 0%,#0D4F3C 100%);
  --grad-secondary:linear-gradient(135deg,#00C48C 0%,#00D9FF 100%);
  --grad-card:     linear-gradient(145deg,#0C1811 0%,#12201A 100%);

  /* Spacing scale (4 px base) */
  --sp-1:  4px; --sp-2:  8px; --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10:40px;
  --sp-12:48px; --sp-16:64px; --sp-20:80px; --sp-24:96px;

  /* Type scale */
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --text-xs:  .75rem;
  --text-sm:  .875rem;
  --text-base:1rem;
  --text-lg:  1.125rem;
  --text-xl:  1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Radii */
  --r-sm:  6px; --r:    10px; --r-md: 14px;
  --r-lg: 20px; --r-xl: 28px; --r-full:9999px;

  /* Shadows */
  --sh:         0 8px 24px rgba(0,0,0,.4);
  --sh-lg:      0 20px 60px rgba(0,0,0,.5);
  --sh-primary: 0 8px 32px rgba(42,140,110,.35);

  /* Motion */
  --ease: 200ms ease;
  --ease-slow: 420ms ease;

  /* Layout */
  --max-w: 1200px;
  --nav-h: 72px;
}

/* ── Reset ────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  font-family:var(--font);
  font-size:var(--text-base);
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em}

/* ── Container ────────────────────────────────────────────────── */
.container{
  width:100%;max-width:var(--max-w);
  margin:0 auto;padding:0 var(--sp-6);
}
@media(max-width:768px){.container{padding:0 var(--sp-5)}}

/* ── Typography helpers ───────────────────────────────────────── */
.gradient-text{
  background:var(--grad-primary);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:var(--sp-2);
  padding:12px 24px;border-radius:var(--r-full);
  font-size:var(--text-sm);font-weight:600;
  transition:all var(--ease);white-space:nowrap;
  cursor:pointer;text-decoration:none;border:none;
}
.btn-large {padding:14px 30px;font-size:var(--text-base)}
.btn-full  {width:100%;justify-content:center}

.btn-primary{background:var(--grad-primary);color:#fff;box-shadow:var(--sh-primary)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 42px rgba(42,140,110,.55)}
.btn-primary:active{transform:translateY(0)}

.btn-secondary{background:rgba(0,196,140,.12);color:var(--secondary);border:1px solid rgba(0,196,140,.3)}
.btn-secondary:hover{background:rgba(0,196,140,.22);transform:translateY(-2px)}

.btn-outline{background:transparent;color:var(--text-secondary);border:1px solid var(--border-soft)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:rgba(42,140,110,.06)}

.btn-white{background:#fff;color:#080B18;font-weight:700}
.btn-white:hover{background:rgba(255,255,255,.9);transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,0,0,.35)}

/* ── Badges ───────────────────────────────────────────────────── */
.section-badge{
  display:inline-flex;align-items:center;gap:var(--sp-2);
  padding:5px 13px;
  background:rgba(42,140,110,.12);color:var(--primary-light);
  border:1px solid rgba(42,140,110,.25);border-radius:var(--r-full);
  font-size:var(--text-xs);font-weight:600;
  letter-spacing:.06em;text-transform:uppercase;
  margin-bottom:var(--sp-4);
}
.badge-purple{background:rgba(127,90,240,.12);color:#A78BFA;border-color:rgba(127,90,240,.25)}
.badge-green {background:rgba(0,196,140,.12); color:var(--secondary);border-color:rgba(0,196,140,.25)}

/* ── Section header ───────────────────────────────────────────── */
.section-header{
  text-align:center;
  max-width:860px;margin:0 auto var(--sp-16);
}
.section-header h2{
  font-size:clamp(var(--text-3xl),5vw,var(--text-5xl));
  color:var(--text);margin-bottom:var(--sp-4);
}
.section-header p{
  font-size:var(--text-lg);color:var(--text-secondary);
  max-width:520px;margin:0 auto;
}

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

/* ── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.1);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.2)}

/* ── Selection ────────────────────────────────────────────────── */
::selection{background:rgba(42,140,110,.35);color:#fff}

/* ── Light / Dark mode tokens ─────────────────────────────────── */
/* Preferencia del sistema */
@media(prefers-color-scheme:light){
  :root{
    --bg:          #F4FAF7;
    --bg-card:     #FFFFFF;
    --bg-card-2:   #EDF7F2;
    --bg-elevated: #E5F2EC;
    --border:      rgba(0,0,0,.08);
    --border-soft: rgba(0,0,0,.15);
    --text:           #0D1117;
    --text-secondary: rgba(13,17,23,.62);
    --text-muted:     rgba(13,17,23,.40);
    --grad-card: linear-gradient(145deg,#FFFFFF 0%,#F4FAF7 100%);
    --sh:         0 4px 16px rgba(0,0,0,.10);
    --sh-lg:      0 12px 40px rgba(0,0,0,.14);
    --sh-primary: 0 8px 32px rgba(42,140,110,.25);
  }
}
/* Toggle manual — clase en <html> */
html.light{
  --bg:          #F4FAF7;
  --bg-card:     #FFFFFF;
  --bg-card-2:   #EDF7F2;
  --bg-elevated: #E5F2EC;
  --border:      rgba(0,0,0,.08);
  --border-soft: rgba(0,0,0,.15);
  --text:           #0D1117;
  --text-secondary: rgba(13,17,23,.62);
  --text-muted:     rgba(13,17,23,.40);
  --grad-card: linear-gradient(145deg,#FFFFFF 0%,#F4FAF7 100%);
  --sh:         0 4px 16px rgba(0,0,0,.10);
  --sh-lg:      0 12px 40px rgba(0,0,0,.14);
  --sh-primary: 0 8px 32px rgba(42,140,110,.25);
}
/* Forzar dark aunque el sistema prefiera light */
html.dark{
  --bg:          #07100C;
  --bg-card:     #0C1811;
  --bg-card-2:   #12201A;
  --bg-elevated: #182B22;
  --border:      rgba(255,255,255,.07);
  --border-soft: rgba(255,255,255,.13);
  --text:           #FFFFFF;
  --text-secondary: rgba(255,255,255,.62);
  --text-muted:     rgba(255,255,255,.35);
  --grad-card: linear-gradient(145deg,#0C1811 0%,#12201A 100%);
  --sh:         0 8px 24px rgba(0,0,0,.4);
  --sh-lg:      0 20px 60px rgba(0,0,0,.5);
  --sh-primary: 0 8px 32px rgba(42,140,110,.35);
}

/* Light mode scrollbar */
html.light ::-webkit-scrollbar-track{background:var(--bg)}
html.light ::-webkit-scrollbar-thumb{background:rgba(0,0,0,.12);border-radius:3px}
html.light ::-webkit-scrollbar-thumb:hover{background:rgba(0,0,0,.22)}

/* ── Theme Toggle Button ──────────────────────────────────────── */
.theme-toggle{
  width:36px;height:36px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r-full);
  background:var(--bg-elevated);
  border:1px solid var(--border-soft);
  color:var(--text-secondary);
  transition:background var(--ease),color var(--ease),border-color var(--ease);
  flex-shrink:0;
}
.theme-toggle:hover{
  background:var(--bg-card-2);
  color:var(--text);
  border-color:var(--primary);
}
.theme-toggle .icon-sun {display:none}
.theme-toggle .icon-moon{display:block}
html.light .theme-toggle .icon-sun {display:block}
html.light .theme-toggle .icon-moon{display:none}

/* ── Logo dark/light switcher ─────────────────────────────────── */
.logo-img-light{display:none}
.logo-img-dark {display:block}
html.light .logo-img-dark {display:none}
html.light .logo-img-light{display:block}
@media(prefers-color-scheme:light){
  html:not(.dark) .logo-img-dark {display:none}
  html:not(.dark) .logo-img-light{display:block}
}