/* =============================================
   TaskIn - Estilos principales
   ============================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --accent: #06b6d4;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #0f172a;
  --dark2: #1e293b;
  --dark3: #334155;
  --gray: #64748b;
  --light: #f8fafc;
  --white: #ffffff;
  --border: #e2e8f0;
  --gradient: linear-gradient(135deg, #6366f1, #06b6d4);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 20px;
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background: var(--white); color: var(--dark); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ── NAVBAR ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}
.navbar.scrolled { box-shadow: var(--shadow); }
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 22px; font-weight: 800; }
.logo-icon { font-size: 24px; }
.logo-accent { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--gray); transition: color 0.2s; }
.nav-links a:hover { color: var(--primary); }
.btn-nav { background: var(--primary); color: white !important; padding: 8px 20px; border-radius: 8px; font-weight: 600 !important; }
.btn-nav:hover { background: var(--primary-dark) !important; }
.hamburger { display: none; background: none; border: none; font-size: 24px; cursor: pointer; }
.mobile-menu { display: none; flex-direction: column; padding: 16px 24px; gap: 16px; border-top: 1px solid var(--border); }
.mobile-menu a { font-size: 16px; font-weight: 500; color: var(--gray); }
.mobile-menu.open { display: flex; }

/* ── HERO ── */
.hero { position: relative; padding: 140px 0 100px; overflow: hidden; background: var(--dark); }
.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(99,102,241,0.3) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(6,182,212,0.2) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 1; text-align: center; }
.hero-badge { display: inline-block; background: rgba(99,102,241,0.2); border: 1px solid rgba(99,102,241,0.4); color: var(--primary-light); padding: 6px 16px; border-radius: 100px; font-size: 14px; font-weight: 600; margin-bottom: 24px; }
.hero-title { font-size: clamp(36px, 6vw, 72px); font-weight: 900; color: white; line-height: 1.1; margin-bottom: 24px; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: clamp(16px, 2vw, 20px); color: #94a3b8; max-width: 640px; margin: 0 auto 40px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.btn-primary { background: var(--gradient); color: white; padding: 14px 32px; border-radius: 10px; font-size: 16px; font-weight: 700; transition: transform 0.2s, box-shadow 0.2s; box-shadow: 0 4px 20px rgba(99,102,241,0.4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(99,102,241,0.5); }
.btn-secondary { background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.2); padding: 14px 32px; border-radius: 10px; font-size: 16px; font-weight: 600; transition: all 0.2s; }
.btn-secondary:hover { background: rgba(255,255,255,0.2); }
.hero-stats { display: flex; justify-content: center; align-items: center; gap: 40px; }
.stat { text-align: center; }
.stat-num { display: block; font-size: 32px; font-weight: 800; color: white; }
.stat-label { font-size: 14px; color: #64748b; }
.stat-divider { width: 1px; height: 48px; background: rgba(255,255,255,0.1); }

/* ── SECCIONES ── */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-badge { display: inline-block; background: rgba(99,102,241,0.1); color: var(--primary); padding: 4px 16px; border-radius: 100px; font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 16px; }
.section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin-bottom: 16px; }
.section-subtitle { font-size: 18px; color: var(--gray); max-width: 560px; margin: 0 auto; }

/* ── FEATURES ── */
.features { background: var(--light); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.feature-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: transform 0.2s, box-shadow 0.2s; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { font-size: 36px; margin-bottom: 16px; }
.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--gray); line-height: 1.7; }

/* ── COMO FUNCIONA ── */
.how-it-works { background: var(--dark); }
.how-it-works .section-title { color: white; }
.steps { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; }
.step { background: var(--dark2); border: 1px solid var(--dark3); border-radius: var(--radius-lg); padding: 32px; max-width: 260px; text-align: center; }
.step-num { width: 48px; height: 48px; background: var(--gradient); color: white; font-size: 20px; font-weight: 800; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.step h3 { color: white; font-size: 18px; margin-bottom: 10px; }
.step p { color: #94a3b8; font-size: 14px; }
.step-arrow { font-size: 32px; color: var(--primary); }

/* ── PLANES ── */
.plans-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; margin-bottom: 32px; }
.plan-card { background: white; border: 2px solid var(--border); border-radius: var(--radius-lg); padding: 32px; position: relative; transition: transform 0.2s, box-shadow 0.2s; }
.plan-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.plan-popular { border-color: var(--primary); }
.plan-zero { border-color: var(--accent); background: linear-gradient(to bottom, rgba(6,182,212,0.05), white); }
.plan-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--primary); color: white; padding: 4px 16px; border-radius: 100px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.plan-badge-zero { background: var(--gradient); }
.plan-header h3 { font-size: 22px; font-weight: 800; margin-bottom: 12px; }
.plan-price { margin-bottom: 8px; }
.price-amount { font-size: 40px; font-weight: 900; color: var(--primary); }
.price-period { font-size: 16px; color: var(--gray); }
.plan-header p { font-size: 13px; color: var(--gray); margin-bottom: 24px; }
.plan-features { list-style: none; margin-bottom: 28px; }
.plan-features li { font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--light); color: var(--dark3); }
.btn-plan { display: block; text-align: center; padding: 12px; border-radius: 8px; font-weight: 700; font-size: 15px; background: var(--light); color: var(--dark); border: 2px solid var(--border); transition: all 0.2s; }
.btn-plan:hover { background: var(--primary); color: white; border-color: var(--primary); }
.btn-plan-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-plan-zero { background: var(--gradient); color: white; border: none; }
.plans-note { text-align: center; font-size: 14px; color: var(--gray); }

/* ── CONTACTO ── */
.contact { background: var(--light); }
.contact-wrapper { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; align-items: start; }
.contact-item { display: flex; gap: 16px; margin-bottom: 28px; align-items: flex-start; }
.contact-icon { font-size: 24px; }
.contact-item strong { display: block; font-size: 15px; margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--gray); }
.contact-form { background: white; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--dark2); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px; border: 1.5px solid var(--border);
  border-radius: 8px; font-size: 14px; font-family: inherit;
  transition: border-color 0.2s; outline: none; color: var(--dark);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); }
.form-group textarea { resize: vertical; }
.btn-submit { width: 100%; padding: 14px; background: var(--gradient); color: white; border: none; border-radius: 8px; font-size: 16px; font-weight: 700; cursor: pointer; transition: opacity 0.2s; }
.btn-submit:hover { opacity: 0.9; }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.form-success { display: none; margin-top: 16px; padding: 14px; background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #16a34a; border-radius: 8px; font-size: 14px; }
.form-error { display: none; margin-top: 16px; padding: 14px; background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #dc2626; border-radius: 8px; font-size: 14px; }

/* ── FOOTER ── */
.footer { background: var(--dark); padding: 60px 0 0; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .logo-text { font-size: 22px; font-weight: 800; color: white; margin-bottom: 12px; display: block; }
.footer-brand p { font-size: 14px; color: #64748b; max-width: 280px; margin-top: 8px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links strong { color: white; font-size: 14px; margin-bottom: 4px; }
.footer-links a, .footer-links p { font-size: 14px; color: #64748b; transition: color 0.2s; }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom { border-top: 1px solid var(--dark3); padding: 20px 0; text-align: center; }
.footer-bottom p { font-size: 13px; color: #475569; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: block; }
  .hero-stats { gap: 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
  .plans-grid { grid-template-columns: 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: 32px; }
}