/* ============================================
   SISTEMA DE FUENTES LOCALES AUTO-ALOJADAS (OPTIMIZADO)
   ============================================ */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/inter-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/plus-jakarta-sans-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/plus-jakarta-sans-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/plus-jakarta-sans-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('../fonts/plus-jakarta-sans-800.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ============================================
   CSS VARIABLES — Sistema de diseño unificado
   ============================================ */
:root {
    --color-primary:        #2D6A4F;
    --color-primary-light:  #40916C;
    --color-secondary:      #74C69D;
    --color-accent:         #E07A5F;
    --color-accent-hover:   #D85D3E;

    --bg-main:      #FAFAF8;
    --bg-card:      #FFFFFF;
    --bg-section:   #F3FAF6;
    --bg-dark:      #1A1D27;

    --text-primary:   #1A1A2E;
    --text-secondary: #6B7280;
    --text-white:     #FFFFFF;

    --shadow-soft:    0 2px 8px rgba(0,0,0,0.06);
    --shadow-premium: 0 8px 24px rgba(0,0,0,0.08);
    --shadow-hover:   0 16px 40px rgba(45,106,79,0.12);

    --radius-sm:  8px;
    --radius-md:  12px;
    --radius-lg:  20px;
    --radius-xl:  28px;

    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body:    'Inter', sans-serif;

    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    --container-max: 1200px;
    --container-pad: 1.5rem;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img, svg {
    max-width: 100%;
    display: block;
}

ul { list-style: none; }

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

.text-center { text-align: center; }

/* ============================================
   HEADER & NAV
   ============================================ */
header {
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.logo-icon {
    width: 34px;
    height: 34px;
    background: var(--color-primary);
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.main-nav a:hover { color: var(--color-primary); }

.nav-cta { flex-shrink: 0; }

/* Hamburger */
.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.25rem;
    flex-shrink: 0;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    background: white;
    border-top: 1px solid rgba(0,0,0,0.06);
    padding: 1.5rem var(--container-pad);
}

.mobile-menu.open { display: block; }

.mobile-menu ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu .mobile-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid #F3F4F6;
}

.mobile-menu .mobile-link:hover { color: var(--color-primary); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(224,122,95,0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: white;
}

.btn-lg {
    padding: 0.9rem 2rem;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: 5rem 0 4rem;
    background: linear-gradient(160deg, #F0F9F4 0%, var(--bg-main) 60%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -120px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(116,198,157,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(45,106,79,0.08);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border-radius: 30px;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(45,106,79,0.15);
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    max-width: 800px;
    margin: 0 auto 1.25rem;
    color: var(--text-primary);
}

.highlight { color: var(--color-primary); }

.hero-sub {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat strong {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.stat span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: #D1FAE5;
}

/* ============================================
   SECCIÓN: CALCULADORAS
   ============================================ */
.section-calculadoras {
    padding: 5rem 0;
}

.section-header {
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.section-sub {
    color: var(--text-secondary);
    font-size: 1rem;
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

/* Calculator Card */
.calc-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid rgba(0,0,0,0.05);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.calc-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transition: transform 0.25s ease;
    transform-origin: left;
}

.calc-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(116,198,157,0.3);
}

.calc-card:hover::after { transform: scaleX(1); }

.calc-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.calc-icon {
    width: 50px;
    height: 50px;
    background: rgba(116,198,157,0.12);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.4rem;
    flex-shrink: 0;
}

.badge-popular {
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.calc-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.calc-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex: 1;
    margin-bottom: 1.25rem;
}

.calc-cta {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.875rem;
    margin-top: auto;
}

.calc-cta i { font-size: 0.65rem; transition: transform 0.2s; }
.calc-card:hover .calc-cta i { transform: translateX(4px); }

/* ============================================
   SECCIÓN: CÓMO FUNCIONA
   ============================================ */
.section-como-funciona {
    padding: 5rem 0;
    background: var(--bg-section);
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.step-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    flex: 1;
    min-width: 220px;
    max-width: 300px;
    box-shadow: var(--shadow-soft);
    position: relative;
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.9rem;
}

.step-icon {
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: 1rem;
    margin-top: 0.5rem;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.step-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.step-arrow {
    color: var(--color-secondary);
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* ============================================
   SECCIÓN: POR QUÉ NOSOTROS
   ============================================ */
.section-porque {
    padding: 5rem 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}

.feature-card {
    text-align: center;
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid #F3F4F6;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-soft);
    transform: translateY(-4px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: rgba(116,198,157,0.12);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   SECCIÓN: FAQ
   ============================================ */
.section-faq {
    padding: 5rem 0;
    background: var(--bg-main);
}

.faq-inner {
    max-width: 760px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid #E5E7EB;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover { border-color: var(--color-secondary); }

.faq-item[open] {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-soft);
}

.faq-item summary {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    color: var(--text-primary);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 300;
    line-height: 1;
    transition: transform 0.2s;
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 1.5rem 1.25rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid #F3F4F6;
    padding-top: 1rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-dark);
    color: white;
    margin-top: 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 3.5fr 1fr;
    gap: 3rem;
    padding-top: 4rem;
    padding-bottom: 3rem;
}

.footer-brand .logo {
    margin-bottom: 0.75rem;
}

.footer-tagline {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.footer-desc {
    font-size: 0.85rem;
    color: #9CA3AF;
    line-height: 1.6;
    max-width: 280px;
}

.footer-nav h4, .footer-nav-wide h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-nav ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-nav-wide ul {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem 1.5rem;
}

.footer-nav a, .footer-nav-wide a {
    font-size: 0.85rem;
    color: #9CA3AF;
    transition: var(--transition);
}

.footer-nav a:hover, .footer-nav-wide a:hover { color: var(--color-secondary); }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 1.5rem 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: #6B7280;
    line-height: 1.6;
}

.footer-bottom .disclaimer {
    margin-top: 0.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   RESPONSIVE — TABLET
   ============================================ */
@media (max-width: 900px) {
    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }
    .footer-brand {
        grid-column: 1 / -1;
    }
    .footer-nav-wide ul {
        grid-template-columns: repeat(2, 1fr);
    }
    .step-arrow { display: none; }
    .steps-grid { gap: 2rem; }
}

/* ============================================
   RESPONSIVE — MÓVIL
   ============================================ */
@media (max-width: 768px) {
    :root { --container-pad: 1rem; }

    /* Nav */
    .main-nav { display: none; }
    .nav-cta { display: none; }
    .hamburger { display: flex; }

    /* Hero */
    .hero { padding: 3rem 0 2.5rem; }
    .hero h1 { font-size: 1.9rem; }
    .hero-sub { font-size: 1rem; }
    .hero-btns { flex-direction: column; align-items: center; }
    .hero-btns .btn { width: 100%; max-width: 320px; justify-content: center; }
    .hero-stats { gap: 1.25rem; }
    .stat strong { font-size: 1.4rem; }

    /* Calculadoras */
    .calculators-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Secciones */
    .section-calculadoras,
    .section-como-funciona,
    .section-porque,
    .section-faq { padding: 3rem 0; }

    .section-header { margin-bottom: 2rem; }
    .section-header h2 { font-size: 1.75rem; }

    /* Steps */
    .step-card { min-width: 100%; max-width: 100%; }

    /* Features */
    .features-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
    .feature-card { padding: 1.25rem 1rem; }

    /* Footer */
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding-top: 3rem;
        padding-bottom: 2rem;
    }
    .footer-brand { grid-column: auto; }
    .footer-desc { max-width: 100%; }
    .footer-nav-wide ul {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .features-grid { grid-template-columns: 1fr; }
    .hero-badge { font-size: 0.72rem; text-align: center; }
    .stat-divider { display: none; }
    .hero-stats { gap: 1.5rem; }
    .footer-nav-wide ul {
        grid-template-columns: 1fr;
    }
}