/* ===========================
   VARIABLES
   =========================== */
:root {
    --blue-900: #1a2744;
    --blue-800: #1e3355;
    --blue-700: #2b4a78;
    --blue-600: #3d6399;
    --blue-100: #e9eff8;
    --blue-50: #f4f7fc;
    --amber-500: #c8872b;
    --amber-600: #b37524;
    --amber-100: #fdf4e8;
    --gray-50: #f8f9fb;
    --gray-100: #f1f3f6;
    --gray-200: #e2e5ea;
    --gray-400: #8c919a;
    --gray-600: #4a5568;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --white: #ffffff;
    --whatsapp: #25d366;
    --whatsapp-hover: #1ebe57;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.1), 0 12px 32px rgba(0,0,0,0.08);
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================
   NAVBAR
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--blue-900);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    display: block;
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: 8px;
    transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--blue-900);
    background: var(--blue-50);
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-800);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===========================
   HERO
   =========================== */
.hero {
    background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-800) 50%, var(--blue-700) 100%);
    color: var(--white);
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(200,135,43,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero > .container > p,
.hero-content > p {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    max-width: 600px;
    margin: 0 auto 36px;
    opacity: 0.9;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-languages {
    display: flex;
    gap: 16px;
    justify-content: center;
    font-size: 0.95rem;
    opacity: 0.7;
    font-weight: 300;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-languages .separator {
    opacity: 0.4;
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--amber-500);
    color: var(--white);
    border-color: var(--amber-500);
}

.btn-primary:hover {
    background: var(--amber-600);
    border-color: var(--amber-600);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(200,135,43,0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.7);
    transform: translateY(-2px);
}

/* ===========================
   SECTIONS
   =========================== */
.section {
    padding: 96px 0;
}

.section-alt {
    background: var(--gray-50);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.25rem);
    font-weight: 700;
    color: var(--blue-900);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 640px;
    margin: 0 auto 56px;
    line-height: 1.7;
}

/* ===========================
   ABOUT
   =========================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}

.about-text p {
    margin-bottom: 16px;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--gray-700);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: box-shadow var(--transition), transform var(--transition);
}

.highlight-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.highlight-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--blue-50);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue-700);
}

.highlight-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--blue-900);
    margin-bottom: 2px;
}

.highlight-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
}

/* ===========================
   SERVICES (TRADUCCIONES)
   =========================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.services-grid-2 {
    grid-template-columns: repeat(2, 1fr);
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}

.doc-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.doc-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: box-shadow var(--transition), transform var(--transition);
}

.doc-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.doc-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--blue-900);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--amber-500);
}

.doc-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.doc-card ul li {
    font-size: 0.92rem;
    color: var(--gray-600);
    padding-left: 16px;
    position: relative;
    line-height: 1.5;
}

.doc-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--amber-500);
}

.service-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    transition: box-shadow var(--transition), transform var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.service-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--amber-100);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--amber-500);
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ===========================
   CONFIDENCIALIDAD
   =========================== */
.confidencialidad {
    text-align: center;
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-top: 40px;
    font-style: italic;
}

/* ===========================
   CLIENTES
   =========================== */
.clientes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.cliente-item {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 20px 16px;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--blue-900);
    transition: box-shadow var(--transition), transform var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
}

.cliente-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
    background: var(--white);
}

/* ===========================
   CTP LINK
   =========================== */
.ctp-link {
    color: var(--blue-900);
    text-decoration: none;
    transition: color var(--transition);
}

.ctp-link:hover {
    color: var(--amber-500);
}

/* ===========================
   TEACHING (ENSEÑANZA)
   =========================== */
.teaching-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}

.teaching-info p {
    font-size: 1.05rem;
    margin-bottom: 16px;
    line-height: 1.8;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.6;
}

.feature-item svg {
    flex-shrink: 0;
    margin-top: 3px;
    color: var(--amber-500);
}

/* ===========================
   CONTACT
   =========================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 48px;
}

.contact-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: box-shadow var(--transition);
}

.contact-card:hover {
    box-shadow: var(--shadow);
}

.contact-card-link {
    cursor: pointer;
    transition: box-shadow var(--transition), transform var(--transition);
}

.contact-card-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.contact-card-link p {
    color: var(--amber-500);
    font-weight: 500;
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    background: var(--blue-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue-700);
}

.contact-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.contact-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
}

/* WhatsApp CTA */
.whatsapp-cta {
    text-align: center;
}

.btn-whatsapp {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 40px;
    background: var(--whatsapp);
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 60px;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(37,211,102,0.3);
}

.btn-whatsapp:hover {
    background: var(--whatsapp-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(37,211,102,0.4);
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 48px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 24px;
}

.footer-brand .logo {
    color: var(--white);
    display: block;
    margin-bottom: 8px;
}

.footer-brand p {
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--gray-400);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-ctp {
    text-align: center;
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-ctp a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--amber-500);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

.footer-ctp a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    font-size: 0.85rem;
}

/* ===========================
   ANIMATIONS
   =========================== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 900px) {
    .about-grid,
    .teaching-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .services-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }

    .doc-categories {
        grid-template-columns: repeat(2, 1fr);
    }

    .clientes-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .section {
        padding: 72px 0;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow);
    }

    .nav-links.open {
        display: flex;
    }

    .hero {
        padding: 130px 0 72px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .doc-categories {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    .hero-languages {
        font-size: 0.8rem;
    }
}