/* =====================================================
   IMDESWEB - Hoja de estilos principal
   ===================================================== */

:root {
    /* Colores */
    --color-bg: #0d1117;
    --color-surface: #161b22;
    --color-surface-alt: #1c2330;
    --color-border: #30363d;
    --color-text: #e6edf3;
    --color-text-muted: #8b949e;
    --color-primary: #00d4ff;
    --color-primary-hover: #00b8e6;
    --color-primary-dim: rgba(0, 212, 255, 0.1);
    --color-accent: #7c5cff;
    --color-success: #3fb950;
    --color-error: #f85149;

    /* Tipografía */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    /* Espaciado */
    --radius: 12px;
    --radius-sm: 8px;
    --max-width: 1200px;
    --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);

    /* Sombra por defecto (tema oscuro) */
    --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.3);
    --shadow-header: rgba(0, 0, 0, 0.3);
    --color-header-bg: rgba(13, 17, 23, 0.85);
}

/* =====================================================
   TEMA CLARO - Tonos claros con gama de azules
   ===================================================== */

[data-theme="light"] {
    --color-bg: #eef4fb;
    --color-surface: #ffffff;
    --color-surface-alt: #e3eef7;
    --color-border: #b8cee0;
    --color-text: #1a2744;
    --color-text-muted: #5a7090;
    --color-primary: #1d4ed8;
    --color-primary-hover: #1e40af;
    --color-primary-dim: rgba(29, 78, 216, 0.1);
    --color-accent: #0ea5e9;
    --color-success: #059669;
    --color-error: #dc2626;
    --shadow-card: 0 12px 40px rgba(30, 64, 175, 0.12);
    --shadow-header: rgba(30, 64, 175, 0.08);
    --color-header-bg: rgba(238, 244, 251, 0.9);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1,6;
    font-size: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* =====================================================
   HEADER
   ===================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 3px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
}

.logo:hover {
    color: var(--color-text);
}

.logo-text {
    letter-spacing: -0.02em;
}

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

.main-nav a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-text);
    background: var(--color-surface-alt);
}

/* Menu toggle (mobile) */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* =====================================================
   HERO
   ===================================================== */
.hero {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-primary-dim) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.hero-text h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-body {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 28px;
    max-width: 520px;
}

.hero-image img {
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    aspect-ratio: 4/3;
    object-fit: cover;
    width: 100%;
}

/* =====================================================
   SECCIONES
   ===================================================== */
.section {
    padding: 64px 0;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 48px;
}

.section-intro {
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
}

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

.mt-2 { margin-top: 32px; }
.mt-3 { margin-top: 48px; }
.mb-2 { margin-bottom: 32px; }

/* =====================================================
   PAGE HERO (páginas internas)
   ===================================================== */
.page-hero {
    padding: 64px 0 40px;
    background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
    text-align: center;
}

.page-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.page-hero p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* =====================================================
   TWO COLUMN LAYOUT
   ===================================================== */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.col-text h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin-bottom: 16px;
}

.col-text p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.col-image img {
    border-radius: var(--radius);
    aspect-ratio: 4/3;
    object-fit: cover;
    width: 100%;
    box-shadow: var(--shadow-card);
}

/* =====================================================
   SERVICES GRID
   ===================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all var(--transition);
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.service-icon {
    margin-bottom: 20px;
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* =====================================================
   SERVICES DETAILED
   ===================================================== */
.services-detailed {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.service-detail-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    position: relative;
    transition: all var(--transition);
}

.service-detail-card:hover {
    border-color: var(--color-primary);
}

.service-detail-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    margin-bottom: 8px;
}

.service-detail-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.service-detail-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* =====================================================
   PORTFOLIO
   ===================================================== */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.filter-btn {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.portfolio-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
    display: block;
    color: var(--color-text);
}

.portfolio-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    color: var(--color-text);
}

.portfolio-img img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-img img {
    transform: scale(1.05);
}

.portfolio-info {
    padding: 20px;
}

.portfolio-cat {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: 8px;
    font-weight: 600;
}

.portfolio-info h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.portfolio-info p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.portfolio-client {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* =====================================================
   STATS
   ===================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 32px 16px;
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
}

/* =====================================================
   CTA SECTION
   ===================================================== */
.cta-section {
    background: var(--color-surface);
}

.cta-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.cta-image img {
    border-radius: var(--radius);
    aspect-ratio: 4/3;
    object-fit: cover;
    width: 100%;
}

.cta-text h2 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin-bottom: 16px;
}

.cta-text p {
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

.cta-image-full {
    border-radius: var(--radius);
    overflow: hidden;
}

.cta-image-full img {
    width: 100%;
    aspect-ratio: 21/9;
    object-fit: cover;
}

/* =====================================================
   CONTACT FORM
   ===================================================== */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-item {
    padding: 12px 16px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    font-family: var(--font-body);
    text-align: center;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: var(--color-bg);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-bg);
}

.btn-secondary {
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-border);
}

/* =====================================================
   ALERTS
   ===================================================== */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.alert-success {
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.alert-error {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

.alert ul {
    list-style: none;
}

/* =====================================================
   FOOTER
   ===================================================== */
.site-footer {
    margin-top: auto;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding-top: 48px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 32px;
}

.footer-col h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.footer-col h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.footer-col p,
.footer-col a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-nav {
    list-style: none;
}

.footer-nav li {
    margin-bottom: 6px;
}

.social-links {
    display: flex;
    gap: 8px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-surface-alt);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.8rem;
    font-weight: 700;
    transition: all var(--transition);
}

.social-links a:hover {
    background: var(--color-primary);
    color: var(--color-bg);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 900px) {
    .hero-content,
    .cta-inner,
    .two-col {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero {
        padding: 48px 0;
    }

    .footer-inner {
        grid-template-columns: 1fr 1fr;
    }
}

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

    .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 16px;
    }

    .main-nav.open {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .main-nav a {
        display: block;
        padding: 12px 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 40px 0;
    }
}

/* =====================================================
   THEME TOGGLE BUTTON
   ===================================================== */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    cursor: pointer;
    color: var(--color-text);
    transition: all var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* El toggle en el header, fuera del nav */
.theme-toggle {
    margin-left: 8px;
}

@media (max-width: 768px) {
    .theme-toggle {
        position: absolute;
        right: 60px;
        top: 17px;
        margin-left: 0;
    }
}

/* =====================================================
   FAQ SECTION
   ===================================================== */
.faq-section {
    padding: 64px 0;
    background: var(--color-surface);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--transition);
}

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

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-text);
    user-select: none;
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    flex-shrink: 0;
    margin-left: 16px;
    transition: transform var(--transition);
}

.faq-item.open .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: 0 24px 20px;
}

.faq-contact-cta {
    text-align: center;
    margin-top: 40px;
    padding: 32px;
    background: var(--color-primary-dim);
    border-radius: var(--radius);
}

.faq-contact-cta p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
}