/* ============================================
   DPS Projects - Main Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #99cc33;
    --color-primary-dark: #7ab82d;
    --color-secondary: #0995a1;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #333333;
    --color-text-tertiary: #555555;
    --color-bg-light: #f3f4f6;
    --color-white: #ffffff;
    --color-success: #10b981;
    --color-error: #ef4444;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-h1-hero: 3rem;
    --font-size-h1: 2.5rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;
    --font-size-h4: 1.25rem;
    --font-size-body-lg: 1.125rem;
    --font-size-body: 1rem;
    --font-size-small: 0.875rem;
    
    /* Spacing */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-body-lg);
    line-height: 1.6;
    color: var(--color-text-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
    margin-bottom: var(--space-3);
}

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

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

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

/* Container & Grid */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--space-3) * -0.5);
}

.col-md-2,
.col-md-3,
.col-md-4,
.col-md-6,
.col-md-12 {
    padding: 0 calc(var(--space-3) * 0.5);
    width: 100%;
}

@media (min-width: 768px) {
    .col-md-2 { width: 16.666%; }
    .col-md-3 { width: 25%; }
    .col-md-4 { width: 33.333%; }
    .col-md-6 { width: 50%; }
    .col-md-12 { width: 100%; }
}

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

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

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

/* Section Padding */
.section-padding {
    padding: var(--space-10) 0;
}

/* Section Header */
.section-header {
    margin-bottom: var(--space-8);
}

.section-title {
    font-size: var(--font-size-h1);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
}

.section-subtitle {
    font-size: var(--font-size-body);
    color: var(--color-text-tertiary);
    max-width: 700px;
    margin: 0 auto var(--space-3);
}

.section-divider {
    width: 70px;
    height: 3px;
    background: var(--color-primary);
    margin: var(--space-3) auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: var(--font-size-body);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 30px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(153, 204, 51, 0.3);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(153, 204, 51, 0.4);
    color: var(--color-white);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-block {
    width: 100%;
    display: block;
}

/* Header / Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-base);
    padding: var(--space-3) 0;
}

.header.scrolled {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: var(--space-2) 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-4);
    margin: 0;
}

.nav-link {
    color: var(--color-white);
    font-weight: 600;
    font-size: var(--font-size-body);
    text-transform: uppercase;
    padding: var(--space-1) var(--space-2);
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-1);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-white);
    transition: all var(--transition-base);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background: rgba(26, 26, 26, 0.98);
        flex-direction: column;
        padding: var(--space-4);
        transition: right var(--transition-base);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #1a1a1a 0%, #0d1117 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(9, 149, 161, 0.1) 0%, transparent 70%);
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-h1-hero);
    color: var(--color-white);
    margin-bottom: var(--space-3);
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: var(--font-size-h3);
    color: var(--color-white);
    margin-bottom: var(--space-2);
    font-weight: 400;
}

.hero-description {
    font-size: var(--font-size-body-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-6);
}

.hero-cta {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 0; transform: translateX(-50%) translateY(0); }
    50% { opacity: 1; transform: translateX(-50%) translateY(10px); }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* About Section */
.about-section {
    background: var(--color-white);
}

.about-image {
    margin-bottom: var(--space-4);
}

.about-text {
    font-size: var(--font-size-body-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.value-card {
    background: var(--color-white);
    padding: var(--space-4);
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    text-align: center;
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.value-icon {
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.value-card h4 {
    font-size: var(--font-size-h4);
    margin-bottom: var(--space-1);
}

.value-card p {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
    margin: 0;
}

/* Mission Section */
.mission-section {
    /* background-image: url('../img/hero/mission-bg.jpg'); -- agregar imagen después */
    background-color: #1a1a1a;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    padding: var(--space-10) 0;
}

.parallax-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.85);
}

.mission-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.mission-title {
    font-size: var(--font-size-h1);
    color: var(--color-white);
    margin-bottom: var(--space-3);
}

.mission-text {
    font-size: var(--font-size-h4);
    color: var(--color-white);
    line-height: 1.8;
}

/* Offerings Section */
.offerings-section {
    background: var(--color-white);
}

.offerings-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 28px;
    background: transparent;
    border: 2px solid #e5e7eb;
    border-radius: 30px;
    font-size: var(--font-size-body);
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeInUp 0.4s ease-out;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-4);
}

.service-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 16px;
    padding: var(--space-5);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(153, 204, 51, 0.2);
    border-color: rgba(153, 204, 51, 0.3);
}

.service-icon {
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.service-card h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--space-2);
}

.service-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
}

.service-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-1);
}

.service-list li {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
    padding-left: 20px;
    position: relative;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.service-list-detailed {
    list-style: none;
}

.service-list-detailed li {
    padding: var(--space-1) 0;
    padding-left: 24px;
    position: relative;
}

.service-list-detailed li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.expertise-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto var(--space-6);
    font-size: var(--font-size-body-lg);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.expertise-item {
    text-align: center;
    padding: var(--space-4);
    background: var(--color-bg-light);
    border-radius: 12px;
    transition: all var(--transition-base);
}

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

.expertise-icon {
    font-size: var(--font-size-h3);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

/* Portfolio Section */
.portfolio-section {
    background: var(--color-bg-light);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--color-white);
    border: 2px solid transparent;
    border-radius: 20px;
    font-size: var(--font-size-small);
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.portfolio-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.portfolio-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.portfolio-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
    padding: var(--space-3);
    text-align: center;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    color: var(--color-white);
    font-size: var(--font-size-h4);
    margin-bottom: var(--space-1);
}

.portfolio-overlay p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-small);
    margin-bottom: var(--space-2);
}

.portfolio-overlay svg {
    color: var(--color-primary);
    width: 32px;
    height: 32px;
}

/* Contact Section */
.contact-section {
    background: var(--color-white);
}

.contact-form {
    background: var(--color-white);
    padding: var(--space-5);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.form-group {
    position: relative;
    margin-bottom: var(--space-4);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--font-size-body);
    font-family: var(--font-family);
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    transition: all var(--transition-base);
    background: var(--color-white);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(153, 204, 51, 0.1);
}

.form-label {
    position: absolute;
    top: 14px;
    left: 16px;
    font-size: var(--font-size-body);
    color: var(--color-text-tertiary);
    pointer-events: none;
    transition: all var(--transition-base);
    background: var(--color-white);
    padding: 0 4px;
}

.form-control:focus + .form-label,
.form-control:not(:placeholder-shown) + .form-label {
    top: -10px;
    left: 12px;
    font-size: var(--font-size-small);
    color: var(--color-primary);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    margin-top: var(--space-3);
    padding: var(--space-2);
    border-radius: 8px;
    display: none;
}

.form-message.success {
    background: #d1fae5;
    color: var(--color-success);
    display: block;
}

.form-message.error {
    background: #fee2e2;
    color: var(--color-error);
    display: block;
}

.contact-info {
    margin-bottom: var(--space-4);
}

.info-card {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-bg-light);
    border-radius: 12px;
    margin-bottom: var(--space-3);
    transition: all var(--transition-base);
}

.info-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.info-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.info-content h4 {
    font-size: var(--font-size-h4);
    margin-bottom: var(--space-1);
}

.info-content p {
    font-size: var(--font-size-small);
    color: var(--color-text-tertiary);
    margin: 0;
}

.map-container {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* Footer */
.site-footer {
    background: var(--color-text-primary);
    color: var(--color-white);
    padding: var(--space-8) 0 var(--space-4);
}

.footer-top {
    margin-bottom: var(--space-6);
}

.footer-widget {
    margin-bottom: var(--space-4);
}

.footer-logo {
    height: 50px;
    margin-bottom: var(--space-3);
}

.footer-widget h4 {
    color: var(--color-white);
    font-size: var(--font-size-h4);
    margin-bottom: var(--space-3);
}

.footer-widget p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-small);
}

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

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-small);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-4);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-small);
    margin: 0;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-h1-hero: 2rem;
        --font-size-h1: 1.75rem;
        --font-size-h2: 1.5rem;
        --font-size-h3: 1.25rem;
        --space-10: 48px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .values-grid,
    .services-grid,
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}