/* ===================================
   OPTIMO - Firma Budowlana
   Modern Dark Theme with Parallax
   =================================== */

/* CSS Variables */
:root {
    --color-dark: #1A1A2E;
    --color-darker: #0F0F1A;
    --color-accent: #C0392B;
    --color-accent-light: #E74C3C;
    --color-accent-dark: #922B21;
    --color-concrete: #BDC3C7;
    --color-concrete-light: #ECF0F1;
    --color-text: #FFFFFF;
    --color-text-muted: #95A5A6;
    --color-card-bg: rgba(255, 255, 255, 0.05);
    --color-card-border: rgba(255, 255, 255, 0.1);

    --font-primary: 'Poppins', sans-serif;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 5px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);

    --container-width: 1200px;
    --section-padding: 100px;
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-darker);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background-color: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 60px;
    width: auto;
    transition: transform var(--transition-normal);
}

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

.logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--color-text);
}

.logo-text::first-letter {
    color: var(--color-accent);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link-cta {
    background-color: var(--color-accent);
    padding: 10px 25px;
    border-radius: 5px;
    font-weight: 600;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background-color: var(--color-accent-light);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-parallax {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center center / cover no-repeat;
    transform: translateZ(0);
    will-change: transform;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(26, 26, 46, 0.95) 0%,
        rgba(26, 26, 46, 0.8) 50%,
        rgba(192, 57, 43, 0.3) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 20px;
    max-width: 900px;
}

.hero-title {
    margin-bottom: 25px;
}

.hero-title-small {
    display: block;
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 8px;
    text-transform: uppercase;
    color: var(--color-concrete-light);
    margin-bottom: 10px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.3s;
}

.hero-title-big {
    display: block;
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.5s;
}

.hero-title-big::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background-color: var(--color-accent);
    margin: 25px auto 0;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--color-concrete-light);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.7s;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.9s;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 35px;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    border-radius: 5px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-light);
    border-color: var(--color-accent-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-text);
}

.btn-outline:hover {
    background-color: var(--color-text);
    color: var(--color-dark);
    transform: translateY(-3px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.2s;
}

.scroll-text {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-concrete);
}

.scroll-arrow {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-concrete);
    border-radius: 15px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 10px;
    background-color: var(--color-accent);
    border-radius: 2px;
    animation: scrollBounce 2s ease-in-out infinite;
}

/* ===================================
   SECTIONS - COMMON STYLES
   =================================== */
.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header-light {
    color: var(--color-text);
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
}

.section-header-light .section-desc {
    color: var(--color-concrete);
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about {
    background-color: var(--color-dark);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content p {
    margin-bottom: 20px;
    color: var(--color-concrete);
}

.about-lead {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--color-text) !important;
    line-height: 1.5;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.stat-item {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
}

.stat-suffix {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent);
}

.stat-label {
    display: block;
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--color-concrete);
}

/* ===================================
   SERVICES SECTION
   =================================== */
.services {
    background-color: var(--color-darker);
    position: relative;
    overflow: hidden;
}

.services-parallax {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center center / cover no-repeat fixed;
    opacity: 0.1;
}

.services .container {
    position: relative;
    z-index: 1;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--color-card-border);
    border-radius: 15px;
    padding: 40px 30px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-icon svg {
    width: 35px;
    height: 35px;
    color: var(--color-text);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.service-list {
    margin-bottom: 25px;
}

.service-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: var(--color-concrete);
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--color-accent);
    transition: all var(--transition-fast);
}

.service-link:hover {
    color: var(--color-accent-light);
    gap: 15px;
}

.services-note {
    text-align: center;
    margin-top: 50px;
    padding: 25px;
    background: var(--color-card-bg);
    border-radius: 10px;
    border-left: 4px solid var(--color-accent);
}

.services-note p {
    color: var(--color-concrete);
    font-style: italic;
}

/* ===================================
   WHY US SECTION
   =================================== */
.why-us {
    background-color: var(--color-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    transition: all var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(192, 57, 43, 0.2), rgba(192, 57, 43, 0.1));
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    transition: all var(--transition-normal);
}

.feature-item:hover .feature-icon {
    background: var(--color-accent);
}

.feature-icon svg {
    width: 35px;
    height: 35px;
    color: var(--color-accent);
    transition: color var(--transition-normal);
}

.feature-item:hover .feature-icon svg {
    color: var(--color-text);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--color-concrete);
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact {
    background-color: var(--color-darker);
    position: relative;
    overflow: hidden;
}

.contact-parallax {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center center / cover no-repeat fixed;
    opacity: 0.08;
}

.contact .container {
    position: relative;
    z-index: 1;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 15px;
    padding: 40px;
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--color-accent);
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.contact-item svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 3px;
}

.contact-item a {
    color: var(--color-accent);
}

.contact-item a:hover {
    color: var(--color-accent-light);
    text-decoration: underline;
}

.contact-item strong {
    display: block;
    margin-bottom: 5px;
    color: var(--color-text);
}

/* Contact Form */
.contact-form {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 15px;
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 15px 20px;
    font-family: var(--font-primary);
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-card-border);
    border-radius: 8px;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-muted);
}

.contact-form select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2395A5A6' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
}

.contact-form select option {
    background-color: var(--color-dark);
    color: var(--color-text);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.08);
}

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

/* ===================================
   FOOTER
   =================================== */
.footer {
    background-color: var(--color-dark);
    padding: 30px 0;
}

.partners {
    text-align: center;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--color-card-border);
    margin-bottom: 40px;
}

.partners-title {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 30px;
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
}

.partner-logo {
    width: 120px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: opacity var(--transition-normal);
    filter: grayscale(100%);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo .logo-text {
    font-size: 1.5rem;
}

.footer-logo-img {
    height: 65px;
    width: auto;
}

.footer-copy {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 30px;
}

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

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

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes scrollBounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(15px);
    }
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.8s ease;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.8s ease;
}

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }

    .hero-title-big {
        font-size: 3.5rem;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }

    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--color-dark);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        padding: 40px;
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.2rem;
    }

    .nav-link-cta {
        text-align: center;
    }

    /* Hero */
    .hero-title-small {
        font-size: 1.1rem;
        letter-spacing: 4px;
    }

    .hero-title-big {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .btn {
        padding: 14px 30px;
        width: 100%;
        justify-content: center;
    }

    /* Sections */
    .section-title {
        font-size: 2rem;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .stat-item {
        padding: 20px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .partners-logos {
        gap: 30px;
    }

    .partner-logo {
        width: 100px;
        height: 50px;
    }
}

/* Honeypot anti-bot field (keep hidden) */
.honeypot-field {
    position: absolute !important;
    left: -9999px !important;
    opacity: 0 !important;
    height: 0 !important;
    width: 0 !important;
    overflow: hidden !important;
    pointer-events: none !important;
}

/* Print Styles */
@media print {
    .navbar,
    .hero-parallax,
    .services-parallax,
    .contact-parallax,
    .scroll-indicator {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .section {
        page-break-inside: avoid;
    }
}