/* ===================================
   BETON DESIGN - Main Stylesheet
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #2d2d2d;
    --color-secondary: #4a4a4a;
    --color-accent: #c9a227;
    --color-accent-hover: #b8921f;
    --color-background: #ffffff;
    --color-background-alt: #f5f5f5;
    --color-background-dark: #1a1a1a;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-border: #e0e0e0;
    --color-concrete: #8b8b8b;
    --color-concrete-light: #c4c4c4;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --border-radius: 4px;
    --border-radius-lg: 8px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-sm);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

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

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

.btn-nav {
    padding: 0.625rem 1.25rem;
    background-color: var(--color-accent);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
}

.btn-full {
    width: 100%;
}

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: 0.5px;
}

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

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.nav-menu a:hover {
    color: var(--color-accent);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    left: 0;
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #3a3a3a 0%, #1a1a1a 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(201, 162, 39, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(201, 162, 39, 0.05) 0%, transparent 40%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" x="0" y="0" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="rgba(255,255,255,0.03)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-3xl) 0;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--color-background);
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    color: var(--color-concrete-light);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

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

/* ===================================
   SECTIONS
   =================================== */
.section {
    padding: var(--spacing-3xl) 0;
}

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

.section-dark {
    background-color: var(--color-background-dark);
    color: var(--color-background);
}

.section-dark .section-title {
    color: var(--color-background);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
}

/* ===================================
   SERVICES SECTION
   =================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.service-card {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--color-background);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ===================================
   BENEFITS SECTION
   =================================== */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.benefit-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-fast);
}

.benefit-item:hover {
    transform: translateX(4px);
}

.benefit-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    border-radius: 50%;
    color: var(--color-primary);
}

.benefit-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.benefit-content p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ===================================
   RESULTS SECTION
   =================================== */
.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.result-card {
    background-color: var(--color-background);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.result-image {
    position: relative;
    height: 180px;
}

.result-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--color-concrete-light);
    color: var(--color-text);
}

.before .result-placeholder {
    background: linear-gradient(135deg, #9a9a9a 0%, #7a7a7a 100%);
}

.after .result-placeholder {
    background: linear-gradient(135deg, #4a4a4a 0%, #2a2a2a 100%);
    color: var(--color-background);
}

.result-placeholder span {
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
}

.result-placeholder p {
    font-size: var(--font-size-sm);
    margin-bottom: 0;
    opacity: 0.8;
}

.result-info {
    padding: var(--spacing-md);
}

.result-info h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.result-info p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ===================================
   PROCESS SECTION
   =================================== */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.process-step {
    text-align: center;
    position: relative;
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 30px;
    right: -20%;
    width: 40%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), transparent);
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    color: var(--color-primary);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    border-radius: 50%;
}

.step-content h3 {
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

.process-highlight {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-background);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-accent);
}

.highlight-icon {
    color: var(--color-accent);
}

.highlight-content h3 {
    margin-bottom: var(--spacing-xs);
}

.highlight-content p {
    color: var(--color-text-light);
    margin-bottom: 0;
}

/* ===================================
   CAPACITY SECTION
   =================================== */
.capacity-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.capacity-number {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--border-radius-lg);
    color: var(--color-background);
}

.capacity-number .number {
    display: block;
    font-size: 5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-accent);
}

.capacity-number .unit {
    display: block;
    font-size: var(--font-size-lg);
    margin-top: var(--spacing-xs);
    opacity: 0.9;
}

.capacity-text h2 {
    margin-bottom: var(--spacing-md);
}

.capacity-text > p {
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.capacity-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.capacity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-background-alt);
    border-radius: var(--border-radius);
}

.capacity-item svg {
    color: var(--color-accent);
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-text .section-title {
    text-align: left;
}

.about-intro {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.about-text p {
    color: var(--color-text-light);
}

.about-values {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.value {
    text-align: center;
}

.value strong {
    display: block;
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.value span {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.about-image {
    position: relative;
}

.about-placeholder {
    aspect-ratio: 4/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-concrete-light) 0%, var(--color-concrete) 100%);
    border-radius: var(--border-radius-lg);
    color: var(--color-text);
}

.about-placeholder svg {
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.about-placeholder span {
    font-size: var(--font-size-sm);
    opacity: 0.7;
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
}

.contact-info .section-title {
    text-align: left;
    color: var(--color-background);
}

.contact-info > p {
    color: var(--color-concrete-light);
    margin-bottom: var(--spacing-xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-background);
}

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

/* Contact Form */
.contact-form {
    background-color: var(--color-background);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-background);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-background);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
    color: var(--color-concrete-light);
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.footer h4 {
    color: var(--color-background);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.footer ul li {
    margin-bottom: var(--spacing-xs);
}

.footer ul a {
    color: var(--color-concrete-light);
    font-size: var(--font-size-sm);
}

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

.footer-services ul li {
    color: var(--color-concrete-light);
    font-size: var(--font-size-sm);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .process-step:not(:last-child)::after {
        display: none;
    }

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

    .capacity-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .capacity-number {
        max-width: 300px;
        margin: 0 auto;
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-background);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hero-cta {
        flex-direction: column;
        padding: 0 var(--spacing-md);
    }

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

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

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

    .process-steps {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-text .section-title {
        text-align: center;
    }

    .about-values {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        grid-column: auto;
    }
}

@media (max-width: 480px) {
    .section {
        padding: var(--spacing-2xl) 0;
    }

    .capacity-number .number {
        font-size: 4rem;
    }

    .capacity-list {
        grid-template-columns: 1fr;
    }
}