/**
 * Space2000.com.ph - Main Stylesheet
 * Italian Minimalist Theme
 * Colors: White, Gray, Gold
 */

/* =====================================================
   CSS VARIABLES
   ===================================================== */
:root {
    /* Primary Colors */
    --color-white: #FFFFFF;
    --color-light-gray: #F5F5F5;
    --color-gold: #C9A962;
    --color-gold-dark: #B8943F;
    --color-gold-light: #D4BC7D;
    
    /* Text Colors */
    --color-text-primary: #2C2C2C;
    --color-text-secondary: #666666;
    --color-text-light: #999999;
    
    /* Border & UI Colors */
    --color-border: #E0E0E0;
    --color-border-light: #F0F0F0;
    
    /* Status Colors */
    --color-success: #4A7C59;
    --color-error: #C75B39;
    --color-warning: #D4A84B;
    --color-info: #5B8AC7;
    
    /* Fonts */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Lato', 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* Container */
    --container-max: 1200px;
    --container-narrow: 800px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

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

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

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

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

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

ul, ol {
    list-style: none;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

.text-gold { color: var(--color-gold); }
.text-light { color: var(--color-text-light); }
.text-center { text-align: center; }
.text-uppercase { text-transform: uppercase; letter-spacing: 2px; }

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

.container-narrow {
    max-width: var(--container-narrow);
}

.section {
    padding: var(--spacing-xxl) 0;
}

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

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

.section-header h2 {
    position: relative;
    display: inline-block;
    padding-bottom: var(--spacing-sm);
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-gold);
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin: var(--spacing-md) auto 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    background-color: var(--color-gold-dark);
    border-color: var(--color-gold-dark);
    color: var(--color-white);
}

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

.btn-outline:hover {
    background-color: var(--color-gold);
    color: var(--color-white);
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

/* =====================================================
   HEADER & NAVIGATION
   ===================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
}

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

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

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

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

.nav-menu a {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-primary);
    padding: 0.5rem 0;
    position: relative;
}

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

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

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-gold);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-text-primary);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.6;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.6));
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    max-width: 800px;
    padding: 0 var(--spacing-md);
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

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

/* =====================================================
   CATEGORY CARDS
   ===================================================== */
.category-card {
    position: relative;
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-light-gray);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.category-card:hover .category-card-icon {
    background-color: var(--color-gold);
}

.category-card-icon svg,
.category-card-icon img {
    width: 40px;
    height: 40px;
    fill: var(--color-gold);
    transition: all var(--transition-normal);
}

.category-card:hover .category-card-icon svg,
.category-card:hover .category-card-icon img {
    fill: var(--color-white);
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.category-card p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* =====================================================
   PROJECT CARDS
   ===================================================== */
.project-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-card-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.project-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.project-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-md);
}

.project-card:hover .project-card-overlay {
    opacity: 1;
}

.project-card-overlay .btn {
    width: 100%;
}

.project-card-content {
    padding: var(--spacing-md);
    background-color: var(--color-white);
}

.project-card-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xs);
}

.project-card-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.project-card-content p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* =====================================================
   FEATURES / WHY CHOOSE US
   ===================================================== */
.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-gold);
    border-radius: 50%;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--color-gold);
}

.feature-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.feature-item p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

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

.about-image {
    position: relative;
}

.about-image img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
    z-index: -1;
}

.about-content h2 {
    margin-bottom: var(--spacing-md);
}

.about-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.contact-info h3 {
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.contact-item-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-light-gray);
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-item-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--color-gold);
}

.contact-item-content h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.contact-item-content p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* =====================================================
   FORMS
   ===================================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text-primary);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.1);
}

.form-control::placeholder {
    color: var(--color-text-light);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

select.form-control {
    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='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-error {
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

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

.alert-success {
    background-color: rgba(74, 124, 89, 0.1);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.alert-error {
    background-color: rgba(199, 91, 57, 0.1);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

.alert-warning {
    background-color: rgba(212, 168, 75, 0.1);
    border: 1px solid var(--color-warning);
    color: var(--color-warning);
}

.alert-info {
    background-color: rgba(91, 138, 199, 0.1);
    border: 1px solid var(--color-info);
    color: var(--color-info);
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
}

.footer h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--color-gold);
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    padding: 0.25rem 0;
    transition: color var(--transition-fast);
}

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

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    margin-bottom: 0;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

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

.social-links svg {
    width: 18px;
    height: 18px;
    fill: var(--color-white);
}

/* =====================================================
   PAGE HEADER (Inner Pages)
   ===================================================== */
.page-header {
    background-color: var(--color-text-primary);
    padding: 120px 0 60px;
    text-align: center;
}

.page-header h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
    color: var(--color-gold);
}

.breadcrumb span {
    color: var(--color-gold);
}

/* =====================================================
   PROJECT DETAIL
   ===================================================== */
.project-gallery {
    margin-bottom: var(--spacing-xl);
}

.gallery-main {
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.gallery-main img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.gallery-thumbs {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-sm);
}

.gallery-thumb {
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.gallery-thumb:hover,
.gallery-thumb.active {
    opacity: 1;
}

.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-info h1 {
    margin-bottom: var(--spacing-sm);
}

.project-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.project-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.project-meta-item svg {
    width: 18px;
    height: 18px;
    fill: var(--color-gold);
}

.project-description {
    margin-bottom: var(--spacing-lg);
}

.project-description h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.project-materials {
    background-color: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.project-materials h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

/* =====================================================
   FILTER TABS
   ===================================================== */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.5rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-tab:hover,
.filter-tab.active {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-white);
}

/* =====================================================
   PAGINATION
   ===================================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xl);
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.pagination a:hover {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.pagination .active {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-white);
}

/* =====================================================
   MAP
   ===================================================== */
.map-container {
    height: 400px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: var(--spacing-xl);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

/* =====================================================
   LIGHTBOX
   ===================================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    border: 2px solid var(--color-white);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lightbox-close:hover {
    background-color: var(--color-white);
}

.lightbox-close svg {
    width: 24px;
    height: 24px;
    fill: var(--color-white);
    transition: fill var(--transition-fast);
}

.lightbox-close:hover svg {
    fill: var(--color-text-primary);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lightbox-nav:hover {
    background-color: var(--color-gold);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-nav svg {
    width: 24px;
    height: 24px;
    fill: var(--color-white);
}

/* =====================================================
   UTILITIES
   ===================================================== */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

/* =====================================================
   RESPONSIVE STYLES
   ===================================================== */
@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-content h1 {
        font-size: 2.75rem;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-image::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border-light);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .project-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .gallery-thumbs {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 576px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .filter-tabs {
        flex-direction: column;
    }
    
    .filter-tab {
        width: 100%;
        text-align: center;
    }
    
    .gallery-thumbs {
        grid-template-columns: repeat(3, 1fr);
    }
}