/* ==========================================================================
   CSS Variables & Theming
   ========================================================================== */
:root {
    /* Colors - Dark Theme (Warm Espresso & Amber Glow) */
    --bg-primary: #161412;
    --bg-secondary: #201D1A;
    --bg-tertiary: #2C2723;

    --text-primary: #FAF6F0;
    --text-secondary: #A8A29E;
    --text-tertiary: #78716C;

    --accent-primary: #F59E0B;
    --accent-primary-hover: #D97706;
    --accent-primary-rgb: 245, 158, 11;

    /* Backward compatibility mapping */
    --accent-indigo: var(--accent-primary);
    --accent-indigo-hover: var(--accent-primary-hover);
    --accent-green: #34D399;

    --gradient-heading: linear-gradient(135deg, #FFFDF8 30%, #FBBF24 100%);

    --border-color: rgba(250, 246, 240, 0.08);
    --glass-bg: rgba(32, 29, 26, 0.85);
    --glass-border: rgba(250, 246, 240, 0.06);

    /* Typography */
    --font-primary: 'Inter', sans-serif;

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

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 18px -2px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 32px -5px rgba(0, 0, 0, 0.55);
    --shadow-glow: 0 0 24px rgba(245, 158, 11, 0.2);
}

/* Light Theme Overrides (Warm Editorial Linen & Amber Ochre) */
[data-theme="light"] {
    --bg-primary: #FAF7F2;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F3EFE6;

    --text-primary: #1C1917;
    --text-secondary: #57534E;
    --text-tertiary: #78716C;

    --accent-primary: #D97706;
    --accent-primary-hover: #B45309;
    --accent-primary-rgb: 217, 119, 6;

    --accent-indigo: var(--accent-primary);
    --accent-indigo-hover: var(--accent-primary-hover);
    --accent-green: #15803D;

    --gradient-heading: linear-gradient(135deg, #1C1917 25%, #D97706 100%);

    --border-color: #E7DFD5;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(28, 25, 23, 0.06);

    --shadow-sm: 0 1px 3px rgba(44, 34, 25, 0.05);
    --shadow-md: 0 4px 14px -2px rgba(44, 34, 25, 0.08);
    --shadow-lg: 0 14px 30px -4px rgba(44, 34, 25, 0.1);
    --shadow-glow: 0 0 20px rgba(217, 119, 6, 0.2);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

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

ul {
    list-style: none;
}

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

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

/* Typography Utility */
.gradient-text {
    background: var(--gradient-heading);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--accent-primary);
    /* Fallback */
}

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

.mt-4 {
    margin-top: 1rem;
}

.w-full {
    width: 100%;
}

/* ==========================================================================
   Layout & Container
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 6rem 0;
}

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

.section-heading {
    margin-bottom: 3rem;
    max-width: 700px;
}

.section-heading.text-center {
    margin-left: auto;
    margin-right: auto;
}

.section-label {
    display: inline-block;
    color: var(--accent-indigo);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.section-heading h2 {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-heading p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--accent-indigo);
    color: #FFFFFF;
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(var(--accent-primary-rgb), 0.25);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: transparent;
    color: var(--text-primary);
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-indigo);
    font-weight: 600;
    transition: gap var(--transition-fast);
}

.btn-text:hover {
    gap: 0.75rem;
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
}

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

/* ==========================================================================
   Header & Navbar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: background-color var(--transition-normal), backdrop-filter var(--transition-normal), border-bottom var(--transition-normal);
    padding: 1.5rem 0;
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background-color: var(--accent-indigo);
    transition: width var(--transition-fast);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mobile-menu-btn {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    padding-top: 10rem;
    padding-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(var(--accent-primary-rgb), 0.08) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-content {
    max-width: 800px;
}

.pill-badge {
    display: inline-block;
    padding: 0.45rem 1rem;
    background-color: rgba(var(--accent-primary-rgb), 0.08);
    color: var(--accent-primary);
    border: 1px solid rgba(var(--accent-primary-rgb), 0.18);
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-section h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Metrics Bar */
.metrics-bar {
    margin-top: 5rem;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    padding: 2rem 0;
}

.metrics-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-green);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-content h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.highlight-card {
    display: flex;
    gap: 1rem;
}

.accent-icon {
    color: var(--accent-indigo);
    flex-shrink: 0;
}

.highlight-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.highlight-card p {
    font-size: 0.875rem;
    margin-bottom: 0;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-indigo);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-title {
    display: block;
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2.5rem 2rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

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

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

.service-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(var(--accent-primary-rgb), 0.08);
    color: var(--accent-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ==========================================================================
   Case Studies Section
   ========================================================================== */
.filter-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--accent-indigo);
    color: #FFFFFF;
    border-color: var(--accent-indigo);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.project-img-wrapper {
    width: 100%;
    height: 240px;
    overflow: hidden;
}

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

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

.project-content {
    padding: 2rem;
}

.project-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-indigo);
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 1.5rem;
}

.project-metrics {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.metric-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.metric-pill i {
    width: 14px;
    height: 14px;
}

/* ==========================================================================
   Tools Section
   ========================================================================== */
.tools-section {
    padding: 4rem 0;
}

.tools-heading {
    color: var(--text-secondary);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
}

.tools-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.tool-item {
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.tool-item:hover {
    border-color: var(--accent-indigo);
    color: var(--accent-indigo);
    transform: translateY(-2px);
}

/* ==========================================================================
   Testimonials Section
   ========================================================================== */
.testimonials-slider {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.testimonial-card {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    position: relative;
}

.quote-icon {
    position: absolute;
    top: 2rem;
    right: 2rem;
    color: var(--bg-tertiary);
    opacity: 0.5;
}

.quote-icon i {
    width: 48px;
    height: 48px;
}

.testimonial-text {
    font-size: 1.125rem;
    font-style: italic;
    margin-bottom: 2rem;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.client-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.client-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-indigo);
}

.client-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.client-info span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-info .section-heading {
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--accent-indigo);
    color: #FFFFFF;
    border-color: var(--accent-indigo);
}

.contact-form-wrapper {
    background-color: var(--bg-primary);
    padding: 3rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95) translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.close-modal {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    background-color: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
    z-index: 10;
}

.close-modal:hover {
    background-color: var(--bg-tertiary);
}

.modal-body {
    padding: 3rem;
}

/* Modal specific styles */
.modal-project-img {
    width: calc(100% + 6rem);
    margin: -3rem -3rem 2rem -3rem;
    height: 300px;
    object-fit: cover;
}

.modal-metrics {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 0.5rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* --- Tablet (≤1024px) --- */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

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

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }

    .hero-section {
        padding-top: 8rem;
    }
}

/* --- Mobile (≤768px) --- */
@media (max-width: 768px) {
    /* Base sizing */
    section {
        padding: 4rem 0;
    }

    .container {
        padding: 0 1.25rem;
    }

    /* Hero */
    .hero-section {
        padding-top: 7rem;
        padding-bottom: 3rem;
    }

    .hero-section .container {
        flex-direction: column !important;
        gap: 2rem !important;
        align-items: center !important;
        text-align: center !important;
    }

    .hero-content {
        text-align: center !important;
        min-width: unset !important;
        flex: unset !important;
        width: 100%;
    }

    .hero-section h1 {
        font-size: 2.4rem !important;
        white-space: normal !important;
        line-height: 1.15;
    }

    .hero-subtitle {
        font-size: 1rem !important;
        margin-left: auto !important;
        margin-right: auto;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
        width: 100%;
        justify-content: center !important;
    }

    .hero-ctas a,
    .hero-ctas button {
        width: 100%;
        max-width: 320px;
    }

    .hero-image {
        min-width: unset !important;
        flex: unset !important;
        width: 100%;
    }

    .hero-image img {
        max-height: 300px !important;
        width: 100%;
        object-fit: cover;
    }

    /* Metrics */
    .metrics-container {
        flex-direction: column;
        gap: 2rem;
        align-items: center;
    }

    /* Navigation */
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-secondary);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    /* About */
    .about-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    /* Projects */
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .filter-controls {
        gap: 0.5rem;
    }

    .filter-btn {
        font-size: 0.85rem;
        padding: 0.4rem 0.85rem;
    }

    /* Testimonials */
    .testimonials-slider {
        grid-template-columns: 1fr;
    }

    /* Footer grid */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    /* Section headings */
    .section-heading h2 {
        font-size: 2rem;
    }

    /* Modal */
    .modal-body {
        padding: 1.5rem;
    }

    .modal-project-img {
        width: calc(100% + 3rem);
        margin: -1.5rem -1.5rem 1.5rem -1.5rem;
    }

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

    /* Contact layout */
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    /* Contact form wrapper */
    .contact-form-wrapper {
        padding: 1.5rem;
    }
}

/* --- Small Mobile (≤480px) --- */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-section h1 {
        font-size: 2rem !important;
    }

    .btn-primary,
    .btn-secondary {
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }

    .section-heading h2 {
        font-size: 1.75rem;
    }

    .certs-title {
        font-size: 1.75rem !important;
    }

    .logo {
        font-size: 1.25rem;
    }

    /* Stat cards side by side on small screens */
    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .stat-card {
        padding: 1.25rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .service-card {
        padding: 1.75rem 1.25rem;
    }

    .testimonial-card {
        padding: 1.5rem;
    }

    .tools-grid {
        gap: 0.75rem;
    }

    .tool-item {
        padding: 0.6rem 1rem;
        font-size: 0.875rem;
    }

    .pill-badge {
        font-size: 0.8rem;
    }

    /* Contact cards */
    .contact-method-val {
        font-size: 0.9rem;
    }

    /* Footer */
    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 1.25rem;
        right: 1.25rem;
    }
}

/* ==========================================================================
   Background Utilities
   ========================================================================== */
.skills-bg {
    position: relative;
    background-image: url('https://images.unsplash.com/photo-1460925895917-afdab827c52f?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: scroll; /* 'fixed' breaks on iOS/Android — scroll is safe */
    z-index: 1;
}

.skills-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    opacity: 0.85;
    z-index: -1;
}

/* ==========================================================================
   Floating WhatsApp Button
   ========================================================================== */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
    text-decoration: none;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: wa-bounce-in 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.whatsapp-float::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.4);
    animation: wa-pulse 2.5s ease-out infinite;
}

.whatsapp-float:hover {
    transform: scale(1.12) translateY(-3px);
    box-shadow: 0 10px 32px rgba(37, 211, 102, 0.65);
}

.whatsapp-float-tooltip {
    position: absolute;
    right: calc(100% + 14px);
    background: #1e1e1e;
    color: #fff;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.4rem 0.85rem;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transform: translateX(8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.whatsapp-float-tooltip::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: #1e1e1e;
}

.whatsapp-float:hover .whatsapp-float-tooltip {
    opacity: 1;
    transform: translateX(0);
}

@keyframes wa-pulse {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }

    70% {
        transform: scale(1.7);
        opacity: 0;
    }

    100% {
        opacity: 0;
    }
}

@keyframes wa-bounce-in {
    from {
        transform: scale(0);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 0;
    margin-top: 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-tagline {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-top: 1rem;
    max-width: 320px;
}

.footer-col-title {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 1.25rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links li a,
.footer-links li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .whatsapp-btn span {
        display: none;
    }
}

/* ==========================================================================
   Certification Cards
   ========================================================================== */
.cert-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    backdrop-filter: blur(10px);
}

.cert-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.cert-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 1rem;
    margin: 2rem 2rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-body {
    padding: 1.25rem 2rem 1.5rem;
    flex: 1;
}

.cert-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    background: rgba(var(--accent-primary-rgb), 0.1);
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
}

.cert-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.cert-issuer {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.cert-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.cert-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    border-top: 1px solid var(--border-color);
    background: rgba(16, 185, 129, 0.05);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-green);
}

/* ================================
   NEW CERTIFICATIONS SECTION
================================ */

.certs-section {
    position: relative;
    min-height: auto;
    padding: 50px 20px 40px;
    background: var(--bg-primary);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.certs-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.4;
    mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
    z-index: 1;
}

.certs-inner {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.certs-heading {
    text-align: center;
    margin-bottom: 30px;
}

.certs-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    margin: 8px 0;
    color: var(--text-primary);
}

.certs-sub {
    color: var(--text-secondary);
    letter-spacing: 4px;
    text-transform: uppercase;
    font-size: 0.85rem;
}

/* 3D STAGE */
.certs-stage {
    position: relative;
    width: 100%;
    height: 380px;
    perspective: 1500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certs-track {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.cert-slide {
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(440px, 52vw);
    max-height: 310px;
    transform: translate(-50%, -50%);
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.6s ease, filter 0.6s ease;
    box-shadow: 0 10px 25px rgba(0,0,0,0.25);
    opacity: 0; /* Hidden by default when not in active 3 */
    pointer-events: none;
    will-change: transform, opacity;
}

.cert-slide img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

/* STATES */
.cert-slide.active {
    transform: translate(-50%, -50%) translateZ(80px) scale(1);
    opacity: 1;
    z-index: 10;
    pointer-events: auto;
    box-shadow: 0 20px 40px rgba(0,0,0,0.18), 0 0 30px rgba(var(--accent-primary-rgb), 0.12);
}

.cert-slide.prev {
    transform: translate(-50%, -50%) translateX(-60%) translateZ(-100px) rotateY(15deg) scale(0.85);
    opacity: 0.7;
    z-index: 5;
    pointer-events: auto;
    filter: brightness(0.6);
}

.cert-slide.next {
    transform: translate(-50%, -50%) translateX(60%) translateZ(-100px) rotateY(-15deg) scale(0.85);
    opacity: 0.7;
    z-index: 5;
    pointer-events: auto;
    filter: brightness(0.6);
}

.cert-slide.hidden {
    transform: translate(-50%, -50%) translateZ(-300px) scale(0.6);
    opacity: 0;
    z-index: 1;
    pointer-events: none;
}

/* GLOW */
.certs-floor-glow {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 70%;
    height: 60px;
    background: radial-gradient(ellipse at center, rgba(var(--accent-primary-rgb), 0.12) 0%, transparent 70%);
    filter: blur(20px);
    pointer-events: none;
}

/* ARROWS */
.certs-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    transition: 0.3s ease;
    backdrop-filter: blur(5px);
}

.certs-arrow:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
    transform: translateY(-50%) scale(1.1);
}

.certs-prev { left: 5%; }
.certs-next { right: 5%; }

/* DOTS */
.certs-dots {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.cert-dot {
    width: 9px;
    height: 9px;
    border-radius: 5px;
    background: var(--border-color);
    cursor: pointer;
    transition: 0.3s ease;
    border: none;
    padding: 0;
}

.cert-dot.active {
    width: 26px;
    background: var(--accent-primary);
    box-shadow: 0 0 10px rgba(var(--accent-primary-rgb), 0.4);
}

/* HINT */
.certs-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    color: var(--text-tertiary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.certs-pip {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent-primary);
    animation: pip-pulse 2s infinite;
}

@keyframes pip-pulse {
    0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 8px rgba(var(--accent-primary-rgb), 0.6); }
    50% { opacity: 0.4; transform: scale(0.8); box-shadow: none; }
}

/* RESPONSIVE */
@media (max-width: 900px) {
    .certs-stage { height: 320px; }
    .cert-slide { width: min(380px, 70vw); }
    .cert-slide.prev { transform: translate(-50%, -50%) translateX(-40%) translateZ(-150px) rotateY(15deg) scale(0.75); }
    .cert-slide.next { transform: translate(-50%, -50%) translateX(40%) translateZ(-150px) rotateY(-15deg) scale(0.75); }
}

@media (max-width: 600px) {
    .certs-stage { height: 260px; }
    .cert-slide { width: min(310px, 82vw); }
    .certs-arrow { display: none; } /* hide arrows on mobile, rely on swipe */
    .cert-slide.prev { transform: translate(-50%, -50%) translateX(-20%) translateZ(-200px) rotateY(20deg) scale(0.65); opacity: 0.3; }
    .cert-slide.next { transform: translate(-50%, -50%) translateX(20%) translateZ(-200px) rotateY(-20deg) scale(0.65); opacity: 0.3; }
}

/* ==========================================================================
   Professional Contact Section
   ========================================================================== */
.contact-section {
    position: relative;
    padding: 6rem 0;
    overflow: hidden;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: 3rem;
    align-items: start;
    margin-top: 3rem;
}

/* Left Column - Info & Cards */
.contact-info-col {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Status Card */
.contact-status-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.status-indicator {
    position: relative;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.status-dot {
    width: 14px;
    height: 14px;
    background: #10B981;
    border-radius: 50%;
    display: block;
}

.status-pulse {
    position: absolute;
    top: -3px;
    left: -3px;
    width: 20px;
    height: 20px;
    background: rgba(16, 185, 129, 0.4);
    border-radius: 50%;
    animation: ping-slow 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping-slow {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

.status-text h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
}

.status-text p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
}

/* Contact Cards Grid */
.contact-cards-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.contact-method-card:not(.no-hover):hover {
    transform: translateY(-3px);
    border-color: var(--accent-indigo);
    box-shadow: 0 10px 25px -5px rgba(var(--accent-primary-rgb), 0.1);
}

.contact-method-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(var(--accent-primary-rgb), 0.08);
    color: var(--accent-indigo);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.contact-method-card:not(.no-hover):hover .contact-method-icon {
    background: var(--accent-indigo);
    color: #FFFFFF;
    transform: scale(1.05);
}

.contact-method-details {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.contact-method-label {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 0.25rem;
}

.contact-method-val {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.contact-method-arrow {
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
    transition: transform var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}

.contact-method-card:hover .contact-method-arrow {
    color: var(--accent-indigo);
    transform: translate(3px, -3px);
}

/* Response Time Note */
.contact-note {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    background: rgba(var(--accent-primary-rgb), 0.05);
    border: 1px dashed rgba(var(--accent-primary-rgb), 0.25);
    border-radius: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Right Column - Contact Form */
.contact-form-wrapper {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

.form-header {
    margin-bottom: 2rem;
    text-align: left;
}

.form-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
}

.form-header p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group label .required {
    color: #EF4444;
}

.form-group label .optional {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-left: 0.25rem;
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon .input-icon {
    position: absolute;
    left: 1rem;
    width: 18px;
    height: 18px;
    color: var(--text-tertiary);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.input-with-icon.textarea-wrapper {
    align-items: flex-start;
}

.input-with-icon .textarea-icon {
    top: 1rem;
}

.input-with-icon input,
.input-with-icon select,
.input-with-icon textarea {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.625rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.input-with-icon select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 16px;
    cursor: pointer;
}

.input-with-icon select option {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.input-with-icon textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

.input-with-icon input:focus,
.input-with-icon select:focus,
.input-with-icon textarea:focus {
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.15);
}

.input-with-icon:focus-within .input-icon {
    color: var(--accent-indigo);
}

.form-submit-btn {
    margin-top: 0.5rem;
    width: 100%;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}

.form-status-message {
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    line-height: 1.5;
    text-align: left;
}

.form-status-message.success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10B981;
}

/* Contact Responsive */
@media (max-width: 968px) {
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    .contact-form-wrapper {
        padding: 1.75rem 1.25rem;
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}