:root {
    --color-primary: #1E3A8A;
    --color-primary-hover: #172554;
    --color-primary-light: #DBEAFE;
    --color-accent: #F59E0B;
    --color-accent-light: #FEF3C7;
    --color-text: #475569;
    --color-heading: #0F172A;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F8FAFC;
    --color-bg-dark: #0F172A;
    --color-border: #E2E8F0;
    --color-white: #FFFFFF;
    --font-main: 'Inter', sans-serif;
    --section-gap: 7rem;
    --transition-fast: 0.2s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 25px -5px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 20px 40px -10px rgb(0 0 0 / 0.15);
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -webkit-text-size-adjust: 100%;
}

ul { list-style: none; }
a { text-decoration: none; color: inherit; }
h1, h2, h3 { color: var(--color-heading); line-height: 1.2; font-weight: 700; }

img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Section Header */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3.5rem;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.section-label-light { color: var(--color-accent); }
.section-header h2 { font-size: 2.25rem; letter-spacing: -0.02em; }
.section-header-light h2 { color: var(--color-white); }
.text-accent { color: var(--color-primary); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    font-family: var(--font-main);
}

.btn-icon { width: 1.125rem; height: 1.125rem; }

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-large { padding: 0.875rem 1.75rem; font-size: 1rem; }

.btn-xl {
    padding: 1.125rem 2rem;
    font-size: 1.05rem;
    width: 100%;
    border-radius: var(--radius-lg);
}

.badge {
    display: inline-block;
    padding: 0.3rem 0.875rem;
    background-color: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo { display: flex; flex-direction: column; }

.logo-text {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-text);
    font-weight: 600;
}

.logo-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.nav-list { display: flex; gap: 1.75rem; }

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

.btn-nav { font-size: 0.85rem; padding: 0.5rem 1rem; }

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-heading);
    padding: 0.5rem;
    -webkit-tap-highlight-color: transparent;
}

/* ===== HERO ===== */
.hero {
    padding-top: 140px;
    padding-bottom: var(--section-gap);
    background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content { max-width: 520px; }

.hero-title {
    font-size: 3.25rem;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.hero-stat { text-align: center; flex: 1; }

.hero-stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.7rem;
    color: var(--color-text);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-stat-divider {
    width: 1px;
    height: 32px;
    background: var(--color-border);
    flex-shrink: 0;
}

.hero-cta-group { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Hero 2x2 Grid */
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
}

.hero-grid-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 210px;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base);
}

.hero-grid-item:hover { transform: scale(1.02); }

/* ===== WHY US ===== */
.why-us {
    padding: 3.5rem 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.why-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: var(--radius-lg);
}

.why-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.why-icon i { width: 20px; height: 20px; }

.why-text h3 { font-size: 1rem; margin-bottom: 0.2rem; }
.why-text p { font-size: 0.85rem; line-height: 1.5; }

/* ===== SERVICES ===== */
.services {
    padding: var(--section-gap) 0;
    background: var(--color-bg-alt);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.service-card {
    background-color: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.service-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

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

.service-number {
    font-weight: 800;
    color: var(--color-primary);
    opacity: 0.15;
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    font-size: 2.25rem;
    line-height: 1;
}

.service-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.service-card h3 { margin-bottom: 0.35rem; font-size: 1.05rem; }
.service-card p { font-size: 0.9rem; line-height: 1.55; }

/* ===== BEFORE / AFTER ===== */
.before-after {
    padding: var(--section-gap) 0;
    background: var(--color-white);
}

.ba-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.ba-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.ba-image {
    position: relative;
    height: 240px;
    overflow: hidden;
}

.ba-image img {
    transition: transform var(--transition-base);
}

.ba-pair:hover .ba-image img {
    transform: scale(1.03);
}

.ba-label {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ba-label-before {
    background: rgba(0,0,0,0.6);
    color: var(--color-white);
}

.ba-label-after {
    background: var(--color-accent);
    color: var(--color-heading);
}

/* ===== CERTIFICATE ===== */
.certificate-section {
    padding: 3rem 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.certificate-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

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

.certificate-award-icon {
    width: 36px;
    height: 36px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.certificate-info h3 { font-size: 1.05rem; margin-bottom: 0.1rem; }
.certificate-info p { font-size: 0.85rem; }

.certificate-thumb {
    position: relative;
    width: 100px;
    height: 70px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.certificate-thumb:hover { transform: scale(1.05); }

.certificate-zoom {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    opacity: 0;
    transition: opacity var(--transition-base);
    gap: 0.1rem;
}

.certificate-zoom i { width: 18px; height: 18px; }
.certificate-thumb:hover .certificate-zoom { opacity: 1; }

/* ===== REFERENCES ===== */
.references {
    padding: var(--section-gap) 0;
    background: var(--color-bg-dark);
}

.filter-group {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.filter-btn {
    padding: 0.45rem 1rem;
    background-color: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    transition: all var(--transition-fast);
    font-family: var(--font-main);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--color-accent);
    color: var(--color-heading);
    border-color: var(--color-accent);
    font-weight: 600;
}

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

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    height: 250px;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.gallery-item:hover { transform: scale(1.02); }
.gallery-item.hidden { display: none; }

/* Skeleton loading animation */
.skeleton {
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.references .skeleton {
    background: linear-gradient(90deg, #1e293b 25%, #334155 50%, #1e293b 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.before-after .skeleton {
    background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Clickable image cursor */
.clickable-img { cursor: pointer; }

/* ===== CONTACT ===== */
.contact {
    padding: var(--section-gap) 0;
    background: var(--color-bg-alt);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3.5rem;
    align-items: start;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.125rem 1.25rem;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.contact-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.contact-card-primary {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.contact-card-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.contact-card-primary .contact-card-label,
.contact-card-primary .contact-card-value { color: var(--color-white); }

.contact-card-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: rgba(30,58,138,0.1);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-card-primary .contact-card-icon {
    background: rgba(255,255,255,0.2);
    color: var(--color-white);
}

.contact-card-icon i { width: 18px; height: 18px; }
.contact-card-info { flex: 1; min-width: 0; }

.contact-card-label {
    display: block;
    font-size: 0.7rem;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    margin-bottom: 0.05rem;
}

.contact-card-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-heading);
    word-break: break-word;
}

.contact-card-arrow {
    width: 16px;
    height: 16px;
    opacity: 0.3;
    flex-shrink: 0;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.contact-card:hover .contact-card-arrow {
    transform: translateX(3px);
    opacity: 0.7;
}

.contact-cta {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.contact-cta h3 { font-size: 1.3rem; margin-bottom: 0.75rem; }
.contact-cta p { margin-bottom: 2rem; font-size: 0.95rem; }

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-bg-dark);
    color: #94A3B8;
    padding: 3rem 0 1.5rem;
}

.footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo .logo-text { color: #94A3B8; }
.footer-logo .logo-name { color: var(--color-white); }

.footer-links { display: flex; gap: 1.75rem; }
.footer-links a { font-size: 0.85rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--color-white); }

.footer-bottom { padding-top: 1.25rem; text-align: center; font-size: 0.8rem; }

.footer-sep { margin: 0 0.25rem; opacity: 0.3; }
.admin-link {
    color: #64748b;
    opacity: 0.4;
    font-size: 0.7rem;
    transition: opacity 0.2s;
}
.admin-link:hover { opacity: 0.8; }

/* ===== LIGHTBOX ===== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 1rem;
}

.lightbox.active { opacity: 1; pointer-events: all; }

.lightbox-img {
    max-width: 92vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
    width: auto;
    height: auto;
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
    z-index: 10;
    -webkit-tap-highlight-color: transparent;
}

.lightbox-close:hover { background: rgba(255,255,255,0.25); }
.lightbox-close i { width: 22px; height: 22px; }

/* ===== RESPONSIVE - TABLET ===== */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.5rem; }
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-content { max-width: 100%; margin: 0 auto; }
    .hero-stats { justify-content: center; }
    .hero-cta-group { justify-content: center; }
    .hero-grid { max-width: 480px; margin: 0 auto; }
    .why-us-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-wrapper { grid-template-columns: 1fr; }
    .ba-grid { grid-template-columns: 1fr; max-width: 600px; margin: 0 auto; }
    .certificate-container { flex-direction: column; text-align: center; }
    .certificate-info { flex-direction: column; text-align: center; }
}

/* ===== RESPONSIVE - MOBILE ===== */
@media (max-width: 768px) {
    :root { --section-gap: 4.5rem; }
    html { scroll-padding-top: 64px; }

    .header-container { height: 56px; }

    .nav {
        position: fixed;
        top: 56px;
        left: 0;
        width: 100%;
        height: calc(100dvh - 56px);
        background-color: var(--color-white);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
        z-index: 999;
    }

    .nav.active { transform: translateX(0); }

    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .nav-link { font-size: 1.25rem; }
    .mobile-toggle { display: block; }
    .btn-nav { display: none; }

    .hero {
        padding-top: 96px;
        padding-bottom: 3.5rem;
    }

    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 0.95rem; }

    .hero-grid-item { height: 140px; }
    .hero-grid { gap: 0.5rem; max-width: 100%; }

    .hero-stats {
        flex-direction: row;
        gap: 0.5rem;
        padding: 0.875rem;
    }

    .hero-stat-number { font-size: 1.25rem; }
    .hero-stat-label { font-size: 0.6rem; }
    .hero-stat-divider { width: 1px; height: 28px; }

    .hero-cta-group {
        flex-direction: column;
    }

    .hero-cta-group .btn {
        width: 100%;
        justify-content: center;
    }

    .section-header { margin-bottom: 2.5rem; }
    .section-header h2 { font-size: 1.75rem; }

    .why-us { padding: 2.5rem 0; }
    .why-us-grid { max-width: 100%; }

    .why-card { padding: 1rem; gap: 0.75rem; }
    .why-icon { width: 40px; height: 40px; min-width: 40px; }
    .why-icon i { width: 18px; height: 18px; }
    .why-text h3 { font-size: 0.95rem; }
    .why-text p { font-size: 0.8rem; }

    .services-grid { grid-template-columns: 1fr; gap: 1rem; }
    .service-card { padding: 1.5rem; }
    .service-number { font-size: 1.75rem; top: 0.875rem; right: 1rem; }

    .ba-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .ba-image { height: 180px; }

    .certificate-section { padding: 1.75rem 0; }
    .certificate-container { gap: 1rem; }
    .certificate-info { gap: 0.75rem; }
    .certificate-award-icon { width: 28px; height: 28px; }
    .certificate-info h3 { font-size: 0.95rem; }
    .certificate-info p { font-size: 0.8rem; }
    .certificate-thumb { width: 80px; height: 56px; }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    .gallery-item { height: 160px; }

    .filter-group { gap: 0.375rem; margin-bottom: 1.75rem; }
    .filter-btn { padding: 0.375rem 0.75rem; font-size: 0.78rem; }

    .contact-wrapper { gap: 1.5rem; }
    .contact-card { padding: 1rem; gap: 0.75rem; }
    .contact-card-icon { width: 36px; height: 36px; min-width: 36px; }
    .contact-card-icon i { width: 16px; height: 16px; }
    .contact-card-value { font-size: 0.9rem; }
    .contact-cta { padding: 1.5rem; }
    .contact-cta h3 { font-size: 1.1rem; }

    .footer-top {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer-links { flex-wrap: wrap; justify-content: center; gap: 1rem; }
}

/* ===== RESPONSIVE - SMALL PHONE ===== */
@media (max-width: 400px) {
    .container { padding: 0 1rem; }
    .hero-title { font-size: 1.65rem; }
    .hero-grid-item { height: 110px; }
    .hero-grid { gap: 0.375rem; }
    .ba-image { height: 140px; }
    .ba-label { font-size: 0.65rem; padding: 0.2rem 0.5rem; top: 0.5rem; left: 0.5rem; }
    .gallery-grid { grid-template-columns: 1fr; }
    .gallery-item { height: 200px; }
    .hero-stats { flex-direction: column; gap: 0.375rem; padding: 0.75rem; }
    .hero-stat-divider { width: 40px; height: 1px; }
    .section-header h2 { font-size: 1.5rem; }
    .btn-large { padding: 0.75rem 1.25rem; font-size: 0.9rem; }
    .btn-xl { padding: 1rem 1.5rem; font-size: 0.95rem; }
}