/* =============================================================================
   Smart Digital & Technology Pvt. Ltd. — Public Corporate Stylesheet
   Built on Bootstrap 5.3 — Clean, high-contrast, professional corporate design
   ============================================================================= */

:root {
    --sdt-navy: #0f2537;
    --sdt-navy-dark: #091824;
    --sdt-primary: #1b4d7a;
    --sdt-primary-hover: #143b5e;
    --sdt-accent: #0d9488;
    --sdt-border: #dce3ea;
    --sdt-bg-subtle: #f5f7fa;
    --sdt-text-main: #1e293b;
    --sdt-text-muted: #475569;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--sdt-text-main);
    background-color: #ffffff;
    line-height: 1.6;
}

/* Top Utility Bar */
.sdt-topbar {
    background-color: var(--sdt-navy-dark);
    color: #cbd5e1;
    font-size: 0.85rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sdt-topbar a {
    color: #e2e8f0;
    text-decoration: none;
}

.sdt-topbar a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* Main Navbar */
.sdt-navbar {
    background-color: #ffffff;
    border-bottom: 1px solid var(--sdt-border);
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}

.sdt-brand-title {
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--sdt-navy);
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.sdt-brand-subtitle {
    font-size: 0.75rem;
    color: var(--sdt-text-muted);
    display: block;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 220px;
}

.sdt-navbar .nav-link {
    color: var(--sdt-text-main);
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.45rem 0.7rem;
    white-space: nowrap;
}

.sdt-navbar .nav-link:hover,
.sdt-navbar .nav-link.active {
    color: var(--sdt-primary);
}

@media (min-width: 992px) {
    .sdt-navbar .nav-link {
        padding: 0.45rem 0.65rem;
    }
}

/* Hero / Slider Section */
.sdt-hero {
    background-color: var(--sdt-navy);
    color: #ffffff;
    border-bottom: 3px solid var(--sdt-accent);
}

.sdt-hero-slide {
    min-height: 390px;
    padding: 4rem 0;
    display: flex;
    align-items: center;
}

.sdt-hero-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.12);
    color: #f8fafc;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.sdt-hero h1,
.sdt-hero .h1 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

/* Page Header Banner */
.sdt-page-header {
    background-color: var(--sdt-navy);
    color: #ffffff;
    padding: 2.5rem 0;
    border-bottom: 3px solid var(--sdt-accent);
}

/* Cards & Sections */
.sdt-section {
    padding: 4rem 0;
}

.sdt-section-subtle {
    background-color: var(--sdt-bg-subtle);
    padding: 4rem 0;
    border-top: 1px solid var(--sdt-border);
    border-bottom: 1px solid var(--sdt-border);
}

.sdt-card {
    background: #ffffff;
    border: 1px solid var(--sdt-border);
    border-radius: 6px;
    height: 100%;
    transition: border-color 0.15s ease-in-out;
}

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

.sdt-icon-box {
    width: 46px;
    height: 46px;
    border-radius: 6px;
    background-color: #eef4f8;
    color: var(--sdt-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

/* Buttons */
.btn-sdt-primary {
    background-color: var(--sdt-primary);
    border-color: var(--sdt-primary);
    color: #ffffff;
    font-weight: 500;
}

.btn-sdt-primary:hover,
.btn-sdt-primary:focus {
    background-color: var(--sdt-primary-hover);
    border-color: var(--sdt-primary-hover);
    color: #ffffff;
}

/* Footer */
.sdt-footer {
    background-color: var(--sdt-navy-dark);
    color: #cbd5e1;
    padding-top: 3.5rem;
    padding-bottom: 2rem;
    font-size: 0.9rem;
}

.sdt-footer h5,
.sdt-footer .h6 {
    color: #ffffff;
    font-weight: 600;
    margin-bottom: 1rem;
}

.sdt-footer a {
    color: #cbd5e1;
    text-decoration: none;
}

.sdt-footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.sdt-whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1030;
    background-color: #15803d;
    color: #ffffff;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.sdt-whatsapp-float:hover {
    background-color: #166534;
    color: #ffffff;
}

/* Gallery Lightbox */
.gallery-modal-img {
    object-fit: contain;
    max-height: 80vh;
    width: 100%;
}
.gallery-thumbnail {
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.2s ease-in-out;
}
.gallery-thumbnail:hover {
    transform: scale(1.03);
}