/* ===== CSS Variables - Corporate Theme ===== */
:root {
    --navy-900: #0a1628;
    --navy-800: #0f1d33;
    --navy-700: #162744;
    --navy-600: #1e3459;
    --navy-500: #2a4570;
    --navy-400: #3d5a82;
    --navy-300: #5a7a9f;
    --navy-200: #8aa3c1;
    --navy-100: #c5d4e4;
    --navy-50: #e8eef5;

    --gold-600: #b8860b;
    --gold-500: #c9981a;
    --gold-400: #d4a83a;
    --gold-300: #e0be5c;
    --gold-200: #ebd48a;
    --gold-100: #f5e9c0;
    --gold-50: #faf5e4;

    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;

    --white: #ffffff;

    --shadow-sm: 0 1px 2px 0 rgb(10 22 40 / 0.04);
    --shadow: 0 1px 3px 0 rgb(10 22 40 / 0.08), 0 1px 2px -1px rgb(10 22 40 / 0.06);
    --shadow-md: 0 4px 6px -1px rgb(10 22 40 / 0.08), 0 2px 4px -2px rgb(10 22 40 / 0.06);
    --shadow-lg: 0 10px 15px -3px rgb(10 22 40 / 0.08), 0 4px 6px -4px rgb(10 22 40 / 0.06);
    --shadow-xl: 0 20px 25px -5px rgb(10 22 40 / 0.08), 0 8px 10px -6px rgb(10 22 40 / 0.06);

    --radius-sm: 2px;
    --radius: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--slate-700);
    line-height: 1.7;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    font-size: 15px;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

/* ===== Layout ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.section-alt {
    background: var(--slate-50);
}

.section-header {
    max-width: 640px;
    margin: 0 auto 4rem;
    text-align: center;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--gold-600);
    margin-bottom: 1rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.section-tag::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--gold-500);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: 1rem;
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--slate-500);
    line-height: 1.7;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
    transition: box-shadow 0.3s;
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--navy-900);
    letter-spacing: -0.01em;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--navy-900);
    color: var(--gold-400);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--slate-600);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color 0.2s;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link:hover {
    color: var(--navy-900);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold-500);
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--navy-900);
    transition: all 0.3s;
    border-radius: 1px;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 10rem 2rem 6rem;
    background: var(--navy-900);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: linear-gradient(135deg, var(--navy-800) 0%, var(--navy-700) 100%);
    clip-path: polygon(30% 0, 100% 0, 100% 100%, 0% 100%);
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(184, 134, 11, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184, 134, 11, 0.04) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gold-400);
    margin-bottom: 1.5rem;
}

.hero-label::before {
    content: '';
    width: 32px;
    height: 1px;
    background: var(--gold-500);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-title .highlight {
    color: var(--gold-300);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--navy-200);
    margin-bottom: 2.5rem;
    max-width: 520px;
    line-height: 1.7;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gold-400);
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--navy-300);
    margin-top: 0.5rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius);
    transition: all 0.25s;
    cursor: pointer;
    border: 1.5px solid transparent;
}

.btn-primary {
    background: var(--gold-600);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--gold-500);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(184, 134, 11, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,0.25);
}

.btn-secondary:hover {
    border-color: var(--gold-400);
    color: var(--gold-300);
    background: rgba(184, 134, 11, 0.08);
}

.btn-full {
    width: 100%;
}

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.about-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--slate-200);
    transition: all 0.3s;
    position: relative;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gold-500);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    opacity: 0;
    transition: opacity 0.3s;
}

.about-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--slate-300);
    transform: translateY(-3px);
}

.about-card:hover::before {
    opacity: 1;
}

.about-icon {
    width: 52px;
    height: 52px;
    background: var(--navy-900);
    color: var(--gold-400);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: 0.875rem;
}

.about-card p {
    color: var(--slate-500);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ===== Products ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--slate-200);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--slate-300);
}

.product-image {
    height: 280px;
    background: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 30%, rgba(184, 134, 11, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, var(--navy-800) 0%, var(--navy-900) 100%);
    z-index: 1;
}

.product-image img {
    position: relative;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
    z-index: 2;
}

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

.product-brand {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gold-600);
    margin-bottom: 0.5rem;
}

.product-info {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-info h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: 0.75rem;
}

.product-info > p {
    color: var(--slate-500);
    font-size: 0.9375rem;
    margin-bottom: 1.25rem;
    flex: 1;
    line-height: 1.7;
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.product-features li {
    font-size: 0.8125rem;
    color: var(--slate-600);
    padding-left: 1.25rem;
    position: relative;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--gold-500);
    border-radius: 50%;
}

/* ===== Why Us ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}

.feature-item {
    text-align: left;
    padding: 2.5rem;
    border-right: 1px solid var(--slate-200);
    position: relative;
}

.feature-item:last-child {
    border-right: none;
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--navy-900);
    color: var(--gold-400);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    margin-bottom: 1.25rem;
}

.feature-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gold-500);
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.feature-item h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--navy-900);
    margin-bottom: 0.875rem;
}

.feature-item p {
    font-size: 0.875rem;
    color: var(--slate-500);
    line-height: 1.75;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--slate-200);
    transition: all 0.2s;
}

.contact-card:last-child {
    border-bottom: none;
}

.contact-card:hover {
    padding-left: 1rem;
    background: var(--white);
    border-radius: var(--radius);
    border-bottom-color: transparent;
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: var(--navy-900);
    color: var(--gold-400);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--slate-400);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.375rem;
}

.contact-details p {
    font-size: 0.9375rem;
    color: var(--slate-700);
    line-height: 1.7;
}

.contact-details a {
    color: var(--navy-600);
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.contact-details a:hover {
    border-bottom-color: var(--gold-500);
}

/* ===== Contact Form ===== */
.contact-form-wrapper {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--slate-200);
    box-shadow: var(--shadow);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-group label {
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--slate-500);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--slate-200);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--slate-800);
    background: var(--white);
    transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--navy-400);
    box-shadow: 0 0 0 3px var(--navy-50);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--slate-400);
    font-size: 0.875rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== Footer ===== */
.footer {
    background: var(--navy-900);
    color: var(--navy-200);
    padding: 5rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 1.25rem;
}

.footer-brand .logo-icon {
    background: var(--gold-600);
    color: var(--white);
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 320px;
    color: var(--navy-300);
}

.footer-links h4 {
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.25rem;
}

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

.footer-links a {
    font-size: 0.875rem;
    color: var(--navy-300);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--gold-400);
}

.footer-bottom {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--navy-400);
}

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

    .feature-item {
        border-right: none;
        border-bottom: 1px solid var(--slate-200);
    }

    .feature-item:nth-child(odd) {
        border-right: 1px solid var(--slate-200);
    }

    .feature-item:nth-last-child(-n+2) {
        border-bottom: none;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--slate-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        opacity: 0;
        transition: all 0.3s;
        pointer-events: none;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .hero {
        padding: 8rem 1.5rem 4rem;
    }

    .hero::before {
        width: 100%;
        clip-path: none;
        opacity: 0.3;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 2rem;
        margin-top: 3rem;
    }

    .section {
        padding: 4rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .about-grid,
    .products-grid,
    .features-grid,
    .contact-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .feature-item:nth-child(odd) {
        border-right: none;
    }

    .feature-item {
        border-bottom: 1px solid var(--slate-200);
        text-align: center;
    }

    .feature-item:last-child {
        border-bottom: none;
    }

    .contact-grid {
        gap: 2.5rem;
    }

    .footer-content {
        gap: 2.5rem;
    }

    .product-card {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.25rem;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .about-card,
    .contact-form-wrapper {
        padding: 1.75rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
}