/* =========================
   DESIGN SYSTEM (WHITE)
   ========================= */

:root {
    --bg-main: #ffffff;
    --bg-soft: #f7f7f8;
    --bg-card: #ffffff;

    --text-main: #0f172a;
    --text-muted: #64748b;

    --accent: #2563eb;          /* Royal blue (subtle) */
    --accent-hover: #1d4ed8;

    --border-soft: #e5e7eb;
    --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);

    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;

    --max-width: 1240px;
    --font-main: Inter, system-ui, -apple-system, sans-serif;
}

/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
}

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

.container {
    max-width: var(--max-width);
    margin: auto;
    padding: 0 24px;
}

/* =========================
   NAVBAR
   ========================= */

.navbar {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-soft);
    z-index: 100;
}

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

.brand-logo {
    font-size: 1.4rem;
    font-weight: 700;
}

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

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

.nav-links a {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--text-main);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-cta {
    padding: 0.45rem 1rem;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: white;
    font-size: 0.9rem;
}

/* =========================
   HERO
   ========================= */

.hero {
    padding: 6rem 0 7rem;
}

.hero-content {
    max-width: 720px;
}

.hero h1 {
    font-size: 3.4rem;
    line-height: 1.1;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

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

/* =========================
   BUTTONS
   ========================= */

.btn-primary {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.9rem 1.6rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-soft);
    padding: 0.9rem 1.6rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    cursor: pointer;
}

/* =========================
   ABOUT
   ========================= */

.about {
    background: var(--bg-soft);
    padding: 5rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
}

.about h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.about p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.about-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-soft);
}

.about-card li {
    list-style: none;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

/* =========================
   FEATURES
   ========================= */

.features {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 2rem;
}

.feature {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.feature h3 {
    margin-bottom: 0.5rem;
}

.feature p {
    color: var(--text-muted);
}

/* =========================
   PRODUCTS
   ========================= */

.products {
    background: var(--bg-soft);
    padding: 5rem 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px,1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.product-image {
    height: 220px;
    background: #f1f5f9;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1rem;
}

.price {
    font-weight: 600;
    margin: 0.5rem 0 1rem;
}

.full {
    width: 100%;
}

/* =========================
   FOOTER
   ========================= */

.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border-soft);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
}

.footer a {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-muted);
}