/* KJOO Website Styles - Minimalistic High Contrast Design */

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

:root {
    --bg-color: #F5F5F5;
    --text-color: #2D2D3D;
    --accent-color: #4A4A6A;
    --border-color: #D0D0D0;
    --hover-color: #5A5A7A;
    --card-bg: #FAFAFA;
    --spacing-unit: 1.5rem;
    --max-width: 1200px;
    --border-radius: 12px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-unit);
    color: var(--text-color);
}

h1 {
    font-size: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    max-width: 65ch;
}

a {
    color: #3A4A6A;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #4A5A7A;
}

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

/* Header and Navigation */
header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-unit) 0;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu li a {
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease;
}

.nav-menu li a:hover {
    border-bottom-color: var(--accent-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 0.5rem;
}

/* Hero Section */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(to bottom, var(--card-bg), var(--bg-color));
}

.hero h1 {
    margin-bottom: 1.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.25rem;
    margin: 0 auto 2rem;
    color: var(--text-color);
}

/* Sections */
section {
    padding: 4rem 0;
}

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

/* Grid Layouts */
.grid {
    display: grid;
    gap: 2rem;
    margin-top: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.card h3 {
    margin-bottom: 1rem;
}

.card p {
    margin-bottom: 0;
}

/* Products Grid */
.product-card {
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    border-radius: var(--border-radius);
}

.product-card h3 {
    margin-bottom: 1rem;
}

.product-card p {
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--accent-color);
    color: var(--card-bg);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    border: 1px solid var(--accent-color);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--hover-color);
    border-color: var(--hover-color);
    color: var(--card-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-secondary:hover {
    background-color: var(--accent-color);
    color: #FFFFFF;
}

/* Forms */
form {
    max-width: 600px;
    margin: 0 auto;
}

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

form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

form input,
form textarea,
form select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    border-radius: var(--border-radius);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

form input:focus,
form textarea:focus,
form select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(90, 90, 90, 0.1);
}

form textarea {
    resize: vertical;
    min-height: 150px;
}

form button[type="submit"] {
    width: 100%;
}

/* Footer */
footer {
    background-color: #2D2D3D;
    color: var(--card-bg);
    padding: 3rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--card-bg);
    text-decoration: underline;
}

footer a:hover {
    opacity: 0.8;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--card-bg);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.875rem;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-unit: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--card-bg);
        flex-direction: column;
        padding: var(--spacing-unit);
        border-bottom: 1px solid var(--border-color);
        border-radius: 0 0 var(--border-radius) var(--border-radius);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        gap: 0;
    }

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

    .nav-menu li {
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu li:last-child {
        border-bottom: none;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    section {
        padding: 3rem 0;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    .hero {
        padding: 3rem 0 2rem;
    }

    .container {
        padding: 0 1rem;
    }
}