:root {
    --primary: #007aff;
    --secondary: #5856d6;
    --accent: #ff2d55;
    --background: #ffffff;
    --text-main: #1d1d1f;
    --text-sub: #86868b;
    --card-bg: #f5f5f7;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --border: #d2d2d7;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-family);
    color: var(--text-main);
    background-color: var(--background);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    height: 64px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
}

nav ul li a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
}

nav ul li a:hover {
    color: var(--primary);
}

/* Hero */
.hero {
    height: 80vh;
    width: 100%;
    margin-top: 64px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
    filter: brightness(0.7);
    transition: transform 10s ease-out;
}

.hero:hover img {
    transform: scale(1.05);
}

.hero-content {
    color: white;
    padding: 0 20px;
    max-width: 900px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.04em;
}

.hero p {
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 40px;
}

/* Sections */
section {
    padding: 100px 10%;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.paragraph-intro {
    font-size: 1.2rem;
    color: var(--text-sub);
    max-width: 800px;
    margin-bottom: 60px;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.card-img {
    height: 240px;
    width: 100%;
    object-fit: cover;
}

.card-content {
    padding: 30px;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.card p {
    color: var(--text-sub);
    font-size: 1rem;
    margin-bottom: 20px;
}

.button {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary);
    color: white;
    border-radius: 30px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.button:hover {
    background: var(--secondary);
    transform: scale(1.05);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 24px;
}

.profile-info {
    list-style: none;
}

.profile-info li {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.profile-info strong {
    color: var(--primary);
    width: 120px;
    display: inline-block;
}

/* Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1.1rem; }
    .about-grid { grid-template-columns: 1fr; }
    header { padding: 0 20px; }
    nav ul { gap: 15px; }
    nav ul li a { font-size: 0.8rem; }
}