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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
}

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

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

a:hover {
    text-decoration: underline;
}

/* Nav */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text);
    text-decoration: none;
}

.btn-nav {
    background: var(--primary);
    color: #fff !important;
    padding: 0.5rem 1.25rem;
    border-radius: 8px;
    transition: background 0.2s;
}

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

/* Hero */
.hero {
    padding: 10rem 2rem 6rem;
    text-align: center;
    background: linear-gradient(180deg, #f0f5ff 0%, var(--bg) 100%);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.25rem;
    color: var(--text);
}

.hero h1 span {
    color: var(--primary);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 2rem;
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--primary-dark);
    text-decoration: none;
}

/* Sections */
.section {
    padding: 5rem 2rem;
}

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

.section h2 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.card-icon {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Login */
.login-wrapper {
    max-width: 400px;
    margin: 0 auto;
}

.login-form {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-form input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-alt);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}

.login-form input:focus {
    border-color: var(--primary);
}

.login-form .btn-primary {
    width: 100%;
    text-align: center;
}

.login-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.contact-grid h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-grid p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links a:not(.btn-nav) {
        display: none;
    }

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

    .hero h1 {
        font-size: 2rem;
    }

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

    .cards {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .section {
        padding: 3rem 1.5rem;
    }
}