:root {
    --primary-color: #1e40af;
    --primary-hover: #1e3a8a;
    --secondary-color: #64748b;
    --success-color: #059669;
    --background: #fafbfc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --disabled: #cbd5e1;
    --shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--surface);
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo svg {
    width: 32px;
    height: 32px;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.015em;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn-signout {
    padding: 0.5rem 1rem;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.btn-signout:hover {
    background: var(--background);
    border-color: var(--secondary-color);
    color: var(--text-primary);
}

/* Content */
.content {
    flex: 1;
    padding: 3rem 2rem;
}

/* Login Card */
.login-card {
    background: var(--surface);
    padding: 3rem 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    text-align: center;
    max-width: 440px;
    margin: 4rem auto;
}

.login-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1.5rem;
    background: var(--background);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.login-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Intro Card */
.intro-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2.5rem;
}

.intro-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.intro-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.service-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    color: inherit;
}

.service-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.service-card-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.service-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    background: var(--background);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.service-info {
    flex: 1;
}

.service-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.service-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.service-arrow {
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: all 0.2s ease;
}

.service-card:hover .service-arrow {
    color: var(--primary-color);
    transform: translateX(2px);
}

/* Buttons */
.btn-primary {
    padding: 0.75rem 1.75rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Footer */
.footer {
    background: var(--surface);
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .content {
        padding: 2rem 1rem;
    }

    .header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .logo h1 {
        font-size: 1.125rem;
    }

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

    .login-card {
        margin: 2rem auto;
        padding: 2.5rem 2rem;
    }
}