@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #0f172a; /* Navy Blue */
    --primary-light: #1e293b;
    --accent: #0284c7; /* Sky Blue */
    --accent-hover: #0369a1;
    --gold: #eab308;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-600: #475569;
    --gray-800: #1e293b;
    --success: #10b981;
    --error: #ef4444;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    color: var(--primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--accent);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-outline:hover {
    background: var(--accent);
    color: white;
}

/* Auth Cards */
.auth-wrapper {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: radial-gradient(circle at top right, #e0f2fe, transparent),
                radial-gradient(circle at bottom left, #f1f5f9, transparent);
}

.auth-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 450px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--gray-600);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}

/* Dashboard */
.dashboard-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
    border-radius: 0 0 40px 40px;
}

.dashboard-header h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.test-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.test-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.test-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.test-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.test-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.test-actions {
    display: flex;
    gap: 1rem;
    margin-top: auto;
}

.upload-section {
    background: var(--gray-50);
    padding: 1.25rem;
    border-radius: var(--radius);
    margin-top: 1.5rem;
    border: 1px solid var(--gray-200);
}

.upload-section h4 {
    font-size: 0.85rem;
    margin-bottom: 1rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.file-input-wrapper {
    position: relative;
    width: 100%;
}

.form-control-file {
    width: 100%;
    font-size: 0.85rem;
    padding: 0.5rem;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
}

/* Footer */
footer {
    background: var(--primary);
    color: rgba(255, 255, 255, 0.7);
    padding: 3rem 0;
    margin-top: 5rem;
    text-align: center;
}

footer strong {
    color: white;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade {
    animation: fadeIn 0.5s ease forwards;
}

@media (max-width: 640px) {
    .test-actions {
        flex-direction: column;
    }
    .test-grid {
        grid-template-columns: 1fr;
    }
}