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

:root {
    --bg-body: #f4f7fc;
    --bg-surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #5b6e8c;
    --border-light: #e9eef3;
    --primary: #2266dc;
    --primary-dark: #1a56c2;
    --primary-soft: #eef3ff;
    --primary-glow: rgba(34, 102, 220, 0.12);
    --shadow-sm: 0 6px 14px rgba(0, 0, 0, 0.02), 0 1px 3px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
    --radius-card: 1.5rem;
    --radius-element: 0.9rem;
    --transition: all 0.2s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

body {
    background: var(--bg-body);
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, sans-serif;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700;14..32,800&display=swap');

/* Tarjeta de login */
.login-card {
    background: var(--bg-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-md);
    padding: 2rem 2rem 2.2rem;
    width: 100%;
    max-width: 440px;
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.login-card:hover {
    box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.08);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header i {
    font-size: 2.5rem;
    color: var(--primary);
    background: var(--primary-soft);
    padding: 0.8rem;
    border-radius: 60px;
    margin-bottom: 1rem;
    display: inline-block;
}

.login-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.login-header p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

/* Grupos de formulario */
.input-group {
    margin-bottom: 1.2rem;
}

.input-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.input-group input {
    width: 100%;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    padding: 0.8rem 1rem;
    border-radius: 2rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.input-group input:hover {
    border-color: #cbd5e1;
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Botón primario */
button {
    width: 100%;
    background: var(--primary);
    border: none;
    padding: 0.8rem 1.2rem;
    border-radius: 2rem;
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 0.8rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 18px var(--primary-glow);
}

/* Pie de formulario */
.login-footer {
    text-align: center;
    margin-top: 1.8rem;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.login-footer i {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 480px) {
    .login-card {
        padding: 1.5rem;
    }

    .login-header h1 {
        font-size: 1.4rem;
    }
}