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

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #EFF3F8 0%, #D9E2EC 100%);
    min-height: 100vh;
    position: relative;
}

/* Patrón de fondo: líneas diagonales MÁS OSCURAS (para que se noten sobre fondo claro) */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: repeating-linear-gradient(45deg, rgba(0,0,0,0.08) 0px, rgba(0,0,0,0.08) 2px, transparent 2px, transparent 12px);
    pointer-events: none;
}

/* Navbar clara con sombra sutil */
.navbar {
    background: rgba(255,255,255,0.85) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.navbar-brand {
    color: #1A2A4A !important;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.navbar-brand img {
    filter: none;
    max-height: 45px;
    width: auto;
    object-fit: contain;
}

/* Tarjeta clara con glassmorphism */
.card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.9);
    border-radius: 28px !important;
    box-shadow: 0 25px 40px -15px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    color: #1E2A3E;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 30px 45px -12px rgba(0, 0, 0, 0.15);
}

/* Logo */
.card .text-center img {
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.05));
    max-width: 150px;
}

/* Título con degradado azul corporativo */
.card h2 {
    font-weight: 700;
    font-size: 1.9rem;
    background: linear-gradient(135deg, #1A2A4A 0%, #2C5F8A 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
    margin-bottom: 1.8rem;
}

/* Etiquetas */
.form-label {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: #4A627A;
    margin-bottom: 0.4rem;
}

/* Campos de entrada */
.form-control {
    background-color: rgba(255,255,255,0.9);
    border: 1px solid #CBD5E1;
    border-radius: 14px;
    padding: 12px 16px;
    color: #1E2A3E;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.form-control:focus {
    background-color: #FFFFFF;
    border-color: #2C5F8A;
    box-shadow: 0 0 0 3px rgba(44, 95, 138, 0.2);
    color: #0A2647;
    outline: none;
}

.form-control::placeholder {
    color: #94A3B8;
    font-size: 0.85rem;
}

/* Botón principal (azul corporativo) */
.btn-primary {
    background: linear-gradient(95deg, #2C5F8A 0%, #1B4A6B 100%);
    border: none;
    border-radius: 40px;
    padding: 12px 20px;
    font-weight: 700;
    letter-spacing: 0.8px;
    font-size: 1rem;
    text-transform: uppercase;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(27, 74, 107, 0.2);
    margin-top: 8px;
}

.btn-primary:hover {
    background: linear-gradient(95deg, #1B4A6B 0%, #0F3550 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(27, 74, 107, 0.3);
}

.btn-primary:active {
    transform: translateY(1px);
}

/* Alertas */
.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    border-left: 4px solid #D92D20;
    color: #991B1B;
    border-radius: 16px;
    font-weight: 500;
    backdrop-filter: blur(4px);
}

/* Responsive */
@media (max-width: 576px) {
    .card {
        margin: 20px;
        padding: 0.8rem !important;
    }
    .card h2 {
        font-size: 1.5rem;
    }
}