/* ==========================================================================
   1. RESET Y VARIABLES (Diseño Corporativo)
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
}

:root {
    --bg-page: #f0f4f8;
    --bg-card: #ffffff;
    --primary-color: #1a446c; /* Azul Institucional */
    --primary-hover: #112d48;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #cbd5e1;
    --max-width-container: 1200px;
}

body {
    background-color: var(--bg-page);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
}

.container-custom {
    width: 100%;
    max-width: var(--max-width-container);
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================================================
   2. NAVBAR / LOGOS (Superior)
   ========================================================================== */
.navbar-institucional {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logos-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 40px;
    object-fit: contain;

}

.logo-divider {
    width: 1px;
    height: 30px;
    background-color: var(--border-color);
}

.nav-links {
    display: flex;
    gap: 20px;
}

    .nav-links a {
        text-decoration: none;
        color: var(--text-muted);
        font-size: 14px;
        font-weight: 500;
        transition: color 0.2s;
    }

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

/* ==========================================================================
   3. CONTENIDO PRINCIPAL / CARD DE LOGIN
   ========================================================================== */
.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}


.login-card {
    background-color: var(--bg-card);
    width: 100%;
    max-width: 460px;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card-header {
    text-align: center;
    margin-bottom: 30px;
}

    .card-header h2 {
        font-size: 20px;
        color: var(--primary-color);
        letter-spacing: 0.5px;
        margin-bottom: 8px;
    }

    .card-header p {
        font-size: 14px;
        color: var(--text-muted);
    }

/* Formulario e Inputs con Iconos */
.input-group {
    margin-bottom: 20px;
}

    .input-group label {
        display: block;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 8px;
        color: #475569;
    }

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

    .input-wrapper input {
        width: 100%;
        padding: 12px 16px 12px 45px;
        border: 1px solid var(--border-color);
        border-radius: 6px;
        font-size: 15px;
        background-color: #f8fafc;
        transition: all 0.2s ease;
    }

        .input-wrapper input:focus {
            outline: none;
            border-color: var(--primary-color);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(26, 68, 108, 0.1);
        }

/* Iconos SVG embebidos */
.input-icon {
    position: absolute;
    left: 15px;
    width: 18px;
    height: 18px;
    opacity: 0.5;
}

.icon-user {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://w3.org' fill='none' viewBox='0 0 24 24' stroke='%23333'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z'/%3E%3C/svg%3E") no-repeat center;
}

.icon-lock {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://w3.org' fill='none' viewBox='0 0 24 24' stroke='%23333'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z'/%3E%3C/svg%3E") no-repeat center;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 25px;
}

.forgot-link {
    font-size: 13px;
    color: var(--primary-color);
    text-decoration: none;
}

    .forgot-link:hover {
        text-decoration: underline;
    }

.btn-submit {
    width: 100%;
    padding: 14px;
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

    .btn-submit:hover {
        background-color: var(--primary-hover);
    }

.card-footer {
    text-align: center;
    margin-top: 25px;
    font-size: 13px;
    color: var(--text-muted);
}

    .card-footer a {
        color: var(--primary-color);
        text-decoration: none;
        font-weight: 500;
    }

/* ==========================================================================
   4. PIE DE PÁGINA INSTITUCIONAL
   ========================================================================== */
.footer-institucional {
    background-color: #e2e8f0;
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.footer-section h3 {
    font-size: 12px;
    color: var(--primary-color);
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.footer-section p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

.legal-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

    .legal-links a {
        font-size: 13px;
        color: var(--text-muted);
        text-decoration: none;
    }

        .legal-links a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }

/* ==========================================================================
   5. RESPONSIVE / MEDIA QUERIES ESPECÍFICOS
   ========================================================================== */

/* Ajuste general para tabletas/pantallas pequeñas */
@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- Optimización para Laptop Básica / Pantalla Común (1366 x 768) --- */
@media (min-width: 1366px) {
    :root {
        --max-width-container: 1280px;
    }

    .navbar-institucional {
        padding: 18px 0;
    }

    .logo-img {
        height: 45px;
    }

    .login-card {
        max-width: 480px;
        padding: 45px;
    }

    .card-header h2 {
        font-size: 22px;
    }
}

/* --- Optimización para Full HD Estándar (1920 x 1080) --- */
@media (min-width: 1920px) {
    :root {
        --max-width-container: 1600px;
    }

    .navbar-institucional {
        padding: 24px 0;
    }

    .logo-img {
        height: 52px;
    }

    .nav-links a {
        font-size: 15px;
        gap: 30px;
    }

    .main-content {
        padding: 80px 20px; /* Incrementa el aire vertical en monitores grandes */
    }

    .login-card {
        max-width: 520px;
        padding: 50px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    }

    .card-header h2 {
        font-size: 24px;
        margin-bottom: 12px;
    }

    .input-wrapper input {
        padding: 14px 16px 14px 50px;
        font-size: 16px;
    }

    .input-icon {
        left: 18px;
    }

    .btn-submit {
        padding: 16px;
        font-size: 16px;
    }

    .footer-institucional {
        padding: 45px 0;
    }

    .footer-section h3 {
        font-size: 13px;
        margin-bottom: 16px;
    }

    .footer-section p, .legal-links a {
        font-size: 14px;
    }
}

/* --- Optimización para Pantallas QHD / 2K Altas (2560 x 1440) --- */
@media (min-width: 2560px) {
    :root {
        --max-width-container: 2100px;
    }

    .navbar-institucional {
        padding: 32px 0;
    }

    .logo-img {
        height: 65px;
    }

    .nav-links a {
        font-size: 18px;
    }

    .main-content {
        padding: 120px 20px;
    }

    .login-card {
        max-width: 600px;
        padding: 60px;
        border-radius: 12px;
    }

    .card-header h2 {
        font-size: 28px;
    }

    .card-header p {
        font-size: 16px;
    }

    .input-group label {
        font-size: 15px;
        margin-bottom: 12px;
    }

    .input-wrapper input {
        padding: 18px 16px 18px 55px;
        font-size: 18px;
    }

    .input-icon {
        width: 22px;
        height: 22px;
        left: 20px;
    }

    .btn-submit {
        padding: 18px;
        font-size: 18px;
        border-radius: 8px;
    }

    .card-footer, .forgot-link {
        font-size: 15px;
    }

    .footer-institucional {
        padding: 60px 0;
    }

    .footer-section h3 {
        font-size: 16px;
    }

    .footer-section p, .legal-links a {
        font-size: 16px;
    }
}