/* ============================================
   VARIABLES Y RESET
   ============================================ */
:root {
    --primary-color: #0a3c6e;
    --primary-dark: #062a4d;
    --primary-light: #1a5ba3;
    --accent-color: #e6af2e;
    --accent-hover: #d49a1a;
    --text-color: #333333;
    --text-light: #6b7280;
    --bg-color: #f0f2f5;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-hover: 0 15px 50px rgba(0, 0, 0, 0.25);
    --radius: 12px;
    --transition: all 0.3s ease;
    --border-color: #e5e7eb;
    --error-color: #dc3545;
    --success-color: #28a745;
    --warning-color: #ffc107;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    margin: 0;
}

/* ============================================
   CONTENEDOR PRINCIPAL
   ============================================ */
.login-container {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 440px;
    padding: 40px 35px;
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   LOGO
   ============================================ */
.logo-container {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    width: 200px;
    height: auto;
    max-height: 90px;
    object-fit: contain;
}

/* ============================================
   TÍTULOS
   ============================================ */
.login-container h2 {
    color: var(--primary-color);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-subtitle {
    color: var(--text-light);
    text-align: center;
    font-size: 0.95rem;
    margin-bottom: 25px;
    line-height: 1.5;
}

.login-subtitle .highlight {
    color: var(--accent-color);
    font-weight: 600;
}

/* ============================================
   ALERTAS Y MENSAJES
   ============================================ */
.alert {
    padding: 14px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.alert-danger {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--error-color);
}

.alert-danger .alert-icon {
    color: var(--error-color);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.alert-success {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: var(--success-color);
}

.alert-info {
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

.alert-warning {
    background-color: #fffbeb;
    border: 1px solid #fde68a;
    color: #92400e;
}

/* ============================================
   FORMULARIO
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--error-color);
    margin-left: 2px;
}

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

.form-group .input-icon {
    position: absolute;
    left: 14px;
    color: #9ca3af;
    font-size: 1.1rem;
    pointer-events: none;
}

.form-group input {
    width: 100%;
    padding: 12px 14px 12px 44px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
    color: var(--text-color);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(10, 60, 110, 0.1);
}

.form-group input.error {
    border-color: var(--error-color);
}

.form-group input.error:focus {
    box-shadow: 0 0 0 4px rgba(220, 53, 69, 0.1);
}

.form-group input[readonly] {
    background-color: #f3f4f6;
    cursor: not-allowed;
    opacity: 0.8;
}

.form-group .toggle-password {
    position: absolute;
    right: 14px;
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 0;
    font-size: 1.1rem;
    transition: var(--transition);
}

.form-group .toggle-password:hover {
    color: var(--primary-color);
}

/* ============================================
   REQUISITOS DE CONTRASEÑA
   ============================================ */
.password-requirements {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 18px;
    margin-bottom: 20px;
}

.password-requirements .req-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 8px;
}

.password-requirements ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 15px;
}

.password-requirements ul li {
    font-size: 0.8rem;
    color: var(--text-light);
    padding: 3px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.password-requirements ul li .req-icon {
    font-size: 0.9rem;
}

.password-requirements ul li.valid {
    color: var(--success-color);
}

.password-requirements ul li.invalid {
    color: var(--error-color);
}

/* ============================================
   BOTONES
   ============================================ */
.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary {
    width: 100%;
    padding: 12px;
    background: var(--white);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
}

.btn-secondary:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
}

.btn-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.btn-group .btn-primary,
.btn-group .btn-secondary {
    margin-top: 0;
}

/* ============================================
   PIE DE PÁGINA
   ============================================ */
.footer-links {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-links p {
    color: var(--text-light);
    font-size: 0.85rem;
    margin: 3px 0;
}

.footer-links .help-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 5px;
}

.footer-links .contact-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.footer-links .contact-info span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.footer-links .contact-info .icon {
    font-size: 1rem;
}

/* ============================================
   PÁGINA DE ÉXITO
   ============================================ */
.success-container {
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: #f0fdf4;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2.5rem;
    color: var(--success-color);
}

.success-message {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.warning-message {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 8px;
    padding: 15px 20px;
    margin: 15px 0;
    text-align: left;
    font-size: 0.9rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 480px) {
    .login-container {
        padding: 25px 20px;
        border-radius: 8px;
    }

    .login-container h2 {
        font-size: 1.4rem;
    }

    .login-subtitle {
        font-size: 0.85rem;
    }

    .logo {
        width: 150px;
        max-height: 70px;
    }

    .form-group input {
        padding: 10px 12px 10px 38px;
        font-size: 0.95rem;
    }

    .password-requirements ul {
        grid-template-columns: 1fr;
    }

    .btn-primary {
        padding: 12px;
        font-size: 0.95rem;
    }

    .footer-links .contact-info {
        flex-direction: column;
        gap: 5px;
    }

    .footer-links .contact-info span {
        justify-content: center;
    }
}

@media (max-width: 360px) {
    .login-container {
        padding: 20px 15px;
    }

    .login-container h2 {
        font-size: 1.2rem;
    }

    .logo {
        width: 120px;
    }
}

/* ============================================
   UTILIDADES
   ============================================ */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-light);
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none !important;
}

/* ============================================
   SPINNER DE CARGA
   ============================================ */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 0.8s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn-loading .btn-text {
    opacity: 0.7;
}

/* ============================================
   TOOLTIP
   ============================================ */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-dark);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    white-space: nowrap;
    margin-bottom: 5px;
}