:root {
    --primary-color: #e50914;
    --primary-dark: #b20710;
    --primary-light: #ff1a24;
    --secondary-color: #564d4d;
    --background-dark: #141414;
    --background-card: #1f1f1f;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --success-color: #46d369;
    --error-color: #f44336;
    --warning-color: #ffc107;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Navbar Mejorado */
.navbar {
    background: linear-gradient(90deg, rgba(20, 20, 20, 0.95) 0%, rgba(31, 31, 31, 0.95) 100%);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    padding: 1rem 2rem !important;
    border-bottom: 1px solid rgba(229, 9, 20, 0.3);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.8rem !important;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(229, 9, 20, 0.5);
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    color: var(--text-secondary) !important;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    color: var(--text-primary) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.dropdown-menu {
    background-color: var(--background-card) !important;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
}

.dropdown-item {
    color: var(--text-secondary) !important;
    transition: var(--transition);
    padding: 0.75rem 1.25rem;
}

.dropdown-item:hover {
    background-color: rgba(229, 9, 20, 0.1) !important;
    color: var(--text-primary) !important;
}

.dropdown-item img {
    margin-right: 10px;
    transition: var(--transition);
}

.dropdown-item:hover img {
    transform: scale(1.1);
}

/* Logo Container */
.logo-container {
    text-align: center;
    padding: 3rem 0 2rem 0;
    animation: fadeInDown 0.8s ease-out;
}

.logo-container img {
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.5));
    transition: var(--transition);
}

.logo-container img:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 15px 30px rgba(229, 9, 20, 0.4));
}

/* Cards Mejoradas */
.card {
    background: linear-gradient(135deg, var(--background-card) 0%, rgba(31, 31, 31, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(229, 9, 20, 0.3);
    border-color: rgba(229, 9, 20, 0.5);
}

.card-header {
    background: linear-gradient(135deg, rgba(229, 9, 20, 0.2) 0%, rgba(229, 9, 20, 0.1) 100%);
    border-bottom: 2px solid rgba(229, 9, 20, 0.3);
    padding: 1.5rem;
    font-weight: 600;
}

.card-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.card-body {
    padding: 2rem;
}

/* Formularios Mejorados */
.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.form-control {
    background-color: rgba(255, 255, 255, 0.05) !important;
    border: 2px solid rgba(255, 255, 255, 0.1) !important;
    color: var(--text-primary) !important;
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    background-color: rgba(255, 255, 255, 0.08) !important;
    border-color: var(--primary-color) !important;
    box-shadow: 0 0 0 0.2rem rgba(229, 9, 20, 0.25) !important;
    outline: none;
}

.form-control::placeholder {
    color: rgba(179, 179, 179, 0.6);
}

/* Botones Mejorados */
.btn {
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(229, 9, 20, 0.4);
    width: 100%;
    margin-top: 1rem;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    box-shadow: 0 6px 20px rgba(229, 9, 20, 0.6);
    transform: translateY(-2px);
}

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

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #3a3333 100%);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #6a5d5d 0%, var(--secondary-color) 100%);
    transform: translateY(-2px);
}

/* Alertas Mejoradas */
.alert {
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin: 1.5rem auto;
    border: none;
    box-shadow: var(--box-shadow);
    animation: slideInDown 0.5s ease-out;
    backdrop-filter: blur(10px);
}

.alert-success {
    background: linear-gradient(135deg, rgba(70, 211, 105, 0.2) 0%, rgba(70, 211, 105, 0.1) 100%);
    border-left: 4px solid var(--success-color);
    color: var(--text-primary);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.2) 0%, rgba(244, 67, 54, 0.1) 100%);
    border-left: 4px solid var(--error-color);
    color: var(--text-primary);
}

.error-message {
    color: var(--error-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    animation: shake 0.5s ease-in-out;
}

.error-message::before {
    content: '⚠ ';
    margin-right: 0.5rem;
}

/* reCAPTCHA Container */
.recaptcha-container {
    display: flex;
    justify-content: center;
    margin: 1.5rem 0;
}

.g-recaptcha {
    transform: scale(0.95);
    transform-origin: center;
}

/* Mail Results */
.mail-card {
    background: linear-gradient(135deg, rgba(31, 31, 31, 0.9) 0%, rgba(20, 20, 20, 0.9) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    transition: var(--transition);
    animation: fadeInUp 0.6s ease-out;
}

.mail-card:hover {
    border-color: rgba(229, 9, 20, 0.5);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.mail-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mail-header img {
    width: 40px;
    height: 40px;
    margin-right: 15px;
    border-radius: 50%;
    border: 2px solid rgba(229, 9, 20, 0.3);
}

.mail-header h4 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.code-reveal-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-primary);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(229, 9, 20, 0.4);
}

.code-reveal-btn:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 9, 20, 0.6);
}

.code-content {
    text-align: center;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--border-radius);
    margin-top: 1rem;
}

.code-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-light);
    letter-spacing: 3px;
    text-shadow: 0 0 10px rgba(229, 9, 20, 0.5);
}

.login-link-btn {
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-primary);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    display: inline-block;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(229, 9, 20, 0.4);
}

.login-link-btn:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 9, 20, 0.6);
    text-decoration: none;
    color: var(--text-primary);
}

.time-ago {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 1rem;
    font-style: italic;
}

/* Loading Spinner */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

/* Animaciones */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.4rem !important;
    }
    
    .logo-container img {
        max-width: 280px;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .btn {
        padding: 0.65rem 1.5rem;
        font-size: 0.85rem;
    }
    
    .code-text {
        font-size: 1.4rem;
        letter-spacing: 2px;
    }
}

@media (max-width: 576px) {
    .navbar {
        padding: 0.75rem 1rem !important;
    }
    
    .logo-container {
        padding: 2rem 0 1rem 0;
    }
    
    .logo-container img {
        max-width: 220px;
    }
    
    .card-header h3 {
        font-size: 1.2rem;
    }
    
    .g-recaptcha {
        transform: scale(0.85);
    }
}

/* Utilidades */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 1rem;
}

.mb-3 {
    margin-bottom: 1rem;
}

.d-none {
    display: none;
}

.d-block {
    display: block;
}