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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0b0e13 0%, #1a1f2e 50%, #0b0e13 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #e7eaf0;
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Partículas de fondo animadas */
body::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 106, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 154, 60, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 106, 0, 0.05) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.login-container {
    background: rgba(18, 23, 34, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 106, 0, 0.2);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 420px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(255, 106, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 1;
    animation: slideIn 0.6s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.logo-container {
    margin-bottom: 1.25rem;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.company-logo {
    max-width: 120px;
    max-height: 80px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(255, 106, 0, 0.3));
}

.logo-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto;
    background: linear-gradient(135deg, #ff6a00, #ff9a3c);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 25px rgba(255, 106, 0, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 8px 25px rgba(255, 106, 0, 0.3); }
    50% { transform: scale(1.03); box-shadow: 0 12px 35px rgba(255, 106, 0, 0.4); }
}

.logo-icon i {
    font-size: 2rem;
    color: #0b0e13;
}

.login-header h1 {
    font-size: 1.9rem;
    font-weight: 900;
    background: linear-gradient(135deg, #ff6a00, #ff9a3c, #ffd2a4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.4rem;
    letter-spacing: 1.5px;
    text-shadow: 0 0 30px rgba(255, 106, 0, 0.3);
}

.login-header .subtitle {
    color: #8b95a7;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    letter-spacing: 0.5px;
}

.login-header .tagline {
    color: #ff6a00;
    font-size: 0.8rem;
    margin-top: 0.4rem;
    font-weight: 500;
    opacity: 0.9;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    font-weight: 600;
    color: #e7eaf0;
    font-size: 0.9rem;
}

.form-group label i {
    color: #ff6a00;
    font-size: 1rem;
}

.input-wrapper {
    position: relative;
}

.input-wrapper i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #8b95a7;
    transition: color 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.form-group input:focus ~ .input-wrapper i,
.form-group input:not(:placeholder-shown) ~ .input-wrapper i {
    color: #ff6a00;
}

.form-group input {
    width: 100%;
    padding: 0.85rem 1rem 0.85rem 3rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    font-size: 0.95rem;
    background: rgba(11, 14, 19, 0.6);
    color: #e7eaf0;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.form-group input::placeholder {
    color: #5a6578;
}

.form-group input:focus {
    outline: none;
    border-color: #ff6a00;
    box-shadow: 
        0 0 0 3px rgba(255, 106, 0, 0.12),
        0 6px 20px rgba(255, 106, 0, 0.15);
    background: rgba(255, 106, 0, 0.04);
}

.form-group input:focus ~ .input-wrapper i {
    color: #ff6a00;
}

.btn-login {
    width: 100%;
    background: linear-gradient(135deg, #ff6a00, #ff9a3c);
    color: #0b0e13;
    border: none;
    padding: 0.9rem 1.5rem;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.75rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(255, 106, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-login:hover::before {
    width: 300px;
    height: 300px;
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 106, 0, 0.5);
}

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

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-login i {
    transition: transform 0.3s ease;
}

.btn-login:hover:not(:disabled) i {
    transform: translateX(5px);
}

.validation-summary {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border: 1.5px solid rgba(239, 68, 68, 0.25);
    border-radius: 10px;
    padding: 0.9rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
    animation: shake 0.5s ease;
}

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

.validation-summary ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.validation-summary li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.validation-summary li:last-child {
    margin-bottom: 0;
}

.validation-summary li::before {
    content: '⚠';
    font-size: 1.2rem;
}

.field-error {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding-left: 0.25rem;
}

/* Ocultar el span de validación cuando está vacío */
.field-error:empty {
    display: none;
}

.field-error::before {
    content: '⚠';
    font-size: 0.85rem;
    margin-right: 0.15rem;
}

/* Responsive */
@media (max-width: 480px) {
    .login-container {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }

    .login-header h1 {
        font-size: 1.8rem;
    }

    .logo-icon {
        width: 60px;
        height: 60px;
    }

    .logo-icon i {
        font-size: 2rem;
    }
}

/* Loading spinner */
.btn-login.loading {
    pointer-events: none;
}

.btn-login.loading .btn-text {
    opacity: 0;
}

.btn-login.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(11, 14, 19, 0.3);
    border-top-color: #0b0e13;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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