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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    position: relative;
    overflow: hidden;
}

/* Efeito de partículas animadas no fundo */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0,123,255,0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0,123,255,0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255,255,255,0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.login-container {
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 1px 3px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    animation: slideUp 0.8s ease-out;
}

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

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0,123,255,0.1), transparent);
    transform: translateX(-100%);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
    100% { transform: translateX(100%); }
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
    z-index: 2;
}

.login-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 10px 30px rgba(0,123,255,0.25);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.login-logo i {
    font-size: 2rem;
    color: white;
}

.login-brand {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #007bff, #0056b3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.login-subtitle {
    color: #6c757d;
    font-size: 1rem;
    font-weight: 500;
}

.login-form {
    position: relative;
    z-index: 2;
}

.form-group {
    margin-bottom: 1.8rem;
    position: relative;
}

.input-group {
    position: relative;
    transition: all 0.3s ease;
}

.input-group:hover {
    transform: translateY(-2px);
}

.form-control {
    width: 100%;
    padding: 1rem 1rem 1rem 3.5rem;
    border: 2px solid rgba(0,123,255,0.1);
    border-radius: 16px;
    font-size: 1rem;
    background: rgba(248, 249, 250, 0.8);
    transition: all 0.3s ease;
    outline: none;
}

.form-control:focus {
    border-color: rgba(0,123,255,0.5);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 0 4px rgba(0,123,255,0.1);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: #adb5bd;
    font-weight: 500;
}

.input-group-icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: #007bff;
    font-size: 1.1rem;
    z-index: 1;
    transition: all 0.3s ease;
}

.input-group:hover .input-group-icon {
    color: #0056b3;
    transform: translateY(-50%) scale(1.1);
}

.remember-me {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    color: #6c757d;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 0.8rem;
    accent-color: #007bff;
    cursor: pointer;
}

.remember-me label {
    cursor: pointer;
    user-select: none;
}

.btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,123,255,0.25);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0,123,255,0.3);
}

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

.btn i {
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.btn:hover i {
    transform: translateX(5px);
}

.login-footer {
    text-align: center;
    margin-top: 2.5rem;
    position: relative;
    z-index: 2;
}

.login-footer a {
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.login-footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    transition: width 0.3s ease;
}

.login-footer a:hover::after {
    width: 100%;
}

.login-footer a:hover {
    color: #0056b3;
}

.login-footer p {
    color: #6c757d;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.alert {
    padding: 1rem 1.2rem;
    margin-bottom: 2rem;
    border-radius: 12px;
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.2);
    color: #721c24;
    font-weight: 500;
    animation: shake 0.5s ease-in-out;
}

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

/* Responsividade Melhorada */

/* Tablets e telas médias */
@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }
    
    .login-container {
        max-width: 100%;
        width: 100%;
    }
    
    .login-card {
        padding: 2.5rem 2rem;
        border-radius: 20px;
    }
    
    .login-brand {
        font-size: 2.5rem;
    }
    
    .form-control {
        padding: 1rem 1rem 1rem 3.2rem;
        font-size: 16px; /* Evita zoom no iOS */
    }
}

/* Smartphones */
@media (max-width: 480px) {
    body {
        padding: 0.25rem;
        align-items: flex-start;
        padding-top: 2rem;
    }
    
    .login-container {
        width: 100%;
        max-width: none;
    }
    
    .login-card {
        padding: 2rem 1.5rem;
        margin: 0;
        border-radius: 16px;
        min-height: auto;
    }
    
    .login-header {
        margin-bottom: 2rem;
    }
    
    .login-logo {
        width: 70px;
        height: 70px;
        border-radius: 16px;
        margin-bottom: 1.2rem;
    }
    
    .login-logo i {
        font-size: 1.8rem;
    }
    
    .login-brand {
        font-size: 2.2rem;
        letter-spacing: -0.5px;
    }
    
    .login-subtitle {
        font-size: 0.9rem;
    }
    
    .form-group {
        margin-bottom: 1.5rem;
    }
    
    .form-control {
        padding: 0.9rem 0.9rem 0.9rem 3rem;
        font-size: 16px; /* Importante para iOS */
        border-radius: 12px;
    }
    
    .input-group-icon {
        left: 1rem;
        font-size: 1rem;
    }
    
    .btn {
        padding: 0.9rem;
        font-size: 1rem;
        border-radius: 12px;
    }
    
    .remember-me {
        margin-bottom: 1.5rem;
        font-size: 0.9rem;
    }
    
    .login-footer {
        margin-top: 2rem;
    }
    
    .login-footer p {
        font-size: 0.85rem;
    }
}

/* Smartphones pequenos */
@media (max-width: 360px) {
    .login-card {
        padding: 1.5rem 1.2rem;
    }
    
    .login-brand {
        font-size: 2rem;
    }
    
    .form-control {
        padding: 0.8rem 0.8rem 0.8rem 2.8rem;
    }
    
    .input-group-icon {
        left: 0.9rem;
    }
}

/* Landscape em smartphones */
@media (max-height: 600px) and (orientation: landscape) {
    body {
        align-items: center;
        padding: 1rem;
    }
    
    .login-card {
        padding: 1.5rem 2rem;
    }
    
    .login-header {
        margin-bottom: 1.5rem;
    }
    
    .login-logo {
        width: 60px;
        height: 60px;
        margin-bottom: 1rem;
    }
    
    .login-brand {
        font-size: 2rem;
        margin-bottom: 0.3rem;
    }
    
    .login-subtitle {
        font-size: 0.85rem;
    }
    
    .form-group {
        margin-bottom: 1.2rem;
    }
    
    .remember-me {
        margin-bottom: 1.2rem;
    }
    
    .login-footer {
        margin-top: 1.5rem;
    }
}

/* Telas muito grandes */
@media (min-width: 1200px) {
    .login-container {
        max-width: 450px;
    }
    
    .login-card {
        padding: 3.5rem 3rem;
    }
}

/* Animação de entrada suave */
.form-group {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.btn { animation: fadeInUp 0.6s ease-out 0.4s forwards; opacity: 0; }

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