:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --success-color: #4cc9f0;
    --text-color: #2b2d42;
    --light-text: #8d99ae;
}

body {
    min-height: 100vh;
    background: #000428;
    background: linear-gradient(45deg, #004e92, #000428);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', sans-serif;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

/* Animation de fond */
body::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: linear-gradient(
        45deg,
        transparent 25%,
        rgba(255, 255, 255, 0.05) 50%,
        transparent 75%
    );
    animation: wave 8s infinite linear;
    z-index: 0;
}

@keyframes wave {
    0% {
        transform: rotate(0deg) scale(1.5) translateY(0);
    }
    100% {
        transform: rotate(360deg) scale(1.5) translateY(0);
    }
}

.login-container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 450px;
    backdrop-filter: blur(20px);
    position: relative;
    z-index: 1;
    transform: translateY(0);
    transition: all 0.3s ease;
}

.login-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-header i {
    font-size: 3.5rem;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.login-title {
    color: var(--text-color);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.form-floating {
    margin-bottom: 1.8rem;
}

.form-floating > .form-control {
    padding: 1.2rem 1rem;
    height: calc(3.8rem + 2px);
    line-height: 1.25;
    border-radius: 12px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-floating > .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
}

.form-floating > label {
    padding: 1.2rem 1rem;
    color: var(--light-text);
}

.password-field {
    position: relative;
}

.password-toggle {
    position: absolute;
    top: 50%;
    right: 1.2rem;
    transform: translateY(-50%);
    border: none;
    background: transparent;
    color: var(--light-text);
    cursor: pointer;
    z-index: 5;
    padding: 0.5rem;
    transition: all 0.3s ease;
}

.password-toggle:hover {
    color: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
}

.password-toggle:focus {
    outline: none;
    color: var(--primary-color);
}

.login-button {
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    border: none;
    padding: 1rem;
    border-radius: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.login-button::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: 0.5s;
}

.login-button:hover::before {
    left: 100%;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.3);
}

.login-button:active {
    transform: translateY(0);
}

.error-message {
    color: #ef233c;
    font-size: 0.9rem;
    margin-top: 0.7rem;
    padding: 0.8rem;
    background: rgba(239, 35, 60, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.error-message i {
    font-size: 1.1rem;
}

/* Input autofill styles */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
    -webkit-text-fill-color: var(--text-color);
    -webkit-box-shadow: 0 0 0px 1000px white inset;
    transition: background-color 5000s ease-in-out 0s;
}

@media (max-width: 576px) {
    .login-container {
        margin: 1rem;
        padding: 2rem;
    }

    .login-title {
        font-size: 1.8rem;
    }
}

/* Loading indicator on button */
.login-button.loading {
    position: relative;
    pointer-events: none;
}

.login-button.loading span {
    opacity: 0;
}

.login-button.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid #ffffff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: button-loading 0.8s ease infinite;
}

@keyframes button-loading {
    from {
        transform: translate(-50%, -50%) rotate(0turn);
    }
    to {
        transform: translate(-50%, -50%) rotate(1turn);
    }
}