:root {
    --transition: var(--transition-speed) ease;
    --primary-dark-gradient: linear-gradient(135deg, var(--indigo), var(--purple));
    --hover-gradient: linear-gradient(135deg, var(--indigo), var(--indigo));
    --input-radius: 0.75rem;
}

.login__card {
    border: none;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: white;
    margin-bottom: 2rem;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    max-width: clamp(300px, 90vw, 550px);
    margin-left: auto;
    margin-right: auto;
}

.login__card:hover {
    box-shadow: 0 12px 30px rgba(75, 0, 130, 0.2);
}

.login__card-header {
    background: var(--primary-dark-gradient);
    color: white;
    padding: 2.5rem 2rem !important;
    border-bottom: none;
    position: relative;
    overflow: hidden;
}

.login__card-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    transform: rotate(30deg);
    z-index: 1;
    animation: waveAnimation 15s infinite linear;
}

@keyframes waveAnimation {
    0% {
        transform: rotate(0deg) translateY(0);
    }

    25% {
        transform: rotate(10deg) translateY(-5%);
    }

    50% {
        transform: rotate(0deg) translateY(0);
    }

    75% {
        transform: rotate(-10deg) translateY(5%);
    }

    100% {
        transform: rotate(0deg) translateY(0);
    }
}

.login__card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 30px;
}

.login__card-header h2,
.login__card-header p {
    position: relative;
    z-index: 3;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.login__card-header h2 {
    font-weight: 700;
    letter-spacing: 0.5px;
    animation: fadeInDown 0.8s ease;
    font-size: clamp(1.5rem, 5vw, 2.2rem);
}

.login__card-header p {
    opacity: 0.85;
    animation: fadeInUp 0.8s ease;
    font-size: clamp(0.85rem, 4vw, 1.1rem);
}

.login__form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color 0.2s ease;
    animation: fadeInLeft 0.5s ease backwards;
    font-size: clamp(0.8rem, 2vw, 0.95rem);
}

.login__input-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 0.5rem;
    border: 2px solid var(--purple);
    transition: all var(--transition);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    animation: fadeInUp 0.5s ease backwards;
}

.login__input-group:hover {
    border: 2px solid var(--primary);
}

.login__input-group:focus-within {
    border-color: var(--purple);
    box-shadow: 0 4px 10px rgba(75, 0, 130, 0.1);
    background: rgba(255, 255, 255, 0.9);
}

.login__input-group:focus-within .login__icon-container {
    color: var(--purple);
    transform: scale(1.1);
}

.login__icon-container .icon-focus {
    display: none;
    opacity: 0;
}

.login__icon-container .icon-default {
    display: block;
    opacity: 1;
}

.login__input-group:focus-within .login__icon-container .icon-default {
    display: none;
    opacity: 0;
}

.login__input-group:focus-within .login__icon-container .icon-focus {
    display: block;
    opacity: 1;
    animation: iconAppear 0.3s forwards;
}

@keyframes iconAppear {
    0% {
        transform: scale(0) rotate(-45deg);
        opacity: 0;
    }

    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

.login__icon-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    color: var(--indigo);
    font-size: 1.1rem;
    transition: all var(--transition);
    border-radius: 50%;
    font-size: clamp(1rem, 3vw, 1.3rem);
}

.login__icon-container i {
    width: 1.2rem;
    text-align: center;
}

.login__form-control {
    flex: 1;
    height: 3rem;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--dark);
    background: transparent;
    border: none;
    border-radius: 0;
    transition: all var(--transition);
    font-size: clamp(0.85rem, 3vw, 1.1rem);
    padding: clamp(0.5rem, 2vw, 0.75rem) clamp(0.75rem, 3vw, 1rem);
}

.login__form-control:focus {
    outline: none;
    box-shadow: none;
}

.login__form-control::placeholder {
    color: var(--smoke);
    opacity: 1;
    transition: opacity 0.3s ease;
}

.login__form-control:focus::placeholder {
    opacity: 0.7;
}

.login__password-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: transparent;
    border: none;
    color: var(--smoke);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all var(--transition);
    border-radius: 50%;
}

.login__password-toggle:hover {
    color: var(--indigo);
    background: rgba(75, 0, 130, 0.08);
}

.login__password-toggle i {
    width: 1.2rem;
}

.login__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 3.5rem;
    background: var(--primary-dark-gradient);
    color: white;
    border: none;
    border-radius: var(--input-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(75, 0, 130, 0.2);
    animation: fadeInUp 0.8s ease backwards;
    animation-delay: 0.2s;
    font-size: clamp(0.85rem, 3vw, 1.1rem);
    height: clamp(3rem, 10vh, 3.5rem);
}

.login__btn:hover {
    background: var(--hover-gradient);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(75, 0, 130, 0.3);
}

.login__btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(75, 0, 130, 0.2);
}

.login__btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 250%;
    height: 250%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: transform 0.6s ease-out, opacity 0.6s ease-out;
}

.login__btn:hover::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.login__forgot-link {
    color: var(--dark);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    position: relative;
    display: inline-block;
    animation: fadeIn 0.8s ease backwards;
    animation-delay: 0.3s;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
}

.login__forgot-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--purple);
    transition: width 0.3s ease;
}

.login__forgot-link:hover {
    color: var(--purple);
}

.login__forgot-link:hover::after {
    width: 100%;
}


.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 1rem;
    margin-bottom: 1rem;
    padding-left: 0;
    animation: fadeInLeft 0.6s ease backwards;
    animation-delay: 0.1s;
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin: 0;
    flex-shrink: 0;
    accent-color: var(--purple);
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-check-input:checked {
    transform: scale(1.1);
}

.form-check-label {
    font-size: 0.9rem;
    color: var(--dark);
    cursor: pointer;
    margin-bottom: 0;
    padding-top: 0.1rem;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
}

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    padding-left: 0;
    animation: fadeInLeft 0.6s ease backwards;
    animation-delay: 0.1s;
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin: 0;
    margin-right: 1rem;
    flex-shrink: 0;
    accent-color: var(--purple);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    float: none;
}

.form-check-label {
    font-size: 0.9rem;
    color: var(--dark);
    cursor: pointer;
    margin-bottom: 0;
    font-weight: normal;
    display: inline-block;
}


.alert {
    border: none;
    border-radius: var(--input-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    border-left: 4px solid #dc3545;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes shake {

    10%,
    90% {
        transform: translateX(-1px);
    }

    20%,
    80% {
        transform: translateX(2px);
    }

    30%,
    50%,
    70% {
        transform: translateX(-4px);
    }

    40%,
    60% {
        transform: translateX(4px);
    }
}

@media (max-width: 768px) {
    .login__card {
        margin: 1rem;
    }

    .login__card-header {
        padding: 2rem 1.5rem !important;
    }
}

@media (max-width: 425px) {
    .login__card {
        margin: 0.5rem;
        border-radius: calc(var(--card-radius) * 0.8);
    }

    .login__card-header {
        padding: 1.5rem !important;
    }

    .login__card-body {
        padding: 1.5rem;
    }

    .login__input-group {
        padding: 0.3rem;
        gap: 0.4rem;
    }

    .login__icon-container {
        width: 2rem;
        height: 2rem;
    }

    .login__form-control {
        height: 2.5rem;
    }

    .form-check-input {
        width: 1rem;
        height: 1rem;
        margin-right: 0.75rem;
    }
}

@media (min-width: 426px) and (max-width: 768px) {
    .login__card {
        margin: 1rem;
    }

    .login__card-header {
        padding: 2rem !important;
    }

    .login__card-body {
        padding: 2rem;
    }

    .login__input-group {
        padding: 0.4rem;
        gap: 0.5rem;
    }

    .login__icon-container {
        width: 2.25rem;
        height: 2.25rem;
    }

    .login__form-control {
        height: 2.75rem;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .login__card {
        margin: 1.5rem auto;
        max-width: 500px;
    }

    .login__card-header {
        padding: 2.5rem !important;
    }

    .login__card-body {
        padding: 2.5rem;
    }
}

@media (min-width: 1440px) {
    .login__card {
        margin: 2rem auto;
        max-width: 550px;
        transform: scale(1.05);
    }

    .login__card-header {
        padding: 3rem !important;
    }

    .login__card-body {
        padding: 3rem;
    }

    .login__input-group {
        padding: 0.6rem;
        gap: 0.9rem;
    }

    .login__icon-container {
        width: 2.75rem;
        height: 2.75rem;
    }

    .login__form-control {
        height: 3.25rem;
    }

    .login__btn {
        height: 4rem;
    }
}