:root {
    --pure-white: #ffffff;
    --light-gray: #f5f5f7;
    --medium-gray: #e5e5ea;
    --dark-gray: #8e8e93;
    --almost-black: #1c1c1e;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--pure-white);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    color: var(--almost-black);
    overflow-x: hidden;
}

.login-container {
    width: 100%;
    max-width: 100%;
    background-color: var(--pure-white);
    border-radius: 20px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transform: scale(0.95);
    opacity: 0;
    animation: scaleUp 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    border: 1px solid var(--medium-gray);
}

.login-header {
    padding: 30px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

    .login-header::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, var(--pure-white) 0%, var(--light-gray) 100%);
        z-index: -1;
    }

    .login-header h1 {
        font-weight: 600;
        font-size: 1.8rem;
        color: var(--almost-black);
        position: relative;
        display: inline-block;
    }

        .login-header h1::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: var(--almost-black);
            border-radius: 3px;
        }

.login-form {
    padding: 30px 25px;
}

.form-group {
    position: relative;
    margin-bottom: 25px;
    z-index: 1;
}

    .form-group::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: var(--light-gray);
        border-radius: 12px;
        z-index: -1;
        transform: scaleY(0);
        transform-origin: bottom;
        transition: var(--transition);
    }

    .form-group.focused::before {
        transform: scaleY(1);
    }

    .form-group label {
        position: absolute;
        top: 18px;
        left: 20px;
        color: var(--dark-gray);
        font-size: 0.95rem;
        transition: var(--transition);
        pointer-events: none;
        transform-origin: left;
    }

    .form-group input {
        width: 100%;
        padding: 20px;
        border: none;
        background-color: transparent;
        border-radius: 12px;
        font-size: 1rem;
        transition: var(--transition);
        color: var(--almost-black);
        font-weight: 500;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    }

        .form-group input:focus {
            outline: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

            .form-group input:focus + label,
            .form-group input:not(:placeholder-shown) + label {
                transform: translateY(-28px) scale(0.85);
                color: var(--almost-black);
                font-weight: 500;
            }

.password-toggle {
    position: absolute;
    right: 20px;
    top: 20px;
    cursor: pointer;
    color: var(--dark-gray);
    transition: var(--transition);
}

    .password-toggle:hover {
        color: var(--almost-black);
        transform: scale(1.1);
    }

.login-button {
    width: 100%;
    padding: 18px;
    background-color: var(--almost-black);
    color: var(--pure-white);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

    .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: var(--transition);
    }

    .login-button:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }

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

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

.error-message {
    color: #ff3b30;
    font-size: 0.85rem;
    margin-top: 5px;
    display: none;
    animation: shake 0.4s ease;
}

/* Animasyonlar */
@keyframes scaleUp {
    from {
        transform: scale(0.95);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }

    20%, 60% {
        transform: translateX(-5px);
    }

    40%, 80% {
        transform: translateX(5px);
    }
}

/* Mobil optimizasyonlar */
@media (max-width: 480px) {
    .login-header {
        padding: 25px 15px;
    }

    .login-form {
        padding: 25px 15px;
    }

    .form-group input {
        padding: 18px;
    }

    .login-button {
        padding: 16px;
    }
}

@media (min-width: 768px) {
    .login-container {
        max-width: 400px;
    }
}