:root {
    --login-bg-start: #1e3a5f;
    --login-bg-end: #0f1729;
    --login-surface: rgba(255, 255, 255, 0.04);
    --login-surface-hover: rgba(255, 255, 255, 0.08);
    --login-border: rgba(255, 255, 255, 0.1);
    --login-border-focus: rgba(255, 255, 255, 0.28);
    --login-text: #ffffff;
    --login-muted: rgba(255, 255, 255, 0.68);
    --login-placeholder: rgba(255, 255, 255, 0.48);
    --login-button-start: #4a6fa5;
    --login-button-end: #3d5a80;
    --login-button-hover-start: #5a7fb5;
    --login-button-hover-end: #4d6a90;
    --login-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

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

body {
    min-height: 100vh;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--login-bg-start) 0%, var(--login-bg-end) 100%);
    color: var(--login-text);
}

.login-page {
    width: 100%;
}

.login-container {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    padding: 40px;
    animation: fadeIn 0.6s ease;
}

.login-container.register {
    max-width: 980px;
}

.logo-container {
    text-align: center;
    margin-bottom: 40px;
}

.logo-image {
    width: 88px;
    max-width: 100%;
    height: auto;
    margin: 0 auto 20px;
    display: block;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.18));
}

.logo-container h1 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.logo-container p {
    margin-top: 10px;
    font-size: 15px;
    color: var(--login-muted);
}

.login-form {
    background: transparent;
}

.register-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.form-group {
    margin-bottom: 20px;
}

.input-group {
    position: relative;
}

.input-group input {
    width: 100%;
    padding: 16px 84px 16px 20px;
    background: var(--login-surface);
    border: 2px solid var(--login-border);
    border-radius: 12px;
    color: var(--login-text);
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.input-group input::placeholder {
    color: var(--login-placeholder);
}

.input-group input:focus {
    border-color: var(--login-border-focus);
    background: var(--login-surface-hover);
}

.input-group select,
.input-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: var(--login-surface);
    border: 2px solid var(--login-border);
    border-radius: 12px;
    color: var(--login-text);
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    appearance: none;
}

.input-group textarea {
    min-height: 128px;
    resize: vertical;
}

.input-group select:focus,
.input-group textarea:focus {
    border-color: var(--login-border-focus);
    background: var(--login-surface-hover);
}

.input-group option {
    color: #0f1729;
}

.toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    border: 0;
    background: transparent;
    color: var(--login-muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    text-transform: lowercase;
}

.toggle-password:hover {
    color: rgba(255, 255, 255, 0.88);
}

.form-submit {
    margin-top: 10px;
}

.btn-login {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--login-button-start) 0%, var(--login-button-end) 100%);
    border: 0;
    border-radius: 12px;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--login-shadow);
}

.btn-login:hover {
    background: linear-gradient(135deg, var(--login-button-hover-start) 0%, var(--login-button-hover-end) 100%);
    transform: translateY(-2px);
    box-shadow: 0 24px 34px rgba(0, 0, 0, 0.32);
}

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

.auth-upload {
    display: grid;
    gap: 8px;
    padding: 18px 20px;
    border: 2px dashed rgba(255, 255, 255, 0.18);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
}

.auth-upload label {
    font-size: 14px;
    font-weight: 600;
    color: var(--login-text);
}

.auth-upload input[type="file"] {
    width: 100%;
    color: var(--login-muted);
}

.auth-links {
    margin-top: 18px;
    text-align: center;
}

.auth-links a {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    font-size: 14px;
}

.auth-links a:hover {
    color: #ffffff;
}

@media (max-width: 480px) {
    body {
        padding: 15px;
    }

    .login-container {
        padding: 30px 24px;
    }

    .register-grid {
        grid-template-columns: 1fr;
    }

    .logo-image {
        width: 76px;
    }

    .logo-container h1 {
        font-size: 24px;
    }

    .input-group input,
    .btn-login {
        font-size: 16px;
    }
}

@media (max-width: 360px) {
    .login-container {
        padding: 24px 18px;
    }

    .logo-image {
        width: 64px;
    }
}

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

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