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

:root {
    --sd-black: #111111;
    --sd-charcoal: #2b2b2f;
    --sd-white: #ffffff;
    --sd-gray-100: #f5f5f6;
    --sd-gray-200: #ececec;
    --sd-gray-500: #6b7280;
    --sd-gray-600: #4b5563;
    --sd-wine: #7a1f2b;
    --sd-wine-dark: #5b1620;
    --sd-wine-soft: #8f2a38;
    --radius-xl: 0px;
    --frost-bg: rgba(255, 255, 255, 0.58);
    --frost-border: rgba(209, 213, 219, 0.68);
    --frost-shadow: 0 10px 22px rgba(2, 12, 27, 0.18);
    --frost-inset: 0 0 0 1px rgba(191, 219, 254, 0.18) inset;
    --frost-blur: 12px;
    --frost-saturate: 145%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--sd-wine) 0%, var(--sd-charcoal) 35%, var(--sd-wine) 70%, var(--sd-wine-dark) 100%);
    background-size: 400% 400%;
    animation: gradientWave 12.75s ease infinite;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes gradientWave {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.screen {
    display: none;
}

.screen.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.login-layout {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 16px;
    width: min(920px, 96vw);
}

.login-container {
    background: var(--frost-bg);
    padding: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--frost-border);
    box-shadow: var(--frost-shadow), var(--frost-inset);
    backdrop-filter: blur(var(--frost-blur)) saturate(var(--frost-saturate));
    -webkit-backdrop-filter: blur(var(--frost-blur)) saturate(var(--frost-saturate));
    width: 90%;
    max-width: 420px;
    margin: 0 20px;
}

.login-shortcuts {
    background: var(--frost-bg);
    border: 1px solid var(--frost-border);
    box-shadow: var(--frost-shadow), var(--frost-inset);
    backdrop-filter: blur(var(--frost-blur)) saturate(var(--frost-saturate));
    -webkit-backdrop-filter: blur(var(--frost-blur)) saturate(var(--frost-saturate));
    border-radius: var(--radius-xl);
    padding: 20px 16px;
    width: 220px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.login-shortcuts__title {
    margin: 0;
    color: var(--sd-wine);
    font-size: 18px;
    font-weight: 700;
}

.login-shortcuts__hint {
    margin: 0 0 4px 0;
    color: var(--sd-gray-500);
    font-size: 13px;
}

.btn-quick {
    width: 100%;
    background: var(--sd-charcoal);
    color: var(--sd-white);
    border: 1px solid var(--sd-charcoal);
}

.btn-quick:hover {
    background: var(--sd-wine);
    border-color: var(--sd-wine);
}

.btn-quick:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

@media (max-width: 480px) {
    .login-layout {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 12px;
    }

    .login-container {
        padding: 30px 20px;
        width: 90%;
        margin: 0 15px;
    }

    .login-shortcuts {
        width: 90%;
        margin: 0 15px;
    }

    .logo-img {
        width: 120px;
        height: 120px;
    }

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

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo-img {
    width: 160px;
    height: 160px;
    margin-bottom: 15px;
}

.logo h1 {
    font-size: 28px;
    color: var(--sd-wine);
    margin-bottom: 5px;
}

.logo p {
    color: #666;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--radius-xl);
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--sd-wine);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 0;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--sd-wine);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: var(--sd-wine);
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 0;
    margin-bottom: 15px;
    display: none;
}

a {
    color: var(--sd-wine-soft);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}