:root {
    --login-accent: #667eea;
    --login-accent-deep: #764ba2;
    --login-accent-ring: rgba(102, 126, 234, 0.15);
    --login-surface: rgba(255, 255, 255, 0.98);
    --login-text: #333;
    --login-radius: 6px;
    --login-panel-radius: 12px;
    --login-control-height: 45px;
    --login-field-gap: 20px;
}

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

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    color: var(--login-text);
    background: linear-gradient(135deg, var(--login-accent) 0%, var(--login-accent-deep) 100%);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.login-container {
    width: 400px;
    max-width: 100%;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: var(--login-panel-radius);
    background: var(--login-surface);
    box-shadow: 0 18px 45px rgba(43, 31, 86, 0.28);
}

.form-group {
    margin-bottom: var(--login-field-gap);

    label {
        display: block;
        margin-bottom: 8px;
        color: var(--login-text);
        font-weight: 600;
    }

    input {
        width: 100%;
        height: var(--login-control-height);
        padding: 0 12px;
        border: 1px solid #ddd;
        border-radius: var(--login-radius);
        background: #fff;
        font-size: 14px;
        transition: border-color 0.2s, box-shadow 0.2s;

        &:focus {
            outline: none;
            border-color: var(--login-accent);
            box-shadow: 0 0 0 3px var(--login-accent-ring);
        }
    }
}

.login-btns,
.inline-row {
    display: flex;
    gap: 10px;
}

.login-btn {
    width: 100%;
    padding: 12px;
    border: 0;
    border-radius: var(--login-radius);
    color: #fff;
    background: linear-gradient(135deg, var(--login-accent) 0%, var(--login-accent-deep) 100%);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;

    &.login-btn-login,
    &.login-btn-signup {
        flex: 1;
    }

    &.login-btn-signup {
        background: linear-gradient(135deg, #8993a8 0%, #646e83 100%);
    }

    &.login-btn-signup-done {
        background: linear-gradient(135deg, var(--login-accent) 0%, var(--login-accent-deep) 100%);
    }

    &:hover:not(:disabled) {
        transform: translateY(-2px);
        box-shadow: 0 7px 16px rgba(76, 64, 145, 0.22);
    }

    &:disabled {
        cursor: not-allowed;
        opacity: 0.5;
    }
}

.error-message {
    display: none;
    margin-bottom: var(--login-field-gap);
    padding: 10px;
    border-radius: 5px;
    background: #fee;
    color: #c33;
    text-align: center;

    &.show {
        display: block;
    }
}

.signup-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(35, 27, 69, 0.62);
    backdrop-filter: blur(4px);

    .signup-modal-content {
        position: relative;
        width: 470px;
        max-width: 100%;
        max-height: 90vh;
        overflow-y: auto;
        padding: 32px;
        border: 1px solid rgba(255, 255, 255, 0.55);
        border-radius: var(--login-panel-radius);
        background: #fff;
        box-shadow: 0 22px 60px rgba(24, 17, 53, 0.38);
    }

    .signup-modal-title {
        margin-bottom: 24px;
        color: var(--login-text);
    }

    .signup-modal-close {
        position: absolute;
        top: 12px;
        right: 16px;
        border: 0;
        background: transparent;
        color: #444;
        font-size: 28px;
        line-height: 1;
        cursor: pointer;
    }
}

.inline-row {
    input {
        flex: 1;
        min-width: 0;
    }

    .inline-button {
        flex: 0 0 auto;
        padding: 0 14px;
        border: 1px solid #d9dcf1;
        border-radius: var(--login-radius);
        background: #eef0ff;
        color: #4f56a6;
        font-weight: 700;
        cursor: pointer;
        transition: background 0.2s, color 0.2s;

        &:hover {
            background: var(--login-accent);
            color: #fff;
        }
    }
}

.verification-status,
.notice {
    margin-top: 8px;
    color: #d97706;
    font-size: 13px;
}

.verification-status {
    &.verified {
        color: #16803c;
        font-weight: 700;
    }
}

.notice {
    margin-bottom: 18px;
    color: #666;
}

@media (max-width: 480px) {
    body {
        padding: 14px;
    }

    .login-container,
    .signup-modal .signup-modal-content {
        padding: 28px 22px;
    }

    .inline-row .inline-button {
        padding: 0 10px;
        font-size: 12px;
    }
}