:root {
    --bg-color: #1a1a1a;
    --card-bg: #242424;
    --primary-color: #646cff;
    --primary-hover: #7c82ff;
    --text-color: #ffffff;
    --input-border: rgba(255, 255, 255, 0.1);
    --input-border-focus: rgba(100, 108, 255, 0.4);
    --error-color: #ff4444;
    --success-color: #4caf50;
    --input-bg: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.form-container {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.tabs {
    display: flex;
    margin-bottom: 2rem;
    gap: 1rem;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    font-size: 1rem;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: rgba(255, 255, 255, 0.9);
}

.tab-btn.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
}

.form {
    display: none;
}

.form.active {
    display: block;
}

.form-group {
    margin-bottom: 1.25rem;
}

.password-requirements {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 0.25rem;
    transition: color 0.2s ease;
}

input[type="email"] {
    text-transform: lowercase;
}

input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

input:invalid {
    box-shadow: none;
}

input:focus {
    outline: none;
    border-color: var(--input-border-focus);
    background-color: rgba(255, 255, 255, 0.07);
}

input:not(:placeholder-shown):invalid {
    border-color: var(--error-color);
}

input:not(:placeholder-shown):invalid:focus {
    border-color: var(--input-border-focus);
}

.submit-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background-color: var(--primary-hover);
}

.error-message {
    background-color: rgba(255, 68, 68, 0.1);
    border: 1px solid rgba(255, 68, 68, 0.2);
    color: #ff8080;
}

.success-message {
    background-color: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.2);
    color: #81c784;
}

.message {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.4;
}

.setup-container {
    text-align: center;
}

.setup-container h1 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.setup-intro {
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.5;
}

.setup-container form {
    text-align: left;
    margin-top: 2rem;
}

input[name="firstName"],
input[name="lastName"] {
    text-transform: capitalize;
}

input:invalid {
    border-color: var(--input-border);
    box-shadow: none;
}

input:not(:placeholder-shown):invalid {
    border-color: var(--error-color);
}

.form-group input[type="text"]:invalid + .validation-message {
    display: block;
    color: var(--error-color);
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

.form-group input[type="text"]:valid + .validation-message {
    display: none;
}

.validation-message {
    display: none;
    color: var(--error-color);
    font-size: 0.8rem;
    margin-top: 0.25rem;
    opacity: 0.9;
}

input:not(:placeholder-shown):invalid + .validation-message {
    display: block;
}

input:focus + .password-requirements {
    color: rgba(255, 255, 255, 0.7);
}

.oauth-login {
    margin-top: 1rem;
}

.oauth-login .submit-btn {
    display: block;
    text-align: center;
    text-decoration: none;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
}

.oauth-login .submit-btn:hover {
    background-color: var(--card-bg);
    border-color: var(--primary-color);
}

.form-links {
    text-align: center;
    margin-top: 1rem;
}

.form-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.form-links a:hover {
    color: var(--primary-color);
}

.form-description {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.4;
}