body {
    font-family: system-ui, sans-serif;
    background: #f0f2f5;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
}

.container--wide {
    max-width: 620px;
}

h1 { margin: 0 0 0.5rem; color: #333; }
h2 { margin: 0 0 1.5rem; text-align: center; color: #333; }

.welcome {
    color: #0066ff;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 1.8rem;
    border-bottom: 2px solid #eee;
}
.tab {
    flex: 1;
    text-align: center;
    padding: 0.9rem;
    cursor: pointer;
    font-weight: 500;
    color: #666;
    transition: all 0.2s;
}
.tab.active {
    color: #0066ff;
    border-bottom: 3px solid #0066ff;
}

/* Form containers */
.form-container {
    display: none;
}
.form-container.active {
    display: block;
}

/* Inputs */
input[type="text"],
input[type="email"],
input[type="password"],
.form-input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 1rem;
}

textarea.form-input {
    resize: vertical;
    min-height: 140px;
    margin: 8px 0 15px;
}

/* Buttons */
button {
    width: 100%;
    padding: 12px;
    background: #0066ff;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1.05rem;
    cursor: pointer;
    margin-top: 12px;
    transition: background 0.2s;
}
button:hover {
    background: #0055dd;
}

/* Messages */
.messages {
    margin-bottom: 1rem;
    padding: 10px;
    border-radius: 6px;
}
.success { background: #e6ffed; color: #006600; }
.error   { background: #ffebee; color: #c62828; }

/* Feedback section */
.feedback-section {
    background: #f8f9fa;
    padding: 1.8rem;
    border-radius: 10px;
    border: 1px solid #e9ecef;
    margin-top: 2rem;
}
.feedback-section h2 {
    margin: 0 0 1rem 0;
    text-align: left;
}

/* Logout */
.logout-btn {
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
    text-decoration: underline;
    font-size: 1rem;
    padding: 0;
    margin-top: 0;
    width: auto;
}
.logout-btn:hover {
    color: #c62828;
    background: none;
}