/* Theme variables */
:root {
    --bg-primary: #f4f4f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f8f8;
    --text-primary: #1a1a1b;
    --text-secondary: #7c7c7c;
    --text-muted: #878a8c;
    --border-color: #e5e5e5;
    --accent: #0079d3;
    --accent-hover: #006cbd;
    --vote-active: #ff4500;
    --input-bg: #ffffff;
    --input-border: #ddd;
}

[data-theme="dark"] {
    --bg-primary: #1a1a1b;
    --bg-secondary: #272729;
    --bg-tertiary: #343536;
    --text-primary: #d7dadc;
    --text-secondary: #818384;
    --text-muted: #6b6c6e;
    --border-color: #343536;
    --accent: #4fbcff;
    --accent-hover: #7ac8ff;
    --vote-active: #ff6b35;
    --input-bg: #272729;
    --input-border: #3a3a3c;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    transition: background-color 0.2s, color 0.2s;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* Header */
header {
    margin-bottom: 24px;
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

header h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.session-code {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.host-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    transition: background-color 0.2s, border-color 0.2s;
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.2s;
}

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

.btn-primary {
    background-color: var(--accent);
    color: white;
}

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

.btn-danger {
    background-color: #ff4500;
    color: white;
}

.btn-danger:hover {
    background-color: #e03d00;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.875rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Session Info (host page) */
.code-display {
    text-align: center;
    margin: 20px 0;
}

.code-display .label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.code-display .code {
    font-size: 3rem;
    font-weight: bold;
    letter-spacing: 8px;
    color: var(--accent);
}

.qr-section {
    text-align: center;
    margin: 20px 0;
}

.qr-section img {
    max-width: 200px;
    border-radius: 8px;
}

.url-section {
    display: flex;
    gap: 10px;
    align-items: center;
    margin: 20px 0;
}

.url-section .label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    white-space: nowrap;
}

.url-section input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 0.875rem;
    background: var(--input-bg);
    color: var(--text-primary);
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 24px 0;
    color: var(--text-secondary);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.divider span {
    padding: 0 16px;
}

/* Forms */
input[type="text"],
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    background: var(--input-bg);
    color: var(--text-primary);
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
}

#join-form {
    display: flex;
    gap: 10px;
}

#join-form input {
    flex: 1;
    text-align: center;
    font-size: 1.25rem;
    letter-spacing: 4px;
}

/* Feedback Form */
.feedback-form form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feedback-form textarea {
    min-height: 80px;
}

/* Feedback List */
.feedback-list {
    margin-top: 16px;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Thread-style feedback items */
.feedback-thread {
    margin-bottom: 8px;
}

.feedback-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    position: relative;
}

.feedback-item.has-replies {
    padding-left: 24px;
}

.feedback-item.has-replies::before {
    content: '';
    position: absolute;
    left: 23px;
    top: 48px;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

/* Avatar */
.comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.comment-avatar.small {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
}

/* Content block */
.comment-content {
    flex: 1;
    min-width: 0;
}

.comment-meta {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 4px;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-sep {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.comment-time {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.comment-text {
    color: var(--text-primary);
    font-size: 0.9375rem;
    line-height: 1.4;
    margin-bottom: 8px;
    word-wrap: break-word;
}

/* Action bar */
.comment-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.comment-actions button {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s;
}

.comment-actions button:hover {
    color: var(--text-primary);
}

.comment-actions .vote-btn .arrow {
    font-size: 1rem;
}

.comment-actions .vote-btn.voted {
    color: var(--vote-active);
}

.comment-actions .vote-btn.voted .arrow {
    color: var(--vote-active);
}

.vote-count {
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Collapse toggle */
.collapse-btn {
    position: absolute;
    left: 15px;
    top: 24px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    flex-shrink: 0;
}

.collapse-btn:hover {
    background: var(--bg-tertiary);
}

.collapse-btn.collapsed::after {
    content: '+';
}

/* Nested comments (no line - can't reply to replies) */
.comments {
    margin-left: 44px;
    padding-left: 16px;
}

.comment-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
}

.comment-item .comment-content {
    flex: 1;
}

.comment-item.collapsed {
    display: none;
}

.comment-item .vote-section-inline {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-right: 8px;
}

/* Reply form */
.reply-form {
    margin-top: 12px;
    margin-left: 44px;
}

.reply-form textarea {
    min-height: 60px;
    margin-bottom: 8px;
}

/* Error Message */
.error-message {
    background-color: #fff2f0;
    border: 1px solid #ffccc7;
    color: #cf1322;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 16px;
}

[data-theme="dark"] .error-message {
    background-color: #3d1f1f;
    border-color: #5c2a2a;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 24px;
    max-width: 480px;
    width: 90%;
    border: 1px solid var(--border-color);
}

.modal-content h2 {
    margin-bottom: 16px;
}

.modal-content label {
    display: block;
    margin: 12px 0 4px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.modal-content input {
    margin-bottom: 8px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

#poll-options .poll-option {
    margin-bottom: 8px;
}

.poll-choice-type {
    display: flex;
    gap: 20px;
    margin: 12px 0;
}

.poll-choice-type .radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9375rem;
}

.poll-type-badge {
    font-size: 0.75rem;
    font-weight: normal;
    color: var(--text-muted);
    margin-left: 8px;
}

/* Polls */
.polls-section {
    margin-bottom: 24px;
}

.poll-card {
    margin-bottom: 16px;
}

.poll-question {
    font-size: 1.125rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.poll-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.poll-option-row {
    width: 100%;
}

.poll-option-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    text-align: left;
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: background-color 0.2s, border-color 0.2s;
}

.poll-option-btn:hover {
    background: var(--border-color);
}

.poll-option-btn.selected {
    border-color: var(--accent);
    background: rgba(0, 121, 211, 0.1);
}

.poll-option-label {
    flex: 0 0 120px;
    min-width: 0;
}

.poll-bar-container {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.poll-bar {
    display: block;
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.poll-count {
    flex: 0 0 32px;
    text-align: right;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 12px;
    }

    .header-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .code-display .code {
        font-size: 2rem;
        letter-spacing: 4px;
    }

    .url-section {
        flex-direction: column;
    }

    #join-form {
        flex-direction: column;
    }

    .comments {
        margin-left: 24px;
    }

    .reply-form {
        margin-left: 24px;
    }
}