/* ===== CSS RESET & VARIABLES ===== */
:root {
    --bg: #0a0a0f;
    --bg-secondary: #0f1018;
    --surface: #151520;
    --surface2: #1a1a2e;
    --surface3: #1e2035;
    --accent: #6c5ce7;
    --accent-bright: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --accent2: #00b894;
    --accent2-glow: rgba(0, 184, 148, 0.3);
    --red: #e94560;
    --orange: #fd9644;
    --yellow: #fed330;
    --text: #e8e8f0;
    --text-dim: #8888aa;
    --text-dimmer: #555577;
    --border: #2a2a40;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.5);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== LOGIN SCREEN ===== */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: radial-gradient(ellipse at center, #151530 0%, #0a0a0f 70%);
}

.login-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 48px 40px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 80px var(--accent-glow);
    max-width: 420px;
    width: 90%;
}

.login-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 8px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.login-card h1 {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-bright), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-subtitle {
    color: var(--text-dim);
    font-size: 0.85rem;
    text-align: center;
}

#login-screen input {
    padding: 14px 20px;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    width: 100%;
    text-align: center;
    transition: var(--transition);
    font-family: inherit;
}

#login-screen input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.login-btn {
    padding: 14px 40px;
    border-radius: var(--radius);
    border: none;
    background: linear-gradient(135deg, var(--accent), #5a4bd1);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    width: 100%;
    transition: var(--transition);
    font-family: inherit;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

#login-error {
    color: var(--red);
    font-size: 0.85rem;
    display: none;
}

/* ===== MAIN APP ===== */
#app { display: none; }

/* HEADER */
.header {
    background: var(--surface);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-left h1 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-bright);
}

.header-left h1 i { margin-right: 8px; }

.header-tagline {
    font-size: 0.75rem;
    color: var(--text-dim);
    display: block;
    margin-top: 2px;
}

.header-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* BUTTONS */
.btn {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--text-dim);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.8rem;
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.btn:hover {
    border-color: var(--accent);
    color: var(--text);
    background: var(--surface3);
}

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

.btn-glow {
    background: linear-gradient(135deg, var(--accent), #5a4bd1);
    border-color: var(--accent);
    color: white;
}

.btn-glow:hover {
    box-shadow: 0 4px 20px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-danger {
    border-color: var(--red);
    color: var(--red);
}

.btn-danger:hover {
    background: var(--red);
    color: white;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.75rem;
}

/* LAYOUT */
.main-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    min-height: calc(100vh - 64px);
}

@media (max-width: 900px) {
    .main-grid { grid-template-columns: 1fr; }
    .left-panel { max-height: none !important; }
}

/* LEFT PANEL */
.left-panel {
    background: var(--surface);
    padding: 20px;
    overflow-y: auto;
    max-height: calc(100vh - 64px);
    border-right: 1px solid var(--border);
}

.panel-section { margin-bottom: 24px; }

.panel-section h3 {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.panel-section h3 i { color: var(--accent); font-size: 0.7rem; }

/* Category Cards */
.category-card {
    padding: 14px 16px;
    background: var(--bg);
    border-radius: var(--radius);
    margin-bottom: 8px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    opacity: 0;
    transition: var(--transition);
}

.category-card:hover {
    border-color: var(--border);
    transform: translateX(4px);
}

.category-card:hover::before { opacity: 1; }

.category-card.selected {
    border-color: var(--accent);
    background: rgba(108, 92, 231, 0.08);
}

.category-card.selected::before { opacity: 1; }

.card-title {
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-emoji { font-size: 1.2rem; }

.card-desc {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 4px;
    line-height: 1.4;
}

.card-count {
    font-size: 0.7rem;
    color: var(--accent-bright);
    margin-top: 6px;
    font-weight: 500;
}

/* KEYWORD CHIPS */
.keyword-area {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.keyword-label {
    width: 100%;
    font-size: 0.7rem;
    color: var(--text-dimmer);
    margin-top: 10px;
    margin-bottom: 2px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.keyword-chip {
    padding: 7px 14px;
    background: var(--bg);
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: var(--transition);
    white-space: nowrap;
    color: var(--text);
}

.keyword-chip:hover {
    border-color: var(--accent);
    background: rgba(108, 92, 231, 0.1);
    transform: translateY(-1px);
}

.keyword-chip.selected {
    border-color: var(--accent);
    background: var(--accent);
    color: white;
}

.keyword-chip.broad {
    background: rgba(0, 184, 148, 0.08);
    border-color: rgba(0, 184, 148, 0.3);
    color: var(--accent2);
}

.keyword-chip.broad:hover {
    border-color: var(--accent2);
    background: rgba(0, 184, 148, 0.15);
}

.keyword-chip.broad.selected {
    background: var(--accent2);
    border-color: var(--accent2);
    color: white;
}

/* Custom Keyword */
.custom-keyword {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.custom-keyword input {
    flex: 1;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 0.85rem;
    font-family: inherit;
    transition: var(--transition);
}

.custom-keyword input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Explore Banner */
.explore-banner {
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.15), rgba(0, 184, 148, 0.1));
    border: 1px solid rgba(108, 92, 231, 0.2);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    text-align: center;
}

.banner-icon { font-size: 2rem; margin-bottom: 8px; }

.explore-banner h3 {
    font-size: 0.95rem;
    margin-bottom: 8px;
    color: var(--accent-bright);
}

.explore-banner p {
    color: var(--text-dim);
    font-size: 0.8rem;
    margin-bottom: 12px;
}

/* ===== RIGHT PANEL ===== */
.right-panel {
    padding: 24px;
    overflow-y: auto;
    max-height: calc(100vh - 64px);
    background: var(--bg-secondary);
}

.breadcrumb {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb i { color: var(--text-dimmer); }
.breadcrumb span { color: var(--accent-bright); }
.breadcrumb .sep { color: var(--text-dimmer); margin: 0 4px; }

/* Results Header */
.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.results-title-area {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.results-title-area h2 {
    font-size: 1.15rem;
    font-weight: 700;
}

.current-keyword-badge {
    background: var(--accent);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.sort-buttons { display: flex; gap: 6px; }

/* Content Type Tabs */
.content-type-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.type-tab {
    padding: 7px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    background: var(--surface);
    color: var(--text-dim);
    cursor: pointer;
    border: 1px solid var(--border);
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.type-tab:hover { color: var(--text); border-color: var(--accent); }
.type-tab.active { background: var(--accent); color: white; border-color: var(--accent); }

/* Search Variation Tabs */
.search-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.search-tab {
    padding: 5px 12px;
    border-radius: 16px;
    font-size: 0.75rem;
    background: var(--surface);
    color: var(--text-dim);
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
}

.search-tab:hover { color: var(--text); border-color: var(--border); }
.search-tab.active { background: var(--accent); color: white; }

/* ===== WELCOME SCREEN ===== */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
    gap: 16px;
}

.welcome-icon {
    font-size: 4rem;
    color: var(--accent);
    opacity: 0.5;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.welcome-screen h3 {
    font-size: 1.3rem;
    color: var(--text);
}

.welcome-screen > p {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.6;
}

.welcome-tips {
    display: flex;
    gap: 16px;
    margin-top: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.tip {
    background: var(--surface);
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 0.8rem;
    color: var(--text-dim);
    border: 1px solid var(--border);
    max-width: 200px;
    text-align: left;
}

.tip i { color: var(--accent); margin-right: 4px; }
.tip strong { color: var(--text); }

/* ===== KEYWORD RESULT SCREEN ===== */
.keyword-result {
    max-width: 800px;
    margin: 0 auto;
}

.result-keyword-display {
    text-align: center;
    padding: 32px 20px;
    background: linear-gradient(135deg, var(--surface), var(--surface2));
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 24px;
}

.result-emoji { font-size: 2.5rem; display: block; margin-bottom: 12px; }

.result-keyword-display h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    word-break: break-all;
}

.result-category-path {
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 28px;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.action-btn:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.action-btn .action-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.action-btn .action-info { flex: 1; }

.action-btn .action-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.action-btn .action-desc {
    font-size: 0.7rem;
    color: var(--text-dim);
}

.icon-youtube { background: rgba(255, 0, 0, 0.15); color: #ff4444; }
.icon-shorts { background: rgba(255, 107, 107, 0.15); color: #ff6b6b; }
.icon-hashtag { background: rgba(108, 92, 231, 0.15); color: var(--accent-bright); }
.icon-long { background: rgba(0, 184, 148, 0.15); color: var(--accent2); }
.icon-documentary { background: rgba(253, 150, 68, 0.15); color: var(--orange); }
.icon-education { background: rgba(254, 211, 48, 0.15); color: var(--yellow); }
.icon-midform { background: rgba(116, 185, 255, 0.15); color: #74b9ff; }

/* Variation Section */
.variation-section {
    margin-bottom: 28px;
}

.variation-section h4 {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.variation-section h4 i { color: var(--accent); }

.variation-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.variation-chip {
    padding: 7px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.variation-chip:hover {
    border-color: var(--accent);
    background: rgba(108, 92, 231, 0.1);
    transform: translateY(-1px);
}

.variation-chip i { font-size: 0.65rem; color: var(--text-dimmer); }

/* Tips Section */
.tips-section {
    margin-bottom: 20px;
}

.tips-section h4 {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tips-section h4 i { color: var(--accent2); }

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
}

.tip-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    font-size: 0.8rem;
    color: var(--text-dim);
    line-height: 1.5;
}

.tip-card strong { color: var(--accent-bright); }
.tip-card i { color: var(--accent2); margin-right: 4px; }

/* ===== EDIT OVERLAY ===== */
.edit-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.92);
    z-index: 900;
    padding: 30px;
    overflow-y: auto;
    backdrop-filter: blur(5px);
}

.edit-overlay.show { display: flex; align-items: flex-start; justify-content: center; }

.edit-area {
    max-width: 850px;
    width: 100%;
    background: var(--surface);
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-top: 20px;
}

.edit-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.edit-header h2 {
    font-size: 1.1rem;
    color: var(--accent-bright);
    display: flex;
    align-items: center;
    gap: 8px;
}

.edit-close-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.edit-close-btn:hover { color: var(--red); background: rgba(233, 69, 96, 0.1); }

.edit-desc {
    color: var(--text-dim);
    font-size: 0.8rem;
    margin-bottom: 16px;
}

.edit-area textarea {
    width: 100%;
    min-height: 500px;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    resize: vertical;
    transition: var(--transition);
}

.edit-area textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.edit-buttons {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

/* ===== TRANSLATE SECTION ===== */
.translate-section {
    margin-bottom: 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.translate-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    flex-wrap: wrap;
    gap: 8px;
}

.translate-header h4 {
    font-size: 0.9rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
}

.translate-header h4 i { color: var(--accent-bright); }

.translate-loading {
    text-align: center;
    padding: 24px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.translate-loading i {
    font-size: 1.5rem;
    color: var(--accent);
    display: block;
    margin-bottom: 10px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.translate-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}

.translate-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.translate-row:hover {
    border-color: var(--accent);
}

.translate-flag {
    font-size: 1.3rem;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.translate-lang {
    font-size: 0.7rem;
    color: var(--text-dimmer);
    width: 52px;
    flex-shrink: 0;
    font-weight: 600;
    text-transform: uppercase;
}

.translate-text {
    flex: 1;
    font-size: 0.85rem;
    color: var(--text);
    word-break: break-word;
}

.translate-search-btn {
    padding: 5px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--text-dim);
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.translate-search-btn:hover {
    border-color: var(--accent);
    color: var(--text);
    background: rgba(108, 92, 231, 0.15);
}

.translate-error {
    text-align: center;
    padding: 16px;
    color: var(--red);
    font-size: 0.85rem;
}

.translate-error i { margin-right: 6px; }

.translate-no-key {
    text-align: center;
    padding: 20px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.translate-no-key button {
    margin-top: 10px;
}

/* ===== API SETTINGS ===== */
.api-settings-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 8px;
}

.api-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.api-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
}

.api-field input {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    transition: var(--transition);
}

.api-field input:focus {
    outline: none;
    border-color: var(--accent);
}

.api-field small {
    font-size: 0.7rem;
    color: var(--text-dimmer);
}

.api-field small a {
    color: var(--accent-bright);
    text-decoration: none;
}

.api-field small a:hover { text-decoration: underline; }

.api-provider-btns {
    display: flex;
    gap: 8px;
}

.api-provider-btn {
    flex: 1;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    background: var(--bg);
    color: var(--text-dim);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.api-provider-btn:hover {
    border-color: var(--accent);
    color: var(--text);
}

.api-provider-btn.active {
    border-color: var(--accent);
    background: rgba(108, 92, 231, 0.15);
    color: var(--accent-bright);
}

.api-status {
    font-size: 0.8rem;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    display: none;
}

.api-status.success {
    display: block;
    background: rgba(0, 184, 148, 0.1);
    color: var(--accent2);
    border: 1px solid rgba(0, 184, 148, 0.3);
}

.api-status.error {
    display: block;
    background: rgba(233, 69, 96, 0.1);
    color: var(--red);
    border: 1px solid rgba(233, 69, 96, 0.3);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .header {
        padding: 12px 16px;
    }
    
    .header-left h1 { font-size: 0.95rem; }
    
    .header-buttons {
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
    }
    
    .right-panel { padding: 16px; }
    
    .result-keyword-display { padding: 20px 16px; }
    .result-keyword-display h2 { font-size: 1.2rem; }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .welcome-tips { flex-direction: column; align-items: center; }
}