body[data-theme="vercel-dark"] {
    --bg-main: #000000;
    --bg-sidebar: #0a0a0a;
    --bg-card: #0a0a0a;
    --text-main: #ffffff;
    --text-muted: #888888;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-hover: rgba(255, 255, 255, 0.06);
    --accent-color: #ffffff;
    --grid-opacity: 0.01;
}

body[data-theme="cyber-cyan"] {
    --bg-main: #020617;
    --bg-sidebar: #0f172a;
    --bg-card: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(6, 182, 212, 0.2);
    --glass-bg: rgba(6, 182, 212, 0.05);
    --glass-hover: rgba(6, 182, 212, 0.12);
    --accent-color: #06b6d4;
    --grid-opacity: 0.02;
}

body[data-theme="quartz-pink"] {
    --bg-main: #0f0514;
    --bg-sidebar: #1a0b22;
    --bg-card: #251230;
    --text-main: #fae8ff;
    --text-muted: #d8b4fe;
    --border-color: rgba(232, 121, 249, 0.2);
    --glass-bg: rgba(232, 121, 249, 0.05);
    --glass-hover: rgba(232, 121, 249, 0.12);
    --accent-color: #e879f9;
    --grid-opacity: 0.02;
}

body[data-theme="light-mode"] {
    --bg-main: #ffffff;
    --bg-sidebar: #fafafa;
    --bg-card: #ffffff;
    --text-main: #000000;
    --text-muted: #666666;
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(0, 0, 0, 0.02);
    --glass-hover: rgba(0, 0, 0, 0.05);
    --accent-color: #000000;
    --grid-opacity: 0.03;
}

/* Thème "Rose Néon — Style V3" : reprend l'identité visuelle exacte de l'ancien Cogitron V3
   (fond bleu nuit quasi noir, lueur cyan en accent principal, rose en accent secondaire/alerte). */
body[data-theme="cogitron-v3"] {
    --bg-main: #030407;
    --bg-sidebar: #0a0b16;
    --bg-card: #0f111a;
    --text-main: #ffffff;
    --text-muted: #8a99ad;
    --border-color: #1e2633;
    --glass-bg: rgba(0, 212, 255, 0.04);
    --glass-hover: rgba(0, 212, 255, 0.1);
    --accent-color: #00d4ff;
    --pink-accent: #ff007f;
    --grid-opacity: 0.02;
}

:root {
    --pink-accent: #ff007f;
    --error-color: #ff3333;
    --radius-lg: 24px;
    --radius-md: 12px;
    --radius-sm: 8px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    background-color: var(--bg-main);
    color: var(--text-main);
    transition: background-color 0.3s, color 0.3s;
}

.vercel-grid {
    position: fixed;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, var(--grid-opacity)) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, var(--grid-opacity)) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 1;
}

.sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    z-index: 10;
}

.sidebar-top {
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    height: calc(100% - 76px);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-left: 4px;
}

.brand-logo {
    width: 22px;
    height: 22px;
    object-fit: contain;
}

.brand-name {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-main);
}

.btn-full {
    width: 100%;
    text-align: center;
    justify-content: center;
}

.sidebar-scroll {
    flex: 1;
    overflow-y: auto;
    margin-top: 12px;
}

.history-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.chat-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--text-muted);
    transition: all 0.15s;
    border: 1px solid transparent;
}

.chat-item:hover, .chat-item.active {
    background: var(--glass-bg);
    color: var(--text-main);
    border-color: var(--border-color);
}

.chat-item.active {
    border-color: var(--border-color);
}

.chat-item-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.delete-btn {
    opacity: 0;
    color: var(--pink-accent);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: opacity 0.15s, background 0.15s, transform 0.15s;
    background: none;
    border: none;
}

.chat-item:hover .delete-btn {
    opacity: 1;
}

.delete-btn:hover {
    background: rgba(255, 0, 127, 0.12);
    transform: scale(1.1);
}

/* Sur mobile il n'y a pas de survol : le bouton reste visible en permanence, en discret. */
@media (max-width: 768px) {
    .delete-btn {
        opacity: 0.6;
    }
}

.sidebar-footer {
    padding: 14px 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-sidebar);
}

.user-profile-box {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    flex: 1;
    min-width: 0;
    padding: 6px 10px;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}

.user-profile-box:hover {
    background: var(--glass-hover);
    border-color: var(--border-color);
}

.user-avatar-display {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.btn-logout-v4 {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.btn-logout-v4:hover {
    color: var(--error-color);
    background: var(--glass-bg);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    z-index: 5;
    background: var(--bg-main);
}

.top-bar-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-sidebar);
}

.chat-messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

#announcement-zone {
    padding: 16px 24px 0;
    flex-shrink: 0;
}

#announcement-zone:empty {
    padding: 0;
}

.welcome-container {
    margin: auto;
    text-align: center;
    max-width: 500px;
}

.welcome-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
    background: linear-gradient(180deg, var(--text-main) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.message {
    display: flex;
    gap: 16px;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    line-height: 1.6;
}

/* Convention standard des messageries : l'élève à droite, Cogitron à gauche. */
.message-user {
    flex-direction: row-reverse;
}

.message-user .message-content-wrapper {
    align-items: flex-end;
}

.message-user .message-text {
    background: var(--accent-color);
    color: var(--bg-main);
    border-color: transparent;
}

body[data-theme="vercel-dark"] .message-user .message-text,
body[data-theme="light-mode"] .message-user .message-text {
    background: var(--glass-hover);
    color: var(--text-main);
    border-color: var(--border-color);
}

.message-user .message-sender {
    text-align: right;
}

.message-user .copy-msg-btn {
    align-self: flex-end;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.95rem;
}

.message-content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.message-sender {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.message-text {
    font-size: 0.95rem;
    color: var(--text-main);
    word-break: break-word;
    background: var(--glass-bg);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.cogitron-generated-image {
    display: block;
    max-width: 100%;
    width: 320px;
    margin-top: 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.copy-msg-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 6px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: opacity 0.15s, background 0.15s, color 0.15s;
}

.message:hover .copy-msg-btn {
    opacity: 0.7;
}

.copy-msg-btn:hover {
    opacity: 1;
    background: var(--glass-hover);
    color: var(--text-main);
}

@media (max-width: 768px) {
    .copy-msg-btn {
        opacity: 0.5;
    }
}

.attached-file-info {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    margin-top: 8px;
    max-width: max-content;
}

.input-area-wrapper {
    padding: 24px;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.preview-container {
    display: flex;
}

.preview-badge {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-main);
}

.btn-remove-preview {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    padding-left: 4px;
}

.chat-form-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.chat-form-box:focus-within {
    border-color: var(--text-muted);
}

#chat-input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-main);
    resize: none;
    font-size: 0.95rem;
    flex: 1;
    line-height: 1.5;
}

.form-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.control-buttons-left {
    display: flex;
    gap: 4px;
}

.input-action-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.input-action-btn:hover {
    color: var(--text-main);
    background: var(--glass-bg);
}

.input-action-btn.recording {
    color: var(--pink-accent);
    animation: pulseMic 1.2s infinite;
}

@keyframes pulseMic {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.btn-vercel {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    transition: all 0.15s;
}

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

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: var(--glass-bg);
}

.status-bar-v4 {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-left: 4px;
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    z-index: 10;
}

.settings-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.settings-subtitle {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 24px;
}

.settings-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.settings-select, .settings-input {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    outline: none;
    font-size: 0.9rem;
}

.settings-input:focus {
    border-color: var(--text-muted);
}

.cogitron-thinking-loader {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-top: 6px;
}

.thinking-dot {
    width: 6px;
    height: 6px;
    background-color: var(--text-main);
    border-radius: 50%;
    animation: thinkingBounce 1.2s infinite ease-in-out both;
}

.thinking-dot:nth-child(1) { animation-delay: -0.32s; }
.thinking-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes thinkingBounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

.system-announcement-banner {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--glass-bg);
    border: 1px solid var(--accent-color);
    border-left: 4px solid var(--accent-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    max-width: 800px;
    width: 100%;
    margin: 0 auto 8px auto;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-main);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    animation: announcementIn 0.25s ease-out;
}

@keyframes announcementIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

.announcement-main {
    display: flex;
    align-items: baseline;
    gap: 8px;
    flex-wrap: wrap;
}

.announcement-tag {
    background: var(--accent-color);
    color: var(--bg-main);
    font-family: 'Rajdhani', sans-serif;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.announcement-close-btn {
    align-self: flex-end;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: 'Geist', sans-serif;
    font-weight: 600;
    font-size: 0.75rem;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.15s;
}

.announcement-close-btn:hover {
    background: var(--accent-color);
    color: var(--bg-main);
    border-color: var(--accent-color);
}

.quick-box {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-width: 500px;
    margin: 0 auto 4px auto;
    width: 100%;
}

.quick-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.85rem;
    text-align: left;
    transition: all 0.15s;
}

.quick-btn:hover {
    background: var(--glass-hover);
    border-color: var(--text-muted);
}

.btn-mobile-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 4px 8px;
}

.sidebar-close-mobile {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.6rem;
    cursor: pointer;
    padding: 0;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 15;
}

.sidebar-overlay.active {
    display: block;
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: 280px;
        transition: transform 0.25s ease;
        z-index: 20;
    }
    .sidebar.closed {
        transform: translateX(-100%);
    }
    .sidebar-close-mobile {
        display: block;
    }
    .btn-mobile-menu {
        display: block;
    }
    .quick-box {
        grid-template-columns: 1fr;
    }
    .message {
        max-width: 100%;
    }
    .chat-messages-container, .input-area-wrapper {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* ==================== PAGE PARAMÈTRES : slide bar de navigation ==================== */

.settings-body {
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    overflow: hidden;
    padding: 0;
}

.settings-nav {
    width: 260px;
    flex-shrink: 0;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
    z-index: 20;
    transition: transform 0.25s ease, margin-left 0.25s ease;
}

.settings-nav.closed {
    margin-left: -260px;
}

.settings-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.settings-nav-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.settings-nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
}

.settings-nav-close:hover {
    color: var(--text-main);
    background: var(--glass-bg);
}

.settings-nav-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.settings-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 10px 14px;
    border-radius: var(--radius-lg);
    font-size: 0.92rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s;
}

.settings-nav-item:hover {
    background: var(--glass-bg);
    color: var(--text-main);
}

.settings-nav-item.active {
    background: var(--glass-hover);
    color: var(--text-main);
    font-weight: 700;
}

.settings-nav-back {
    color: var(--text-muted);
    font-size: 0.82rem;
    text-decoration: none;
    padding: 10px 14px;
}

.settings-nav-back:hover {
    color: var(--text-main);
}

.settings-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100vh;
    position: relative;
    z-index: 5;
}

.settings-topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-sidebar);
    flex-shrink: 0;
}

.settings-nav-toggle {
    display: flex !important;
    border-radius: var(--radius-sm);
}

.settings-nav-toggle:hover {
    background: var(--glass-bg);
}

.settings-topbar-title {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin-right: auto;
}

.settings-save-indicator {
    font-size: 0.78rem;
    color: #34d399;
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.2s;
}

.settings-save-indicator.visible {
    opacity: 1;
}

.settings-scroll {
    flex: 1;
    overflow-y: auto;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

.settings-panel {
    display: none;
}

.settings-panel.active {
    display: block;
}

@media (max-width: 900px) {
    .settings-nav {
        position: fixed;
        inset: 0 auto 0 0;
        width: 280px;
        margin-left: 0;
        transform: translateX(0);
        transition: transform 0.25s ease;
    }
    .settings-nav.closed {
        margin-left: 0;
        transform: translateX(-100%);
    }
    .settings-scroll {
        padding: 24px 16px;
    }
    .settings-card {
        padding: 24px 20px;
    }
}

/* ==================== Easter eggs Minecraft ==================== */

.mc-achievement-toast {
    position: fixed;
    bottom: 24px;
    left: -320px;
    width: 300px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #3a3a3a, #1c1c1c);
    border: 2px solid #555;
    box-shadow: 0 0 0 2px #000, 4px 4px 0 rgba(0,0,0,0.4);
    padding: 10px 14px;
    z-index: 99999;
    transition: left 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    font-family: 'Geist', sans-serif;
}

.mc-achievement-toast.visible {
    left: 24px;
}

.mc-achievement-icon {
    font-size: 1.8rem;
    background: #FFC800;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #000;
    flex-shrink: 0;
}

.mc-achievement-title {
    color: #FFFF55;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mc-achievement-subtitle {
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
}

.screen-shake {
    animation: mcScreenShake 0.5s;
}

@keyframes mcScreenShake {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-6px, 4px); }
    20% { transform: translate(6px, -4px); }
    30% { transform: translate(-6px, -4px); }
    40% { transform: translate(6px, 4px); }
    50% { transform: translate(-4px, 2px); }
    60% { transform: translate(4px, -2px); }
    70% { transform: translate(-3px, 3px); }
    80% { transform: translate(3px, -3px); }
    90% { transform: translate(-2px, 1px); }
}