:root {
    --bg-color: #020617;
    --card-bg: #0f172a;
    --card-border: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #22d3ee;
    --accent-hover: #06b6d4;
    --accent-glow: rgba(34, 211, 238, 0.1);
    --danger-color: #ef4444;
    --success-color: #10b981;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    height: 100vh;
    width: 100vw;
}

#app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.view {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.view.active {
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.container.centered {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

/* Notifications */
#notification-container {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 90%;
    max-width: 400px;
}

.notification {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    color: #fff;
    font-size: 0.875rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    animation: slideDown 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.notification.success { border-color: var(--success-color); }
.notification.error { border-color: var(--danger-color); }
.notification.info { border-color: var(--accent-color); }

@keyframes slideDown {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Hero Section */
.hero {
    margin-bottom: 3rem;
    animation: fadeIn 0.8s ease-out;
}

.shield-logo {
    display: inline-flex;
    padding: 1.5rem;
    background: var(--accent-glow);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 50%;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
    color: #fff;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Entropy Input Zone */
.entropy-input-zone {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.image-slots {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.slot {
    width: 80px;
    height: 80px;
    border-radius: 1rem;
    border: 2px dashed var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--card-bg);
    transition: all 0.2s;
    overflow: hidden;
}

.slot:hover {
    border-color: var(--accent-color);
    background: var(--accent-glow);
}

.slot img, .slot canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.main-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.home-shortcuts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.btn-shortcut {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.75rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* Buttons */
.btn-primary, .btn-accent, .btn-outline {
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s;
    border: none;
    width: 100%;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-accent {
    background: var(--card-bg);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.btn-accent:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--card-border);
    color: var(--text-secondary);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--card-bg);
    border-color: var(--text-secondary);
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

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

/* Loader */
.loader-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin-bottom: 2rem;
}

.loader-ring {
    position: absolute;
    inset: 0;
    border: 4px solid rgba(34, 211, 238, 0.1);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1.5s linear infinite;
}

.loader-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    animation: pulse 2s ease-in-out infinite;
}

.progress-bar {
    width: 100%;
    max-width: 300px;
    height: 6px;
    background: var(--card-border);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 1.5rem;
}

#progress-fill {
    height: 100%;
    background: var(--accent-color);
    width: 0%;
    transition: width 0.3s ease;
}

/* Dashboard Header */
.app-header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.timer-badge {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.logo-small {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: #fff;
}

.logo-small svg {
    color: var(--accent-color);
}

/* --- Profile Selector --- */
.profile-selector {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.selector-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-icon {
    background: rgba(255, 255, 255, 0.05);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
    cursor: pointer;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.profile-selector select {
    background: var(--bg-color);
    border: 1px solid var(--card-border);
    color: #fff;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    outline: none;
}

.seed-banner {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.seed-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.seed-info .label {
    font-size: 0.625rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.seed-info code {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-copy {
    background: var(--accent-glow);
    border: 1px solid rgba(34, 211, 238, 0.2);
    color: var(--accent-color);
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
}

/* Session Lock Overlay */
#session-lock-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.lock-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    max-width: 300px;
}

.lock-content svg {
    color: var(--accent-color);
}

/* --- Tab Navigation --- */
.tab-nav {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 0;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    position: relative;
    transition: color 0.2s;
}

.tab-btn.active {
    color: var(--accent-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
    border-radius: 1px;
}

/* Tab Content */
.tab-content {
    padding: 1.5rem;
    flex: 1;
}

.tab-pane {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
}

.tab-pane.active {
    display: flex;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
    margin: 0;
}

.hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.trust-message {
    font-size: 0.75rem;
    color: var(--accent-color);
    background: rgba(16, 185, 129, 0.1);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
    display: inline-block;
}

/* Identity Pane */
/* --- Identity & Fingerprint --- */
.fingerprint-container {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
    margin: 1rem 0;
    padding: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
}

.finger-block {
    aspect-ratio: 1;
    border-radius: 2px;
    transition: transform 0.2s;
}

.finger-block:hover {
    transform: scale(1.2);
    z-index: 1;
}

.shadow-identity {
    background: linear-gradient(135deg, var(--card-bg) 0%, #1e293b 100%);
    border-color: rgba(34, 211, 238, 0.2);
}

.identity-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#avatar-canvas {
    border-radius: 1rem;
    background: var(--bg-color);
    border: 2px solid var(--card-border);
}

.identity-text h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.identity-text p {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.input-stack {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* --- Password Strength --- */
.strength-meter {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin: 8px 0;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0;
    transition: width 0.3s, background 0.3s;
}

.strength-bar.weak { width: 33%; background: #ff4d4d; }
.strength-bar.medium { width: 66%; background: #ffcc00; }
.strength-bar.strong { width: 100%; background: var(--accent-color); }

.range-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

input[type="text"], input[type="password"], textarea, select {
    background: var(--bg-color);
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    color: #fff;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, textarea:focus {
    border-color: var(--accent-color);
}

textarea {
    resize: none;
    height: 120px;
}

.result-box {
    background: var(--bg-color);
    border: 1px solid var(--card-border);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.result-box code {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: 0.875rem;
    word-break: break-all;
}

.passphrase-display {
    background: var(--bg-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 1.125rem;
    color: var(--accent-color);
    text-align: center;
}

/* Trust Panel */
.trust-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--accent-glow);
    border-radius: 0.75rem;
    border: 1px solid rgba(34, 211, 238, 0.1);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: var(--accent-color);
    font-weight: 600;
}

/* Vault Pane */
.file-locker-zone {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 150px;
    overflow-y: auto;
    background: var(--bg-color);
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.file-item {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.file-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    word-break: break-all;
}

.success-msg {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.75rem;
}

.error-msg {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.75rem;
}

.locker-actions, .note-actions {
    display: flex;
    gap: 0.5rem;
}

/* Ghost Pane */
.stego-mode-toggle {
    display: flex;
    background: var(--bg-color);
    padding: 0.25rem;
    border-radius: 0.5rem;
}

.stego-config {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.capacity-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.mode-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.mode-btn.active {
    background: var(--card-bg);
    color: var(--accent-color);
}

.stego-preview {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-color);
    border-radius: 0.5rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

#stego-output-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Tools Pane */
.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

#qr-container {
    display: flex;
    justify-content: center;
    padding: 1rem;
    background: #fff;
    border-radius: 0.5rem;
}

.split-part {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.split-part label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.split-part code {
    background: var(--bg-color);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-color);
    word-break: break-all;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

#camera-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.camera-controls {
    position: absolute;
    bottom: 3rem;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.btn-shutter {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: #fff;
    border: 6px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
}

.btn-close {
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    cursor: pointer;
}

/* Footer */
.footer {
    margin-top: 2rem;
    color: #475569;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Password Strength */
.strength-meter {
    height: 4px;
    background: var(--card-border);
    border-radius: 2px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
}

.strength-bar.weak { background: var(--danger-color); width: 33%; }
.strength-bar.medium { background: #f59e0b; width: 66%; }
.strength-bar.strong { background: var(--success-color); width: 100%; }

/* Seed Fingerprint */
.fingerprint-container {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
    width: 100%;
    max-width: 200px;
    aspect-ratio: 1;
    background: var(--card-border);
    padding: 2px;
    border-radius: 0.5rem;
    margin: 0 auto;
}

.finger-block {
    aspect-ratio: 1;
    border-radius: 1px;
}

/* Stego Compare */
.stego-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.compare-box {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
}

.compare-box span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.compare-preview {
    aspect-ratio: 1;
    background: var(--bg-color);
    border-radius: 0.5rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.compare-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Secure Mode */
body.secure-mode .sensitive-data {
    filter: blur(8px);
    transition: filter 0.2s;
}

body.secure-mode .sensitive-data:hover {
    filter: blur(0);
}

/* Micro-interactions */
.btn-primary:active, .btn-accent:active, .btn-outline:active {
    transform: scale(0.98);
}

.tab-btn:active {
    transform: translateY(1px);
}

/* Tooltips & Hints */
.hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Mobile Optimization */
@media (max-width: 600px) {
    .view { padding: 1rem; }
    .card { padding: 1.2rem; }
    .btn-primary, .btn-accent, .btn-outline { padding: 14px 20px; }
    .tool-grid { grid-template-columns: 1fr; }
    .stego-compare { grid-template-columns: 1fr; }
    .tab-nav {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        gap: 1rem;
    }
}

/* --- Entropy Panel --- */
.entropy-panel {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.panel-header h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--accent-color);
}

.entropy-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.stat-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.75rem;
    border-radius: 0.5rem;
    text-align: center;
    border: 1px solid rgba(34, 211, 238, 0.1);
}

.stat-label {
    display: block;
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.badge {
    background: var(--accent-color);
    color: #000;
    padding: 0.2rem 0.6rem;
    border-radius: 0.25rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.6; }
    100% { opacity: 1; }
}

/* --- About & Legal --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.about-item h4 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.about-item p {
    font-size: 0.85rem;
    line-height: 1.5;
}

.legal-accordion details {
    border-bottom: 1px solid var(--card-border);
    padding: 0.75rem 0;
}

.legal-accordion summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
    outline: none;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.legal-accordion summary::after {
    content: '+';
    font-size: 1.2rem;
    color: var(--accent-color);
}

.legal-accordion details[open] summary::after {
    content: '−';
}

.legal-content {
    padding: 1rem 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.legal-content pre {
    background: #000;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    font-size: 0.75rem;
    color: var(--accent-color);
}

/* --- Responsive Adjustments --- */
@media (max-width: 640px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .entropy-stats {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* --- Labels and Hints --- */
.label-with-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hint-icon {
    width: 16px;
    height: 16px;
    background: var(--card-border);
    color: var(--text-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    cursor: help;
    transition: all 0.2s;
}

.hint-icon:hover {
    background: var(--accent-color);
    color: #000;
}

.hint-icon.mini {
    width: 14px;
    height: 14px;
    font-size: 9px;
}

.field-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.checksum-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Previews --- */
#export-preview-zone {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 0.75rem;
    border: 1px dashed var(--card-border);
}

#json-preview-container pre {
    background: #000;
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    overflow-x: auto;
    margin-bottom: 1rem;
    color: var(--accent-color);
    border: 1px solid var(--card-border);
}

/* --- Micro-interactions --- */
button {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

button:active {
    transform: scale(0.96);
}

.btn-primary:hover, .btn-accent:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 15px rgba(34, 211, 238, 0.3);
}

/* --- Animations --- */
.view {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.recording {
    background-color: #ef4444 !important;
    border-color: #ef4444 !important;
    color: white !important;
    animation: pulse-red 2s infinite;
}

/* --- Copy Feedback --- */
.btn-copy.success, .btn-copy-inline.success {
    background: #10b981 !important;
    color: #fff !important;
}

/* --- Privacy Banner --- */
.privacy-banner {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 600px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    z-index: 9999;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.privacy-banner.hidden {
    display: none;
}

@media (min-width: 640px) {
    .privacy-banner {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.privacy-content {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.privacy-content svg {
    color: var(--accent-color);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.privacy-content h4 {
    margin: 0 0 0.25rem 0;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.privacy-content p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

@keyframes slideUp {
    from { opacity: 0; transform: translate(-50%, 20px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* --- Validation Messages --- */
#import-validation-msg {
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

#import-validation-msg.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

#import-validation-msg.success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.95); }
}

/* Mobile Adjustments */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    .container { padding: 1rem; }
    .card { padding: 1.25rem; }
}

/* --- Footer --- */
.app-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--card-border);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-bottom: 1rem;
}

.footer-links {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.footer-links a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-credits p {
    margin: 0.25rem 0;
}

.powered-by {
    opacity: 0.7;
    font-size: 0.7rem;
    margin-top: 0.5rem !important;
}

/* --- Legal Modals --- */
.legal-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.legal-modal.active {
    display: flex;
}

.legal-content {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    text-align: left;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.legal-text {
    margin: 1.5rem 0;
    max-height: 60vh;
    overflow-y: auto;
    font-size: 0.85rem;
    color: var(--text-color);
    line-height: 1.6;
    padding-right: 1rem;
}

.legal-text p {
    margin-bottom: 1rem;
}