:root {
    --bg-main: #0d1117;
    --bg-card: #161b22;
    --bg-input: #0a0d12;
    --border-color: #30363d;
    --border-focus: #58a6ff;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-blue: #2f81f7;
    --accent-blue-hover: #388bfd;
    --accent-green: #238636;
    --accent-green-hover: #2ea043;
    --accent-purple: #8957e5;
    --accent-gold: #d29922;
    --danger-red: #da3633;
    --danger-red-hover: #f85149;
    --code-font: 'Fira Code', 'Cascadia Code', Consolas, Monaco, monospace;
    --ui-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.7);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--ui-font);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

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

.logo-icon {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 16px rgba(47, 129, 247, 0.3);
}

.brand-text h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: inline-block;
}

.brand-text .badge {
    background: rgba(47, 129, 247, 0.15);
    color: var(--accent-blue);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid rgba(47, 129, 247, 0.3);
    margin-left: 6px;
    vertical-align: middle;
}

/* Navigation tabs */
.nav-tabs {
    display: flex;
    gap: 8px;
    background: var(--bg-card);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 0.88rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent-blue);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(47, 129, 247, 0.4);
}

/* Auth Profile Header Widget */
.auth-widget {
    display: flex;
    align-items: center;
}

.user-profile-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
}

.user-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn-sm {
    padding: 4px 8px !important;
    font-size: 0.8rem !important;
}

/* Views & Panels */
.main-content {
    flex: 1;
}

.view-panel {
    display: none;
    animation: fadeIn 0.25s ease-out;
}

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

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

/* Editor Card */
.editor-card, .lookup-card, .display-card, .history-card, .decrypt-card, .access-denied-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.editor-header {
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.title-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--ui-font);
    font-size: 0.95rem;
    font-weight: 600;
    min-width: 250px;
}

.title-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hint-key {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.hint-key kbd {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1px 5px;
    font-size: 0.72rem;
    font-family: var(--code-font);
}

.editor-wrapper {
    display: flex;
    min-height: 350px;
    background: var(--bg-input);
    position: relative;
}

.line-numbers {
    width: 48px;
    padding: 14px 10px;
    text-align: right;
    font-family: var(--code-font);
    font-size: 0.88rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.2);
    user-select: none;
    line-height: 1.6;
    border-right: 1px solid var(--border-color);
    white-space: pre;
}

.code-textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: var(--code-font);
    font-size: 0.88rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 350px;
    white-space: pre;
    tab-size: 4;
}

.code-textarea::placeholder {
    color: var(--text-muted);
}

/* Security & Privacy Options Bar */
.options-bar {
    padding: 12px 18px;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.option-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.option-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.toggle-group {
    display: flex;
    gap: 6px;
}

.radio-label {
    cursor: pointer;
}

.radio-label input {
    display: none;
}

.radio-label .pill {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.15s ease;
}

.radio-label input:checked + .pill {
    background: rgba(47, 129, 247, 0.18);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    font-weight: 600;
}

.radio-label.disabled .pill {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.84rem;
    font-weight: 500;
    color: var(--text-primary);
    user-select: none;
}

.checkbox-label input {
    accent-color: var(--accent-blue);
    width: 15px;
    height: 15px;
}

.passphrase-box {
    margin-left: 8px;
}

.passphrase-input, .decrypt-input {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    color: var(--text-primary);
    font-family: var(--code-font);
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s;
}

.passphrase-input:focus, .decrypt-input:focus {
    border-color: var(--border-focus);
}

.editor-footer {
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.stats-counter {
    font-size: 0.82rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.dot-separator {
    color: var(--text-muted);
}

/* Buttons */
.btn-primary {
    background: var(--accent-green);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 9px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--accent-green-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(35, 134, 54, 0.4);
}

.btn-secondary {
    background: #21262d;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 14px;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    transition: all 0.15s ease;
}

.btn-secondary:hover {
    background: #30363d;
    border-color: #8b949e;
}

.btn-accent {
    background: var(--accent-blue);
    color: white;
    border: none;
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s ease;
}

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

.btn-danger {
    background: transparent;
    color: var(--danger-red);
    border: 1px solid rgba(218, 54, 51, 0.4);
    padding: 4px 8px;
    font-size: 0.78rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
}

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

.btn-ghost {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px 10px;
    font-size: 0.82rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Result Card */
.result-card {
    margin-top: 20px;
    background: var(--bg-card);
    border: 1px solid rgba(35, 134, 54, 0.4);
    border-radius: var(--radius-lg);
    padding: 20px;
    animation: fadeIn 0.3s ease-out;
}

.success-banner {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.success-icon {
    background: rgba(35, 134, 54, 0.2);
    color: #3fb950;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-banner h3 {
    font-size: 1.1rem;
    color: #3fb950;
}

.success-banner p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.key-display-box {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.key-badge {
    font-family: var(--code-font);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-blue);
    background: rgba(47, 129, 247, 0.12);
    padding: 4px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(47, 129, 247, 0.3);
    margin-left: 8px;
    letter-spacing: 1px;
}

.key-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Lookup view */
.lookup-card {
    padding: 32px 28px;
    text-align: center;
    max-width: 600px;
    margin: 0 auto 24px auto;
}

.lookup-card h2 {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.search-input-wrapper {
    display: flex;
    gap: 8px;
}

.search-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-family: var(--code-font);
    font-size: 1rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.2);
}

/* Decrypt & Access Denied Cards */
.decrypt-card {
    padding: 24px;
    margin-top: 20px;
    border-color: rgba(210, 153, 34, 0.4);
    background: rgba(210, 153, 34, 0.05);
}

.decrypt-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.lock-icon {
    background: rgba(210, 153, 34, 0.2);
    color: var(--accent-gold);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.decrypt-form {
    display: flex;
    gap: 10px;
    max-width: 500px;
}

.decrypt-input {
    flex: 1;
    padding: 10px 14px;
    font-size: 0.95rem;
}

.access-denied-card {
    padding: 36px 24px;
    text-align: center;
    margin-top: 20px;
    border-color: rgba(218, 54, 51, 0.4);
    background: rgba(218, 54, 51, 0.05);
}

.denied-icon {
    color: var(--danger-red);
    margin-bottom: 12px;
}

/* Display Card */
.display-card {
    margin-top: 24px;
}

.display-header {
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.meta-details {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.key-tag {
    font-family: var(--code-font);
    font-weight: 600;
    color: var(--accent-blue);
    background: rgba(47, 129, 247, 0.15);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.meta-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.badge-pill {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
}

.badge-public {
    background: rgba(35, 134, 54, 0.2);
    color: #3fb950;
    border: 1px solid rgba(35, 134, 54, 0.4);
}

.badge-private {
    background: rgba(137, 87, 229, 0.2);
    color: var(--accent-purple);
    border: 1px solid rgba(137, 87, 229, 0.4);
}

.badge-encrypted {
    background: rgba(210, 153, 34, 0.2);
    color: var(--accent-gold);
    border: 1px solid rgba(210, 153, 34, 0.4);
}

.stat-pill {
    font-size: 0.78rem;
    color: var(--text-secondary);
    background: #21262d;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
}

.display-actions {
    display: flex;
    gap: 8px;
}

.viewer-wrapper {
    display: flex;
    background: var(--bg-input);
    min-height: 250px;
    max-height: 600px;
    overflow-y: auto;
}

.code-viewer {
    flex: 1;
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: var(--code-font);
    font-size: 0.88rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre;
}

/* My Pastes Dashboard */
.history-card {
    padding: 24px;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.auth-prompt-card {
    text-align: center;
    padding: 48px 24px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    margin-top: 12px;
}

.auth-prompt-card svg {
    color: var(--text-muted);
    margin-bottom: 12px;
}

.auth-prompt-card h3 {
    font-size: 1.15rem;
    margin-bottom: 6px;
}

.auth-prompt-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.user-pastes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.user-paste-card {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.user-paste-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.card-title-key {
    display: flex;
    flex-direction: column;
}

.card-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.card-key {
    font-family: var(--code-font);
    font-size: 0.8rem;
    color: var(--accent-blue);
}

.card-badges {
    display: flex;
    gap: 4px;
}

.card-snippet {
    font-family: var(--code-font);
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    margin: 10px 0;
    background: rgba(0, 0, 0, 0.2);
    padding: 8px;
    border-radius: var(--radius-sm);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.card-actions {
    display: flex;
    gap: 6px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    padding: 28px 24px;
    position: relative;
    animation: scaleIn 0.2s ease-out;
}

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 18px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.modal-tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    padding: 10px 0;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-tab-btn.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.84rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.modal-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
}

.modal-input:focus {
    border-color: var(--border-focus);
}

.auth-error {
    background: rgba(218, 54, 51, 0.15);
    border: 1px solid var(--danger-red);
    color: #ff7b72;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    margin-bottom: 16px;
}

/* Toasts */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: #1f242c;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.2s ease-out;
}

.toast.toast-success { border-color: var(--accent-green); }
.toast.toast-error { border-color: var(--danger-red); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Footer */
.app-footer {
    text-align: center;
    padding-top: 32px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 700px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-tabs {
        width: 100%;
        justify-content: space-between;
    }
    .tab-btn {
        flex: 1;
        justify-content: center;
        padding: 8px 6px;
        font-size: 0.8rem;
    }
    .key-display-box {
        flex-direction: column;
        align-items: flex-start;
    }
    .options-bar {
        flex-direction: column;
        align-items: flex-start;
    }
}