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

:root {
    --bg: #0a0a0a;
    --surface: #1a1a1a;
    --surface-2: #252525;
    --border: #333;
    --border-light: #444;
    --text: #0f0;
    --text-dim: #0a0;
    --text-muted: #666;
    --accent: #0f0;
    --accent-2: #0f0;
    --header-bg: #333;
    --card-bg: #1a1a1a;
    --input-bg: #0d0d0d;
    --btn-bg: transparent;
    --btn-border: #0f0;
    --btn-text: #0f0;
    --btn-hover-bg: #0f0;
    --btn-hover-text: #000;
    --control-close: #ff5f56;
    --control-min: #ffbd2e;
    --control-max: #27ca40;
    --tab-active: #0f0;
    --font-mono: "Courier New", Courier, monospace;
    --font-ui: "Courier New", Courier, monospace;
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --card-border: 1px solid var(--border);
    --card-radius: 6px;
    --glow: none;
}

[data-theme="light"] {
    --bg: #008080;
    --surface: #c0c0c0;
    --surface-2: #d4d4d4;
    --border: #808080;
    --border-light: #dfdfdf;
    --text: #000;
    --text-dim: #333;
    --text-muted: #555;
    --accent: #000080;
    --accent-2: #000080;
    --header-bg: #000080;
    --card-bg: #c0c0c0;
    --input-bg: #fff;
    --btn-bg: #c0c0c0;
    --btn-border: #c0c0c0;
    --btn-text: #000;
    --btn-hover-bg: #d4d4d4;
    --btn-hover-text: #000;
    --control-close: #c0c0c0;
    --control-min: #c0c0c0;
    --control-max: #c0c0c0;
    --tab-active: #000080;
    --font-ui: "MS Sans Serif", Tahoma, sans-serif;
    --card-shadow: none;
    --card-border: 2px outset #dfdfdf;
    --card-radius: 0;
    --glow: none;
}

[data-theme="cyber"] {
    --bg: #0a0a12;
    --surface: #12121a;
    --surface-2: #1a1a25;
    --border: #ff184c;
    --border-light: #00fff2;
    --text: #00fff2;
    --text-dim: #ff184c;
    --text-muted: #8b8b9a;
    --accent: #ff184c;
    --accent-2: #00fff2;
    --header-bg: linear-gradient(90deg, #ff184c 0%, #0a0a12 50%, #00fff2 100%);
    --card-bg: #0f0f18;
    --input-bg: #08080d;
    --btn-bg: transparent;
    --btn-border: #ff184c;
    --btn-text: #ff184c;
    --btn-hover-bg: #ff184c;
    --btn-hover-text: #000;
    --control-close: #ff184c;
    --control-min: #fded00;
    --control-max: #00fff2;
    --tab-active: #00fff2;
    --card-shadow: 0 0 20px rgba(255, 24, 76, 0.3), 0 0 40px rgba(0, 255, 242, 0.1);
    --card-border: 1px solid #ff184c;
    --card-radius: 0;
    --glow: 0 0 10px currentColor;
}

body {
    font-family: var(--font-mono);
    background: var(--bg);
    color: var(--text);
    display: flex;
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

[data-theme="cyber"] body {
    background: var(--bg);
    background-image: 
        linear-gradient(rgba(255, 24, 76, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 24, 76, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.sidebar {
    width: 220px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

[data-theme="light"] .sidebar {
    border: 2px outset var(--border-light);
}

[data-theme="cyber"] .sidebar {
    border-right: 1px solid var(--accent);
    box-shadow: inset -5px 0 20px rgba(255, 24, 76, 0.1);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

[data-theme="light"] .sidebar-header {
    background: var(--header-bg);
    border-bottom: 2px groove var(--border);
}

[data-theme="cyber"] .sidebar-header {
    background: var(--header-bg);
    border-bottom: 1px solid var(--accent);
}

.logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

[data-theme="light"] .logo {
    color: #fff;
}

[data-theme="cyber"] .logo {
    color: var(--accent-2);
    text-shadow: var(--glow), 0 0 20px var(--accent-2);
    animation: cyberFlicker 3s infinite;
}

.logo::before {
    content: "> ";
    animation: blink 1s step-end infinite;
}

[data-theme="light"] .logo::before {
    content: "◆ ";
    animation: none;
}

[data-theme="cyber"] .logo::before {
    content: "// ";
    color: var(--accent);
    animation: none;
}

.theme-toggle {
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    color: var(--btn-text);
    width: 32px;
    height: 32px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

[data-theme="light"] .theme-toggle {
    border: 2px outset var(--border-light);
    border-radius: 0;
}

[data-theme="light"] .theme-toggle:active {
    border: 2px inset var(--border);
}

[data-theme="cyber"] .theme-toggle {
    border: 1px solid var(--accent);
    border-radius: 0;
    clip-path: polygon(10% 0, 100% 0, 100% 70%, 90% 100%, 0 100%, 0 30%);
}

[data-theme="cyber"] .theme-toggle:hover {
    box-shadow: var(--glow);
    background: rgba(255, 24, 76, 0.2);
}

.theme-icon-light,
.theme-icon-cyber { display: none; }
.theme-icon-dark { display: block; }

[data-theme="light"] .theme-icon-light { display: block; }
[data-theme="light"] .theme-icon-dark,
[data-theme="light"] .theme-icon-cyber { display: none; }

[data-theme="cyber"] .theme-icon-cyber { display: block; }
[data-theme="cyber"] .theme-icon-dark,
[data-theme="cyber"] .theme-icon-light { display: none; }

@keyframes blink {
    50% { opacity: 0; }
}

@keyframes cyberFlicker {
    0%, 100% { opacity: 1; }
    92% { opacity: 1; }
    93% { opacity: 0.8; }
    94% { opacity: 1; }
    95% { opacity: 0.9; }
    96% { opacity: 1; }
}

@keyframes glitchText {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100vh); }
}

.sidebar-tagline {
    padding: 0 20px 16px;
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

[data-theme="light"] .sidebar-tagline {
    color: var(--text-dim);
    font-family: var(--font-ui);
}

[data-theme="cyber"] .sidebar-tagline {
    color: var(--accent);
    text-shadow: var(--glow);
}

.resources-btn {
    display: block;
    margin: 0 12px 12px;
    padding: 12px 16px;
    background: var(--btn-bg);
    border: 1px solid var(--accent);
    color: var(--text);
    text-decoration: none;
    font-size: 13px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.resources-btn:hover,
.resources-btn.active {
    background: var(--accent);
    color: var(--bg);
}

[data-theme="light"] .resources-btn {
    border: 2px outset var(--border-light);
    background: var(--btn-bg);
    font-family: var(--font-ui);
}

[data-theme="light"] .resources-btn:hover,
[data-theme="light"] .resources-btn.active {
    background: var(--btn-hover-bg);
    color: var(--text);
}

[data-theme="light"] .resources-btn:active {
    border: 2px inset var(--border);
}

[data-theme="cyber"] .resources-btn {
    border: 1px solid var(--accent);
    clip-path: polygon(8% 0, 100% 0, 100% 70%, 92% 100%, 0 100%, 0 30%);
    text-transform: uppercase;
    letter-spacing: 2px;
}

[data-theme="cyber"] .resources-btn:hover,
[data-theme="cyber"] .resources-btn.active {
    box-shadow: var(--glow), 0 0 20px rgba(255, 24, 76, 0.5);
    background: rgba(255, 24, 76, 0.2);
    color: var(--text);
}

.sidebar-section-title {
    padding: 8px 20px;
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    border-top: 1px solid var(--border);
}

[data-theme="light"] .sidebar-section-title {
    background: var(--surface-2);
    border-top: 1px groove var(--border);
    font-family: var(--font-ui);
}

[data-theme="cyber"] .sidebar-section-title {
    border-top: 1px solid var(--accent);
    color: var(--accent-2);
}

nav {
    display: flex;
    flex-direction: column;
    padding: 8px 0;
    flex: 1;
}

.nav-item {
    padding: 10px 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: all 0.15s;
    border-left: 2px solid transparent;
    position: relative;
}

[data-theme="light"] .nav-item {
    border-left: none;
    padding: 8px 16px;
    margin: 2px 8px;
}

[data-theme="cyber"] .nav-item {
    border-left: none;
    padding: 10px 20px;
    clip-path: polygon(0 0, 95% 0, 100% 50%, 95% 100%, 0 100%);
}

.nav-item:hover {
    color: var(--text);
    background: rgba(0, 255, 0, 0.05);
}

[data-theme="light"] .nav-item:hover {
    background: var(--surface-2);
}

[data-theme="cyber"] .nav-item:hover {
    background: rgba(255, 24, 76, 0.1);
    text-shadow: var(--glow);
}

.nav-item.active {
    color: var(--text);
    background: rgba(0, 255, 0, 0.1);
    border-left-color: var(--accent);
}

[data-theme="light"] .nav-item.active {
    background: var(--accent);
    color: #fff;
    border-left: none;
}

[data-theme="cyber"] .nav-item.active {
    background: linear-gradient(90deg, rgba(255, 24, 76, 0.3) 0%, transparent 100%);
    color: var(--accent-2);
    border-left: 3px solid var(--accent);
    text-shadow: var(--glow);
}

.nav-item::before {
    content: "$ ";
    color: var(--text-dim);
}

[data-theme="light"] .nav-item::before {
    content: "► ";
}

[data-theme="light"] .nav-item.active::before {
    color: #fff;
}

[data-theme="cyber"] .nav-item::before {
    content: "» ";
    color: var(--accent);
}

.content {
    flex: 1;
    margin-left: 220px;
    padding: 32px 40px;
    max-width: 1200px;
}

.tool {
    display: none;
}

.tool.active {
    display: block;
}

h1 {
    font-size: 22px;
    font-weight: normal;
    margin-bottom: 24px;
    color: var(--text);
}

h1::before {
    content: "# ";
    color: var(--text-dim);
}

[data-theme="light"] h1::before {
    content: "";
}

[data-theme="light"] h1 {
    font-weight: bold;
    font-family: var(--font-ui);
}

[data-theme="cyber"] h1 {
    text-transform: uppercase;
    letter-spacing: 4px;
    text-shadow: var(--glow), 2px 2px 0 var(--accent);
}

[data-theme="cyber"] h1::before {
    content: "< ";
    color: var(--accent);
}

[data-theme="cyber"] h1::after {
    content: " />";
    color: var(--accent);
}

.tool-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin: -16px 0 24px;
    line-height: 1.6;
    max-width: 700px;
}

[data-theme="light"] .tool-desc {
    font-family: var(--font-ui);
}

[data-theme="cyber"] .tool-desc {
    color: var(--text-dim);
    border-left: 2px solid var(--accent);
    padding-left: 12px;
}

.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    position: relative;
}

[data-theme="cyber"] .card {
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 15px 100%, 0 calc(100% - 15px));
}

[data-theme="cyber"] .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        transparent 0%,
        rgba(255, 24, 76, 0.05) 50%,
        transparent 100%
    );
    pointer-events: none;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--header-bg);
    padding: 0 8px;
    height: 28px;
}

[data-theme="light"] .card-header {
    background: linear-gradient(90deg, #000080, #1084d0);
}

[data-theme="cyber"] .card-header {
    background: linear-gradient(90deg, var(--accent) 0%, var(--surface) 30%, var(--surface) 70%, var(--accent-2) 100%);
    border-bottom: 1px solid var(--accent);
}

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

.card-tab {
    font-size: 12px;
    color: var(--text-muted);
    padding: 4px 8px;
}

[data-theme="light"] .card-tab {
    color: #fff;
    font-family: var(--font-ui);
    font-weight: bold;
}

[data-theme="cyber"] .card-tab {
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 10px;
}

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

[data-theme="light"] .card-tab.active {
    color: #fff;
}

.window-controls {
    display: flex;
    gap: 6px;
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control.close { background: var(--control-close); }
.control.minimize { background: var(--control-min); }
.control.maximize { background: var(--control-max); }

[data-theme="light"] .control {
    width: 16px;
    height: 14px;
    border-radius: 0;
    border: 1px outset var(--border-light);
    background: var(--surface);
}

[data-theme="light"] .control.close::after {
    content: "×";
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    color: #000;
    height: 100%;
}

[data-theme="light"] .control.minimize::after {
    content: "_";
    display: flex;
    align-items: flex-end;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
    color: #000;
    height: 100%;
    padding-bottom: 2px;
}

[data-theme="light"] .control.maximize::after {
    content: "□";
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: #000;
    height: 100%;
}

[data-theme="cyber"] .control {
    width: 10px;
    height: 10px;
    border-radius: 0;
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.card-body {
    padding: 12px;
    flex: 1;
    min-height: 220px;
    background: var(--input-bg);
}

[data-theme="light"] .card-body {
    border: 2px inset var(--border);
    margin: 4px;
}

[data-theme="cyber"] .card-body {
    border: 1px solid rgba(255, 24, 76, 0.3);
    margin: 4px;
    position: relative;
}

[data-theme="cyber"] .card-body::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-2), transparent);
    animation: scanlineSmall 3s linear infinite;
    opacity: 0.5;
    pointer-events: none;
}

@keyframes scanlineSmall {
    0% { top: 0; }
    100% { top: 100%; }
}

.card-body-sm {
    min-height: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

.card-body-input {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 120px;
}

.card-footer {
    padding: 6px 12px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-muted);
}

[data-theme="light"] .card-footer {
    border-top: 2px groove var(--border);
    font-family: var(--font-ui);
}

[data-theme="cyber"] .card-footer {
    background: var(--surface);
    border-top: 1px solid var(--accent);
    display: flex;
    justify-content: space-between;
}

[data-theme="cyber"] .card-footer::after {
    content: '■ ■ ■';
    color: var(--accent);
    letter-spacing: 2px;
    font-size: 8px;
}

.status-text {
    opacity: 0.7;
}

textarea {
    width: 100%;
    height: 100%;
    min-height: 180px;
    background: transparent;
    border: none;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 13px;
    resize: none;
    outline: none;
}

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

[data-theme="cyber"] textarea {
    color: var(--accent-2);
}

[data-theme="cyber"] textarea::placeholder {
    color: rgba(0, 255, 242, 0.3);
}

input[type="text"],
input[type="number"],
input[type="datetime-local"] {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 8px 12px;
    outline: none;
    width: 100%;
}

[data-theme="light"] input[type="text"],
[data-theme="light"] input[type="number"],
[data-theme="light"] input[type="datetime-local"] {
    border: 2px inset var(--border);
}

[data-theme="cyber"] input[type="text"],
[data-theme="cyber"] input[type="number"],
[data-theme="cyber"] input[type="datetime-local"] {
    border: 1px solid var(--accent);
    color: var(--accent-2);
    background: rgba(0, 0, 0, 0.5);
}

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

[data-theme="cyber"] input:focus {
    box-shadow: 0 0 10px var(--accent), inset 0 0 10px rgba(255, 24, 76, 0.1);
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button {
    background: var(--btn-bg);
    color: var(--btn-text);
    border: 1px solid var(--btn-border);
    border-radius: 4px;
    padding: 10px 20px;
    font-size: 13px;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
    overflow: hidden;
}

button:hover {
    background: var(--btn-hover-bg);
    color: var(--btn-hover-text);
}

button.primary {
    background: var(--btn-hover-bg);
    color: var(--btn-hover-text);
}

[data-theme="light"] button {
    border: 2px outset var(--border-light);
    border-radius: 0;
    font-family: var(--font-ui);
    padding: 6px 16px;
}

[data-theme="light"] button:active {
    border: 2px inset var(--border);
}

[data-theme="light"] button.primary {
    background: var(--surface);
    font-weight: bold;
}

[data-theme="cyber"] button {
    border-radius: 0;
    clip-path: polygon(10% 0, 100% 0, 100% 70%, 90% 100%, 0 100%, 0 30%);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 11px;
}

[data-theme="cyber"] button:hover {
    box-shadow: 0 0 20px var(--accent), inset 0 0 20px rgba(255, 24, 76, 0.2);
}

[data-theme="cyber"] button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

[data-theme="cyber"] button:hover::before {
    left: 100%;
}

[data-theme="cyber"] button.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #000;
}

.tool-single {
    max-width: 700px;
}

.tool-single .card {
    margin-bottom: 16px;
}

.options-panel {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: var(--surface);
    border: var(--card-border);
    border-radius: var(--card-radius);
}

[data-theme="cyber"] .options-panel {
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.options-panel label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
}

.options-panel label:hover {
    color: var(--text);
}

.options-panel input[type="checkbox"] {
    appearance: none;
    width: 16px;
    height: 16px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    cursor: pointer;
    position: relative;
}

[data-theme="light"] .options-panel input[type="checkbox"] {
    border: 2px inset var(--border);
}

[data-theme="cyber"] .options-panel input[type="checkbox"] {
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    border-color: var(--accent);
}

.options-panel input[type="checkbox"]:checked {
    background: var(--accent);
    border-color: var(--accent);
}

[data-theme="light"] .options-panel input[type="checkbox"]:checked {
    background: var(--input-bg);
}

[data-theme="cyber"] .options-panel input[type="checkbox"]:checked {
    box-shadow: 0 0 10px var(--accent);
}

.options-panel input[type="checkbox"]:checked::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--bg);
    font-size: 12px;
}

[data-theme="light"] .options-panel input[type="checkbox"]:checked::after {
    color: var(--text);
}

[data-theme="cyber"] .options-panel input[type="checkbox"]:checked::after {
    content: "◆";
    font-size: 8px;
}

.options-panel input[type="number"] {
    width: 60px;
    padding: 4px 8px;
}

.password-input {
    font-size: 18px;
    letter-spacing: 1px;
    flex: 1;
}

.result-input {
    flex: 1;
}

.result-card {
    margin-top: 16px;
}

.hash-results {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hash-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.hash-row span {
    width: 60px;
    font-size: 11px;
    color: var(--text-muted);
    text-align: right;
}

[data-theme="cyber"] .hash-row span {
    color: var(--accent);
}

.hash-row input {
    flex: 1;
    font-size: 11px;
    padding: 6px 8px;
}

.regex-header {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.regex-card {
    flex: 1;
}

.regex-card-flags {
    max-width: 100px;
}

.resources-section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.section-title::before {
    content: "// ";
    color: var(--accent);
}

[data-theme="light"] .section-title::before {
    content: "► ";
}

[data-theme="cyber"] .section-title {
    text-transform: uppercase;
    letter-spacing: 3px;
    border-bottom-color: var(--accent);
}

.resources-grid {
    display: grid;
    gap: 16px;
}

.books-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
}

.videos-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.sites-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.resource-card {
    background: var(--surface);
    border: var(--card-border);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: all 0.2s;
    text-decoration: none;
    color: var(--text);
    display: block;
}

.resource-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

[data-theme="cyber"] .resource-card {
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

[data-theme="cyber"] .resource-card:hover {
    border-color: var(--accent-2);
    box-shadow: 0 0 20px rgba(255, 24, 76, 0.3);
}

.book-card {
    text-align: center;
}

.book-cover {
    width: 100%;
    aspect-ratio: 2/3;
    overflow: hidden;
    background: var(--input-bg);
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.book-card:hover .book-cover img {
    transform: scale(1.05);
}

.book-info {
    padding: 12px;
}

.book-title {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
    line-height: 1.3;
}

.book-author {
    font-size: 11px;
    color: var(--text-muted);
}

.video-card {
    background: var(--card-bg);
}

.video-embed {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
}

.video-embed iframe {
    width: 100%;
    height: 100%;
}

.video-info {
    padding: 12px;
}

.video-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    line-height: 1.3;
}

.video-channel {
    font-size: 11px;
    color: var(--text-muted);
}

[data-theme="cyber"] .video-channel {
    color: var(--accent);
}

.site-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
}

.site-icon {
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: bold;
    flex-shrink: 0;
}

[data-theme="light"] .site-icon {
    background: var(--header-bg);
    color: #fff;
}

[data-theme="cyber"] .site-icon {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.site-icon.tg {
    background: #26a5e4;
    color: #fff;
}

[data-theme="cyber"] .site-icon.tg {
    background: transparent;
    border-color: #26a5e4;
    color: #26a5e4;
}

.site-info {
    flex: 1;
    min-width: 0;
}

.site-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.site-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.3;
}

@media (max-width: 900px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .sidebar-header {
        padding: 12px 16px;
    }

    nav {
        flex-direction: row;
        overflow-x: auto;
        padding: 0 8px 8px;
    }

    .nav-item {
        white-space: nowrap;
        padding: 8px 12px;
        border-left: none;
        border-bottom: 2px solid transparent;
        margin: 0;
    }

    .nav-item.active {
        border-left-color: transparent;
        border-bottom-color: var(--accent);
    }

    [data-theme="light"] .nav-item.active,
    [data-theme="cyber"] .nav-item.active {
        border-bottom: none;
    }

    body {
        flex-direction: column;
    }

    .content {
        margin-left: 0;
        padding: 20px 16px;
    }

    .tool-grid {
        grid-template-columns: 1fr;
    }

    .regex-header {
        flex-direction: column;
    }

    .regex-card-flags {
        max-width: none;
    }

    .books-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .videos-grid {
        grid-template-columns: 1fr;
    }

    .sites-grid {
        grid-template-columns: 1fr;
    }
}