/* =====================================================
   QUANTUM KEYGEN - Professional Dark Theme
   Full width, subtle professional colors
   ===================================================== */

:root {
    /* Grays */
    --white: #ffffff;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    --black: #0a0a0a;

    /* Professional accent colors */
    --blue: #3b82f6;
    --blue-muted: #2563eb;
    --green: #22c55e;
    --amber: #f59e0b;
    --red: #ef4444;

    /* Theme */
    --bg: #0a0a0a;
    --surface: #111111;
    --surface-elevated: #181818;
    --border: #1f1f1f;
    --border-hover: #333333;
    --text: #e5e5e5;
    --text-muted: #737373;
    --accent: var(--blue);

    --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    min-height: 100vh;
}

/* Full width container */
.container {
    width: 100%;
    min-height: 100vh;
    background: var(--surface);
}

/* Header */
header {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
    background: var(--surface-elevated);
}

h1 {
    font-family: var(--font-mono);
    font-size: 18px;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 2px;
    margin-bottom: 2px;
}

.subtitle {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Grid - Full width */
.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    min-height: calc(100vh - 80px);
}

@media (min-width: 900px) {
    .main-grid {
        grid-template-columns: minmax(520px, 1fr) minmax(400px, 1.2fr);
    }
}

@media (min-width: 1400px) {
    .main-grid {
        grid-template-columns: 580px 1fr;
    }
}

.left-panel {
    padding: 28px 32px;
    border-right: 1px solid var(--border);
    background: var(--surface);
}

.right-panel {
    padding: 28px 32px;
    background: var(--bg);
}

@media (max-width: 899px) {
    .left-panel {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
}

/* Entropy Section */
.entropy-section {
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.entropy-visualizer {
    background: var(--black);
    border: 1px solid var(--border);
    border-radius: 6px;
    height: 52px;
    position: relative;
    overflow: hidden;
}

canvas {
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

.entropy-status {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 14px;
    background: rgba(0, 0, 0, 0.85);
    font-size: 11px;
}

#entropy-label {
    color: var(--accent);
    flex-shrink: 0;
    font-weight: 500;
}

.progress-bar {
    flex: 1;
    height: 4px;
    background: var(--gray-800);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    transition: width 0.2s ease;
}

#entropy-percentage {
    color: var(--white);
    font-weight: 600;
    min-width: 40px;
    text-align: right;
}

.instruction {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Controls */
.controls-section {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.control-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

/* Override for checkbox/radio groups inside control-group */
.control-group.checkbox-group {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

input[type="number"] {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--white);
    padding: 10px 12px;
    font-family: var(--font-mono);
    font-size: 14px;
    transition: border-color 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--accent);
}

input[type="number"]:hover {
    border-color: var(--border-hover);
}

/* Toggle */
.cyber-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 11px;
    color: var(--text-muted);
    padding: 6px 0;
}

.cyber-toggle input {
    display: none;
}

.toggle-track {
    width: 38px;
    height: 20px;
    background: var(--gray-800);
    border-radius: 10px;
    position: relative;
    transition: background 0.2s;
}

.toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--gray-500);
    border-radius: 50%;
    transition: all 0.2s;
}

.cyber-toggle input:checked+.toggle-track {
    background: var(--accent);
}

.cyber-toggle input:checked+.toggle-track .toggle-thumb {
    left: 20px;
    background: var(--white);
}

/* Paranoid mode - red accent */
.special-mode .cyber-toggle input:checked+.toggle-track {
    background: var(--red);
}

/* Checkboxes & Radios - Horizontal layout with grid */
.checkbox-group {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    flex-direction: row !important;
}

.radio-group {
    display: grid !important;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}

.cyber-checkbox,
.cyber-radio {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 11px;
    color: var(--text-muted);
    padding: 8px 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    transition: all 0.15s;
    justify-content: center;
    white-space: nowrap;
}

.cyber-checkbox:hover,
.cyber-radio:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

.cyber-checkbox input,
.cyber-radio input {
    display: none;
}

.checkmark,
.radio-mark {
    width: 12px;
    height: 12px;
    border: 1px solid var(--gray-600);
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    flex-shrink: 0;
}

.radio-mark {
    border-radius: 50%;
}

.cyber-checkbox input:checked+.checkmark,
.cyber-radio input:checked+.radio-mark {
    background: var(--accent);
    border-color: var(--accent);
}

.cyber-checkbox input:checked+.checkmark::after {
    content: '✓';
    font-size: 8px;
    color: var(--white);
    font-weight: 700;
}

.cyber-radio input:checked+.radio-mark::after {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--white);
    border-radius: 50%;
}

.cyber-checkbox:has(input:checked),
.cyber-radio:has(input:checked) {
    border-color: var(--accent);
    color: var(--white);
    background: rgba(59, 130, 246, 0.08);
}

/* Main Button */
.cyber-button {
    width: 100%;
    padding: 14px 24px;
    background: var(--accent);
    border: none;
    border-radius: 6px;
    color: var(--white);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s;
}

.cyber-button:hover:not(:disabled) {
    background: var(--blue-muted);
}

.cyber-button:active:not(:disabled) {
    transform: translateY(1px);
}

.cyber-button:disabled {
    background: var(--gray-800);
    color: var(--gray-600);
    cursor: not-allowed;
}

/* Secondary Buttons */
.secondary-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-muted);
    padding: 8px 14px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.15s;
}

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

.secondary-btn.danger {
    color: var(--gray-500);
}

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

/* Output */
.output-section {
    margin-bottom: 24px;
}

.batch-output {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 16px;
    min-height: 180px;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 16px;
}

.password-item {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--green);
    padding: 10px 12px;
    background: rgba(34, 197, 94, 0.06);
    border: 1px solid rgba(34, 197, 94, 0.15);
    border-radius: 4px;
    margin-bottom: 8px;
    word-break: break-all;
}

.password-item:last-child {
    margin-bottom: 0;
}

.placeholder {
    color: var(--gray-600);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 40px 0;
    text-align: center;
}

.history-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

/* Security Log */
.security-log {
    font-size: 11px;
    color: var(--gray-600);
    border-top: 1px solid var(--border);
    padding-top: 12px;
    max-height: 80px;
    overflow-y: auto;
}

.log-entry {
    padding: 3px 0;
}

.log-entry.warn {
    color: var(--amber);
}

.log-entry.success {
    color: var(--green);
}

/* History */
.history-section {
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.history-section h3 {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.history-list {
    max-height: 280px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    font-size: 11px;
    padding: 8px 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-bottom: 6px;
}

.history-item:hover {
    border-color: var(--border-hover);
}

.history-time {
    color: var(--gray-600);
    margin-right: 14px;
    flex-shrink: 0;
}

.history-pass {
    color: var(--gray-400);
    word-break: break-all;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-700);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-600);
}

/* =====================================================
   MOBILE RESPONSIVE STYLES
   ===================================================== */

@media (max-width: 600px) {
    body {
        font-size: 14px;
    }

    /* Header - smaller padding */
    header {
        padding: 16px 16px;
        position: sticky;
        top: 0;
        z-index: 100;
    }

    h1 {
        font-size: 16px;
        letter-spacing: 1px;
    }

    .subtitle {
        font-size: 9px;
        letter-spacing: 0.5px;
    }

    /* Panels - reduced padding */
    .left-panel,
    .right-panel {
        padding: 16px;
    }

    /* Entropy section */
    .entropy-section {
        margin-bottom: 16px;
        padding-bottom: 16px;
    }

    .entropy-visualizer {
        height: 44px;
    }

    .entropy-status {
        padding: 8px 10px;
        gap: 8px;
        font-size: 10px;
    }

    #entropy-percentage {
        min-width: 32px;
    }

    .instruction {
        font-size: 9px;
        margin-top: 8px;
    }

    /* Controls - tighter spacing */
    .controls-section {
        gap: 12px;
    }

    .control-row {
        gap: 8px;
    }

    .control-group {
        gap: 4px;
    }

    label {
        font-size: 9px;
    }

    input[type="number"] {
        padding: 12px 10px;
        font-size: 16px;
        /* Prevents zoom on iOS */
    }

    /* Toggle - touch friendly */
    .cyber-toggle {
        font-size: 10px;
        padding: 8px 0;
    }

    /* Checkboxes - 3 columns on mobile, smaller */
    .control-group.checkbox-group,
    .checkbox-group {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 4px;
    }

    /* Radio buttons - 2x2 grid on mobile */
    .radio-group {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 4px;
    }

    .cyber-checkbox,
    .cyber-radio {
        font-size: 10px;
        padding: 10px 6px;
        gap: 4px;
    }

    .checkmark,
    .radio-mark {
        width: 14px;
        height: 14px;
    }

    .cyber-checkbox input:checked+.checkmark::after {
        font-size: 9px;
    }

    /* Main button - larger touch target */
    .cyber-button {
        padding: 16px 20px;
        font-size: 13px;
        letter-spacing: 1px;
    }

    /* Secondary buttons */
    .secondary-btn {
        padding: 10px 12px;
        font-size: 9px;
    }

    .history-controls {
        gap: 6px;
    }

    /* Output section */
    .batch-output {
        min-height: 120px;
        max-height: 200px;
        padding: 12px;
    }

    .password-item {
        font-size: 11px;
        padding: 8px 10px;
    }

    .placeholder {
        font-size: 10px;
        padding: 30px 0;
    }

    /* Security log */
    .security-log {
        font-size: 10px;
        max-height: 60px;
    }

    /* History */
    .history-section {
        padding-top: 16px;
    }

    .history-section h3 {
        font-size: 10px;
        margin-bottom: 10px;
    }

    .history-list {
        max-height: 150px;
    }

    .history-item {
        font-size: 10px;
        padding: 6px 8px;
        flex-direction: column;
        gap: 4px;
    }

    .history-time {
        margin-right: 0;
        font-size: 9px;
    }
}

/* Extra small screens (< 360px) */
@media (max-width: 360px) {

    .checkbox-group,
    .control-group.checkbox-group {
        grid-template-columns: repeat(3, 1fr) !important;
    }

    .radio-group {
        grid-template-columns: 1fr 1fr !important;
    }

    .cyber-checkbox,
    .cyber-radio {
        font-size: 9px;
        padding: 8px 4px;
    }
}

/* PWA Standalone mode */
@media (display-mode: standalone) {
    header {
        padding-top: env(safe-area-inset-top, 16px);
    }

    .container {
        padding-bottom: env(safe-area-inset-bottom, 0);
    }
}

/* Touch device optimizations - larger touch targets */
@media (hover: none) and (pointer: coarse) {

    /* Remove hover effects on touch */
    .cyber-checkbox:hover,
    .cyber-radio:hover,
    .secondary-btn:hover {
        border-color: var(--border);
        color: inherit;
    }

    /* Active states for touch feedback */
    .cyber-checkbox:active,
    .cyber-radio:active {
        background: rgba(59, 130, 246, 0.2);
        transform: scale(0.98);
    }

    .secondary-btn:active {
        background: var(--gray-800);
        transform: scale(0.98);
    }

    /* Larger buttons for touch */
    .cyber-button {
        min-height: 56px;
        font-size: 14px;
    }

    .secondary-btn {
        min-height: 44px;
        padding: 12px 16px;
        font-size: 11px;
    }

    /* Larger checkboxes and radios */
    .cyber-checkbox,
    .cyber-radio {
        min-height: 44px;
        padding: 12px 8px;
    }

    .checkmark,
    .radio-mark {
        width: 18px;
        height: 18px;
    }

    /* Password items - tap to copy */
    .password-item {
        min-height: 48px;
        display: flex;
        align-items: center;
        cursor: pointer;
        position: relative;
        padding-right: 40px;
    }

    .password-item::after {
        content: '📋';
        position: absolute;
        right: 10px;
        font-size: 16px;
        opacity: 0.5;
    }

    .password-item:active {
        background: rgba(34, 197, 94, 0.15);
        transform: scale(0.99);
    }

    /* History items - tap to copy */
    .history-item {
        min-height: 44px;
        cursor: pointer;
    }

    .history-item:active {
        background: rgba(59, 130, 246, 0.15);
    }

    /* Input fields - larger for touch */
    input[type="number"] {
        min-height: 48px;
        font-size: 18px;
    }

    /* Toggle - larger */
    .toggle-track {
        width: 48px;
        height: 26px;
    }

    .toggle-thumb {
        width: 20px;
        height: 20px;
        top: 3px;
        left: 3px;
    }

    .cyber-toggle input:checked+.toggle-track .toggle-thumb {
        left: 25px;
    }
}

/* High DPI screens (retina) */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {

    .password-item,
    .history-item {
        border-width: 0.5px;
    }
}

/* Tap-to-copy feedback animation */
.password-item.copied,
.history-item.copied {
    animation: copyFlash 0.4s ease;
}

@keyframes copyFlash {
    0% {
        background: rgba(34, 197, 94, 0.3);
    }

    100% {
        background: rgba(34, 197, 94, 0.06);
    }
}

/* Copy tooltip */
.copy-toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--green);
    color: var(--black);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.copy-toast.show {
    opacity: 1;
}