/* FrequencyAtune™ - Tightened & Modern Styling */

body {
    font-family: Arial, sans-serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 15px;
    margin: 0;
    overflow-x: hidden;
}

/* Background Canvas */
#frequency-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Welcome Popup - keeping original styles */
.welcome-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    overflow-y: auto;
    padding: 20px;
    box-sizing: border-box;
}

.welcome-overlay.hidden {
    display: none;
}

.welcome-modal {
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    border: 3px solid #4CAF50;
    border-radius: 15px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(76, 175, 80, 0.5);
    margin: auto;
}

.welcome-header {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    padding: 25px 20px;
    text-align: center;
    border-radius: 12px 12px 0 0;
}

.welcome-header h2 {
    margin: 0 0 8px 0;
    color: white;
    font-size: 1.2em;
    font-weight: 400;
}

.welcome-header h1 {
    margin: 0 0 15px 0;
    color: white;
    font-size: 1.6em;
    line-height: 1.3;
}

.welcome-logo {
    max-width: 180px;
    height: auto;
    filter: brightness(1.2);
}

.welcome-content {
    padding: 20px;
    color: #e0e0e0;
}

.welcome-content h3 {
    color: #8BC34A;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.2em;
}

.welcome-content p {
    line-height: 1.5;
    margin-bottom: 12px;
}

.welcome-content ul {
    margin: 12px 0;
    padding-left: 20px;
}

.welcome-content li {
    margin-bottom: 8px;
    line-height: 1.4;
}

.caution-box {
    background-color: #3a2a1a;
    border-left: 4px solid #ff9800;
    padding: 12px;
    margin: 15px 0;
    border-radius: 5px;
}

.caution-box h4 {
    color: #ffb74d;
    margin-top: 0;
    margin-bottom: 8px;
}

.caution-box p {
    margin-bottom: 8px;
    font-size: 0.9em;
    line-height: 1.5;
}

.acceptance-section {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #444;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    margin-bottom: 12px;
    padding: 10px 12px;
    background-color: #2a2a2a;
    border-radius: 6px;
    border: 1px solid #444;
    transition: all 0.3s ease;
    user-select: none;
}

.checkbox-container:hover {
    background-color: #333;
    border-color: #4CAF50;
}

.checkbox-container input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    height: 20px;
    width: 20px;
    min-width: 20px;
    background-color: #3a3a3a;
    border: 2px solid #666;
    border-radius: 4px;
    margin-right: 10px;
    margin-top: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.checkbox-container:hover .checkmark {
    border-color: #4CAF50;
}

.checkbox-container input:checked ~ .checkmark {
    background-color: #4CAF50;
    border-color: #4CAF50;
}

.checkmark:after {
    content: "";
    display: none;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-text {
    color: #e0e0e0;
    font-size: 0.9em;
    line-height: 1.4;
}

.dont-show-container {
    background-color: transparent;
    border: none;
    padding: 6px 12px;
    margin-bottom: 15px;
}

.dont-show-container:hover {
    background-color: transparent;
    border: none;
}

.dont-show-container .checkbox-text {
    color: #888;
    font-size: 0.85em;
}

.continue-btn {
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(135deg, #3a3a3a 0%, #2c2c2c 100%);
    color: #666;
    border: 2px solid #444;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: not-allowed;
    transition: all 0.3s ease;
    text-align: center;
}

.continue-btn:disabled {
    opacity: 0.7;
}

.continue-btn:not(:disabled) {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    color: white;
    border-color: #4CAF50;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
}

.continue-btn:not(:disabled):hover {
    background: linear-gradient(135deg, #66BB6A 0%, #81C784 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
}

/* Container */
.container {
    background-color: rgba(44, 44, 44, 0.95);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 480px;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* Header with Icons */
.header-icons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.header-icons h1 {
    margin: 0;
    text-align: center;
    flex: 1;
}

.icon-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid #4CAF50;
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    color: white;
    font-size: 1.2em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.icon-button:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.6);
}

.install-icon {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
}

.install-icon.hidden {
    display: none;
}

h1 {
    text-align: center;
    color: #4CAF50;
    font-size: 1.4em;
    margin-bottom: 15px;
}

/* Main Control Buttons - Slimmer */
.main-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.main-control-btn {
    width: 100%;
    padding: 10px 15px;
    background: linear-gradient(135deg, #3a3a3a 0%, #2c2c2c 100%);
    border: 2px solid #4CAF50;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 0.95em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.main-control-btn:hover {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    transform: translateX(3px);
    box-shadow: 0 2px 10px rgba(76, 175, 80, 0.5);
}

.control-icon {
    font-size: 1.3em;
}

/* Selection Info Box - Electric Blue */
.selection-info-box {
    background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 100%);
    border: 3px solid #2196F3;
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 12px;
    box-shadow: 0 0 15px rgba(33, 150, 243, 0.4);
    min-height: 40px;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
}

.info-item.hidden {
    display: none;
}

.info-label {
    color: #4CAF50;
    font-weight: 600;
    font-size: 0.9em;
}

.info-value {
    color: #2196F3;
    font-weight: 600;
    text-align: right;
    font-size: 0.9em;
}

/* Side Draw System */
.side-draw {
    position: fixed;
    top: 0;
    right: -100%;
    width: 450px;
    height: 100vh;
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    border-left: 3px solid #4CAF50;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.7);
    z-index: 9998;
    transition: right 0.4s ease;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.side-draw.active {
    right: 0;
}

.draw-header {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #66BB6A;
    flex-shrink: 0;
}

.draw-header h3 {
    margin: 0;
    color: white;
    font-size: 1.2em;
}

.draw-close {
    background: transparent;
    border: 2px solid white;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 1.2em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.draw-close:hover {
    background: white;
    color: #4CAF50;
    transform: rotate(90deg);
}

.draw-content {
    padding: 15px;
    overflow-y: auto;
    flex: 1;
}

.intro-text {
    margin-bottom: 15px;
    line-height: 1.5;
    color: #b0b0b0;
    font-size: 0.9em;
}

/* Question Block Styles */
.question-block {
    margin-bottom: 12px;
}

/* Clear Player Thin Button - Under Mixer */
.clear-player-btn-thin {
    background: transparent;
    border: 2px solid #ff4444;
    color: #ff4444;
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 0.85em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    margin-bottom: 15px;
}

.clear-player-btn-thin:hover {
    background: rgba(255, 68, 68, 0.1);
    border-color: #ff6666;
    color: #ff6666;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 68, 68, 0.2);
}

.clear-player-btn-thin:active {
    transform: translateY(0);
}

.clear-player-btn-thin .clear-icon {
    font-size: 1em;
}


.question-toggle {
    width: 100%;
    padding: 10px 12px;
    background: linear-gradient(135deg, #2c2c2c 0%, #363636 100%);
    color: #b0b0b0;
    border: 1px solid #4CAF50;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    font-weight: 500;
}

.question-toggle:hover {
    background: linear-gradient(135deg, #363636 0%, #404040 100%);
    border-color: #66BB6A;
    color: #e0e0e0;
}

.question-toggle.active {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    color: white;
    border-color: #4CAF50;
}

.question-text {
    flex: 1;
}

.toggle-icon {
    font-size: 0.75em;
    transition: transform 0.3s ease;
    margin-left: 8px;
}

.question-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

/* Options Dropdown */
.options-dropdown {
    max-height: none;
    overflow-y: visible;
    overflow-x: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease, margin-top 0.3s ease;
    opacity: 1;
    margin-top: 8px;
    scrollbar-width: thin;
    scrollbar-color: #4CAF50 #2c2c2c;
}

/* Webkit scrollbar styling */
.options-dropdown::-webkit-scrollbar {
    width: 8px;
}

.options-dropdown::-webkit-scrollbar-track {
    background: #2c2c2c;
    border-radius: 4px;
}

.options-dropdown::-webkit-scrollbar-thumb {
    background: #4CAF50;
    border-radius: 4px;
}

.options-dropdown::-webkit-scrollbar-thumb:hover {
    background: #66BB6A;
}

.options-dropdown.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    overflow: hidden;
}

/* Slim Option Buttons */
.option-btn-slim {
    width: 100%;
    padding: 12px 14px;
    margin-bottom: 6px;
    background-color: #2c2c2c;
    color: #b0b0b0;
    border: 1px solid #444;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85em;
    text-align: left;
    transition: all 0.2s ease;
    display: block;
    white-space: normal !important;
    word-wrap: break-word !important;
    word-break: break-word;
    line-height: 1.5;
    min-height: 40px;
    overflow-wrap: break-word;
}

.option-btn-slim:last-child {
    margin-bottom: 0;
}

.option-btn-slim:hover {
    background-color: #3a3a3a;
    border-color: #666;
    color: #e0e0e0;
    transform: translateX(2px);
}

.option-btn-slim.active {
    background-color: #4CAF50;
    color: white;
    border-color: #4CAF50;
    font-weight: 600;
}

/* Recommendation Display */
.recommendation {
    background-color: #2c2c2c;
    border-left: 4px solid #4CAF50;
    padding: 12px;
    margin-top: 12px;
    border-radius: 5px;
    display: none;
}

.recommendation.active {
    display: block;
}

.recommendation h4 {
    color: #4CAF50;
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 0.95em;
    text-align: left;
}

.recommendation p {
    margin: 4px 0;
    font-size: 0.85em;
    line-height: 1.4;
}

/* Apply/Link Buttons */
.apply-btn {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 12px;
    width: 100%;
    font-size: 0.95em;
    font-weight: 600;
    transition: all 0.3s ease;
}

.apply-btn:hover {
    background: linear-gradient(135deg, #66BB6A 0%, #81C784 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.5);
}

.clear-draw-btn {
    background: transparent;
    border: 2px solid #ff4444;
    color: #ff4444;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 10px;
    width: 100%;
    font-size: 0.9em;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.clear-draw-btn:hover {
    background: rgba(255, 68, 68, 0.1);
    border-color: #ff6666;
    color: #ff6666;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 68, 68, 0.2);
}

.clear-draw-btn:active {
    transform: translateY(0);
}

.clear-draw-btn .clear-icon {
    font-size: 1.1em;
}


.link-btn {
    background: linear-gradient(135deg, #2196F3 0%, #42A5F5 100%);
    color: white;
    border: 2px solid #2196F3;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 15px;
    width: 100%;
    font-size: 0.9em;
    font-weight: 600;
    transition: all 0.3s ease;
}

.link-btn:hover {
    background: linear-gradient(135deg, #42A5F5 0%, #64B5F6 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.5);
}

/* Tone Type Selector */
.tone-selector {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
}

.tone-type-btn {
    flex: 1;
    padding: 10px 8px;
    background: linear-gradient(135deg, #3a3a3a 0%, #2c2c2c 100%);
    color: #aaa;
    border: 2px solid #3a3a3a;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85em;
    transition: all 0.3s;
    text-align: center;
}

.tone-type-btn:hover {
    background: linear-gradient(135deg, #4a4a4a 0%, #3a3a3a 100%);
}

.tone-type-btn.active {
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    border-color: #4CAF50;
    color: white;
    font-weight: bold;
}

/* Fieldsets */
fieldset {
    border: 1px solid #444;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 15px;
    background-color: rgba(44, 44, 44, 0.8);
    max-height: 800px;
    overflow-y: auto;
    transition: all 0.3s ease;
    scrollbar-width: thin;
    scrollbar-color: #4CAF50 #2c2c2c;
}

/* Webkit scrollbar for fieldset */
fieldset::-webkit-scrollbar {
    width: 8px;
}

fieldset::-webkit-scrollbar-track {
    background: #2c2c2c;
    border-radius: 4px;
}

fieldset::-webkit-scrollbar-thumb {
    background: #4CAF50;
    border-radius: 4px;
}

fieldset::-webkit-scrollbar-thumb:hover {
    background: #66BB6A;
}

fieldset.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
    opacity: 0;
    border: none;
}

legend {
    color: #8BC34A;
    font-weight: bold;
    padding: 0 8px;
    font-size: 0.95em;
}

/* Timer Display */
.timer-display {
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    border: 2px solid #2196F3;
    border-radius: 8px;
    padding: 12px;
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 0 15px rgba(33, 150, 243, 0.4);
    transition: all 0.3s ease;
}

.timer-display.hidden {
    display: none;
}

.timer-icon {
    font-size: 1.8em;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.timer-text {
    font-family: 'Courier New', monospace;
    font-size: 1.8em;
    font-weight: bold;
    color: #2196F3;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(33, 150, 243, 0.5);
}

.timer-mode {
    margin-left: auto;
    font-size: 0.85em;
    color: #b0b0b0;
    font-style: italic;
}

.timer-text span {
    display: inline-block;
    min-width: 1.2em;
    text-align: center;
}


label {
    display: block;
    margin-top: 8px;
    margin-bottom: 4px;
    font-size: 0.9em;
    color: #e0e0e0;
}

input[type="number"],
select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border-radius: 4px;
    border: 1px solid #444;
    box-sizing: border-box;
    background-color: #3a3a3a;
    color: white;
    transition: all 0.3s;
    font-size: 0.9em;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: #4CAF50;
    background-color: #404040;
}

input[type="number"]:disabled {
    background-color: #2a2a2a;
    color: #666;
    cursor: not-allowed;
}

/* Duration Controls */
#durationControls {
    margin-bottom: 12px;
}

#durationControls select {
    margin-bottom: 0;
}

/* Control Button */
.control-button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
    font-weight: 600;
    box-shadow: 0 3px 12px rgba(76, 175, 80, 0.4);
}

.control-button:hover {
    background: linear-gradient(135deg, #66BB6A 0%, #81C784 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 18px rgba(76, 175, 80, 0.6);
}

/* Volume Mixer - Modern & Tight */
.volume-mixer {
    background: linear-gradient(135deg, #2c2c2c 0%, #1a1a1a 100%);
    border: 2px solid #4CAF50;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 15px;
}

.volume-mixer h4 {
    color: #8BC34A;
    margin: 0 0 10px 0;
    text-align: center;
    font-size: 1em;
}

.volume-control {
    margin-bottom: 8px;
}

.volume-control:last-child {
    margin-bottom: 0;
}

.volume-control label {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
    font-size: 0.85em;
    color: #e0e0e0;
}

.volume-icon {
    font-size: 1.1em;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 8px;
}

.volume-control input[type="range"] {
    flex: 1;
    margin: 0;
    -webkit-appearance: none;
    appearance: none;
    height: 5px;
    background: #3a3a3a;
    border-radius: 3px;
    outline: none;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(76, 175, 80, 0.5);
}

.volume-control input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, #4CAF50 0%, #66BB6A 100%);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(76, 175, 80, 0.5);
}

.volume-value {
    min-width: 38px;
    text-align: right;
    color: #2196F3;
    font-weight: 600;
    font-size: 0.85em;
}

/* Logo Footer */
.logo-footer {
    text-align: center;
    margin-top: 15px;
}

.logo-footer img {
    max-width: 60px;
    height: auto;
    opacity: 0.7;
    transition: opacity 0.3s ease-in-out;
}

.logo-footer img:hover {
    opacity: 1;
}

.logo-footer .copyright {
    margin-top: 10px;
    font-size: 0.8em;
    line-height: 1.5;
}

.logo-footer .copyright a {
    color: #888;
    text-decoration: none;
    transition: color 0.3s ease;
}

.logo-footer .copyright a:hover {
    color: #4CAF50;
}

.logo-footer h6 {
    font-size: 0.75em;
    color: #666;
    margin: 5px 0 0 0;
}

/* Footer Cache Section */
.footer-cache-section {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #333;
}

.footer-cache-btn {
    background: linear-gradient(135deg, #6b6b6b 0%, #4a4a4a 100%);
    color: #fff;
    border: 1px solid #333;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    margin-bottom: 8px;
}

.footer-cache-btn:hover {
    background: linear-gradient(135deg, #555 0%, #333 100%);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

.footer-cache-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.cache-info {
    font-size: 0.7em;
    color: #888;
    margin: 5px 0 0 0;
    font-style: italic;
}

/* Hidden Utility */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 15px;
        max-width: 100%;
    }
    
    .side-draw {
        width: 100%;
        right: -100%;
    }
    
    .icon-button {
        width: 36px;
        height: 36px;
        font-size: 1.1em;
    }
    
    h1 {
        font-size: 1.2em;
    }
}