/* Main stylesheet - imports all component styles */
@import './variables.css';
@import './components/knobs.css';
@import './components/keyboard.css';
@import './components/module-panel.css';
@import './components/visualizer.css';
@import './components/effects-panel.css';
@import './components/arpeggiator-panel.css';
@import './components/scale-panel.css';
@import './components/recorder.css';
@import './components/sequencer-panel.css';
@import './components/midi-panel.css';
@import './components/view-modes.css';
@import './components/preset-browser.css';
@import './components/tooltips.css';
@import './components/context-menu.css';
@import './components/modulation-zone.css';

/* Reset and base styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* App container */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Start overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    cursor: pointer;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    animation: pulse 2s ease-in-out infinite;
}

.overlay-content h1 {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
    text-shadow: 0 0 20px var(--accent-glow);
}

.overlay-content p {
    color: var(--text-secondary);
    font-size: var(--text-lg);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Main synth container */
#synth-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-md);
    max-width: var(--container-max-width);
    margin: 0 auto;
    width: 100%;
}

#synth-container.hidden {
    display: none;
}

/* Header */
.synth-header {
    display: grid;
    grid-template-columns: auto auto 1fr auto auto auto;
    align-items: center;
    gap: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--space-md);
}

/* Header with integrated quick actions */
.synth-header .header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Header secondary row for additional controls */
.header-secondary {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-sm);
}

.synth-header h1 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--accent-primary);
}

.master-controls {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.voice-indicator {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
}

.preset-controls {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Buttons */
.btn {
    padding: var(--space-sm) var(--space-md);
    background: var(--btn-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition:
        background var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform 150ms cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform;
}

.btn:hover {
    background: var(--btn-hover);
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px var(--accent-glow);
}

.btn:active {
    transform: scale(0.95);
    transition: transform 50ms cubic-bezier(0.22, 1, 0.36, 1);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

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

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

.btn-icon {
    padding: var(--space-sm);
    min-width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon .icon {
    font-size: 1.125rem;
    line-height: 1;
}

.btn-sm {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--text-xs);
}

/* Active/Toggle button state */
.btn.active,
.btn-toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

.btn.active:hover,
.btn-toggle.active:hover {
    background: color-mix(in srgb, var(--accent-primary) 85%, white);
    box-shadow: 0 0 16px var(--accent-glow);
}

/* Primary/Accent button variant */
.btn-primary {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: color-mix(in srgb, var(--accent-primary) 85%, white);
}

/* Undo/Redo controls */
.undo-controls {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.undo-controls .btn-icon:disabled {
    opacity: 0.3;
}

.undo-controls .btn-icon:not(:disabled):hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* Select elements */
select {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
    min-width: 120px;
    outline: none;
}

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

select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Labels */
label {
    display: block;
    font-size: var(--text-xs);
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Modules container - mobile first approach */
.modules-container {
    display: grid;
    grid-template-columns: 1fr;  /* Mobile: single column */
    gap: var(--module-gap);
    margin-bottom: var(--space-lg);
    position: relative;
}

/* Tablet: 2x2 grid */
@media (min-width: 600px) {
    .modules-container {
        grid-template-columns: repeat(2, 1fr);
        grid-template-areas:
            "osc osc"
            "vcf vca"
            "mod mod"
            "effects effects"
            "seq seq";
    }

    /* Grid area assignments for tablet */
    #oscillators-panel { grid-area: osc; }
    #vcf-panel { grid-area: vcf; }
    #vca-panel { grid-area: vca; }
    .modulation-zone { grid-area: mod; }
    #effects-panel { grid-area: effects; }
    #sequencer-panel { grid-area: seq; }

    /* Effects panel spans full width */
    .module-panel--wide {
        grid-column: 1 / -1;
    }
}

/* Desktop: 4-column signal flow layout */
@media (min-width: 1000px) {
    .modules-container {
        grid-template-columns: repeat(4, 1fr);
        grid-template-areas:
            "osc vcf vca mod"
            "effects effects effects effects"
            "seq seq seq seq";
        align-items: stretch;
    }

    /* Grid area assignments */
    #oscillators-panel { grid-area: osc; }
    #vcf-panel { grid-area: vcf; }
    #vca-panel { grid-area: vca; }
    .modulation-zone { grid-area: mod; }
    #effects-panel { grid-area: effects; }
    #sequencer-panel { grid-area: seq; }

    /* Ensure proper spanning */
    .module-panel--wide {
        grid-column: auto;
    }
}

/* Large desktop: same layout with more space */
@media (min-width: 1400px) {
    .modules-container {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-lg);
    }
}

/* Keyboard section */
.keyboard-section {
    margin-top: auto;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.keyboard-info {
    text-align: center;
    margin-top: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--text-muted);
}

/* Control group */
.control-group {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Envelope display container */
.envelope-display-container {
    margin-top: var(--space-md);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

#envelope-display {
    display: block;
    width: 100%;
    height: auto;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #synth-container {
        padding: var(--space-sm);
    }

    .synth-header {
        display: flex;
        flex-direction: column;
        gap: var(--space-sm);
        align-items: stretch;
    }

    .synth-header > *:not(.header-secondary) {
        display: flex;
        justify-content: center;
    }

    .synth-header h1 {
        font-size: var(--text-lg);
        margin: 0;
        text-align: center;
    }

    .header-actions {
        justify-content: center;
    }

    .header-visualizer {
        justify-content: center;
    }

    .preset-controls {
        flex-wrap: wrap;
        justify-content: center;
    }

    .preset-controls select {
        min-width: 100px;
        font-size: var(--text-xs);
    }

    .preset-controls .btn {
        font-size: var(--text-xs);
        padding: var(--space-xs) var(--space-sm);
    }

    .header-secondary {
        padding-top: var(--space-xs);
        gap: var(--space-sm);
    }
}

/* Extra small mobile adjustments */
@media (max-width: 480px) {
    .synth-header h1 {
        font-size: var(--text-base);
    }

    .view-mode-btn {
        padding: 2px 6px;
        font-size: 10px;
    }

    .header-actions .btn {
        padding: var(--space-xs);
    }

    .header-secondary {
        gap: var(--space-xs);
    }
}

/* ========================================
   Quick Actions Toolbar
   ======================================== */

.quick-actions-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.quick-action {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--btn-bg);
}

.quick-action:hover {
    background: var(--btn-hover);
}

.quick-action-icon {
    font-size: var(--text-base);
    line-height: 1;
}

.quick-action-label {
    font-size: var(--text-xs);
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 var(--space-xs);
}

/* A/B Compare active state */
#ab-compare-btn.active {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
    color: white;
}

#ab-compare-btn .quick-action-icon {
    font-weight: bold;
    font-size: var(--text-sm);
}

/* Mobile: stack quick actions */
@media (max-width: 600px) {
    .quick-actions-toolbar {
        justify-content: center;
    }

    .quick-action-label {
        display: none;
    }

    .quick-action {
        padding: var(--space-sm);
    }

    .toolbar-divider {
        display: none;
    }
}

/* ========================================
   Keyboard Shortcuts Modal
   ======================================== */

.shortcuts-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.shortcuts-modal-backdrop.open {
    opacity: 1;
    visibility: visible;
}

.shortcuts-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.shortcuts-modal-backdrop.open .shortcuts-modal {
    transform: translateY(0) scale(1);
}

.shortcuts-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
}

.shortcuts-modal-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--accent-primary);
    margin: 0;
}

.shortcuts-modal-close {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    transition: all var(--transition-fast);
}

.shortcuts-modal-close:hover {
    border-color: var(--btn-danger);
    color: var(--btn-danger);
}

.shortcuts-modal-content {
    padding: var(--space-md);
}

.shortcuts-group {
    margin-bottom: var(--space-lg);
}

.shortcuts-group:last-child {
    margin-bottom: 0;
}

.shortcuts-group-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--border-color);
}

.shortcut-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xs) 0;
}

.shortcut-desc {
    color: var(--text-primary);
    font-size: var(--text-sm);
}

.shortcut-keys {
    display: flex;
    gap: var(--space-xs);
}

.shortcut-keys kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    font-size: var(--text-xs);
    font-family: var(--font-mono);
    color: var(--text-secondary);
    min-width: 24px;
    text-align: center;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Accessibility: Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Accessibility: Visible focus states */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.btn:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.knob:focus-visible {
    outline: none;
}

.knob:focus-visible .knob-body {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
    box-shadow: var(--shadow-glow);
}

/* Accessibility: High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #666666;
        --text-secondary: #cccccc;
        --text-muted: #999999;
    }

    .module-panel {
        border-width: 2px;
    }

    .knob-body {
        border-width: 3px;
    }
}

/* ========================================
   Loading States
   ======================================== */

.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
    z-index: 10;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ========================================
   Error States
   ======================================== */

.error-state {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--btn-danger);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--btn-danger);
    text-align: center;
}

.error-state-icon {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-sm);
}

.error-state-message {
    font-size: var(--text-sm);
    margin-bottom: var(--space-md);
}

.error-state-action {
    background: var(--btn-danger);
    color: white;
    border: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--text-sm);
    transition: background var(--transition-fast);
}

.error-state-action:hover {
    background: #dc2626;
}

/* Input error state */
input.error,
select.error {
    border-color: var(--btn-danger);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

/* ========================================
   Success States
   ======================================== */

.success-state {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--module-vca);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: var(--module-vca);
    text-align: center;
}

/* ========================================
   Skeleton Loading
   ======================================== */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 25%,
        var(--bg-secondary) 50%,
        var(--bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ========================================
   Final Polish - Consistent Spacing
   ======================================== */

/* Module spacing consistency */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--module-min-width), 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

/* Consistent control group spacing */
.control-group {
    margin-bottom: var(--space-sm);
}

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

/* Smooth transitions for interactive elements */
.btn,
.knob,
.module-panel,
select,
input {
    transition:
        background var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

/* Subtle text shadow for better readability on dark backgrounds */
.module-title,
.synth-header h1 {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}