/* HRBX MIDI Madness — ProTracker-Inspired Retro Styling */

@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&display=swap');

:root {
    --bg: #000000;
    --panel-bg: #111111;
    --panel-border: #333333;
    --text: #FF8800;
    --text-dim: #885500;
    --accent: #FFAA00;
    --highlight: #FF6600;
    --green: #00FF66;
    --cyan: #00CCCC;
    --row-highlight: rgba(255, 136, 0, 0.15);
    --selected-bg: rgba(255, 136, 0, 0.25);
    --button-bg: #222222;
    --button-hover: #333333;
    --progress-bg: #1a1a1a;
    --progress-fill: #FF8800;
    --border-light: #444444;
    --border-dark: #1a1a1a;
    --title-bg-top: #333333;
    --title-bg-bot: #1a1a1a;
    --separator: #222222;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Share Tech Mono', 'Courier New', monospace;
    font-size: 13px;
    overflow: hidden;
    height: 100vh;
}

/* CRT theme color overrides */

/* IBM 5151 Amber Phosphor */
body.theme-ibm {
    --bg: #0a0600;
    --panel-bg: #0f0a02;
    --panel-border: #2a1a00;
    --text: #FFB040;
    --text-dim: #996020;
    --accent: #FFD070;
    --highlight: #FF9800;
    --green: #FFB649;
    --cyan: #FFCC66;
    --row-highlight: rgba(255, 176, 64, 0.15);
    --selected-bg: rgba(255, 176, 64, 0.25);
    --progress-fill: #FFB040;
    --border-light: #3a2800;
    --border-dark: #0a0500;
    --title-bg-top: #2a1a00;
    --title-bg-bot: #0f0800;
    --separator: #1a1000;
}

/* Amiga Workbench */
body.theme-amiga {
    --bg: #0055AA;
    --panel-bg: #004488;
    --panel-border: #0077CC;
    --text: #FFFFFF;
    --text-dim: #99BBDD;
    --accent: #FF8800;
    --highlight: #FF6600;
    --green: #00FF66;
    --cyan: #00CCFF;
    --row-highlight: rgba(255, 136, 0, 0.2);
    --selected-bg: rgba(255, 136, 0, 0.3);
    --progress-fill: #FF8800;
    --border-light: #0099EE;
    --border-dark: #003366;
    --title-bg-top: #0066BB;
    --title-bg-bot: #003366;
    --separator: #005599;
    --button-bg: #003870;
    --button-hover: #004a90;
}

/* Apple II Green Phosphor */
body.theme-apple2 {
    --bg: #001200;
    --panel-bg: #001a00;
    --panel-border: #003300;
    --text: #33FF33;
    --text-dim: #22AA22;
    --accent: #66FF66;
    --highlight: #00CC00;
    --green: #33FF33;
    --cyan: #33FF33;
    --row-highlight: rgba(51, 255, 51, 0.12);
    --selected-bg: rgba(51, 255, 51, 0.2);
    --progress-fill: #33FF33;
    --border-light: #005500;
    --border-dark: #000a00;
    --title-bg-top: #003300;
    --title-bg-bot: #001200;
    --separator: #002200;
    --button-bg: #002200;
    --button-hover: #003300;
}

/* C64 */
body.theme-c64 {
    --bg: #40318D;
    --panel-bg: #3B2D88;
    --panel-border: #6C5EB5;
    --text: #C8C0F0;
    --text-dim: #9088C0;
    --accent: #E0D8FF;
    --highlight: #B0A8E0;
    --green: #6ABF6A;
    --cyan: #6ABFC6;
    --row-highlight: rgba(200, 192, 240, 0.12);
    --selected-bg: rgba(200, 192, 240, 0.2);
    --progress-fill: #B0A8E0;
    --border-light: #8878CC;
    --border-dark: #2D2270;
    --title-bg-top: #5548A0;
    --title-bg-bot: #3B2D88;
    --separator: #504098;
    --button-bg: #4A3C9A;
    --button-hover: #5A4CAA;
}

/* Fallout 4 Pip-Boy */
body.theme-pipboy {
    --bg: #0a1208;
    --panel-bg: #0d1a0b;
    --panel-border: #1a3316;
    --text: #1AFF80;
    --text-dim: #12AA55;
    --accent: #40FFa0;
    --highlight: #14CC66;
    --green: #1AFF80;
    --cyan: #1AFF80;
    --row-highlight: rgba(26, 255, 128, 0.12);
    --selected-bg: rgba(26, 255, 128, 0.2);
    --progress-fill: #1AFF80;
    --border-light: #245530;
    --border-dark: #081008;
    --title-bg-top: #1a3316;
    --title-bg-bot: #0d1a0b;
    --separator: #122210;
    --button-bg: #122210;
    --button-hover: #1a3316;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 8px;
    gap: 8px;
}

/* Main layout */
#main-layout {
    display: flex;
    flex: 1;
    gap: 8px;
    min-height: 0;
}

#sidebar {
    width: 260px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
}

#sidebar::-webkit-scrollbar {
    display: none;
}

#content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 0;
}

/* Panels — beveled Amiga-style */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-top-color: var(--border-light);
    border-left-color: var(--border-light);
    border-right-color: var(--border-dark);
    border-bottom-color: var(--border-dark);
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.panel-title {
    background: linear-gradient(180deg, var(--title-bg-top) 0%, var(--title-bg-bot) 100%);
    padding: 3px 8px;
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--accent);
    border-bottom: 1px solid var(--panel-border);
    flex-shrink: 0;
}

/* File list */
#file-list-panel {
    flex: 1;
    min-height: 0;
}

#file-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px;
    min-height: 0;
}

#file-list::-webkit-scrollbar {
    width: 8px;
}

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

#file-list::-webkit-scrollbar-thumb {
    background: var(--panel-border);
}

.file-item {
    padding: 4px 6px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-dark);
}

.file-item:hover {
    background: var(--row-highlight);
}

.file-item.selected {
    background: var(--selected-bg);
    color: var(--accent);
}

.file-item .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.file-item .delete-btn {
    color: #660000;
    cursor: pointer;
    padding: 0 4px;
    font-size: 11px;
}

.file-item .delete-btn:hover {
    color: #FF0000;
}

/* Upload */
#upload-area {
    padding: 6px;
    border-top: 1px solid var(--panel-border);
    flex-shrink: 0;
}

.upload-btn {
    display: block;
    text-align: center;
    padding: 6px;
    background: var(--button-bg);
    border: 1px solid var(--panel-border);
    color: var(--text);
    cursor: pointer;
    letter-spacing: 1px;
    font-family: inherit;
    font-size: 11px;
}

.upload-btn:hover {
    background: var(--button-hover);
    color: var(--accent);
}

/* Controls / Keys panel */
#keys-panel {
    flex-shrink: 0;
}

#keys-list {
    padding: 8px;
}

.key-row {
    padding: 3px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text);
}

.key-row kbd {
    background: var(--button-bg);
    border: 1px solid var(--panel-border);
    border-top-color: var(--border-light);
    border-left-color: var(--border-light);
    padding: 2px 6px;
    font-family: inherit;
    font-size: 11px;
    color: var(--accent);
    min-width: 42px;
    text-align: center;
}

.status-value {
    color: var(--accent);
    font-weight: bold;
}

/* Theme panel */
#theme-name {
    padding: 4px 6px;
    font-size: 11px;
    color: var(--accent);
    text-align: center;
    letter-spacing: 1px;
}

/* File info */
#file-info {
    padding: 6px;
}

.info-row {
    padding: 2px 0;
    display: flex;
    gap: 6px;
}

.info-row .label {
    color: var(--text-dim);
    min-width: 60px;
}

#info-instruments {
    margin-top: 6px;
    padding-top: 4px;
    border-top: 1px solid var(--separator);
}

.instrument-item {
    color: var(--cyan);
    font-size: 11px;
    padding: 1px 0;
}

/* Tracker display */
#tracker-panel {
    flex: 1;
    min-height: 0;
}

#tracker-canvas-wrapper {
    position: relative;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

#tracker-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
}

/* Bottom row */
#bottom-row {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    height: 140px;
}

#transport-panel {
    flex: 1;
}

#scope-panel {
    width: 320px;
}

/* Transport */
#transport {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    flex: 1;
}

.transport-btn {
    background: var(--button-bg);
    border: 1px solid var(--panel-border);
    border-top-color: var(--border-light);
    border-left-color: var(--border-light);
    color: var(--text);
    padding: 8px 16px;
    cursor: pointer;
    font-family: inherit;
    font-size: 12px;
    letter-spacing: 1px;
    min-width: 90px;
    text-align: center;
}

.transport-btn:hover {
    background: var(--button-hover);
    color: var(--accent);
}

.transport-btn:active {
    border-top-color: var(--border-dark);
    border-left-color: var(--border-dark);
    border-right-color: var(--border-light);
    border-bottom-color: var(--border-light);
}

#progress-container {
    flex: 1;
    background: var(--progress-bg);
    border: 1px solid var(--separator);
    height: 20px;
    position: relative;
    overflow: hidden;
}

#progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--progress-fill), var(--highlight));
    transition: width 0.1s linear;
}

#progress-time {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 10px;
    color: var(--text);
    text-shadow: 0 0 4px rgba(0,0,0,0.8);
}

/* Oscilloscope / Spectrum Analyzer */
#scope-canvas {
    width: 100%;
    flex: 1;
    background: transparent;
}

/* Autoplay unlock prompt */
#autoplay-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9500;
    cursor: pointer;
}

.autoplay-prompt {
    font-size: 14px;
    color: var(--accent);
    letter-spacing: 3px;
    padding: 10px 24px;
    border: 1px solid var(--panel-border);
    background: var(--panel-bg);
    animation: pulse 2s ease-in-out infinite;
}

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

/* Loading overlay */
#loading-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.loading-text {
    font-size: 18px;
    color: var(--accent);
    letter-spacing: 4px;
    animation: blink 1s step-end infinite;
}

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

/* VU meters */
.vu-container {
    display: flex;
    gap: 2px;
    padding: 4px;
    align-items: flex-end;
    height: 60px;
}

.vu-bar {
    width: 12px;
    background: var(--green);
    min-height: 2px;
    transition: height 0.08s linear;
}

.vu-bar.hot {
    background: var(--highlight);
}

/* Display panel / DPR controls */
#display-controls {
    padding: 6px;
}

.dpr-row {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 0;
    font-size: 11px;
}

.dpr-row .label {
    color: var(--text-dim);
    min-width: 32px;
}

.dpr-btn {
    background: var(--button-bg);
    border: 1px solid var(--panel-border);
    border-top-color: var(--border-light);
    border-left-color: var(--border-light);
    border-right-color: var(--border-dark);
    border-bottom-color: var(--border-dark);
    color: var(--text);
    padding: 2px 6px;
    cursor: pointer;
    font-family: inherit;
    font-size: 10px;
    letter-spacing: 1px;
}

.dpr-btn:hover {
    background: var(--button-hover);
    color: var(--accent);
}

.dpr-btn:active {
    border-top-color: var(--border-dark);
    border-left-color: var(--border-dark);
    border-right-color: var(--border-light);
    border-bottom-color: var(--border-light);
}

.dpr-btn.active {
    background: var(--accent);
    color: var(--bg);
    border-top-color: var(--border-dark);
    border-left-color: var(--border-dark);
    border-right-color: var(--border-light);
    border-bottom-color: var(--border-light);
}

#dpr-resolution {
    color: var(--accent);
    font-size: 10px;
    letter-spacing: 1px;
}

/* FPS counter */
#fps-counter {
    font-family: 'Share Tech Mono', monospace;
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 1px;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ═══════ Mobile touch control bar (hidden on desktop) ═══════ */
#mobile-controls {
    display: none;
    gap: 4px;
    padding: 4px;
    flex-shrink: 0;
}

#mobile-controls .touch-btn {
    flex: 1;
    padding: 10px 2px;
    background: var(--button-bg);
    border: 1px solid var(--panel-border);
    color: var(--text);
    font-family: inherit;
    font-size: 11px;
    letter-spacing: 1px;
    text-align: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

#mobile-controls .touch-btn:active {
    background: var(--button-hover);
    color: var(--accent);
}

#mobile-controls .touch-btn.play-btn {
    flex: 2;
}

/* ═══════ Tablet / small desktop (≤768px) ═══════ */
@media (max-width: 768px) {
    body {
        overflow-y: auto;
        height: auto;
    }

    #app {
        height: auto;
        min-height: 100dvh;
        padding: 4px;
    }

    #main-layout {
        flex-direction: column;
    }

    /* Sidebar: collapsed by default, toggled via .open */
    #sidebar {
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    #sidebar.open {
        max-height: 80vh;
        overflow-y: auto;
    }

    /* Replace keyboard/theme panels with touch buttons */
    #keys-panel,
    #theme-panel {
        display: none;
    }

    #file-list-panel {
        max-height: 200px;
    }

    #file-list {
        max-height: 160px;
    }

    /* Content fills width */
    #content {
        width: 100%;
    }

    /* Bottom row stacks vertically */
    #bottom-row {
        flex-direction: column;
        height: auto;
    }

    /* Scope: hidden by default on mobile, toggled via .mobile-visible */
    #scope-panel {
        width: 100%;
        height: 80px;
        display: none;
    }

    #scope-panel.mobile-visible {
        display: flex;
    }

    /* Show mobile controls */
    #mobile-controls {
        display: flex;
    }

    /* Larger touch targets for transport */
    .transport-btn {
        padding: 10px 12px;
    }

    /* Progress bar full width */
    #transport {
        flex-wrap: wrap;
    }

    #progress-container {
        flex-basis: 100%;
        height: 24px;
    }

    /* CRT canvas uses dvh for mobile address-bar-safe sizing */
    #crt-canvas {
        height: 100dvh !important;
    }
}

/* ═══════ Small phone (≤480px) ═══════ */
@media (max-width: 480px) {
    #app {
        padding: 2px;
        gap: 4px;
    }

    #main-layout {
        gap: 4px;
    }

    .panel-title {
        font-size: 9px;
        padding: 2px 6px;
    }

    /* Hide file info and display panels on very small screens */
    #file-info-panel,
    #display-panel {
        display: none;
    }

    /* Larger tap targets for file items */
    .file-item {
        padding: 8px 6px;
    }

    .transport-btn {
        padding: 8px 8px;
        font-size: 11px;
    }

    #mobile-controls .touch-btn {
        font-size: 9px;
        padding: 8px 1px;
        letter-spacing: 0px;
    }
}