/* OS/2 Warp 3.0 Theme - CSS Variables */
:root {
    /* OS/2 Warp Classic Colors */
    --os2-purple: #7B3294;
    --os2-purple-dark: #5C2470;
    --os2-purple-light: #9B52B4;
    --os2-window-bg: #C0C0C0;
    --os2-desktop-bg: #008080;
    --os2-desktop-pattern: #006666;

    /* 3D Border Colors */
    --os2-border-light: #FFFFFF;
    --os2-border-midlight: #DFDFDF;
    --os2-border-middark: #808080;
    --os2-border-dark: #000000;
    --os2-border-shadow: #404040;

    /* UI Element Colors */
    --os2-button-face: #C0C0C0;
    --os2-button-text: #000000;
    --os2-button-disabled: #808080;
    --os2-text-primary: #000000;
    --os2-text-inverse: #FFFFFF;
    --os2-selection-bg: #000080;
    --os2-selection-text: #FFFFFF;

    /* Workspace Colors */
    --os2-workspace-bg: #FFFFFF;
    --os2-status-bg: #C0C0C0;
    --os2-menu-bg: #C0C0C0;

    /* Typography */
    --os2-font-system: "System", -apple-system, "Helvetica", "Arial", sans-serif;
    --os2-font-mono: "Courier New", "Courier", monospace;

    /* Spacing */
    --os2-border-width: 2px;
    --os2-titlebar-height: 28px;
    --os2-button-padding: 4px 12px;
}

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

body {
    font-family: var(--os2-font-system);
    line-height: 1.4;
    color: var(--os2-text-primary);
    background-color: var(--os2-desktop-bg);
    background-image:
        repeating-linear-gradient(
            45deg,
            var(--os2-desktop-bg) 0px,
            var(--os2-desktop-bg) 2px,
            var(--os2-desktop-pattern) 2px,
            var(--os2-desktop-pattern) 4px
        );
    min-height: 100vh;
}

/* OS/2 Window Chrome Mixin */
.os2-window {
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark);
}

.os2-window-inset {
    background-color: var(--os2-workspace-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
}

/* OS/2 Title Bar */
.os2-titlebar {
    background: linear-gradient(180deg, var(--os2-purple-light) 0%, var(--os2-purple) 50%, var(--os2-purple-dark) 100%);
    color: var(--os2-text-inverse);
    height: var(--os2-titlebar-height);
    display: flex;
    align-items: center;
    padding: 0 8px;
    font-weight: bold;
    font-size: 14px;
    border-bottom: 2px solid var(--os2-border-dark);
    text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.5);
    gap: 8px;
}

.os2-titlebar .btn {
    color: var(--os2-text-primary);
    background-color: var(--os2-button-face);
}

/* Header styles */
.header {
    background-color: var(--os2-window-bg);
    color: var(--os2-text-primary);
    text-align: center;
    padding: 0;
    margin: 20px auto;
    max-width: 800px;
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                4px 4px 0 rgba(0, 0, 0, 0.3);
}

.header .os2-titlebar {
    margin: 0;
}

.header-content {
    padding: 20px 16px;
    background-color: var(--os2-window-bg);
}

.header h1 {
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--os2-text-primary);
}

.header p {
    font-size: 12px;
    color: var(--os2-text-primary);
    margin-bottom: 12px;
}

.header nav {
    margin-top: 12px;
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* Container styles */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* OS/2 Button styles */
.btn {
    background-color: var(--os2-button-face);
    color: var(--os2-button-text);
    padding: var(--os2-button-padding);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark);
    cursor: pointer;
    font-size: 12px;
    font-family: var(--os2-font-system);
    font-weight: bold;
    text-decoration: none;
    display: inline-block;
    min-width: 80px;
    text-align: center;
    transition: none;
}

.btn:hover {
    background-color: var(--os2-border-midlight);
}

.btn:active {
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
    padding: 5px 11px 3px 13px;
}

.btn-secondary {
    background-color: var(--os2-button-face);
}

.btn-secondary:hover {
    background-color: var(--os2-border-midlight);
}

/* Form styles */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 500px;
    margin: 20px auto;
    padding: 16px;
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                4px 4px 0 rgba(0, 0, 0, 0.3);
}

.file-input {
    padding: 4px;
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
    font-size: 12px;
    font-family: var(--os2-font-system);
    background-color: var(--os2-workspace-bg);
}

/* Mindmap container */
.mindmap-container {
    width: 100%;
    height: calc(100vh - 200px);
    min-height: 400px;
    background-color: var(--os2-workspace-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
    overflow: auto;
}

/* Mindmap wrapper window */
.mindmap-window {
    margin: 20px auto;
    max-width: 98%;
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                4px 4px 0 rgba(0, 0, 0, 0.3);
}

/* Full screen mode */
.mindmap-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    margin: 0;
    max-width: 100%;
    z-index: 9999;
}

.mindmap-fullscreen .mindmap-container {
    height: calc(100vh - 68px);
}

.mindmap-fullscreen .orientation-controls {
    top: 36px;
}

/* Table styles */
.mindmap-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 12px;
}

.mindmap-table th,
.mindmap-table td {
    padding: 6px 8px;
    border: 1px solid var(--os2-border-middark);
    text-align: left;
}

.mindmap-table th {
    background: linear-gradient(180deg, var(--os2-purple-light) 0%, var(--os2-purple) 50%, var(--os2-purple-dark) 100%);
    color: var(--os2-text-inverse);
    font-weight: bold;
    border-color: var(--os2-border-dark);
}

.mindmap-table tr {
    background-color: var(--os2-workspace-bg);
}

.mindmap-table tr:nth-child(even) {
    background-color: var(--os2-window-bg);
}

.mindmap-table tr:hover {
    background-color: var(--os2-border-midlight);
}

.mindmap-table .btn {
    padding: 2px 8px;
    min-width: 60px;
    font-size: 11px;
}

/* Table wrapper */
.table-window {
    margin: 20px auto;
    max-width: 95%;
    padding: 12px;
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                4px 4px 0 rgba(0, 0, 0, 0.3);
}

/* Progress bar styles */
.progress-container {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    max-width: 90vw;
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                4px 4px 0 rgba(0, 0, 0, 0.5);
    z-index: 1001;
    display: none;
    padding: 4px;
}

.progress-bar-container {
    margin: 8px;
    padding: 2px;
    background-color: var(--os2-workspace-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
}

@keyframes progress-stripes {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 40px 0;
    }
}

.progress-bar {
    height: 24px;
    background: linear-gradient(180deg, #0000AA 0%, #0000CC 50%, #000088 100%);
    background-size: 100% 100%;
    width: 0%;
    transition: width 0.3s ease-out;
    position: relative;
    overflow: hidden;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: repeating-linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.1) 0px,
        rgba(255, 255, 255, 0.1) 10px,
        transparent 10px,
        transparent 20px
    );
    animation: progress-stripes 1s linear infinite;
}

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

.progress-text {
    text-align: center;
    padding: 10px 8px;
    font-size: 13px;
    color: var(--os2-text-primary);
    font-family: var(--os2-font-system);
    font-weight: bold;
    animation: progress-pulse 2s ease-in-out infinite;
    line-height: 1.4;
}

/* Popup/Dialog styles */
.popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--os2-window-bg);
    padding: 0;
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                6px 6px 0 rgba(0, 0, 0, 0.5);
    z-index: 1000;
    min-width: 400px;
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
}

.popup-content {
    padding: 0;
    overflow: auto;
    max-height: calc(80vh - 60px);
}

.popup a {
    color: #0000AA;
    text-decoration: underline;
}

.popup a:hover {
    color: #0000FF;
}

.popup a:visited {
    color: #551A8B;
}

.popup .close-btn {
    background-color: var(--os2-button-face);
    color: var(--os2-button-text);
    padding: var(--os2-button-padding);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark);
    cursor: pointer;
    font-weight: bold;
    font-family: var(--os2-font-system);
    font-size: 12px;
    margin-top: 12px;
    min-width: 80px;
}

.popup .close-btn:hover {
    background-color: var(--os2-border-midlight);
}

.popup .close-btn:active {
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
}

/* Status Bar */
.os2-statusbar {
    background-color: var(--os2-status-bg);
    border-top: 2px solid var(--os2-border-light);
    padding: 4px 8px;
    font-size: 11px;
    display: flex;
    align-items: center;
    height: 24px;
}

/* Orientation Controls */
.orientation-controls {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: var(--os2-border-width);
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight),
                inset -1px -1px 0 var(--os2-border-middark),
                2px 2px 0 rgba(0, 0, 0, 0.3);
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 100;
}

.orientation-controls label {
    font-family: var(--os2-font-system);
    font-size: 11px;
    font-weight: bold;
    color: var(--os2-text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
}

/* OS/2 Style Checkbox */
.os2-checkbox {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 16px;
    height: 16px;
    background-color: var(--os2-workspace-bg);
    border-style: solid;
    border-width: 2px;
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
    cursor: pointer;
    position: relative;
    margin: 0;
}

.os2-checkbox:checked::before {
    content: '✓';
    position: absolute;
    top: -3px;
    left: 1px;
    font-size: 14px;
    font-weight: bold;
    color: var(--os2-text-primary);
}

.os2-checkbox:focus {
    outline: 1px dotted var(--os2-text-primary);
    outline-offset: 2px;
}

/* OS/2 Radio Button */
.os2-radio {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--os2-workspace-bg);
    border-style: solid;
    border-width: 2px;
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
    box-shadow: inset -1px -1px 0 var(--os2-border-midlight),
                inset 1px 1px 0 var(--os2-border-shadow);
    cursor: pointer;
    position: relative;
    margin: 0;
}

.os2-radio:checked::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--os2-text-primary);
}

.os2-radio:focus {
    outline: 1px dotted var(--os2-text-primary);
    outline-offset: 2px;
}

/* Orientation icon labels */
.orientation-label {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Responsive design */
@media (max-width: 1024px) {
    .header h1 {
        font-size: 20px;
    }

    .header p {
        font-size: 11px;
    }

    .mindmap-container {
        height: 450px;
    }

    .progress-container {
        width: 70%;
    }
}

@media (max-width: 768px) {
    .header {
        margin: 10px;
    }

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

    .header h1 {
        font-size: 18px;
    }

    .header nav {
        flex-direction: column;
        gap: 6px;
    }

    .container {
        padding: 0 10px;
    }

    .upload-form {
        max-width: 100%;
        margin: 10px;
    }

    .mindmap-container {
        height: 400px;
        min-height: 300px;
    }

    .mindmap-table {
        font-size: 11px;
    }

    .popup {
        max-width: 95%;
        min-width: 250px;
    }

    .progress-container {
        width: 80%;
    }

    .orientation-controls {
        top: 6px;
        right: 6px;
        padding: 6px 8px;
        gap: 6px;
    }

    .orientation-controls label {
        font-size: 10px;
        gap: 4px;
    }
}

@media (max-width: 480px) {
    .header {
        margin: 5px;
    }

    .header-content {
        padding: 12px 8px;
    }

    .header h1 {
        font-size: 16px;
    }

    .header p {
        font-size: 10px;
    }

    .btn {
        padding: 3px 10px;
        font-size: 11px;
        min-width: 70px;
    }

    .mindmap-container {
        height: 350px;
        min-height: 250px;
    }

    .mindmap-table th,
    .mindmap-table td {
        padding: 4px 6px;
        font-size: 10px;
    }

    .mindmap-table .btn {
        padding: 2px 6px;
        font-size: 10px;
        min-width: 50px;
    }

    .progress-container {
        width: 90%;
    }

    .progress-text {
        font-size: 11px;
    }

    .orientation-controls {
        position: relative;
        top: auto;
        right: auto;
        margin: 10px auto;
        width: fit-content;
        padding: 6px 10px;
        flex-direction: column;
        gap: 8px;
    }

    .orientation-controls label {
        font-size: 11px;
    }
}

/* Accessibility - but keep OS/2 aesthetic */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* OS/2 Classic Scrollbars */
::-webkit-scrollbar {
    width: 16px;
    height: 16px;
}

::-webkit-scrollbar-track {
    background-color: var(--os2-window-bg);
    border-style: solid;
    border-width: 1px;
    border-color: var(--os2-border-dark) var(--os2-border-light) var(--os2-border-light) var(--os2-border-dark);
}

::-webkit-scrollbar-thumb {
    background-color: var(--os2-button-face);
    border-style: solid;
    border-width: 2px;
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    box-shadow: inset 1px 1px 0 var(--os2-border-midlight);
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--os2-border-midlight);
}

::-webkit-scrollbar-button {
    background-color: var(--os2-button-face);
    border-style: solid;
    border-width: 2px;
    border-color: var(--os2-border-light) var(--os2-border-dark) var(--os2-border-dark) var(--os2-border-light);
    height: 16px;
    width: 16px;
}

::-webkit-scrollbar-button:hover {
    background-color: var(--os2-border-midlight);
}

/* Selection styling */
::selection {
    background-color: var(--os2-selection-bg);
    color: var(--os2-selection-text);
}

::-moz-selection {
    background-color: var(--os2-selection-bg);
    color: var(--os2-selection-text);
}