/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
    /* Colors - Primary */
    --color-primary: #007bff;
    --color-primary-hover: #0056b3;
    --color-primary-light: #2563eb;
    --color-primary-alpha: rgba(37, 99, 235, 0.15);

    /* Colors - Secondary */
    --color-secondary-bg: #f3f4f6;
    --color-secondary-text: #374151;
    --color-secondary-border: #d1d5db;
    --color-secondary-hover: #e5e7eb;

    /* Colors - Danger */
    --color-danger: #dc3545;
    --color-danger-hover: #c82333;
    --color-danger-light: #fee2e2;
    --color-danger-text: #ef4444;

    /* Colors - Success */
    --color-success: #28a745;
    --color-success-hover: #218838;

    /* Colors - UI */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f9fafb;
    --color-bg-card: #f3f4f6;
    --color-bg-header: #f0f2f5;
    --color-text: #333;
    --color-text-primary: #111827;
    --color-text-secondary: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-light: #495057;
    --color-border: #eaeaea;
    --color-border-light: #e5e7eb;
    --color-border-medium: #ccc;
    --color-border-dark: #9ca3af;
    --color-warning: #f0ad4e;
    --color-modal-overlay: rgba(0, 0, 0, 0.8);

    /* Scrollbar Colors */
    --scrollbar-bg: #f8f9fa;
    --scrollbar-thumb: #c1c1c1;
    --scrollbar-thumb-hover: #a8a8a8;
    --scrollbar-track: #f1f1f1;

    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-family-mono: 'Consolas', 'Courier New', monospace;
    --font-size-base: 14px;
    --font-size-sm: 0.9rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.1rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.4rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-base: 1.5;

    /* Spacing */
    --spacing-xs: 2px;
    --spacing-sm: 3px;
    --spacing-md: 5px;
    --spacing-lg: 8px;
    --spacing-xl: 10px;
    --spacing-xxl: 12px;
    --spacing-section: 0.75rem;
    --spacing-section-lg: 1rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 10px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 10px 30px rgba(0, 0, 0, 0.15);
    --shadow-modal: 0 15px 40px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 2px 8px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-fast: 0.1s;
    --transition-base: 0.2s;
    --transition-slow: 0.3s;

    /* Image Heights */
    --item-height: 120px;
    --item-height-mobile: 80px;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    padding: var(--spacing-lg);
    margin: 0;
    font-size: var(--font-size-base);
}

body.modal-open {
    overflow: hidden !important;
}

body.modal-open #master-scrollbar-container {
    display: none !important;
}

/* ==========================================================================
   Scrollbar Styles
   ========================================================================== */
#master-scrollbar-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 12px;
    background: var(--scrollbar-bg);
    border-top: 1px solid var(--color-border-medium);
    overflow-x: auto;
    overflow-y: hidden;
    z-index: 9999;
}

#master-scrollbar-container::-webkit-scrollbar {
    height: 10px;
}

#master-scrollbar-container::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 5px;
    border: 2px solid var(--scrollbar-bg);
}

#master-scrollbar-container::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

#master-scrollbar-spacer {
    height: 1px;
    width: 0px;
    visibility: hidden;
}

/* ==========================================================================
   Header Styles
   ========================================================================== */
.header-compact {
    display: flex;
    align-items: center;
    gap: var(--spacing-xxl);
    padding: 5px var(--spacing-lg);
    background: var(--color-bg-header);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
}

.header-compact h2 {
    margin: 0;
    font-size: var(--font-size-xl);
    color: var(--color-text);
    white-space: nowrap;
    padding-right: var(--spacing-xxl);
    border-right: 1px solid var(--color-border-medium);
}

.header-compact #status {
    margin: 0;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-warning);
    white-space: nowrap;
    padding-left: 0;
}

.header-compact .controls-inline {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    margin-left: auto;
}

.header-buttons {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

/* ==========================================================================
   Button Styles
   ========================================================================== */

/* Base Button Styles */
.btn-primary,
.btn-secondary {
    padding: 0 var(--spacing-xl);
    height: 32px;
    line-height: 1;
    cursor: pointer;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-medium);
    transition: background var(--transition-base), transform var(--transition-fast);
    box-shadow: var(--shadow-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    vertical-align: middle;
    font-size: var(--font-size-base);
    gap: 6px;
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

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

.btn-primary.small {
    font-size: var(--font-size-sm);
    padding: 6px 16px;
}

/* Secondary Button */
.btn-secondary {
    background-color: var(--color-secondary-bg);
    color: var(--color-secondary-text);
    border: 1px solid var(--color-secondary-border);
    box-shadow: none;
}

.btn-secondary:hover {
    background-color: var(--color-secondary-hover);
    color: var(--color-text-primary);
    transform: translateY(-1px);
}

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

/* Disabled Buttons */
.btn-primary:disabled,
.btn-secondary:disabled {
    background-color: #e9ecef;
    color: #adb5bd;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    border-color: transparent;
}

/* Danger Button */
.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background-color: var(--color-danger-hover);
    transform: translateY(-1px);
}

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

/* Upload Button */
.btn-upload {
    position: relative;
    overflow: hidden;
    background-color: var(--color-success) !important;
}

.btn-upload:hover {
    background-color: var(--color-success-hover) !important;
}

.btn-upload input[type="file"] {
    position: absolute;
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    z-index: -1;
}

/* Add Step Button */
.btn-add-main {
    width: 100%;
    padding: var(--spacing-xl);
    background-color: var(--color-bg);
    border: 2px dashed var(--color-secondary-border);
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.btn-add-main span {
    font-size: var(--font-size-xxl);
    line-height: 1;
}

.btn-add-main:hover {
    background-color: var(--color-bg-tertiary);
    border-color: #3b82f6;
    color: #3b82f6;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-add-main:active {
    transform: translateY(0);
}

/* ==========================================================================
   Pipeline & Step Styles
   ========================================================================== */
#pipeline-container {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.add-step-container {
    padding: var(--spacing-xs) 7px;
    margin-top: 5px;
    margin-bottom: 10px;
}

/* Step Row */
.step-row {
    border: 1px solid var(--color-border);
    padding: 0;
    background-color: var(--color-bg);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: hidden;
}

.step-title {
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-xs) 7px;
    font-size: 0.95em;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    width: 100%;
}

/* Step Items in List */
.step-item {
    background: var(--color-bg-card);
    margin-bottom: 0.4rem;
    padding: 0.6rem var(--spacing-section);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xxl);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base) ease;
}

.step-item:hover {
    background: var(--color-bg);
    border-color: var(--color-border-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.step-name {
    flex: 1;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.step-index-badge {
    cursor: pointer;
    background: #444;
    color: #fff;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-right: 3px;
    font-weight: var(--font-weight-bold);
    min-width: 20px;
    text-align: center;
    display: inline-block;
}

/* Step Actions */
.step-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.step-actions button {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    cursor: pointer;
    background: transparent;
    border: 1px solid transparent;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.step-actions button:hover {
    background: var(--color-secondary-hover);
    color: var(--color-text-primary);
}

.step-actions button:disabled {
    opacity: 0.3;
    cursor: default;
    background: transparent !important;
    color: var(--color-border-dark) !important;
}

.step-actions button[title="Delete"]:hover {
    background: var(--color-danger-light);
    color: var(--color-danger-text);
}

.step-title .step-actions button {
    width: 22px;
    height: 17px;
    font-size: 0.8rem;
    line-height: 1;
}

/* Steps List */
.steps-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-section) var(--spacing-section-lg);
    background: var(--color-bg);
}

.steps-list::-webkit-scrollbar {
    width: 8px;
}

.steps-list::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

.steps-list::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--radius-sm);
}

.steps-list::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* ==========================================================================
   Modal Styles
   ========================================================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--color-modal-overlay);
}

.modal-content {
    background-color: var(--color-bg);
    margin: 1.5% auto; /* Reduced top margin slightly */
    padding: 0;
    border: 1px solid rgba(0, 0, 0, 0.1);
    width: 95%; /* Increased from 90% */
    max-width: 1400px; /* Increased from 1200px */
    height: 94%; /* Increased from 90% */
    max-height: 96vh; /* Increased from 95vh */
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-modal);
    overflow: hidden;
    animation: modalSlideIn var(--transition-slow) ease-out;
}

.modal-content.editor-content {
    max-width: 900px;
    width: 95%;
    height: 90vh;
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    color: var(--color-text);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-secondary-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.modal-content.about-content {
    max-width: 500px;
    height: auto;
    max-height: 80vh;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #f0f0f0;
    padding: var(--spacing-lg) var(--spacing-xxl);
    background-color: var(--color-bg);
    z-index: 10;
}

.modal-header h2 {
    margin: 0;
    font-size: var(--font-size-xxl);
    color: var(--color-text);
}

.modal-content.editor-content .modal-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-section) var(--spacing-section-lg);
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-bg-tertiary);
}

.modal-content.editor-content .modal-header h2 {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.modal-content.editor-content .modal-footer {
    padding: 0.3rem var(--spacing-section-lg);
    border-top: 1px solid var(--color-border-light);
    background: var(--color-bg-tertiary);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-xl);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.close-modal {
    color: #aaa;
    font-size: 28px;
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-base);
}

.close-modal:hover,
.close-modal:focus {
    color: var(--color-text-primary);
    text-decoration: none;
    cursor: pointer;
}

/* ==========================================================================
   Editor Modal Styles
   ========================================================================== */
.step-name-wrapper {
    flex-grow: 1;
    margin-right: 20px;
    position: relative;
}

#stepNameInput {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-secondary-border);
    color: var(--color-text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    transition: all var(--transition-base) ease;
    font-weight: var(--font-weight-medium);
    margin-left: var(--spacing-lg);
    width: 95%;
}

#stepNameInput:hover {
    background: var(--color-bg);
    border-color: var(--color-border-dark);
    box-shadow: var(--shadow-sm);
}

#stepNameInput:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px var(--color-primary-alpha);
    background: var(--color-bg);
}

.editor-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0.5rem var(--spacing-section);
    gap: 1.2rem;
    overflow: hidden;
    background: var(--color-bg);
}

.form-group label {
    font-size: var(--font-size-md);
    color: var(--color-secondary-text);
    margin-bottom: 0.5rem;
    display: block;
    font-weight: var(--font-weight-medium);
}

#stepCodeInput {
    flex: 1;
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    font-family: var(--font-family-mono);
    padding: var(--spacing-section);
    border: 1px solid var(--color-secondary-border);
    border-radius: var(--radius-md);
    resize: none;
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
}

#stepCodeInput:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: var(--color-bg);
}

/* ==========================================================================
   Image Styles
   ========================================================================== */
.images-track {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-xs);
    overflow-x: auto;
    overflow-y: hidden;
    flex: 1;
    align-items: center;
    padding: 5px;
    width: 100%;
    box-sizing: border-box;
}

.images-track::-webkit-scrollbar {
    height: 0px;
    background: transparent;
}

.images-track::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 0;
}

.images-track::-webkit-scrollbar-thumb:hover {
    background: transparent;
}

.image-item {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.image-item canvas,
.image-item img {
    height: var(--item-height);
    width: auto;
    border: 1px solid #eee;
    background: var(--color-bg);
    object-fit: contain;
}

.image-label {
    display: none;
}

/* Result Grid */
.result-grid {
    display: grid;
    /* Increased min-width from 160px to 220px for larger images */
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 4px;
    overflow-y: auto;
    padding: var(--spacing-lg);
    flex: 1;
    background-color: var(--color-bg-secondary);
}

.result-grid .image-item {
    border: 1px solid #eee;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    transition: all var(--transition-slow) cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    /* Ensure item takes full height of grid cell if needed */
}

.result-grid .image-item:hover {
    transform: scale(1.02);
    z-index: 10;
    box-shadow: var(--shadow-lg);
}

.result-grid .image-item canvas,
.result-grid .image-item img {
    max-width: 100%;
    height: auto;
    width: auto;
    /* Increased max-height from 140px to 200px */
    max-height: 200px;
    object-fit: contain;
    align-self: center;
}

.result-grid .image-label {
    display: block;
    text-align: center;
    font-size: 0.8em;
    color: #666;
    word-break: break-word;
    white-space: normal;
    overflow-wrap: anywhere;
    max-width: 100%;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.flex-grow {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.spacer {
    display: none;
}

.icon-mobile {
    display: none;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 768px) {
    body {
        padding: 5px;
    }

    .header-compact {
        flex-wrap: wrap;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .header-compact h2 {
        width: 100%;
        text-align: center;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        padding-bottom: var(--spacing-md);
        margin-bottom: var(--spacing-sm);
        display: flex;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-lg);
    }

    .header-compact #status {
        font-size: 1em;
    }

    .header-buttons,
    .btn-upload,
    .controls-inline {
        flex: 1;
        margin: 0 !important;
        justify-content: center;
        min-width: 0;
        display: flex;
        gap: 5px;
    }

    .header-buttons button,
    .controls-inline button,
    .btn-upload {
        flex: 1;
        width: auto;
        min-width: 0;
        padding: 0 var(--spacing-md);
    }

    .btn-primary,
    .btn-secondary {
        margin: 0 !important;
    }

    .image-item canvas,
    .image-item img {
        height: var(--item-height-mobile);
    }

    .modal-content,
    .modal-content.editor-content,
    .modal-content.about-content {
        width: 100%;
        height: 100%;
        max-width: 100%;
        max-height: 100%;
        margin: 0;
        border: none;
        border-radius: 0;
        padding: 0;
        box-shadow: none;
    }

    .modal-body,
    .editor-body,
    .result-grid {
        padding: var(--spacing-lg);
    }

    .modal-header h2 {
        font-size: var(--font-size-xl);
    }

    .result-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: var(--spacing-sm);
        padding: var(--spacing-xs);
    }
}

@media (max-width: 500px) {
    .btn-upload span {
        font-size: 0;
    }

    .btn-upload span::after {
        content: "📁";
        font-size: 14px;
    }

    .header-compact .label-text {
        display: none;
    }

    .header-compact .icon-mobile {
        display: inline;
        font-size: 1.4em;
    }
}