/**
 * Main styles for Circle-it application
 * Contains layout, typography, and general styling
 */

/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-secondary: #64748b;
    --color-secondary-hover: #475569;
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-dropzone-active: #ddd6fe;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;

    /* Canvas Size */
    --canvas-size: 400px;
    --preview-size: 120px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
}

.app-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.025em;
}

.app-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

/* Main Content */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Upload Section */
.upload-section {
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-xl) 0;
}

/* Dropzone */
.dropzone {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    padding: var(--spacing-2xl);
    background-color: var(--color-surface);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.dropzone:hover,
.dropzone:focus {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
    outline: none;
}

.dropzone.drag-over {
    border-color: var(--color-primary);
    background-color: var(--color-dropzone-active);
    border-style: solid;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    pointer-events: none;
}

.dropzone-icon {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    transition: color var(--transition-normal);
}

.dropzone:hover .dropzone-icon,
.dropzone:focus .dropzone-icon {
    color: var(--color-primary);
}

.dropzone-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.dropzone-hint {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.dropzone-formats {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.dropzone-paste {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

.dropzone-paste kbd {
    display: inline-block;
    padding: 0.125rem 0.375rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 0 var(--color-border);
}

.file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Editor Section */
.editor-section {
    width: 100%;
    padding: var(--spacing-lg) 0;
    animation: fadeIn var(--transition-slow) ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.editor-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .editor-layout {
        grid-template-columns: 1fr 280px;
        align-items: start;
    }
}

/* Canvas Area */
.canvas-area {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.canvas-wrapper {
    position: relative;
    width: var(--canvas-size);
    height: var(--canvas-size);
    background: repeating-conic-gradient(#e5e5e5 0% 25%, #ffffff 0% 50%) 50% / 20px 20px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.canvas-wrapper[data-shape="square"] {
    border-radius: 0;
}

.canvas-wrapper[data-shape="rounded"] {
    /* border-radius set dynamically via JS */
}

#canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
    touch-action: none;
}

#canvas:active {
    cursor: grabbing;
}

.canvas-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.4);
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.canvas-wrapper:hover .canvas-overlay {
    opacity: 1;
}

.drag-hint {
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 0, 0, 0.5);
    border-radius: var(--radius-full);
}

.canvas-help {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* Controls Panel */
.controls-panel {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

/* Preview Section */
.preview-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.preview-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.preview-wrapper {
    display: flex;
    justify-content: center;
    background: repeating-conic-gradient(#e5e5e5 0% 25%, #ffffff 0% 50%) 50% / 10px 10px;
    border-radius: var(--radius-full);
    width: fit-content;
    margin: 0 auto;
    overflow: hidden;
}

.preview-wrapper[data-shape="square"] {
    border-radius: 0;
}

.preview-wrapper[data-shape="rounded"] {
    /* border-radius set dynamically via JS */
}

#previewCanvas {
    display: block;
    width: var(--preview-size);
    height: var(--preview-size);
    border-radius: var(--radius-full);
}

#previewCanvas[data-shape="square"] {
    border-radius: 0;
}

#previewCanvas[data-shape="rounded"] {
    /* border-radius set dynamically via JS */
}

.preview-info {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--spacing-sm);
}

/* Footer */
.app-footer {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: auto;
}

.app-footer p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.app-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all var(--transition-slow);
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: var(--color-success);
}

.toast.error {
    background: var(--color-error);
}

/* Responsive Adjustments */
@media (max-width: 480px) {
    :root {
        --canvas-size: 300px;
    }

    .app-container {
        padding: var(--spacing-md);
    }

    .app-title {
        font-size: 1.5rem;
    }

    .app-subtitle {
        font-size: 0.9375rem;
    }

    .dropzone {
        min-height: 260px;
        padding: var(--spacing-xl);
    }

    .dropzone-text {
        font-size: 1.125rem;
    }

    .controls-panel {
        padding: var(--spacing-md);
    }
}

/* Hidden utility */
[hidden] {
    display: none !important;
}