/**
 * Shayari Design Studio - Files Module Stylesheet
 * System Architecture: Independent Vanilla CSS layout based on a strict 8px spacing system.
 */

/* ==========================================================================
   CSS Custom Properties (Design Token System)
   ========================================================================== */
:root {
    /* Color Palette */
    --clr-bg-main: #f8f9fa;
    --clr-bg-card: #ffffff;
    --clr-bg-thump: #f1f3f5;
    --clr-border: #e9ecef;
    --clr-border-focus: #86b7fe;
    
    /* Text Colors */
    --clr-text-main: #212529;
    --clr-text-muted: #6c757d;
    --clr-text-badge: #495057;
    
    /* Interactive States */
    --clr-primary: #0d6efd;
    --clr-primary-hover: #0b5ed7;
    --clr-secondary: #6c757d;
    --clr-secondary-hover: #5c636a;
    --clr-danger: #dc3545;
    --clr-danger-hover: #bb2d3b;
    --clr-focus-shadow: rgba(13, 110, 253, 0.25);
    
    /* Spacing System (8px Base) */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    
    /* Component Tokens */
    --radius-sm: 4px;
    --radius-md: 8px;
    --shadow-subtle: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* ==========================================================================
   Page Layout & Typography
   ========================================================================== */
.studio-container {
    padding: var(--space-md);
    background-color: var(--clr-bg-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--clr-text-main);
}

.studio-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.studio-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

/* ==========================================================================
   Component: Main CSS Grid
   ========================================================================== */
.studio-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-md);
}

/* Responsive Breakpoints via Grid Auto-placement definitions */
@media (min-width: 576px) {
    .studio-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
    .studio-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1200px) {
    .studio-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Component: File Card Architecture
   ========================================================================== */
.studio-card {
    background-color: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-subtle);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.studio-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
}

/* Thumbnail Placeholder */
.studio-thumbnail {
    height: 160px;
    background-color: var(--clr-bg-thump);
    border-bottom: 1px solid var(--clr-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Card Information Context */
.studio-card-body {
    padding: var(--space-sm);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.studio-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--space-xs) 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.studio-badge {
    display: inline-block;
    font-size: 0.75rem;
    padding: 4px var(--space-xs);
    background-color: var(--clr-bg-main);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    color: var(--clr-text-badge);
}

.studio-meta-text {
    margin-top: var(--space-xs);
    font-size: 0.75rem;
    color: var(--clr-text-muted);
}

/* Card Action Layout */
.studio-card-actions {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--clr-border);
    display: flex;
    gap: var(--space-xs);
}

/* ==========================================================================
   Component: Form Controls & Inputs
   ========================================================================== */
.studio-form-group {
    margin-bottom: var(--space-sm);
}

.studio-label {
    display: block;
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--clr-text-muted);
    margin-bottom: var(--space-xs);
}

.studio-input,
.studio-select {
    width: 100%;
    padding: 10px var(--space-sm);
    font-size: 0.9rem;
    background-color: var(--clr-bg-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    box-sizing: border-box;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.studio-input:focus,
.studio-select:focus {
    outline: none;
    border-color: var(--clr-border-focus);
    box-shadow: 0 0 0 3px var(--clr-focus-shadow);
}

/* ==========================================================================
   Component: Buttons System
   ========================================================================== */
.studio-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 8px var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.studio-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--clr-focus-shadow);
}

/* Button Variants */
.studio-btn-primary {
    background-color: var(--clr-primary);
    color: #ffffff;
}
.studio-btn-primary:hover {
    background-color: var(--clr-primary-hover);
}

.studio-btn-outline-primary {
    background-color: transparent;
    border-color: var(--clr-primary);
    color: var(--clr-primary);
    flex-grow: 1;
}
.studio-btn-outline-primary:hover {
    background-color: var(--clr-primary);
    color: #ffffff;
}

.studio-btn-outline-secondary {
    background-color: transparent;
    border-color: var(--clr-border);
    color: var(--clr-secondary);
}
.studio-btn-outline-secondary:hover {
    background-color: var(--clr-bg-main);
    border-color: var(--clr-secondary-hover);
}

.studio-btn-outline-danger {
    background-color: transparent;
    border-color: var(--clr-border);
    color: var(--clr-danger);
}
.studio-btn-outline-danger:hover {
    background-color: var(--clr-danger);
    color: #ffffff;
    border-color: var(--clr-danger);
}

.studio-btn-light {
    background-color: var(--clr-bg-main);
    border-color: var(--clr-border);
    color: var(--clr-text-badge);
}
.studio-btn-light:hover {
    background-color: var(--clr-border);
}

/* ==========================================================================
   Component: Clean Native Modal & Overlay
   ========================================================================== */
.studio-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1050;
}

.studio-modal {
    background-color: var(--clr-bg-card);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 480px;
    margin: var(--space-sm);
    overflow: hidden;
}

.studio-modal-header {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--clr-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.studio-modal-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
}

.studio-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--clr-text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}
.studio-modal-close:hover {
    color: var(--clr-text-main);
}

.studio-modal-body {
    padding: var(--space-md);
}

.studio-modal-footer {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--clr-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-xs);
}

.studio-file-card {
    border-radius: 12px;
    overflow: hidden;
    transition: transform .18s ease, box-shadow .18s ease;
}

.studio-file-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 .75rem 1.5rem rgba(28, 38, 65, .10) !important;
}

.studio-thumbnail-placeholder {
    height: 172px;
    color: #68728a;
    background: linear-gradient(135deg, #eef2ff, #f9f7ff);
}

.empty-files { border: 2px dashed #dce1f0; border-radius: 14px; background: #fff; }