/**
 * eXeViewer - Custom Styles
 */

/* CSS Variables */
:root {
    /* === Primary colors (eXeLearning branding) === */
    --primary-color: #0ba1a1;       /* Primary: buttons, active icons, drop zone border */
    --primary-dark: #088b8b;        /* Primary dark: hover and active states */
    --primary-rgb: 11, 161, 161;    /* Primary RGB: for transparent backgrounds */
    --success-text: #0a7a5a;        /* Success text: confirmation messages */
    --navbar-bg: #1a1d21;           /* Top navbar background */
    --tooltip-bg: #34373B;          /* Tooltip background */

    /* === Interface colors === */
    --bg-light: #f8f9fa;            /* Light background */
    --bg-dark: #212529;             /* Dark background (headings, contrast) */
    --surface-color: #ffffff;       /* Surface background: drop zone, viewer */
    --text-muted: #6c757d;          /* Secondary text */
    --border-color: #a3d3d3;        /* Borders with greenish tint */

    /* === Shadows and effects === */
    --shadow-sm: 0 0.125rem 0.25rem rgba(var(--primary-rgb), 0.075);  /* Subtle shadow */
    --shadow-md: 0 0.5rem 1rem rgba(var(--primary-rgb), 0.15);        /* Medium shadow */
    --focus-shadow: 0 0 0 0.25rem rgba(var(--primary-rgb), 0.25);     /* Accessible focus ring */

    /* === Transitions === */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;

    /* === Layout === */
    --navbar-height: 56px;

    /* === Dark mode colors (used in @media prefers-color-scheme: dark) === */
    --dark-bg-light: #1a1d21;       /* Light background in dark mode */
    --dark-bg-surface: #212529;     /* Surface background in dark mode */
    --dark-bg-modal: #2d3238;       /* Modal background in dark mode */
    --dark-text-color: #e9ecef;     /* Primary text in dark mode */
    --dark-text-muted: #adb5bd;     /* Secondary text in dark mode */
    --dark-text-bright: #f8f9fa;    /* Highlighted text in dark mode */
    --dark-border-color: #495057;   /* Borders in dark mode */
    --dark-success-text: #5dd39e;   /* Success text in dark mode (WCAG AA) */
}


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

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-light);
    overflow-x: hidden;
    overflow-y: auto;
}

/* Main Container */
.main-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top Navbar Styles */
#topNavbar {
    background: var(--navbar-bg);
    z-index: 1030;
    box-shadow: var(--shadow-sm);
}

#topNavbar .navbar-brand {
    font-weight: 600;
    font-size: 1.1rem;
}

.navbar-logo {
    height: 28px;
    width: auto;
}

#topNavbar button,
#welcomeLanguageBtn {
    min-width: 100px;
}
#topNavbar #btnDownload,
#topNavbar #btnShare,
#topNavbar #btnNewWindow {
    min-width: 0;
    border-color: transparent;
}
#topNavbar #btnShare:hover,
#topNavbar #btnNewWindow:hover,
#topNavbar #btnShare:focus,
#topNavbar #btnNewWindow:focus {
    border-color: var(--bs-btn-hover-bg);
}

#packageName {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (min-width: 768px) {
    #packageName {
        max-width: 400px;
    }
}

/* Welcome Screen */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
}

.welcome-content {
    max-width: 600px;
    width: 100%;
}

.logo-container {
    display: inline-block;
}

.logo-icon {
    width: 120px;
    height: auto;
}

.welcome-content h1 {
    font-weight: 700;
    color: var(--bg-dark);
}

/* Drop Zone */
.drop-zone {
    border: 3px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem 2rem;
    background-color: var(--surface-color);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.drop-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(var(--primary-rgb), 0.02);
}

.drop-zone.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(var(--primary-rgb), 0.05);
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.drop-zone-content {
    pointer-events: none;
}

.drop-zone label {
    pointer-events: auto;
}

.drop-icon {
    font-size: 3.5rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    display: block;
    transition: color var(--transition-fast);
}

.drop-zone:hover .drop-icon,
.drop-zone.drag-over .drop-icon {
    color: var(--primary-color);
}

.drop-text {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* URL Input Section */
.url-section {
    padding-top: 0.5rem;
}

.url-section-title {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.url-input-group {
    display: flex;
    gap: 0.5rem;
    max-width: 450px;
    margin: 0 auto;
}

.url-input-group .form-control {
    flex: 1;
    font-size: 0.9rem;
}

.url-input-group .btn {
    white-space: nowrap;
}

@media (max-width: 576px) {
    .url-input-group {
        flex-direction: column;
    }

    .url-input-group .btn {
        width: 100%;
    }
}

/* Loading State - Visual feedback when loading external content */
.drop-zone.loading-state,
.url-section.loading-state {
    opacity: 0.4;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

/* Status Area */
.status-area {
    min-height: 60px;
}

.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.loading-indicator .spinner-border {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--primary-color) !important;
}

/* Supported Formats */
.supported-formats {
    color: var(--text-muted);
}

.supported-formats i {
    color: var(--primary-color);
}

/* Footer links */
.supported-formats a {
    color: var(--bs-body-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.supported-formats a:hover,
.supported-formats a:focus {
    color: #000;
}

/* Viewer Container */
.viewer-container {
    height: calc(100vh - var(--navbar-height));
    margin-top: var(--navbar-height);
    overflow: hidden;
    background-color: var(--surface-color);
}

.content-frame {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* Responsive Adjustments */
@media (max-width: 576px) {
    .welcome-content h1 {
        font-size: 1.75rem;
    }

    .logo-icon {
        width: 80px;
    }

    .drop-zone {
        padding: 2rem 1rem;
    }

    .drop-icon {
        font-size: 2.5rem;
    }

    .drop-text {
        font-size: 1rem;
    }
}

/* Dark Mode Support (if user prefers) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-light: var(--dark-bg-light);
        --bg-dark: var(--dark-text-bright);
        --text-muted: var(--dark-text-muted);
        --border-color: var(--dark-border-color);
        --surface-color: var(--dark-bg-surface);
    }

    body {
        color: var(--dark-text-color);
    }

    .drop-zone {
        background-color: var(--dark-bg-surface);
    }

    .drop-zone:hover {
        background-color: rgba(var(--primary-rgb), 0.1);
    }

    .drop-zone.drag-over {
        background-color: rgba(var(--primary-rgb), 0.15);
    }

    .welcome-content h1 {
        color: var(--dark-text-bright);
    }

    .supported-formats a {
        color: var(--dark-text-color);
    }

    .supported-formats a:hover,
    .supported-formats a:focus {
        color: #fff;
    }

    /* Modal dark mode */
    .modal-content {
        background-color: var(--dark-bg-modal);
        border-color: var(--dark-border-color);
        color: var(--dark-text-color);
    }

    .modal-header {
        border-bottom-color: var(--dark-border-color);
        color: var(--dark-text-bright);
    }

    .modal-header .btn-close {
        filter: invert(1) grayscale(100%) brightness(200%);
    }

    .modal-body .form-control {
        background-color: var(--dark-bg-light);
        border-color: var(--dark-border-color);
        color: var(--dark-text-color);
    }

    .modal-body .form-check-label {
        color: var(--dark-text-color);
    }

    .modal-body .text-muted {
        color: var(--dark-text-muted) !important;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .logo-icon {
        animation: none;
    }

    .drop-zone {
        transition: none;
    }
}

/* Bootstrap elements */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff; /* texto blanco */
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary.active {
    background-color: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
    color: #fff;
}

.btn-outline-primary {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast),
                color var(--transition-fast);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-primary:active,
.btn-outline-primary.active {
    background-color: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
    color: #fff;
}

/* Checkbox with primary color */
.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    border-color: var(--primary-color);
    box-shadow: var(--focus-shadow);
}

.modal-body {
    min-height: 250px;
}

/* Success text with good contrast in both modes */
.alert-success-text {
    color: var(--success-text);
}

@media (prefers-color-scheme: dark) {
    .alert-success-text {
        color: var(--dark-success-text);
    }
}

/* Override Bootstrap tooltip colors */
.tooltip {
  --bs-tooltip-bg: var(--tooltip-bg);
}

/* Fix arrow for bottom-placed tooltips */
.bs-tooltip-bottom .tooltip-arrow::before {
  border-width: 0.4rem 0.4rem 0;
  border-bottom-color: transparent;
  border-top-color: var(--tooltip-bg);
}

/* Focus Styles */
.btn:focus,
input:focus,
.drop-zone:focus,
.drop-zone:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Offline Indicator */
.offline-indicator {
    position: fixed;
    bottom: 12px;
    left: 12px;
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    z-index: 1050;
    display: flex;
    align-items: center;
    gap: 4px;
}

@media (prefers-color-scheme: dark) {
    .offline-indicator {
        background: rgba(255, 255, 255, 0.15);
    }
}

/* Utility Classes */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Language Selector - Welcome Screen */
.language-selector-welcome {
    position: absolute;
    top: 12px;
    right: 12px;
}

.welcome-screen {
    position: relative;
}

/* Language Dropdown Styles */
.dropdown-menu[data-bs-popper] {
    min-width: 120px;
}

.dropdown-item:active,
.dropdown-item.active {
    background-color: var(--primary-color);
}

/* Navbar Language Selector */
#topNavbar .dropdown-menu {
    background-color: #fff;
}

#topNavbar .dropdown-item:hover {
    background-color: var(--bg-light);
    color: var(--bg-dark);
}

/* Dark Mode - Language Selector */
@media (prefers-color-scheme: dark) {
    .language-selector-welcome .btn-outline-secondary {
        color: var(--dark-text-muted);
        border-color: var(--dark-border-color);
    }

    .language-selector-welcome .btn-outline-secondary:hover {
        color: #fff;
        background-color: var(--dark-border-color);
        border-color: var(--dark-border-color);
    }

    .language-selector-welcome .dropdown-menu {
        background-color: var(--dark-bg-modal);
        border-color: var(--dark-border-color);
    }

    .language-selector-welcome .dropdown-item {
        color: var(--dark-text-color);
    }

    .language-selector-welcome .dropdown-item:hover {
        background-color: var(--dark-border-color);
    }
}