/* =========================================================
   ENCBYT CORE STYLES & DESIGN TOKENS
   Path: css/pwa.css
   ========================================================= */

/* 1. FONT LOADING OPTIMIZATION (font-display: swap to prevent render blocking) */
@font-face {
    font-family: 'Plus Jakarta Sans';
    font-style: normal;
    font-weight: 400 800;
    font-display: swap;
}

@font-face {
    font-family: 'Font Awesome 6 Free';
    font-style: normal;
    font-weight: 900;
    font-display: swap;
    src: local('Font Awesome 6 Free'), url('../assets/vendor/fontawesome/webfonts/fa-solid-900.woff2') format('woff2');
}

/* 2. ROOT LIGHT THEME TOKENS */
:root {
    /* Font Awesome Family */
    --fa-style-family-brands: "Font Awesome 6 Brands";
    --fa-font-brands: normal 400 1em/1 "Font Awesome 6 Brands";
    --fa-font-regular: normal 400 1em/1 "Font Awesome 6 Free";
    --fa-style-family-classic: "Font Awesome 6 Free";
    --fa-font-solid: normal 900 1em/1 "Font Awesome 6 Free";

    /* Base Typography */
    --font-family: 'Plus Jakarta Sans', sans-serif;
    --pwa-font-family: var(--font-family);

    /* Background & Surface Colors */
    --bg-page: #f1f5f9;
    --bg-light: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #64748b;

    /* PWA Backward Compatibility Mappings */
    --pwa-bg-main: var(--bg-page);
    --pwa-card-bg: var(--card-bg);
    --pwa-border: var(--border-color);
    --pwa-text-primary: var(--text-main);
    --pwa-text-muted: var(--text-muted);

    /* Primary Accent Palette & Gradients */
    --accent-primary: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-active: #1e40af;
    --accent-light: #eff6ff;
    --accent-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --accent-gradient-hover: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
    --accent-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
    --accent-shadow-hover: 0 6px 18px rgba(37, 99, 235, 0.38);

    /* PWA Accent Aliases */
    --pwa-accent: var(--accent-primary);
    --pwa-accent-hover: var(--accent-hover);
    --pwa-accent-light: var(--accent-light);

    /* Status & Alert Colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --pwa-success: var(--success-color);
    --pwa-warning: var(--warning-color);
    --pwa-danger: var(--danger-color);

    /* Elevation Shadows */
    --shadow-subtle: 0 4px 12px rgba(15, 23, 42, 0.03);
    --pwa-shadow: var(--shadow-subtle);

    /* Skeleton Loading Tokens (Light Mode) */
    --skeleton-base: #e2e8f0;
    --skeleton-shimmer: #f8fafc;
}

/* 3. DYNAMIC DARK THEME TOKENS */
[data-theme="dark"],
body.dark-mode {
    --bg-page: #0b0f19;
    --bg-light: #151d2e;
    --card-bg: #111827;
    --border-color: #1f2937;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;

    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-active: #1d4ed8;
    --accent-light: #1e293b;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --accent-gradient-hover: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --accent-shadow: 0 4px 14px rgba(59, 130, 246, 0.25);
    --accent-shadow-hover: 0 6px 18px rgba(59, 130, 246, 0.35);

    --shadow-subtle: 0 4px 12px rgba(0, 0, 0, 0.3);

    --skeleton-base: #1f2937;
    --skeleton-shimmer: #374151;
}

/* 4. BASE BUTTON RESET */
button {
    font-family: inherit;
    border: none;
    background: transparent;
    cursor: pointer;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

/* 5. PRIMARY ACTION BUTTONS */
.btn-primary,
.action-btn-primary,
button.btn-primary {
    font-family: var(--font-family);
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    padding: 0.7rem 1.2rem;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    box-shadow: var(--accent-shadow);
}

.btn-primary:hover,
.action-btn-primary:hover,
button.btn-primary:hover {
    background: var(--accent-gradient-hover);
    box-shadow: var(--accent-shadow-hover);
    transform: translateY(-1px);
}

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

/* 6. HARDWARE-ACCELERATED SKELETON LOADER */
@keyframes shimmerAnimation {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--skeleton-base) 25%,
        var(--skeleton-shimmer) 50%,
        var(--skeleton-base) 75%
    );
    background-size: 200% 100%;
    animation: shimmerAnimation 1.5s infinite linear;
    border-radius: 6px;
    display: inline-block;
}

.skeleton-text {
    height: 14px;
    width: 100%;
    margin-bottom: 6px;
    border-radius: 4px;
}

.skeleton-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    flex-shrink: 0;
}

.skeleton-card {
    height: 100px;
    width: 100%;
    border-radius: 10px;
}