/* ============================================= */
/*           PicCompressor Modern Styles         */
/* ============================================= */
:root {
    --bg-color: #f4f7f6;
    --bg-card: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --primary-color: #0d9488;
    --primary-hover: #0f766e;
    --primary-light: #ccfbf1;
    --border-color: #e2e8f0;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --warning-color: #f59e0b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 28px rgba(13, 148, 136, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
}

[data-theme="dark"], body.theme-dark {
    --bg-color: #0f172a;
    --bg-card: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --primary-color: #2dd4bf;
    --primary-hover: #14b8a6;
    --primary-light: #134e4a;
    --border-color: #334155;
    --shadow-lg: 0 12px 28px rgba(0,0,0,0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: "Vazirmatn", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.8;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main { flex: 1; }
.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 1rem; }
.text-teal { color: var(--primary-color); }
.font-bold { font-weight: 700; }
a { text-decoration: none; color: inherit; }

/* =========== Navbar =========== */
.navbar {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--primary-color), #0891b2);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    box-shadow: var(--shadow-md);
}
.brand-name { display: block; font-size: 1.2rem; font-weight: 800; }
.brand-tagline { display: block; font-size: 0.75rem; color: var(--text-muted); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-link { color: var(--text-muted); font-weight: 500; transition: color 0.2s; font-size: 0.95rem; }
.nav-link:hover { color: var(--primary-color); }
.theme-btn {
    background: none; border: 1px solid var(--border-color);
    padding: 0.5rem; border-radius: 50%; cursor: pointer;
    color: var(--text-color); display: flex; align-items: center; justify-content: center;
    transition: background 0.2s;
}
.theme-btn:hover { background: var(--primary-light); }
.theme-btn .moon-icon { display: none; }
body.theme-dark .theme-btn .sun-icon { display: none; }
body.theme-dark .theme-btn .moon-icon { display: block; }

/* =========== Hero =========== */
.hero-section {
    padding: 4rem 0 2rem;
    text-align: center;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg-color) 100%);
}
.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.9);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}
.hero-title {
    font-size: 2.6rem;
    font-weight: 900;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--primary-color), #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto;
    font-weight: 400;
}

/* =========== Compressor Card =========== */
.compressor-section { padding: 2rem 0 4rem; }
.compressor-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.settings-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px dashed var(--border-color);
}
.setting-item label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
}
.setting-item label strong { color: var(--primary-color); margin-right: 0.5rem; }
.setting-item-check { display: flex; align-items: end; }
.checkbox-label { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; font-size: 0.9rem; font-weight: 500; }
.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}
.custom-range {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}
.custom-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px; height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(13, 148, 136, 0.4);
}
.custom-range::-moz-range-thumb {
    width: 18px; height: 18px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.custom-select, .custom-input {
    width: 100%;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}
.custom-select:focus, .custom-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

/* =========== Drop Zone =========== */
.drop-zone {
    position: relative;
    border: 3px dashed var(--primary-color);
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    padding: 3.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    overflow: hidden;
}
.drop-zone.drag-over {
    transform: scale(1.01);
    border-color: var(--primary-hover);
    background: rgba(13, 148, 136, 0.15);
    box-shadow: 0 0 0 5px rgba(13, 148, 136, 0.2);
}
.file-input { display: none; }
.drop-zone-content h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-color); }
.drop-hint { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.upload-icon-wrapper { margin-bottom: 1rem; color: var(--primary-color); animation: float 3s ease-in-out infinite; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.btn-primary, .btn-success, .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.8rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-success { background: var(--success-color); color: #fff; }
.btn-success:hover { background: #15803d; transform: translateY(-1px); }
.btn-outline {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}
.btn-outline:hover { background: var(--bg-color); color: var(--text-color); }

.loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.95);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    backdrop-filter: blur(4px);
    z-index: 10;
}
body.theme-dark .loading-overlay { background: rgba(30, 41, 59, 0.95); }
.loading-overlay.active { display: flex; }
.spinner {
    width: 44px; height: 44px;
    border: 4px solid var(--primary-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =========== Batch Bar & Results =========== */
.batch-action-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    margin-top: 1.5rem;
    border: 1px solid var(--border-color);
}
.batch-summary { display: flex; align-items: center; gap: 1rem; font-size: 0.95rem; font-weight: 500; }
.batch-summary .divider { color: var(--border-color); }
.batch-buttons { display: flex; gap: 0.75rem; }

.results-container {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.result-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.25rem;
    animation: slideUp 0.4s ease both;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}
.result-thumb {
    width: 72px; height: 72px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: var(--border-color);
    flex-shrink: 0;
}
.result-details { flex: 1; min-width: 220px; }
.result-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}
.result-specs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
}
.badge-saving {
    display: inline-block;
    background: rgba(22, 163, 74, 0.12);
    color: var(--success-color);
    padding: 0.2rem 0.7rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.8rem;
}
.progress-bar-bg {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 0.5rem;
}
.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #14b8a6);
    transition: width 0.6s ease;
}
.result-actions { display: flex; gap: 0.5rem; flex-shrink: 0; }
.result-actions button {
    padding: 0.5rem 1.1rem;
    font-size: 0.85rem;
    font-family: inherit;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: all 0.2s;
}
.btn-preview { background: transparent; border: 1px solid var(--border-color) !important; color: var(--text-muted); }
.btn-preview:hover { border-color: var(--primary-color) !important; color: var(--primary-color); }
.btn-download { background: var(--primary-color); color: #fff; }
.btn-download:hover { background: var(--primary-hover); }

/* =========== Modal & Preview =========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    backdrop-filter: blur(4px);
}
.modal-overlay.active { display: flex; animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 1000px;
    max-height: 92vh;
    overflow-y: auto;
    box-shadow: 0 25px 60px rgba(0,0,0,0.3);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 1.1rem; font-weight: 700; }
.modal-close {
    background: none; border: none;
    font-size: 2rem; cursor: pointer;
    color: var(--text-muted); line-height: 1;
    transition: color 0.2s;
}
.modal-close:hover { color: var(--danger-color); }
.modal-body { padding: 1.5rem; }
.comparison-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}
.comparison-image-box {
    position: relative;
    background: var(--bg-color);
    border-radius: var(--radius-md);
    padding: 0.75rem;
    text-align: center;
}
.comparison-image-box img {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}
.badge {
    position: absolute;
    top: 1.1rem; right: 1.1rem;
    padding: 0.3rem 0.9rem;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 700;
    z-index: 5;
}
.badge-orig { background: var(--danger-color); color: #fff; }
.badge-comp { background: var(--success-color); color: #fff; }
.img-specs {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* =========== Features Section =========== */
.features-section, .faq-section { padding: 4rem 0; }
.features-section { background: var(--bg-card); }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 {
    font-size: 1.9rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}
.section-header p { color: var(--text-muted); font-size: 1.05rem; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    transition: all 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}
.feature-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--text-color); }
.feature-card p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.9; }

/* =========== FAQ Section =========== */
.faq-list { max-width: 850px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
}
.faq-item[open] { border-color: var(--primary-color); }
.faq-item summary {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-color);
    position: relative;
    padding-left: 1.5rem;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    font-size: 1.4rem;
    color: var(--primary-color);
    font-weight: 400;
    flex-shrink: 0;
}
.faq-item[open] summary::after { content: "−"; }
.faq-answer { margin-top: 0.75rem; color: var(--text-muted); font-size: 0.92rem; line-height: 1.9; }

/* =========== Static Pages =========== */
.page-content-section { padding: 3rem 0; }
.static-page-box {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}
.static-page-box h1 { font-size: 1.8rem; font-weight: 800; color: var(--primary-color); margin-bottom: 0.5rem; }
.static-page-box h2 { font-size: 1.3rem; font-weight: 700; color: var(--text-color); margin: 1.8rem 0 0.75rem; }
.static-page-box p { color: var(--text-muted); line-height: 2; margin-bottom: 1rem; font-size: 0.98rem; }
.last-updated { font-size: 0.85rem !important; color: var(--primary-color) !important; font-weight: 600; }

/* =========== Footer =========== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 2rem;
}
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    padding-bottom: 2rem;
}
.footer-info h3 { font-size: 1.15rem; font-weight: 800; margin-bottom: 0.75rem; color: var(--primary-color); }
.footer-info p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.9; }
.footer-links-group h4 { font-size: 1rem; font-weight: 700; margin-bottom: 0.75rem; }
.footer-links-group ul { list-style: none; padding: 0; }
.footer-links-group li { margin-bottom: 0.5rem; }
.footer-links-group a { color: var(--text-muted); font-size: 0.9rem; transition: color 0.2s; }
.footer-links-group a:hover { color: var(--primary-color); }
.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* =========== Responsive =========== */
@media (max-width: 768px) {
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-section { padding: 2.5rem 0 1.5rem; }
    .nav-links { gap: 0.75rem; }
    .nav-link { font-size: 0.85rem; }
    .settings-panel { grid-template-columns: 1fr; }
    .batch-action-bar { flex-direction: column; align-items: stretch; gap: 1rem; }
    .batch-buttons { flex-direction: column; }
    .batch-buttons button { width: 100%; justify-content: center; }
    .result-item { flex-direction: column; align-items: flex-start; }
    .result-actions { width: 100%; }
    .result-actions button { flex: 1; justify-content: center; }
    .static-page-box { padding: 1.5rem; }
    .brand-tagline { display: none; }
    .section-header h2 { font-size: 1.4rem; }
}