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

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #16a34a;
    --error: #dc2626;
    --warning: #f59e0b;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* ── HEADER ──────────────────────────────────────────── */
.header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { max-width: 1280px; margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; gap: 24px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 1.25rem; font-weight: 700; color: var(--text); text-decoration: none; white-space: nowrap; }
.logo i { flex-shrink: 0; }
.logo-highlight { color: var(--primary); }
.nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.nav-link { color: var(--text-muted); padding: 8px 12px; border-radius: 6px; font-size: 0.85rem; font-weight: 500; transition: all 0.15s; white-space: nowrap; }
.nav-link:hover { background: var(--bg); color: var(--text); }
.dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 16px; min-width: 620px; z-index: 200; }
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.dropdown-col h4 { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: 8px; }
.dropdown-col a { display: block; padding: 5px 8px; border-radius: 4px; font-size: 0.83rem; color: var(--text); white-space: nowrap; }
.dropdown-col a:hover { background: var(--primary-light); color: var(--primary); }
.header-actions { margin-left: auto; }

/* ── BUTTONS ─────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 20px; border-radius: 8px; font-size: 0.9rem; font-weight: 600; cursor: pointer; border: none; transition: all 0.15s; text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-lg { padding: 14px 32px; font-size: 1rem; border-radius: 10px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ── FLASH ───────────────────────────────────────────── */
.flash-container { max-width: 1280px; margin: 16px auto 0; padding: 0 24px; }
.flash { padding: 14px 20px; border-radius: 8px; font-weight: 500; margin-bottom: 8px; }
.flash-error { background: #fef2f2; color: var(--error); border: 1px solid #fecaca; }
.flash-success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }

/* ── MAIN ────────────────────────────────────────────── */
.main { flex: 1; max-width: 1280px; margin: 0 auto; padding: 32px 24px; width: 100%; }

/* ── HERO ────────────────────────────────────────────── */
.hero { text-align: center; padding: 48px 24px 32px; }
.hero h1 { font-size: 2.25rem; font-weight: 800; margin-bottom: 12px; background: linear-gradient(135deg, var(--primary), #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.1rem; color: var(--text-muted); max-width: 600px; margin: 0 auto; }

/* ── TOOL SECTIONS ───────────────────────────────────── */
.tool-section { margin-bottom: 48px; }
.section-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 20px; padding-bottom: 8px; border-bottom: 2px solid var(--primary-light); color: var(--text); }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.tool-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: all 0.2s; display: block; text-decoration: none; color: var(--text); }
.tool-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-2px); color: var(--text); }
.tool-icon-flaticon { color: var(--primary); margin-bottom: 12px; display: block; }
.tool-header-icon-flaticon { color: var(--primary); margin-bottom: 12px; display: block; }
.upload-icon-flaticon { font-size: 3.5rem !important; color: var(--text-muted); margin-bottom: 12px; display: block; }
.file-item-icon { font-size: 0.9rem; color: var(--text-muted); margin-right: 4px; }
.tool-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.4; }

/* ── TOOL PAGE ───────────────────────────────────────── */
.tool-page { max-width: 780px; margin: 0 auto; }
.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 24px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text); }
.tool-header { text-align: center; margin-bottom: 24px; }
.tool-header-icon { font-size: 3rem; display: block; margin-bottom: 12px; }
.tool-header h1 { font-size: 1.75rem; font-weight: 700; margin-bottom: 8px; }
.tool-header p { color: var(--text-muted); font-size: 1rem; }

/* ── STEPS BOX ───────────────────────────────────────── */
.steps-box { display: flex; gap: 12px; margin-bottom: 28px; padding: 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); flex-wrap: wrap; }
.step-item { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; background: var(--primary); color: #fff; border-radius: 50%; font-size: 0.75rem; font-weight: 700; flex-shrink: 0; }

/* ── UPLOAD AREA ─────────────────────────────────────── */
.upload-area { background: var(--bg-card); border: 2px dashed var(--border); border-radius: var(--radius); padding: 32px; text-align: center; transition: all 0.2s; margin-bottom: 24px; }
.upload-area.dragover { border-color: var(--primary); background: var(--primary-light); }
.upload-box { cursor: pointer; }
.upload-icon { font-size: 3rem; margin-bottom: 12px; }
.upload-box h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 4px; }
.upload-box p { color: var(--text-muted); font-size: 0.9rem; }
.upload-hint { margin-top: 6px; font-size: 0.78rem !important; color: var(--text-muted); background: var(--bg); display: inline-block; padding: 4px 12px; border-radius: 20px; }
.file-input { display: none; }

/* ── FILE LIST ───────────────────────────────────────── */
.file-list { display: none; margin-top: 16px; text-align: left; }
.file-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--bg); border-radius: 8px; margin-bottom: 6px; font-size: 0.9rem; }
.file-name { flex: 1; font-weight: 500; }
.file-size { color: var(--text-muted); font-size: 0.8rem; }
.file-remove { background: none; border: none; color: var(--error); cursor: pointer; font-size: 1rem; padding: 4px 8px; border-radius: 4px; }
.file-remove:hover { background: #fef2f2; }

/* ── SECONDARY UPLOAD ────────────────────────────────── */
.secondary-upload { margin-top: 20px; padding: 20px; background: var(--bg); border: 1px dashed var(--border); border-radius: var(--radius); text-align: center; }
.secondary-upload h4 { font-size: 1rem; margin-bottom: 8px; }

/* ── TOOL OPTIONS ────────────────────────────────────── */
.tool-options { display: flex; flex-direction: column; gap: 14px; margin-top: 20px; text-align: left; }
.tool-options:empty { display: none; }

.option-section-header { margin-top: 16px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.option-section-header:first-child { margin-top: 0; }
.option-section-header h3 { font-size: 0.95rem; font-weight: 700; color: var(--text); }

.option-group { display: flex; flex-direction: column; gap: 5px; }
.option-group label { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.option-group select, .option-group input[type="text"], .option-group input[type="number"] {
    padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.9rem;
    background: #fff; transition: border-color 0.15s; width: 100%; max-width: 360px;
}
.option-group select:focus, .option-group input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }

/* Slider */
.option-slider input[type="range"] {
    -webkit-appearance: none; width: 100%; max-width: 400px; height: 8px;
    background: var(--border); border-radius: 4px; outline: none; cursor: pointer;
}
.option-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 22px; height: 22px; background: var(--primary);
    border-radius: 50%; cursor: pointer; border: 2px solid #fff; box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.slider-value { color: var(--primary); font-weight: 700; }
.option-note { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }

/* Preset Button Grid */
.option-presets { margin: 4px 0; }
.preset-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.preset-btn {
    padding: 10px 16px; border: 1px solid var(--border); border-radius: 8px;
    background: #fff; cursor: pointer; font-size: 0.85rem; text-align: center;
    transition: all 0.15s; min-width: 80px; display: flex; flex-direction: column; gap: 2px;
}
.preset-btn:hover { border-color: var(--primary); background: var(--primary-light); }
.preset-btn.active { border-color: var(--primary); background: var(--primary); color: #fff; }
.preset-label { font-weight: 600; }
.preset-sub { font-size: 0.72rem; opacity: 0.7; }

/* Checkbox */
.option-checkbox { flex-direction: row; align-items: center; gap: 10px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 500 !important; }
.checkbox-label input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; accent-color: var(--primary); }

/* Form grid for two-column options */
.tool-options { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
.option-section-header { grid-column: 1 / -1; }
.option-presets { grid-column: 1 / -1; }
.option-checkbox { grid-column: 1 / -1; }
.option-slider { grid-column: 1 / -1; }

.upload-form .btn { margin-top: 20px; grid-column: 1 / -1; justify-self: center; }

/* ── PROGRESS ────────────────────────────────────────── */
.progress-container { max-width: 780px; margin: 24px auto 0; text-align: center; }
.progress-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--primary), #7c3aed); width: 0%; transition: width 0.3s; border-radius: 4px; }
.progress-text { margin-top: 8px; font-size: 0.85rem; color: var(--text-muted); }

/* ── RESULT PAGE ─────────────────────────────────────── */
.result-page { max-width: 640px; margin: 0 auto; }
.result-container { text-align: center; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 48px 32px; }
.result-container h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.result-container p { color: var(--text-muted); margin-bottom: 32px; }
.result-actions { display: flex; flex-direction: column; gap: 12px; align-items: center; margin-bottom: 24px; }
.result-actions .btn { width: 100%; max-width: 320px; }
.result-note p { font-size: 0.8rem; color: var(--text-muted); }

/* ── TRUST SECTION ───────────────────────────────────── */
.trust-section { text-align: center; padding: 48px 0 16px; }
.trust-section h2 { font-size: 1rem; color: var(--text-muted); font-weight: 500; margin-bottom: 24px; }
.trust-logos { display: flex; justify-content: center; align-items: center; gap: 40px; flex-wrap: wrap; }
.trust-logos span { color: var(--text-muted); font-weight: 700; font-size: 1rem; opacity: 0.5; }

/* ── FOOTER ──────────────────────────────────────────── */
.footer { background: #fff; border-top: 1px solid var(--border); padding: 48px 24px 24px; margin-top: 64px; }
.footer-inner { max-width: 1280px; margin: 0 auto; display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; margin-top: 8px; }
.footer-brand .logo-text { font-size: 1.15rem; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-col h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: 10px; }
.footer-col a { display: block; font-size: 0.83rem; color: var(--text-muted); padding: 3px 0; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { max-width: 1280px; margin: 32px auto 0; padding-top: 16px; border-top: 1px solid var(--border); text-align: center; }
.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }

/* ── LANGUAGE SWITCHER ──────────────────────────────── */
.lang-switcher { position: relative; }
.lang-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
    background: var(--bg-card); color: var(--text); cursor: pointer;
    font-size: 0.82rem; font-weight: 600; transition: all 0.15s;
}
.lang-btn:hover { border-color: var(--primary); background: var(--primary-light); }
.lang-btn i { color: var(--primary); font-size: 0.95rem; }
.lang-flag { color: var(--text); }
.lang-arrow { font-size: 0.65rem; color: var(--text-muted); }
.lang-dropdown {
    display: none; position: absolute; top: 100%; right: 0; margin-top: 4px;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow-lg); min-width: 170px; z-index: 300; overflow: hidden;
}
.lang-dropdown.show { display: block; }
.lang-option {
    display: flex; align-items: center; gap: 10px; padding: 10px 14px;
    text-decoration: none; color: var(--text); font-size: 0.85rem;
    transition: background 0.1s; border-bottom: 1px solid var(--border);
}
.lang-option:last-child { border-bottom: none; }
.lang-option:hover { background: var(--primary-light); color: var(--primary); }
.lang-option.active { background: var(--primary-light); color: var(--primary); font-weight: 700; }
.lang-code { font-weight: 700; min-width: 30px; color: var(--text-muted); font-size: 0.78rem; }
.lang-option.active .lang-code { color: var(--primary); }

/* ── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; height: auto; padding: 12px 16px; gap: 12px; }
    .nav { order: 3; width: 100%; overflow-x: auto; }
    .tool-grid { grid-template-columns: 1fr; }
    .tool-options { grid-template-columns: 1fr; }
    .dropdown-menu { min-width: 320px; }
    .dropdown-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.5rem; }
    .footer-inner { flex-direction: column; }
    .footer-links { gap: 24px; }
    .steps-box { flex-direction: column; gap: 10px; }
}