/* ===========================
   ImageToolsLab — Main Styles
   =========================== */

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

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #eef2ff;
  --accent: #a5b4fc;
  --bg: #ffffff;
  --bg2: #f8fafc;
  --bg3: #f1f5f9;
  --text: #0f172a;
  --text2: #475569;
  --text3: #94a3b8;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 32px rgba(99,102,241,.15);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text); background: var(--bg); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.hidden { display: none !important; }

/* ── HEADER ───────────────────── */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: var(--text); }
.logo-text { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav { display: flex; gap: 32px; }
.nav-link { font-size: 0.9rem; font-weight: 500; color: var(--text2); transition: color var(--transition); }
.nav-link:hover { color: var(--primary); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; border: none; background: none; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

/* ── HERO ─────────────────────── */
.hero { padding: 80px 0 56px; text-align: center; background: linear-gradient(160deg, #fafbff 0%, #f0f4ff 100%); }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: var(--primary-light); color: var(--primary); font-size: 0.82rem; font-weight: 600; padding: 6px 14px; border-radius: 999px; margin-bottom: 24px; border: 1px solid #c7d2fe; }
.hero-title { font-family: var(--font-display); font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 700; line-height: 1.15; margin-bottom: 20px; color: var(--text); }
.gradient-text { background: linear-gradient(135deg, var(--primary), #8b5cf6, #06b6d4); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { font-size: 1.1rem; color: var(--text2); max-width: 560px; margin: 0 auto 40px; }

/* Upload Zone */
.upload-zone {
  background: #fff;
  border: 2px dashed #c7d2fe;
  border-radius: 20px;
  padding: 48px 32px;
  max-width: 640px;
  margin: 0 auto;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.upload-icon { margin-bottom: 16px; }
.upload-main { font-size: 1.15rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.upload-sub { color: var(--text3); font-size: 0.9rem; margin-bottom: 20px; }
.btn-upload { background: var(--primary); color: #fff; border: none; padding: 12px 28px; border-radius: var(--radius-sm); font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: background var(--transition); margin-bottom: 16px; }
.btn-upload:hover { background: var(--primary-dark); }
.upload-formats { font-size: 0.78rem; color: var(--text3); }

/* Tool Selector */
.tool-selector { max-width: 640px; margin: 20px auto 0; }
.tool-selector-label { font-weight: 600; color: var(--text); margin-bottom: 12px; }
.quick-tools { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.quick-tool { background: #fff; border: 1px solid var(--border); padding: 10px 18px; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 500; color: var(--text); cursor: pointer; transition: all var(--transition); }
.quick-tool:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }

/* ── STATS BAR ─────────────────── */
.stats-bar { background: var(--primary); padding: 20px 0; }
.stats-inner { display: flex; align-items: center; justify-content: center; gap: 32px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; align-items: center; }
.stat-num { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; color: #fff; }
.stat-label { font-size: 0.78rem; color: rgba(255,255,255,0.75); font-weight: 500; }
.stat-divider { width: 1px; height: 36px; background: rgba(255,255,255,0.25); }

/* ── SECTION COMMONS ────────────── */
.section-header { text-align: center; margin-bottom: 48px; }
.section-eyebrow { display: inline-block; background: var(--primary-light); color: var(--primary); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; padding: 4px 12px; border-radius: 999px; margin-bottom: 12px; }
.section-title { font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; color: var(--text); margin-bottom: 12px; }
.section-sub { color: var(--text2); font-size: 1rem; max-width: 480px; margin: 0 auto; }

/* ── TOOLS SECTION ──────────────── */
.tools-section { padding: 80px 0; background: var(--bg); }

.category-tabs { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px; }
.cat-tab { background: var(--bg3); border: 1px solid var(--border); color: var(--text2); padding: 8px 20px; border-radius: 999px; font-size: 0.88rem; font-weight: 500; cursor: pointer; transition: all var(--transition); }
.cat-tab:hover, .cat-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }

.tool-card {
  display: flex; align-items: flex-start; gap: 14px;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
  text-decoration: none; color: var(--text);
  transition: all 0.2s; position: relative;
  overflow: hidden;
}
.tool-card:hover {
  border-color: var(--primary); box-shadow: 0 4px 20px rgba(99,102,241,.12);
  transform: translateY(-2px);
}
.tool-icon { width: 46px; height: 46px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0; }
.tool-info h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; color: var(--text); }
.tool-info p { font-size: 0.82rem; color: var(--text2); line-height: 1.4; }
.tool-badge { position: absolute; top: 12px; right: 12px; font-size: 0.7rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; text-transform: uppercase; letter-spacing: 0.05em; }
.tool-badge.popular { background: #fef3c7; color: #d97706; }
.tool-badge.new { background: #d1fae5; color: #059669; }

/* ── FEATURES ───────────────────── */
.features-section { padding: 80px 0; background: var(--bg2); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.feature-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: box-shadow var(--transition); }
.feature-card:hover { box-shadow: var(--shadow); }
.feature-icon { font-size: 2rem; margin-bottom: 16px; }
.feature-card h3 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.feature-card p { color: var(--text2); font-size: 0.9rem; line-height: 1.6; }

/* ── HOW IT WORKS ──────────────── */
.how-section { padding: 80px 0; }
.steps { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.step { text-align: center; flex: 0 0 200px; }
.step-num { width: 52px; height: 52px; background: var(--primary-light); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; margin: 0 auto 14px; }
.step h3 { font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 0.88rem; color: var(--text2); }
.step-arrow { font-size: 1.5rem; color: var(--text3); flex-shrink: 0; }

/* ── CTA SECTION ───────────────── */
.cta-section { background: linear-gradient(135deg, var(--primary), #8b5cf6); padding: 60px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-content h2 { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.cta-content p { color: rgba(255,255,255,0.85); }
.btn-primary { background: #fff; color: var(--primary); padding: 14px 32px; border-radius: var(--radius-sm); font-weight: 700; font-size: 1rem; border: none; cursor: pointer; transition: all 0.2s; display: inline-block; white-space: nowrap; }
.btn-primary:hover { transform: scale(1.04); box-shadow: 0 8px 24px rgba(0,0,0,.18); }

/* ── FOOTER ─────────────────────── */
.footer { background: #0f172a; color: #94a3b8; padding: 60px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; padding-bottom: 48px; }
.footer-brand { max-width: 260px; }
.footer-brand .logo-text { -webkit-text-fill-color: #a5b4fc; background: none; }
.footer-brand p { font-size: 0.88rem; margin-top: 12px; line-height: 1.6; color: #64748b; }
.footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.footer-col h4 { color: #e2e8f0; font-size: 0.85rem; font-weight: 600; margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col a { display: block; font-size: 0.85rem; color: #64748b; margin-bottom: 8px; transition: color var(--transition); }
.footer-col a:hover { color: #a5b4fc; }
.footer-bottom { border-top: 1px solid #1e293b; padding: 20px 0; }
.footer-bottom p { font-size: 0.8rem; color: #475569; }
.footer-bottom small { color: #334155; }

/* ── TOOL PAGE LAYOUT ─────────── */
.tool-page { padding: 48px 0 80px; }
.tool-page-header { text-align: center; margin-bottom: 40px; }
.tool-page-header h1 { font-family: var(--font-display); font-size: 2.2rem; font-weight: 700; margin-bottom: 10px; }
.tool-page-header p { color: var(--text2); font-size: 1rem; }
.tool-workspace { max-width: 800px; margin: 0 auto; }
.tool-panel { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; margin-bottom: 20px; }
.tool-panel h2 { font-size: 1rem; font-weight: 600; margin-bottom: 20px; color: var(--text); }
.drop-area { border: 2px dashed var(--border); border-radius: var(--radius); padding: 40px; text-align: center; cursor: pointer; transition: all 0.2s; }
.drop-area:hover, .drop-area.active { border-color: var(--primary); background: var(--primary-light); }
.drop-area p { color: var(--text2); margin-bottom: 12px; }

/* Controls */
.controls { display: flex; flex-direction: column; gap: 16px; }
.control-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.control-label { font-size: 0.88rem; font-weight: 500; min-width: 100px; color: var(--text); }
.control-input { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.9rem; outline: none; transition: border-color var(--transition); }
.control-input:focus { border-color: var(--primary); }
.control-select { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.9rem; outline: none; background: #fff; cursor: pointer; }
.range-wrap { display: flex; align-items: center; gap: 10px; flex: 1; }
.range-wrap input[type=range] { flex: 1; accent-color: var(--primary); }
.range-val { min-width: 36px; text-align: right; font-size: 0.9rem; font-weight: 600; color: var(--primary); }

/* Image Preview */
.preview-area { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.preview-box { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.preview-label { font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text3); padding: 8px 12px; background: var(--bg3); border-bottom: 1px solid var(--border); }
.preview-box img { width: 100%; height: 200px; object-fit: contain; padding: 12px; background: #f8fafc; }
.preview-info { padding: 10px 12px; font-size: 0.8rem; color: var(--text2); }

/* Action Buttons */
.action-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.btn { padding: 10px 22px; border-radius: var(--radius-sm); font-size: 0.92rem; font-weight: 600; cursor: pointer; border: none; transition: all 0.2s; }
.btn-convert { background: var(--primary); color: #fff; }
.btn-convert:hover { background: var(--primary-dark); }
.btn-download { background: #059669; color: #fff; }
.btn-download:hover { background: #047857; }
.btn-reset { background: var(--bg3); color: var(--text2); }
.btn-reset:hover { background: var(--border); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Progress */
.progress-bar { height: 4px; background: var(--border); border-radius: 999px; overflow: hidden; margin-top: 12px; }
.progress-fill { height: 100%; background: var(--primary); border-radius: 999px; transition: width 0.4s; }

/* Toast */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: #1e293b; color: #fff; padding: 12px 20px; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 500; box-shadow: var(--shadow); animation: slideIn 0.3s ease; max-width: 300px; }
.toast.success { border-left: 3px solid #10b981; }
.toast.error { border-left: 3px solid #ef4444; }
@keyframes slideIn { from { transform: translateX(100px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── RESPONSIVE ─────────────────── */
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-brand { max-width: 100%; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .preview-area { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .nav { display: none; }
  .nav.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); padding: 16px 24px; gap: 16px; }
  .hamburger { display: flex; }
  .stats-inner { gap: 20px; }
  .stat-divider { display: none; }
  .steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
  .cta-inner { flex-direction: column; text-align: center; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .tool-panel { padding: 20px; }
  .preview-area { grid-template-columns: 1fr; }
}