/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #6c5ce7;
  --primary-light: #a29bfe;
  --accent: #fd79a8;
  --accent2: #00cec9;
  --dark: #0f0f17;
  --dark2: #1a1a2e;
  --dark3: #16213e;
  --card-bg: #1e1e30;
  --card-border: rgba(255,255,255,0.07);
  --text: #e0e0f0;
  --text-muted: #8888aa;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }

/* ===== NAVBAR ===== */
.navbar {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(15,15,23,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; gap: 32px;
  padding: 0 24px; height: 68px;
}

.logo {
  font-family: 'Syne', sans-serif;
  font-size: 1.4rem; font-weight: 800;
  display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
.logo-icon { color: var(--primary-light); font-size: 1.2rem; }

.nav-links {
  display: flex; list-style: none; gap: 8px; flex: 1;
}
.nav-links > li { position: relative; }
.nav-links > li > a {
  padding: 8px 14px; border-radius: 8px;
  font-size: 0.92rem; font-weight: 500; color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links > li > a:hover { color: var(--text); background: rgba(255,255,255,0.06); }

/* Mega dropdown */
.dropdown-mega {
  position: absolute; top: calc(100% + 12px); left: -200px;
  background: var(--dark2); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 28px;
  display: none; grid-template-columns: repeat(5, 160px); gap: 24px;
  box-shadow: var(--shadow);
}
.dropdown:hover .dropdown-mega { display: grid; }
.dd-col h4 {
  font-family: 'Syne', sans-serif; font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--primary-light); margin-bottom: 10px;
}
.dd-col a {
  display: block; font-size: 0.87rem; color: var(--text-muted);
  padding: 5px 0; transition: color var(--transition);
}
.dd-col a:hover { color: var(--text); }

.nav-actions { display: flex; gap: 10px; align-items: center; margin-left: auto; }

.btn-ghost {
  padding: 8px 18px; border-radius: 8px;
  font-size: 0.9rem; color: var(--text-muted);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition);
}
.btn-ghost:hover { color: var(--text); border-color: rgba(255,255,255,0.3); }

.btn-primary {
  padding: 9px 22px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-size: 0.9rem; font-weight: 600; color: white;
  transition: opacity var(--transition), transform var(--transition);
}
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.hamburger { display: none; background: none; border: none; color: var(--text); font-size: 1.4rem; cursor: pointer; }

/* ===== HERO ===== */
.hero {
  position: relative; overflow: hidden;
  padding: 110px 24px 90px;
  text-align: center;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(108,92,231,0.18) 0%, transparent 70%);
}

.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.shape {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.25;
}
.s1 { width: 500px; height: 500px; background: var(--primary); top: -150px; left: -100px; }
.s2 { width: 400px; height: 400px; background: var(--accent); top: -50px; right: -80px; }
.s3 { width: 300px; height: 300px; background: var(--accent2); bottom: -80px; left: 50%; transform: translateX(-50%); }

.hero-content { position: relative; max-width: 800px; margin: 0 auto; }

.hero-badge {
  display: inline-block; margin-bottom: 20px;
  padding: 6px 18px; border-radius: 100px;
  background: rgba(108,92,231,0.2); border: 1px solid rgba(162,155,254,0.3);
  font-size: 0.82rem; font-weight: 600; color: var(--primary-light);
  letter-spacing: 0.05em;
}

.hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800; line-height: 1.1; margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-light), var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem; color: var(--text-muted);
  max-width: 560px; margin: 0 auto 36px;
}

.hero-search {
  display: flex; max-width: 520px; margin: 0 auto;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 14px; overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.hero-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108,92,231,0.2);
}
.hero-search input {
  flex: 1; padding: 14px 20px; background: none;
  border: none; outline: none; color: var(--text); font-size: 1rem;
  font-family: 'DM Sans', sans-serif;
}
.hero-search input::placeholder { color: var(--text-muted); }
.hero-search button {
  padding: 12px 24px; background: var(--primary);
  border: none; color: white; font-weight: 600; cursor: pointer;
  font-family: 'DM Sans', sans-serif; font-size: 0.95rem;
  transition: background var(--transition);
}
.hero-search button:hover { background: #5a4bd1; }

/* ===== TOOLS SECTION ===== */
.tools-section { padding: 60px 24px 100px; }

.tools-container { max-width: 1280px; margin: 0 auto; }

.category-tabs {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 44px;
}
.tab {
  padding: 8px 20px; border-radius: 100px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text-muted); font-size: 0.88rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
  font-family: 'DM Sans', sans-serif;
}
.tab:hover { background: rgba(255,255,255,0.1); color: var(--text); }
.tab.active {
  background: var(--primary); border-color: var(--primary);
  color: white;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex; flex-direction: column; gap: 10px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  cursor: pointer; position: relative; overflow: hidden;
}
.tool-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(108,92,231,0.05), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.tool-card:hover { transform: translateY(-5px); border-color: rgba(162,155,254,0.3); box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
.tool-card:hover::before { opacity: 1; }

.tool-card.hidden { display: none; }

.ai-card { border-color: rgba(162,155,254,0.2); }

.tool-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.tool-icon svg { width: 24px; height: 24px; }

.tool-card h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1rem; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}

.tool-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }

.free-tag {
  display: inline-block; font-size: 0.7rem; font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase; letter-spacing: 0.06em;
}

.new-badge {
  display: inline-block; font-size: 0.6rem; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white; padding: 2px 7px; border-radius: 100px;
  text-transform: uppercase; letter-spacing: 0.06em;
  -webkit-text-fill-color: white;
}

/* ===== WHY SECTION ===== */
.why-section {
  padding: 80px 24px;
  background: linear-gradient(180deg, transparent, rgba(108,92,231,0.05), transparent);
  border-top: 1px solid var(--card-border);
}
.why-inner { max-width: 1100px; margin: 0 auto; text-align: center; }
.why-inner h2 {
  font-family: 'Syne', sans-serif; font-size: 2.2rem; font-weight: 800;
  margin-bottom: 48px;
}
.why-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.why-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 32px 24px; text-align: left;
}
.why-icon { font-size: 2rem; margin-bottom: 14px; }
.why-card h3 { font-family: 'Syne', sans-serif; font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.why-card p { font-size: 0.88rem; color: var(--text-muted); }

/* ===== FOOTER ===== */
.footer {
  background: var(--dark2);
  border-top: 1px solid var(--card-border);
  padding: 60px 24px 0;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 48px;
  padding-bottom: 48px;
}
.footer-brand { max-width: 260px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-muted); margin-top: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 48px; flex: 1; }
.footer-links > div { display: flex; flex-direction: column; gap: 10px; min-width: 120px; }
.footer-links h4 { font-family: 'Syne', sans-serif; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--primary-light); margin-bottom: 4px; }
.footer-links a { font-size: 0.88rem; color: var(--text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--card-border); padding: 20px 0;
  text-align: center;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-muted); }

/* ===== TOOL PAGE ===== */
.tool-page { max-width: 860px; margin: 0 auto; padding: 60px 24px; }
.tool-page-header { text-align: center; margin-bottom: 48px; }
.tool-page-header h1 { font-family: 'Syne', sans-serif; font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; }
.tool-page-header p { color: var(--text-muted); font-size: 1.05rem; }

.upload-zone {
  border: 2px dashed rgba(162,155,254,0.3); border-radius: 20px;
  padding: 60px 24px; text-align: center;
  background: rgba(108,92,231,0.04);
  cursor: pointer; transition: all var(--transition);
  position: relative;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--primary); background: rgba(108,92,231,0.1);
}
.upload-zone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.upload-icon { font-size: 3rem; margin-bottom: 16px; }
.upload-zone h2 { font-family: 'Syne', sans-serif; font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; }
.upload-zone p { color: var(--text-muted); font-size: 0.9rem; }
.upload-zone .btn-primary { margin-top: 20px; display: inline-block; padding: 12px 32px; border-radius: 12px; font-size: 1rem; }

.tool-options { margin: 32px 0; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 28px; }
.tool-options h3 { font-family: 'Syne', sans-serif; font-weight: 700; margin-bottom: 20px; }
.option-row { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-bottom: 16px; }
.option-row label { font-size: 0.9rem; color: var(--text-muted); min-width: 100px; }
.option-row select, .option-row input[type="range"], .option-row input[type="text"] {
  background: var(--dark3); border: 1px solid rgba(255,255,255,0.1);
  color: var(--text); border-radius: 8px; padding: 8px 14px;
  font-family: 'DM Sans', sans-serif; font-size: 0.9rem;
  outline: none; flex: 1;
  transition: border-color var(--transition);
}
.option-row select:focus, .option-row input:focus { border-color: var(--primary); }

.action-btn {
  width: 100%; padding: 16px; border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none; color: white; font-size: 1.1rem; font-weight: 700;
  cursor: pointer; font-family: 'Syne', sans-serif;
  transition: opacity var(--transition), transform var(--transition);
  margin-top: 8px;
}
.action-btn:hover { opacity: 0.88; transform: translateY(-2px); }
.action-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.progress-bar-wrap {
  background: rgba(255,255,255,0.08); border-radius: 100px;
  height: 8px; overflow: hidden; margin: 20px 0; display: none;
}
.progress-bar { height: 100%; background: linear-gradient(135deg, var(--primary), var(--accent)); border-radius: 100px; transition: width 0.4s ease; }

.result-box {
  background: var(--card-bg); border: 1px solid rgba(85,239,196,0.3);
  border-radius: var(--radius); padding: 28px; text-align: center;
  display: none; margin-top: 24px;
}
.result-box h3 { font-family: 'Syne', sans-serif; font-size: 1.2rem; color: #55efc4; margin-bottom: 12px; }
.result-box p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 20px; }
.download-btn {
  display: inline-block; padding: 12px 36px;
  background: linear-gradient(135deg, #00b894, #55efc4);
  border-radius: 12px; font-weight: 700; color: #0f0f17;
  font-family: 'Syne', sans-serif; cursor: pointer; border: none;
  font-size: 1rem; transition: opacity var(--transition);
}
.download-btn:hover { opacity: 0.85; }

.file-list { margin: 20px 0; display: flex; flex-direction: column; gap: 10px; }
.file-item {
  display: flex; align-items: center; gap: 14px;
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 10px; padding: 12px 16px;
}
.file-item .file-name { flex: 1; font-size: 0.9rem; }
.file-item .file-size { font-size: 0.8rem; color: var(--text-muted); }
.file-item .remove-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; transition: color var(--transition); }
.file-item .remove-btn:hover { color: #ff7675; }

/* AUTH PAGES */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 40px 24px; }
.auth-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 48px 40px; width: 100%; max-width: 440px; }
.auth-card h1 { font-family: 'Syne', sans-serif; font-size: 1.8rem; font-weight: 800; margin-bottom: 8px; }
.auth-card p { color: var(--text-muted); margin-bottom: 32px; font-size: 0.92rem; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 500; margin-bottom: 8px; color: var(--text-muted); }
.form-group input {
  width: 100%; padding: 12px 16px;
  background: var(--dark3); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px; color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 0.95rem;
  outline: none; transition: border-color var(--transition);
}
.form-group input:focus { border-color: var(--primary); }
.auth-submit {
  width: 100%; padding: 14px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none; color: white; font-size: 1rem; font-weight: 700;
  cursor: pointer; font-family: 'Syne', sans-serif;
  transition: opacity var(--transition);
}
.auth-submit:hover { opacity: 0.88; }
.auth-footer { text-align: center; margin-top: 20px; font-size: 0.88rem; color: var(--text-muted); }
.auth-footer a { color: var(--primary-light); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: block; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  .tools-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .tool-card { padding: 18px 14px; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .auth-card { padding: 32px 24px; }
}

/* MOBILE MENU */
.nav-mobile-menu {
  display: none; flex-direction: column; gap: 4px;
  position: absolute; top: 68px; left: 0; right: 0;
  background: var(--dark2); border-bottom: 1px solid var(--card-border);
  padding: 16px 24px; z-index: 999;
}
.nav-mobile-menu.open { display: flex; }
.nav-mobile-menu a { padding: 10px 0; border-bottom: 1px solid var(--card-border); color: var(--text-muted); font-size: 0.95rem; }

/* ===== ENHANCED TOOL PAGE STYLES v2 ===== */
.tool-page-header { max-width: 680px; margin: 0 auto 48px; }

.tips-box {
  background: rgba(108,92,231,.07);
  border: 1px solid rgba(108,92,231,.18);
  border-radius: 14px; padding: 16px 20px;
  margin-top: 28px; font-size: .85rem; color: var(--text-muted); line-height: 1.6;
}
.tips-box strong { color: var(--primary-light); }

.result-box { animation: fadeInUp .3s ease; }
@keyframes fadeInUp { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:translateY(0); } }

#progressLabel { margin-top: 8px; display: block; }

.option-row input[type=color] {
  width: 44px; height: 36px; border: none;
  border-radius: 8px; cursor: pointer; background: none; padding: 0;
}

/* File item v2 */
.file-item {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 12px; padding: 12px 16px;
  display: flex; align-items: center; gap: 12px;
}
.file-thumb { font-size: 1.3rem; }
.file-info { flex:1; display:flex; flex-direction:column; gap:2px; min-width:0; }
.file-name { font-size:.88rem; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.file-size { font-size:.74rem; color:var(--text-muted); }
.drag-hint { color:var(--text-muted); padding:0 4px; }
.add-more-btn {
  text-align:center; padding:11px; font-size:.84rem;
  color:var(--primary-light); cursor:pointer;
  border:1.5px dashed rgba(108,92,231,.3);
  border-radius:12px; transition:all .2s;
  background: transparent;
}
.add-more-btn:hover { background:rgba(108,92,231,.08); }
@keyframes slideInUp { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }
.file-item { animation: slideInUp .22s ease both; }

/* result info */
#resultInfo { color: var(--text-muted); }