:root {
  --bg: #f7f7f9;
  --panel: #ffffff;
  --panel-border: #e5e7eb;
  --text: #1f2937;
  --text-dim: #6b7280;
  --accent: #e5322d;
  --accent-dark: #c41f1b;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 12px;

  --cat-pdf: #e5322d;
  --cat-resim: #2f80ed;
  --cat-video: #8e44ec;
  --cat-veri: #11a37f;

  --surface-soft: #f9fafb;
  --input-bg: #ffffff;
  --btn-secondary-bg: #f3f4f6;
  --btn-secondary-hover: #e5e7eb;
  --btn-disabled-bg: #d1d5db;
  --dropzone-bg: #fafafa;
  --dropzone-hover-bg: #fdeceb;
  --hero-gradient-start: #fdeceb;
}

[data-theme="dark"] {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-border: #2a2f3a;
  --text: #e8eaf0;
  --text-dim: #9aa3b2;
  --accent: #ff5c54;
  --accent-dark: #ff8782;

  --surface-soft: #1d2129;
  --input-bg: #1d2129;
  --btn-secondary-bg: #242933;
  --btn-secondary-hover: #2e3440;
  --btn-disabled-bg: #3a3f4b;
  --dropzone-bg: #1a1d24;
  --dropzone-hover-bg: rgba(255, 92, 84, 0.12);
  --hero-gradient-start: rgba(255, 92, 84, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
}

header.site-header .logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
}

header.site-header .logo span { color: var(--accent); }

nav.site-nav a {
  margin-left: 18px;
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 600;
}
nav.site-nav a:hover { color: var(--accent); text-decoration: none; }

.theme-toggle {
  margin-left: 18px;
  background: var(--btn-secondary-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  font-size: 1.05rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover { background: var(--btn-secondary-hover); }

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.hero {
  text-align: center;
  margin-bottom: 36px;
  padding: 40px 20px;
  border-radius: 20px;
  background: radial-gradient(circle at 50% 0%, var(--hero-gradient-start) 0%, var(--bg) 70%);
}
.hero h1 { font-size: 2.1rem; margin-bottom: 8px; color: var(--text); font-weight: 800; }
.hero p { color: var(--text-dim); font-size: 1.05rem; }

.category-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  margin: 36px 0 14px;
}

.category-title:first-of-type { margin-top: 0; }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.tool-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 20px 18px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 24, 40, 0.08);
  text-decoration: none;
}

.tool-card .icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 12px;
  background: var(--text-dim);
}

.tool-grid.cat-pdf .icon { background: var(--cat-pdf); }
.tool-grid.cat-resim .icon { background: var(--cat-resim); }
.tool-grid.cat-video .icon { background: var(--cat-video); }
.tool-grid.cat-veri .icon { background: var(--cat-veri); }

.tool-card h3 { margin: 0 0 6px; color: var(--text); font-size: 1.02rem; font-weight: 700; }
.tool-card p { margin: 0; color: var(--text-dim); font-size: 0.88rem; }

.tool-page h1 { font-size: 1.7rem; margin-bottom: 4px; color: var(--text); font-weight: 800; }
.tool-page .desc { color: var(--text-dim); margin-bottom: 24px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.dropzone {
  border: 2px dashed var(--panel-border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  color: var(--text-dim);
  background: var(--dropzone-bg);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone.dragover { border-color: var(--accent); background: var(--dropzone-hover-bg); }
.dropzone input { display: none; }

.file-list { list-style: none; padding: 0; margin: 16px 0; }
.file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-soft);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 8px;
  font-size: 0.92rem;
  color: var(--text);
}

.file-list li .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 70%; }
.file-list button.remove {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 0.85rem;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 16px;
}

.btn:hover { background: var(--accent-dark); }
.btn:disabled { background: var(--btn-disabled-bg); cursor: not-allowed; }
.btn.secondary { background: var(--btn-secondary-bg); color: var(--text); border: 1px solid var(--panel-border); }
.btn.secondary:hover { background: var(--btn-secondary-hover); }

input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); }

label.field-label { display: block; margin: 14px 0 6px; font-size: 0.9rem; color: var(--text-dim); font-weight: 600; }
input[type="text"], input[type="range"], select, textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
}

input[type="range"] { accent-color: var(--accent); border: none; padding: 0; background: transparent; }

.status { margin-top: 16px; font-size: 0.9rem; color: var(--text-dim); }
.status.error { color: var(--danger); }
.status.success { color: var(--success); }

.ad-slot {
  background: var(--surface-soft);
  border: 1px dashed var(--panel-border);
  border-radius: var(--radius);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 18px;
  margin: 28px 0;
}

footer.site-footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  padding: 24px;
  background: var(--panel);
  border-top: 1px solid var(--panel-border);
}

.thumb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.thumb-grid .thumb {
  position: relative;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface-soft);
}

.thumb-grid .thumb img { width: 100%; display: block; }
.thumb-grid .thumb .order { position: absolute; top: 4px; left: 4px; background: rgba(0,0,0,0.6); color: #fff; font-size: 0.7rem; padding: 2px 6px; border-radius: 4px; }
.thumb-grid .thumb button.remove { position: absolute; top: 4px; right: 4px; }