/* variables & base */
:root {
  --app-gradient-start: #6a11cb;
  --app-gradient-end: #2575fc;
  --app-text: #1e293b;
  --app-text-muted: #64748b;
  --app-bg: #f8fafc;
  --app-card-bg: #ffffff;
  --app-border: rgba(0, 0, 0, 0.08);
  --app-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --app-hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --app-radius: 16px;
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  --app-gradient-start: #8b5cf6;
  --app-gradient-end: #3b82f6;
  --app-text: #f8fafc;
  --app-text-muted: #94a3b8;
  --app-bg: #0f172a;
  --app-card-bg: #1e293b;
  --app-border: rgba(255, 255, 255, 0.08);
  --app-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
  --app-hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--app-text);
  background-color: var(--app-bg);
  transition: background-color var(--transition-speed), color var(--transition-speed);
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.025em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--app-gradient-start), var(--app-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.text-muted { color: var(--app-text-muted) !important; }

/* Buttons Overrides */
.btn-primary {
  background: linear-gradient(135deg, var(--app-gradient-start), var(--app-gradient-end));
  border: none;
  font-weight: 600;
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  color: #fff;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px 0 rgba(106, 17, 203, 0.39);
  color: #fff;
}
.btn-outline-primary {
  border: 2px solid var(--app-gradient-end);
  color: var(--app-gradient-end);
  font-weight: 600;
  border-radius: 50px;
}
.btn-outline-primary:hover {
  background: linear-gradient(135deg, var(--app-gradient-start), var(--app-gradient-end));
  color: #fff;
  border-color: transparent;
}

/* Glassmorphic Navbar */
.navbar {
  background: rgba(var(--app-card-bg), 0.8) !important;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--app-border);
  box-shadow: none;
  padding: 1rem 0;
  transition: all var(--transition-speed);
}
.navbar-brand {
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--app-text) !important;
}
.navbar-nav .nav-link {
  font-weight: 500;
  color: var(--app-text) !important;
  margin: 0 0.5rem;
  opacity: 0.8;
  transition: opacity var(--transition-speed);
}
.navbar-nav .nav-link:hover { opacity: 1; }

.theme-toggle-btn {
  background: none; border: none; font-size: 1.25rem; color: var(--app-text); cursor: pointer; padding: 0.5rem;
}

/* Hero Section */
.hero-section {
  padding: 6rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
/* Subdued background blob */
.hero-section::before {
  content: '';
  position: absolute;
  top: -20%; left: -10%; width: 50%; height: 100%;
  background: radial-gradient(circle, rgba(106, 17, 203, 0.15) 0%, transparent 70%);
  z-index: 0;
}
.hero-section::after {
  content: '';
  position: absolute;
  top: -10%; right: -10%; width: 50%; height: 100%;
  background: radial-gradient(circle, rgba(37, 117, 252, 0.15) 0%, transparent 70%);
  z-index: 0;
}
.hero-content {
  position: relative; z-index: 1;
}
.hero-title {
  font-size: 3.5rem; font-weight: 800; margin-bottom: 1.5rem; line-height: 1.2;
}
.hero-subtitle {
  font-size: 1.25rem; color: var(--app-text-muted); max-width: 600px; margin: 0 auto 3rem;
}

/* Search Box */
.search-wrapper {
  max-width: 650px; margin: 0 auto; position: relative;
  border-radius: 50px;
  background: var(--app-card-bg);
  box-shadow: var(--app-shadow);
  display: flex; align-items: center; padding: 0.5rem 1rem;
  border: 1px solid var(--app-border);
  transition: box-shadow var(--transition-speed);
}
.search-wrapper:focus-within {
  box-shadow: 0 0 0 3px rgba(37, 117, 252, 0.3);
}
.search-wrapper i {
  color: var(--app-text-muted); font-size: 1.2rem; margin: 0 10px;
}
.search-wrapper input {
  border: none; outline: none; background: transparent; flex: 1; padding: 0.75rem 0;
  font-size: 1.1rem; color: var(--app-text);
}

/* Tool Cards */
.tool-card {
  background: var(--app-card-bg);
  border-radius: var(--app-radius);
  padding: 1.5rem;
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  display: flex; flex-direction: column; height: 100%;
  text-decoration: none; color: inherit;
  position: relative; overflow: hidden;
}
.tool-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--app-hover-shadow);
  text-decoration: none; color: inherit;
}
.tool-icon-wrapper {
  width: 55px; height: 55px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 1.25rem;
  background: rgba(37, 117, 252, 0.1);
  color: var(--app-gradient-end);
}
.tool-card h4 { font-size: 1.2rem; margin-bottom: 0.5rem; font-weight: 700; color: var(--app-text); }
.tool-card p { font-size: 0.9rem; color: var(--app-text-muted); margin-bottom: 0; }
.tool-arrow {
  margin-top: auto; align-self: flex-end; opacity: 0; color: var(--app-gradient-end);
  transition: transform 0.3s, opacity 0.3s; transform: translateX(-10px);
}
.tool-card:hover .tool-arrow {
  opacity: 1; transform: translateX(0);
}

/* Forms & Inputs */
.form-control {
  background-color: var(--app-bg);
  border: 1px solid var(--app-border);
  color: var(--app-text);
  border-radius: 12px;
  padding: 0.75rem 1rem;
}
.form-control:focus {
  background-color: var(--app-card-bg);
  border-color: var(--app-gradient-end);
  box-shadow: 0 0 0 3px rgba(37, 117, 252, 0.25);
  color: var(--app-text);
}
.form-label { font-weight: 600; color: var(--app-text); margin-bottom: 0.5rem; }

/* Dashboard / Layouts */
.main-content { min-height: calc(100vh - 100px - 200px); padding: 3rem 0; }
.card {
  background: var(--app-card-bg);
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  box-shadow: var(--app-shadow);
  overflow: hidden;
}

/* Tool execution page */
.tool-workspace {
  display: flex; gap: 2rem;
  flex-wrap: wrap;
}
.tool-sidebar {
  flex: 1; min-width: 300px;
  background: var(--app-card-bg);
  padding: 2rem; border-radius: var(--app-radius);
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow);
}
.tool-output {
  flex: 2; min-width: 0; /* allows flex box shrink*/
  background: var(--app-card-bg);
  border-radius: var(--app-radius);
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow);
  display: flex; flex-direction: column;
}
.tool-output-header {
  padding: 1rem 1.5rem; border-bottom: 1px solid var(--app-border);
  display: flex; justify-content: space-between; align-items: center;
  background: rgba(0,0,0,0.02);
}
[data-theme="dark"] .tool-output-header { background: rgba(255,255,255,0.02); }
.tool-output-body {
  padding: 1.5rem; flex: 1; position: relative;
  font-family: 'Courier New', Courier, monospace;
  white-space: pre-wrap; font-size: 0.95rem; line-height: 1.6;
}
.copy-btn {
  background: var(--app-bg); border: 1px solid var(--app-border);
  padding: 0.4rem 0.8rem; border-radius: 6px; font-size: 0.85rem; font-weight: 600;
  color: var(--app-text); cursor: pointer; transition: all 0.2s;
}
.copy-btn:hover { background: var(--app-border); }

/* Footer */
footer {
  background: var(--app-card-bg);
  padding: 4rem 0 2rem; border-top: 1px solid var(--app-border);
  margin-top: auto;
}
.footer-text { color: var(--app-text-muted); }
.social-links a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--app-bg); color: var(--app-text);
  margin-right: 0.5rem; transition: all 0.2s; text-decoration: none;
}
.social-links a:hover {
  background: var(--app-gradient-start); color: #fff;
}