@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Light Theme Colors (Default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  
  /* Brand Accents (Inspired by Aurum) */
  --accent-color: #1f5ce5;
  --accent-hover: #1a50cc;
  --accent-light: #eff4ff;
  --accent-gradient: linear-gradient(103.42deg, #1f5ce5, #2c6ff3);
  --accent-gradient-hover: linear-gradient(103.42deg, #1a50cc, #2664d9);
  
  /* Status Colors */
  --success: #21d262;
  --success-bg: rgba(33, 210, 98, 0.1);
  --error: #ea3943;
  --error-bg: rgba(234, 57, 67, 0.1);
  --warning: #cd9505;
  
  /* UI Elements */
  --border-color: #e2e8f0;
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.4);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 30px rgba(31, 92, 229, 0.15);
  
  /* Typography & Animation */
  --font-main: 'Inter', 'Lato', sans-serif;
  --transition-fast: 0.2s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-md: 12px;
  --radius-lg: 20px;
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-primary: #0f1115;
  --bg-secondary: #1a1d24;
  --bg-card: rgba(26, 29, 36, 0.8);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  
  --accent-light: rgba(31, 92, 229, 0.15);
  --border-color: #2d3340;
  --glass-bg: rgba(26, 29, 36, 0.65);
  --glass-border: rgba(255, 255, 255, 0.05);
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background Animated Gradient Mesh */
.bg-mesh {
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, var(--accent-light) 0%, transparent 40%);
  z-index: -1;
  opacity: 0.6;
  pointer-events: none;
  animation: pulseMesh 15s infinite alternate ease-in-out;
}

@keyframes pulseMesh {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.1) translate(-2%, 2%); }
}

/* Glassmorphism Classes */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-lg);
}

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* Forms & Inputs */
.input-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.input-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

textarea {
  font-family: 'ui-monospace', 'SFMono-Regular', 'Menlo', 'Monaco', 'Consolas', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  min-height: 120px;
  resize: vertical;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 12px rgba(31, 92, 229, 0.3);
}

.btn-primary:hover {
  background: var(--accent-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(31, 92, 229, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-color);
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link, .nav-btn {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-link i, .nav-btn i {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

.nav-link:hover i, .nav-btn:hover i {
  transform: translateY(-2px);
}

.nav-link:hover, .nav-link.active, .nav-btn:hover {
  color: var(--accent-color);
}

@media (max-width: 768px) {
  .navbar {
    padding: 0.75rem 1rem;
  }
  .nav-links {
    gap: 1.5rem;
  }
  .nav-link, .nav-btn {
    flex-direction: column;
    gap: 0.2rem;
    justify-content: center;
  }
  .nav-link span, .nav-label {
    font-size: 0.7rem;
    font-weight: 500;
    opacity: 0.8;
    text-align: center;
    width: 100%;
  }
  .nav-link i, .nav-btn i {
    font-size: 1.5rem;
  }
  .nav-brand span {
    display: none;
  }
}

/* Utility Animations */
.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  color: var(--accent-color);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 0.5rem 0;
}

.stat-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* File Upload Zone */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--accent-color);
  background: var(--accent-light);
}

.upload-zone i {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

/* Alerts */
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid var(--success); }
.alert-error { background: var(--error-bg); color: var(--error); border: 1px solid var(--error); }

/* Spinners */
.spinner {
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top: 3px solid #fff;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Views container */
#app {
  min-height: calc(100vh - 72px);
}
.view {
  display: none;
}
.view.active {
  display: block;
}