:root {
  /* Marketplace Standard Color Palette (High Contrast & Trustworthy) */
  --color-primary: #2563eb;       /* Royal Blue - Trust & Authority */
  --color-primary-light: #eff6ff;
  --color-primary-dark: #1d4ed8;

  --color-secondary: #059669;     /* Emerald Green - Success & Positive Action (Donation) */
  --color-secondary-light: #ecfdf5;
  --color-secondary-dark: #047857;

  --color-accent: #f59e0b;        /* Amber - Attention & Highlights */

  --color-success: #10b981;
  --color-info: #3b82f6;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  --color-bg-main: #f8fafc;       /* Clean Light Gray Background */
  --color-bg-card: #ffffff;
  --color-bg-hover: #f1f5f9;

  --color-text-primary: #0f172a;   /* Deep Slate - Maximum Heading Contrast */
  --color-text-secondary: #334155; /* Slate 700 - High Readability Body */
  --color-text-muted: #64748b;     /* Slate 500 - Secondary info */

  --color-border: #e2e8f0;        /* Standard Slate 200 Border */

  --shadow-soft: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  --radius-main: 8px;             /* Standard Workplace Rounded Corners */
}

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

body {
  background: var(--color-bg-main);
  color: var(--color-text-secondary);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Marketplace Navbar */
nav, .navbar {
  height: 72px;
  display: flex;
  align-items: center;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav a, .navbar a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

nav a:hover, .navbar a:hover {
  color: var(--color-primary);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.025em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.auth-btns {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Button System */
.btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-main);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: 0.15s ease-in-out;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-cta {
  background: var(--color-secondary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

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

.btn-outline {
  background: #fff;
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

.btn-outline:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

/* Card System */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-main);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-medium);
}

/* Forms */
input, select, textarea {
  width: 100%;
  border-radius: var(--radius-main);
  border: 1px solid var(--color-border);
  padding: 0.625rem 0.875rem;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  background: #ffffff;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

input:focus, select:focus, textarea:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: var(--radius-main);
  margin-bottom: 1.5rem;
  font-weight: 500;
  font-size: 0.9rem;
  border: 1px solid transparent;
}

.alert-success {
  background: var(--color-secondary-light);
  border-color: #a7f3d0;
  color: var(--color-secondary-dark);
}

.alert-danger {
  background: #fef2f2;
  border-color: #fecaca;
  color: #b91c1c;
}

/* Badges */
.badge {
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-secondary-light);
  color: var(--color-secondary);
}

/* Sections */
section {
  padding: 3rem 0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.025em;
  line-height: 1.25;
}

/* Dashboard Specific Layout */
.sidebar-sticky {
  position: sticky;
  top: 96px;
  height: fit-content;
}

footer {
  padding: 3rem 0;
  background: #ffffff;
  border-top: 1px solid var(--color-border);
  margin-top: 5rem;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
}