:root {
  /* Tech Blue Theme */
  --primary: #0ea5e9;       /* Sky 500 - Bright Tech Blue */
  --primary-dark: #0284c7;  /* Sky 600 */
  --primary-glow: rgba(14, 165, 233, 0.4);
  
  --success: #10b981;       /* Emerald 500 */
  --warning: #f59e0b;       /* Amber 500 */
  --danger: #ef4444;        /* Red 500 */
  
  --bg: #0f172a;            /* Slate 900 - Deep Blue Background */
  --card-bg: #1e293b;       /* Slate 800 - Panel Background */
  --header-bg: #1e293b;     /* Match card bg */
  
  --text: #f8fafc;          /* Slate 50 */
  --text-secondary: #cbd5e1;/* Slate 300 */
  --muted: #94a3b8;         /* Slate 400 */
  
  --border: #334155;        /* Slate 700 */
  --border-focus: #38bdf8;  /* Sky 400 */
  
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  background: var(--bg);
  background-image: 
    linear-gradient(rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.95)),
    linear-gradient(90deg, var(--border) 1px, transparent 1px),
    linear-gradient(var(--border) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px; /* Tech Grid Effect */
  color: var(--text);
  line-height: 1.6;
  font-size: 18px; /* Larger base font */
}

/* Header */
header {
  background: var(--header-bg);
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
nav {
  max-width: 1200px; /* Wider container */
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  color: var(--primary);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 0 10px var(--primary-glow);
}

/* Main */
main {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}
.container { width: 100%; }

h1 { font-size: 2.2rem; margin-bottom: 2rem; color: var(--text); letter-spacing: 0.5px; }
h2 { font-size: 1.5rem; margin-bottom: 1.25rem; color: var(--text-secondary); border-bottom: 2px solid var(--border); padding-bottom: 0.5rem; }
h3 { font-size: 1.25rem; margin: 1rem 0; color: var(--primary); }

/* Card */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: var(--primary-dark);
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}
.btn-primary {
  background: var(--primary);
  color: #0f172a; /* Dark text on bright button for contrast */
  box-shadow: 0 0 10px var(--primary-glow);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: white;
  box-shadow: 0 0 15px var(--primary-glow);
}
.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border-color: var(--text-secondary);
}
.btn-danger {
  background: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  border: 1px solid var(--danger);
}
.btn-danger:hover {
  background: var(--danger);
  color: white;
}
.btn-sm { padding: .4rem .8rem; font-size: .9rem; }
.btn-xs { padding: .25rem .6rem; font-size: .8rem; }
.btn-lg { font-size: 1.2rem; padding: 1rem 2rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; filter: grayscale(1); }

.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--primary);
  border-radius: 4px;
  padding: .25rem .75rem;
  font-size: .85rem;
  cursor: pointer;
  margin-left: .75rem;
  transition: all 0.2s;
}
.copy-btn:hover {
  background: var(--primary);
  color: #0f172a;
}

/* Forms */
.form-group { margin-bottom: 1.75rem; }
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: .6rem;
  font-size: 1.1rem;
  color: var(--text-secondary);
}
.form-group input[type=text],
.form-group input[type=email],
.form-group input[type=password],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .85rem 1rem;
  background: #0f172a;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1.1rem;
  color: var(--text);
  transition: all 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.25);
  background: #0b1120;
}
.form-group small {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: .5rem;
}
.required { color: var(--danger); }
.form-actions { display: flex; gap: 1rem; align-items: center; margin-top: 2rem; }

/* Collection editor */
.collection-editor {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  background: #162032; /* Slightly darker than card */
}
.collection-header { display: flex; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.col-name-input {
  flex: 1;
  padding: .75rem;
  background: #0f172a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}
.item-editor {
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 1rem;
  margin: .75rem 0;
  background: rgba(15, 23, 42, 0.5);
}
.item-header input {
  background: #0f172a;
  color: var(--text);
  border: 1px solid var(--border);
  padding: .5rem;
}
.field-row input, .field-row select {
  background: #0f172a;
  color: var(--text);
  border: 1px solid var(--border);
  padding: .5rem;
}

/* Tables */
table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 1rem; }
th {
  text-align: left;
  padding: 1rem;
  background: #162032;
  border-bottom: 2px solid var(--border);
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}
td {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  color: var(--text-secondary);
}
tr:hover td {
  background: rgba(255,255,255,0.02);
}
tr:last-child td { border-bottom: none; }

/* Alerts */
.alert {
  padding: 1rem 1.5rem;
  border-radius: 6px;
  margin-bottom: 2rem;
  font-size: 1rem;
  border-left: 4px solid;
}
.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--success);
  color: #34d399;
}
.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: #fca5a5;
}
.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
  color: #fcd34d;
}

/* Misc */
.tag {
  background: rgba(14, 165, 233, 0.2);
  color: #7dd3fc;
  border: 1px solid rgba(14, 165, 233, 0.4);
  border-radius: 4px;
  padding: .2rem .75rem;
  font-size: .9rem;
  margin-right: .5rem;
}
.badge {
  background: #1e293b;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .25rem .85rem;
  font-size: .9rem;
  color: var(--muted);
}
.hint { color: var(--muted); font-size: .95rem; margin-bottom: 1rem; font-style: italic; }
.empty-state { text-align: center; padding: 4rem; color: var(--muted); font-size: 1.1rem; }
code {
  background: #0f172a;
  border: 1px solid var(--border);
  color: #f1f5f9;
  border-radius: 4px;
  padding: .2rem .5rem;
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.95em;
}
.credential-card {
  border-left: 4px solid var(--primary);
  background: linear-gradient(90deg, rgba(14,165,233,0.05) 0%, rgba(30,41,59,0) 100%);
}
.masked {
  font-family: 'Fira Code', monospace;
  letter-spacing: .2em;
  color: var(--muted);
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
  margin-top: 4rem;
}

/* Progress Overlay */
#progressOverlay {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
}
.progress-modal {
  background: var(--card-bg);
  border: 1px solid var(--primary);
  box-shadow: 0 0 30px rgba(14, 165, 233, 0.25);
  color: var(--text);
}
.step-list .step { border: 1px solid transparent; }
.step.active {
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary);
  border-color: rgba(14, 165, 233, 0.3);
}
.spinner {
  border-color: var(--border);
  border-top-color: var(--primary);
}

/* Login Page */
body.login-page {
  background: var(--bg);
  background-image: 
    radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
    linear-gradient(rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.9)),
    linear-gradient(90deg, var(--border) 1px, transparent 1px),
    linear-gradient(var(--border) 1px, transparent 1px);
}
.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}
.login-title { color: var(--text); }
.login-footer { color: var(--muted); }