/* ===== CSS Variables ===== */
:root {
  --color-bg: #0f172a;
  --color-bg-card: #1e293b;
  --color-bg-hover: #334155;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #10b981;
  --color-success-hover: #059669;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-warning: #f59e0b;
  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
  --transition: all 0.2s ease;
}

/* ===== Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  padding: 40px 20px;
  line-height: 1.6;
}

/* ===== Container ===== */
body > h1,
body > nav,
body > form,
body > section,
body > a {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

/* ===== Navigation ===== */
nav {
  display: flex;
  gap: 12px;
  margin-bottom: 28px !important;
  flex-wrap: wrap;
}

nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
  color: white !important;
  text-decoration: none !important;
  border-radius: var(--radius-sm) !important;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

nav a:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* ===== Typography ===== */
h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 32px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  letter-spacing: -0.02em;
}

.container h1 {
  text-align: left;
  margin-bottom: 24px;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== Section Cards ===== */
section {
  background: var(--color-bg-card);
  padding: 28px;
  border-radius: var(--radius);
  margin-bottom: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

section:hover {
  box-shadow: var(--shadow-lg);
}

/* ===== Search Form ===== */
body > form {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  max-width: 1000px;
}

body > form input[type="text"] {
  flex: 1;
  padding: 14px 18px;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 15px;
  transition: var(--transition);
}

body > form input[type="text"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

body > form input[type="text"]::placeholder {
  color: var(--color-text-muted);
}

body > form button {
  padding: 14px 28px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

body > form button:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* ===== Edit/Add Form ===== */
section form,
body > form:has(label) {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Forms inside body (edit page) */
body > h1 + form {
  max-width: 500px;
  background: var(--color-bg-card);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

body > h1 + form label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: -12px;
}

body > h1 + form input[type="text"] {
  padding: 14px 18px;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  transition: var(--transition);
}

body > h1 + form input[type="text"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

body > h1 + form button {
  padding: 14px 28px;
  background: var(--color-success);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 8px;
}

body > h1 + form button:hover {
  background: var(--color-success-hover);
  transform: translateY(-1px);
}

/* ===== Login Page ===== */
.login-container,
body:has(form input[name="username"]) {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

body:has(form input[name="username"]) {
  flex-direction: column;
  gap: 0;
}

body:has(form input[name="username"]) h1 {
  margin-bottom: 0;
}

body:has(form input[name="username"]) > form {
  width: 100%;
  max-width: 400px;
  background: var(--color-bg-card);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

body:has(form input[name="username"]) > form > div {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

body:has(form input[name="username"]) > form label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

body:has(form input[name="username"]) > form input[type="text"],
body:has(form input[name="username"]) > form input[type="password"] {
  padding: 14px 18px;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 15px;
  transition: var(--transition);
  width: 100%;
}

body:has(form input[name="username"]) > form input[type="text"]:focus,
body:has(form input[name="username"]) > form input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
}

body:has(form input[name="username"]) > form button {
  padding: 16px 28px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin-top: 8px;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

body:has(form input[name="username"]) > form button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Login Error Message */
body:has(form input[name="username"]) > p {
  max-width: 400px;
  margin: 0 auto 16px;
  padding: 12px 16px;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-sm);
  color: #f87171;
  font-size: 14px;
  text-align: center;
}

/* ===== Add Button ===== */
.btn-add {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.btn-add:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
  color: white;
  text-decoration: none;
}

/* ===== Table ===== */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 16px;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

thead {
  background: linear-gradient(135deg, var(--color-bg) 0%, #1a1f35 100%);
}

th {
  padding: 16px 20px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
  vertical-align: middle;
}

tbody tr {
  transition: var(--transition);
}

tbody tr:hover {
  background: var(--color-bg-hover);
}

tbody tr:last-child td {
  border-bottom: none;
}

/* ===== Action Links ===== */
td a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  margin-right: 8px;
}

td a:first-of-type {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
}

td a:first-of-type:hover {
  background: rgba(59, 130, 246, 0.25);
  color: #93c5fd;
}

td a:last-of-type {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

td a:last-of-type:hover {
  background: rgba(239, 68, 68, 0.25);
  color: #fca5a5;
}

/* ===== Back Link ===== */
body > a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding: 12px 20px;
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

body > a:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
  text-decoration: none;
}

/* ===== Progress Bar ===== */
.progress-bar {
  background: var(--color-bg);
  border-radius: 6px;
  overflow: hidden;
  height: 24px;
  width: 150px;
  border: 1px solid var(--color-border);
}

.progress-fill {
  background: linear-gradient(135deg, var(--color-success) 0%, #34d399 100%);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 600;
  transition: width 0.4s ease;
  min-width: fit-content;
  padding: 0 8px;
}

/* ===== Back Link (Stats page) ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 12px 20px;
  background: var(--color-bg-hover);
  color: var(--color-text) !important;
  text-decoration: none !important;
  border-radius: var(--radius-sm) !important;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.back-link:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}

/* ===== Code Element ===== */
code {
  background: var(--color-bg);
  padding: 4px 10px;
  border-radius: 6px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  color: var(--color-warning);
  border: 1px solid var(--color-border);
}

/* ===== No Data State ===== */
.no-data {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
}

.no-data p {
  font-size: 16px;
  margin: 0;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ===== Selection ===== */
::selection {
  background: var(--color-primary);
  color: white;
}

/* ===== Responsive - Tablet ===== */
@media (max-width: 768px) {
  body {
    padding: 24px 16px;
  }

  h1 {
    font-size: 1.75rem;
    margin-bottom: 24px;
  }

  h2 {
    font-size: 1.125rem;
  }

  section {
    padding: 24px;
    margin-bottom: 24px;
  }

  .container {
    padding: 24px;
  }

  nav {
    gap: 10px;
  }

  nav a {
    padding: 10px 16px;
    font-size: 13px;
  }

  th, td {
    padding: 14px 16px;
  }

  body > h1 + form {
    padding: 24px;
  }

  body:has(form input[name="username"]) > form {
    padding: 32px;
  }
}

/* ===== Responsive - Mobile ===== */
@media (max-width: 640px) {
  body {
    padding: 16px 12px;
  }

  h1 {
    font-size: 1.5rem;
    margin-bottom: 20px;
  }

  h2 {
    font-size: 1rem;
    flex-wrap: wrap;
  }

  section {
    padding: 20px 16px;
    margin-bottom: 20px;
    border-radius: var(--radius-sm);
  }

  .container {
    padding: 20px 16px;
    border-radius: var(--radius-sm);
  }

  /* Navigation mobile */
  nav {
    flex-direction: column;
    gap: 8px;
  }

  nav a {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }

  /* Search form mobile */
  body > form {
    flex-direction: column;
  }

  body > form button {
    width: 100%;
    padding: 16px;
  }

  body > form input[type="text"] {
    padding: 16px;
  }

  /* Table mobile */
  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  th, td {
    padding: 12px 14px;
    font-size: 14px;
    white-space: nowrap;
  }

  td a {
    padding: 6px 10px;
    font-size: 12px;
    margin-right: 6px;
  }

  /* Edit form mobile */
  body > h1 + form {
    max-width: 100%;
    padding: 20px;
  }

  body > h1 + form input[type="text"] {
    padding: 16px;
  }

  body > h1 + form button {
    padding: 16px;
  }

  /* Login mobile */
  body:has(form input[name="username"]) > form {
    padding: 24px 20px;
    max-width: 100%;
  }

  body:has(form input[name="username"]) > form input[type="text"],
  body:has(form input[name="username"]) > form input[type="password"] {
    padding: 16px;
  }

  body:has(form input[name="username"]) > form button {
    padding: 18px;
  }

  body:has(form input[name="username"]) > p {
    max-width: 100%;
  }

  /* Progress bar mobile */
  .progress-bar {
    width: 120px;
    height: 22px;
  }

  .progress-fill {
    font-size: 11px;
  }

  /* Back link mobile */
  body > a,
  .back-link {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }

  /* Add button mobile */
  .btn-add {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
  }
}

/* ===== Responsive - Small Mobile ===== */
@media (max-width: 380px) {
  body {
    padding: 12px 10px;
  }

  h1 {
    font-size: 1.25rem;
  }

  section,
  .container {
    padding: 16px 12px;
  }

  th, td {
    padding: 10px 12px;
    font-size: 13px;
  }

  body:has(form input[name="username"]) > form {
    padding: 20px 16px;
    gap: 20px;
  }
}