/* ==========================================================================
   Crypto Bot Dashboard — Main Stylesheet
   Dark theme, mobile-first responsive layout
   ========================================================================== */

/* ---------- CSS Variables / Theme ---------- */
:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #0f3460;
  --accent: #e94560;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --success: #00d4aa;
  --warning: #ffd700;
  --danger: #ff4757;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: #ff6b81;
}

img {
  max-width: 100%;
  height: auto;
}

code, pre {
  font-family: var(--font-mono);
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-normal);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 1rem;
}

.card-header .card-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.card-header .card-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

/* ---------- Tables ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table thead {
  background: rgba(0, 0, 0, 0.2);
}

.data-table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

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

/* Responsive table wrapper */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ---------- Forms ---------- */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-family: var(--font-family);
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.form-control::placeholder {
  color: rgba(160, 160, 176, 0.5);
}

.form-control:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a0a0b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

.form-text {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.form-inline {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-family: var(--font-family);
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              box-shadow var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-sm {
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 0.65rem 1.5rem;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background: #d63b55;
  border-color: #d63b55;
}

.btn-success {
  background: var(--success);
  border-color: var(--success);
  color: #0a1a14;
}

.btn-success:hover {
  background: #00b894;
  border-color: #00b894;
}

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

.btn-danger:hover {
  background: #e0394a;
  border-color: #e0394a;
}

.btn-warning {
  background: var(--warning);
  border-color: var(--warning);
  color: #1a1a2e;
}

.btn-warning:hover {
  background: #e6c200;
  border-color: #e6c200;
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--text-primary);
}

.btn-icon {
  padding: 0.4rem;
  line-height: 1;
}

.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.btn-group .btn + .btn {
  border-left: none;
}

/* ---------- Modals ---------- */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 560px;
  max-height: 85vh;
  overflow-y: auto;
  animation: modalSlideIn 200ms ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

/* ---------- Tabs ---------- */
.tabs {
  margin-bottom: var(--spacing-lg);
}

.tab-nav {
  display: flex;
  gap: 2px;
  border-bottom: 2px solid var(--border-color);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: 0.6rem 1.2rem;
  font-size: 0.875rem;
  font-family: var(--font-family);
  font-weight: 500;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: tabFadeIn 200ms ease;
}

@keyframes tabFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ---------- Toast Notifications ---------- */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.25rem;
  min-width: 280px;
  max-width: 420px;
  font-size: 0.875rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  pointer-events: auto;
  animation: toastSlideIn 300ms ease-out;
}

.toast.removing {
  animation: toastSlideOut 250ms ease-in forwards;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toastSlideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast-success {
  border-left: 4px solid var(--success);
}

.toast-error {
  border-left: 4px solid var(--danger);
}

.toast-warning {
  border-left: 4px solid var(--warning);
}

.toast-info {
  border-left: 4px solid var(--accent);
}

.toast-close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0.15rem;
}

.toast-close:hover {
  color: var(--text-primary);
}

/* ---------- Badges / Pills ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.55rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 999px;
  text-transform: uppercase;
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.badge-success {
  background: rgba(0, 212, 170, 0.15);
  color: var(--success);
}

.badge-warning {
  background: rgba(255, 215, 0, 0.15);
  color: var(--warning);
}

.badge-danger {
  background: rgba(255, 71, 87, 0.15);
  color: var(--danger);
}

.badge-info {
  background: rgba(233, 69, 96, 0.15);
  color: var(--accent);
}

/* ---------- Layout Utilities ---------- */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-end {
  justify-content: flex-end;
}

.flex-1 {
  flex: 1;
}

.grid {
  display: grid;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Gap utilities */
.gap-xs  { gap: var(--spacing-xs); }
.gap-sm  { gap: var(--spacing-sm); }
.gap-md  { gap: var(--spacing-md); }
.gap-lg  { gap: var(--spacing-lg); }
.gap-xl  { gap: var(--spacing-xl); }

/* Margin-top utilities */
.mt-0    { margin-top: 0; }
.mt-xs   { margin-top: var(--spacing-xs); }
.mt-sm   { margin-top: var(--spacing-sm); }
.mt-md   { margin-top: var(--spacing-md); }
.mt-lg   { margin-top: var(--spacing-lg); }
.mt-xl   { margin-top: var(--spacing-xl); }
.mt-2xl  { margin-top: var(--spacing-2xl); }

/* Margin-bottom utilities */
.mb-0    { margin-bottom: 0; }
.mb-xs   { margin-bottom: var(--spacing-xs); }
.mb-sm   { margin-bottom: var(--spacing-sm); }
.mb-md   { margin-bottom: var(--spacing-md); }
.mb-lg   { margin-bottom: var(--spacing-lg); }
.mb-xl   { margin-bottom: var(--spacing-xl); }
.mb-2xl  { margin-bottom: var(--spacing-2xl); }

/* Padding utilities */
.p-sm  { padding: var(--spacing-sm); }
.p-md  { padding: var(--spacing-md); }
.p-lg  { padding: var(--spacing-lg); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }

/* Text utilities */
.text-center   { text-align: center; }
.text-right    { text-align: right; }
.text-muted    { color: var(--text-secondary); }
.text-success  { color: var(--success); }
.text-warning  { color: var(--warning); }
.text-danger   { color: var(--danger); }
.text-accent   { color: var(--accent); }
.text-sm       { font-size: 0.875rem; }
.text-xs       { font-size: 0.75rem; }
.text-lg       { font-size: 1.125rem; }
.font-bold     { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-mono     { font-family: var(--font-mono); }

/* Misc utilities */
.w-full      { width: 100%; }
.truncate    { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden      { display: none !important; }
.sr-only     { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
.relative    { position: relative; }
.overflow-auto { overflow: auto; }

/* ---------- Confirm Dialog ---------- */
.confirm-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.confirm-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  width: 90%;
  max-width: 400px;
  text-align: center;
  animation: modalSlideIn 200ms ease-out;
}

.confirm-box p {
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
  line-height: 1.5;
}

.confirm-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

/* ---------- Loading Spinner ---------- */
.spinner {
  display: inline-block;
  width: 1.2em;
  height: 1.2em;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Responsive Breakpoints ---------- */

/* Tablet and up (>=768px) */
@media (min-width: 768px) {
  .grid-cols-2-md {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-cols-3-md {
    grid-template-columns: repeat(3, 1fr);
  }

  .hide-mobile {
    display: initial;
  }
}

/* Desktop and up (>=1024px) */
@media (min-width: 1024px) {
  .grid-cols-3-lg {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid-cols-4-lg {
    grid-template-columns: repeat(4, 1fr);
  }

  .hide-tablet {
    display: initial;
  }
}

/* Mobile-only helpers */
@media (max-width: 767px) {
  .hide-mobile {
    display: none !important;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .modal-content {
    width: 95%;
    max-height: 90vh;
  }

  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
  }

  .toast {
    min-width: auto;
    max-width: 100%;
  }

  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .data-table {
    font-size: 0.8rem;
  }

  .data-table th,
  .data-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

@media (max-width: 1023px) {
  .hide-tablet {
    display: none !important;
  }
}