/* =====================================================================
   Demo Crypto Exchange — Base Theme
   Loaded on top of Bootstrap 5. Overrides Bootstrap defaults to produce
   a dark, modern exchange look rather than default Bootstrap styling.
   ===================================================================== */

:root {
    --bg-primary: #0b0e11;
    --bg-secondary: #12161c;
    --bg-card: #161b22;
    --bg-hover: #1c222b;
    --border-color: #242a33;
    --text-primary: #f5f5f5;
    --text-secondary: #8b949e;
    --text-muted: #5c6470;
    --success: #16c784;
    --danger: #ea3943;
    --warning: #f0b90b;
    --accent: #3861fb;
    --radius: 8px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
}

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

a:hover {
    color: #5c7dfd;
}

/* ---------------------------------------------------------------
   Navigation
   --------------------------------------------------------------- */
.app-navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 1.25rem;
}

.app-navbar .navbar-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.app-navbar .navbar-brand .brand-accent {
    color: var(--accent);
}

.app-navbar .nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius);
    transition: background-color 0.15s ease, color 0.15s ease;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-hover);
}

.demo-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background-color: rgba(240, 185, 11, 0.12);
    color: var(--warning);
    border: 1px solid rgba(240, 185, 11, 0.35);
    border-radius: 999px;
    padding: 0.2rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

/* ---------------------------------------------------------------
   Cards / surfaces
   --------------------------------------------------------------- */
.card,
.app-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
}

.app-card .app-card-header {
    padding: 0.85rem 1.1rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.app-card .app-card-body {
    padding: 1.1rem;
}

.text-success-custom { color: var(--success) !important; }
.text-danger-custom  { color: var(--danger) !important; }

/* ---------------------------------------------------------------
   Tables
   --------------------------------------------------------------- */
.table-dark-exchange {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.table-dark-exchange thead th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--border-color);
    background-color: transparent;
}

.table-dark-exchange td,
.table-dark-exchange th {
    border-color: var(--border-color);
    vertical-align: middle;
}

/* ---------------------------------------------------------------
   Buttons
   --------------------------------------------------------------- */
.btn-buy {
    background-color: var(--success);
    border-color: var(--success);
    color: #0b0e11;
    font-weight: 600;
}

.btn-buy:hover {
    background-color: #13b378;
    border-color: #13b378;
    color: #0b0e11;
}

.btn-sell {
    background-color: var(--danger);
    border-color: var(--danger);
    color: #fff;
    font-weight: 600;
}

.btn-sell:hover {
    background-color: #d5313a;
    border-color: #d5313a;
    color: #fff;
}

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

.btn-outline-accent:hover {
    background-color: var(--accent);
    color: #fff;
}

/* ---------------------------------------------------------------
   Form controls
   --------------------------------------------------------------- */
.form-control,
.form-select {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--bg-secondary);
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.15rem rgba(56, 97, 251, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* ---------------------------------------------------------------
   States: loading / empty / error
   --------------------------------------------------------------- */
.state-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2.5rem 1rem;
    color: var(--text-secondary);
    text-align: center;
}

.state-panel .state-icon {
    font-size: 1.75rem;
    opacity: 0.6;
}

/* ---------------------------------------------------------------
   Footer
   --------------------------------------------------------------- */
.app-footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-muted);
    padding: 1rem 1.25rem;
    font-size: 0.8rem;
}

/* ---------------------------------------------------------------
   Toasts
   --------------------------------------------------------------- */
#toastStack {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1080;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 360px;
}

.app-toast {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.85rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.35);
    animation: toast-in 0.2s ease-out;
}

.app-toast.success { border-left-color: var(--success); }
.app-toast.error { border-left-color: var(--danger); }

@keyframes toast-in {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------------------------------------------------------------
   Loading spinner
   --------------------------------------------------------------- */
.spinner-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent);
    animation: spinner-pulse 1s infinite ease-in-out;
}

@keyframes spinner-pulse {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1.1); }
}

/* ---------------------------------------------------------------
   Small responsive tweaks
   --------------------------------------------------------------- */
@media (max-width: 991.98px) {
    .app-navbar .navbar-nav { gap: 0.25rem; }
    #toastStack { left: 1rem; right: 1rem; max-width: none; }
}

@media (max-width: 575.98px) {
    .fs-4 { font-size: 1.15rem !important; }
    .fs-5 { font-size: 1rem !important; }
}

/* ---------------------------------------------------------------
   Utility
   --------------------------------------------------------------- */
.mono {
    font-variant-numeric: tabular-nums;
    font-feature-settings: 'tnum';
}