/* ============================================================
 * StarkTrade 5.0K - style-layout.css
 * Variables, reset, app shell (header, sidebar, grid, cards),
 * view switching y breakpoints del layout base.
 * Debe cargarse SIEMPRE antes que el resto de hojas: define :root.
 * ============================================================ */

:root {
    --bg-black: #050505;
    --bg-card: #0f0f12;
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --accent-neon: #00ff41; /* Verde Neón */
    --accent-red: #ff3e3e;  /* Rojo Loss */
    --accent-ai: #9d4edd;   /* Morado IA */
    --border: #1f1f23;
}

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

body {
    background-color: var(--bg-black);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    overflow: hidden;
}

#app {
    display: grid;
    grid-template-areas:
        "header header"
        "sidebar content";
    grid-template-columns: 200px 1fr;
    grid-template-rows: 60px 1fr;
    height: 100vh;
    transition: grid-template-columns 0.3s ease;
}

#app.sidebar-collapsed {
    grid-template-columns: 70px 1fr;
}

.main-header {
    grid-area: header;
    background: var(--bg-black);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 2px;
    white-space: nowrap;
    overflow: hidden;
    transition: all 0.3s ease;
    width: auto;
}
.logo span { color: var(--accent-neon); }

#app.sidebar-collapsed .logo {
    opacity: 0;
    visibility: hidden;
    transform: translateX(-20px);
    width: 0;
}
#app.sidebar-collapsed .logo span { display: none; }

.stats { display: flex; gap: 30px; }

.stat-item .label {
    display: block;
    font-size: 0.6rem;
    color: var(--text-secondary);
}
.stat-item .value { font-size: 0.9rem; font-weight: 700; }

.sidebar {
    grid-area: sidebar;
    border-right: 1px solid var(--border);
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: width 0.3s ease;
}

.sidebar-header {
    padding: 15px;
    display: flex;
    justify-content: flex-end;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-toggle:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.sidebar nav a {
    display: flex;
    align-items: center;
    padding: 14px 23px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.72rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 15px;
    white-space: nowrap;
    border-left: 3px solid transparent;
}

.nav-icon {
    flex-shrink: 0;
    width: 20px; /* Tamaño profesional para que no sature */
    height: 20px;
    transition: all 0.3s ease;
}

.nav-text {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

/* Estado Colapsado */
#app.sidebar-collapsed .nav-text {
    opacity: 0;
    display: none; /* Eliminamos del DOM visual para evitar amontonamiento */
}

#app.sidebar-collapsed .sidebar-header {
    justify-content: center;
    padding: 15px 0;
}

#app.sidebar-collapsed nav a {
    justify-content: center;
    padding: 16px 0;
    gap: 0;
}

#app.sidebar-collapsed .nav-icon {
    width: 22px;
    height: 22px;
}

.sidebar nav a.active,
.sidebar nav a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
    border-left-color: var(--accent-neon);
}

#app.sidebar-collapsed nav a.active,
#app.sidebar-collapsed nav a:hover {
    border-left-width: 4px;
}

.content {
    grid-area: content;
    padding: 20px;
    overflow-y: auto;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 15px;
    border-radius: 4px;
}
.card.wide { grid-column: span 2; }

h3 {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    border-left: 3px solid var(--accent-ai);
    padding-left: 10px;
}

/* ─── View Switching ────────────────────────────────────────── */
.view { display: none; }
.view.active { display: block; }

/* ─── Asset Filter (header stat-item) ───────────────────────── */
.asset-filter-select {
    background: #07070a;
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 3px;
    padding: 4px 22px 4px 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--accent-neon) 50%),
                      linear-gradient(135deg, var(--accent-neon) 50%, transparent 50%);
    background-position: calc(100% - 12px) 50%, calc(100% - 7px) 50%;
    background-size: 5px 5px;
    background-repeat: no-repeat;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.asset-filter-select:focus,
.asset-filter-select:hover {
    outline: none;
    border-color: var(--accent-neon);
    box-shadow: 0 0 6px rgba(0, 255, 200, 0.35);
}
.asset-filter-select option { background: #07070a; color: var(--text-primary); }

/* ─── Pair Cards en Sidebar (Multi-Pair Mini) ───────────────── */
.pair-cards-strip {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    margin: 0;
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}
.pair-cards-strip.pair-cards-strip--empty { display: none; }
.pair-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 8px 10px;
    color: var(--text-primary);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    text-align: left;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.pair-card:hover { border-color: var(--accent-neon); box-shadow: 0 0 6px rgba(0, 255, 200, 0.25); }
.pair-card--active { border-color: var(--accent-neon); box-shadow: 0 0 8px rgba(0, 255, 200, 0.4) inset; }
.pair-card-head { display: flex; justify-content: space-between; align-items: center; }
.pair-card-sym { font-size: 0.72rem; font-weight: 700; letter-spacing: 1px; color: var(--text-secondary); }
.pair-card-trend { font-size: 0.9rem; line-height: 1; }
.pair-card-price { font-size: 0.95rem; font-weight: 700; margin: 3px 0 4px 0; }
.pair-card-meta { display: flex; justify-content: space-between; font-size: 0.65rem; opacity: 0.85; }
.pair-card-pnl { font-weight: 700; }
.pair-card-icon { display: none; font-size: 0.72rem; font-weight: 700; letter-spacing: 1px; text-align: center; color: var(--accent-neon); }
/* Sidebar colapsado → solo el ticker (BTC/ETH/SOL) por card */
#app.sidebar-collapsed .pair-cards-strip { padding: 8px 4px; }
#app.sidebar-collapsed .pair-card { padding: 7px 0; }
#app.sidebar-collapsed .pair-card-head,
#app.sidebar-collapsed .pair-card-price,
#app.sidebar-collapsed .pair-card-meta { display: none; }
#app.sidebar-collapsed .pair-card-icon { display: block; }

/* NOTA: Las media queries se han movido a style-responsive.css para cumplir la Regla de Oro. */