:root {
    --bg-color: #0f1115;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --panel-bg: rgba(20, 24, 31, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    overflow: hidden;
}

#canvas-container {
    position: absolute; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 1;
}

/* ---- Main UI Panel ---- */
#ui-overlay {
    position: absolute; top: 2rem; left: 2rem; z-index: 10;
    background: var(--panel-bg);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    padding: 1.5rem; border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    min-width: 300px;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

#ui-overlay.collapsed {
    min-width: auto; padding: 0.75rem;
}
#ui-overlay.collapsed .panel-content { display: none; }

#ui-overlay.hidden {
    opacity: 0; pointer-events: none; transform: translateX(-20px);
}

.title {
    font-size: 1.25rem; font-weight: 600; margin-bottom: 0.25rem;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 1.25rem;
    font-style: italic; letter-spacing: 0.01em;
    transition: opacity 0.3s;
}

.controls { display: flex; flex-direction: column; gap: 0.85rem; }
.control-group { display: flex; flex-direction: column; gap: 0.4rem; }

label { font-size: 0.8rem; color: var(--text-secondary); font-weight: 500; }

.styled-input {
    appearance: none; background-color: rgba(0, 0, 0, 0.5); color: var(--text-primary);
    border: 1px solid var(--border-color); padding: 0.65rem 0.85rem;
    border-radius: 6px; font-size: 0.85rem; outline: none; width: 100%;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

select.styled-input {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 0.75rem center; background-size: 1em;
}
select.styled-input option { background: #14181f; color: var(--text-primary); }

.styled-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2); }

/* ---- Buttons ---- */
.button-row { display: flex; gap: 0.5rem; }

button {
    flex: 1; background-color: var(--accent); color: white; border: none;
    padding: 0.65rem 0.75rem; border-radius: 6px; font-size: 0.8rem;
    font-weight: 500; cursor: pointer; transition: background-color 0.2s ease, transform 0.1s ease;
}
button:hover { background-color: var(--accent-hover); }
button:active { transform: scale(0.97); }

.btn-secondary {
    background: rgba(255,255,255,0.08); color: var(--text-secondary); font-size: 0.75rem;
}
.btn-secondary:hover { background: rgba(255,255,255,0.15); color: white; }

.btn-tertiary {
    background: transparent; color: var(--text-secondary); font-size: 0.7rem;
    border: 1px dashed var(--border-color); padding: 0.5rem;
}
.btn-tertiary:hover { border-color: var(--accent); color: var(--accent); background: transparent; }

.shortcuts-hint {
    margin-top: 0.75rem; display: flex; gap: 0.75rem; justify-content: center;
    font-size: 0.6rem; color: rgba(255,255,255,0.25); letter-spacing: 0.03em;
}

/* ---- Search Dropdown ---- */
.search-wrapper { position: relative; width: 100%; }

.custom-dropdown {
    position: absolute; top: 100%; left: 0; width: 100%; max-height: 280px;
    background: #14181f; border: 1px solid var(--border-color); border-top: none;
    border-radius: 0 0 8px 8px; overflow-y: auto; z-index: 1000;
    display: none; box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}
.dropdown-category {
    padding: 8px 12px 4px; font-size: 0.65rem; color: var(--accent);
    text-transform: uppercase; font-weight: 700; letter-spacing: 0.05em;
    background: rgba(255,255,255,0.02);
}
.dropdown-item {
    padding: 7px 12px; font-size: 0.8rem; color: var(--text-primary);
    cursor: pointer; transition: background 0.15s; display: flex; justify-content: space-between;
}
.dropdown-item .friendly { color: var(--text-secondary); font-size: 0.7rem; }
.dropdown-item:hover { background: rgba(59, 130, 246, 0.2); }
.dropdown-item.selected { background: rgba(59, 130, 246, 0.4); border-left: 3px solid var(--accent); }

.custom-dropdown::-webkit-scrollbar { width: 5px; }
.custom-dropdown::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* ---- History Sidebar ---- */
#history-panel {
    position: absolute; top: 2rem; right: 2rem; z-index: 10;
    background: var(--panel-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    padding: 1rem; border-radius: 12px; border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    width: 140px; max-height: 80vh; overflow-y: auto;
    transition: opacity 0.4s ease, transform 0.4s ease;
}
#history-panel.collapsed { width: auto; padding: 0.75rem; overflow: visible; }
#history-panel.collapsed .panel-content { display: none; }
#history-panel.hidden { opacity: 0; pointer-events: none; transform: translateX(20px); }

/* Scrollbar for history panel */
#history-panel::-webkit-scrollbar { width: 5px; }
#history-panel::-webkit-scrollbar-track { background: transparent; }
#history-panel::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* ---- Panel Toggle Buttons ---- */
.panel-toggle {
    position: absolute; top: 0.6rem; right: 0.6rem;
    width: 24px; height: 24px; flex: none;
    background: rgba(255,255,255,0.06); color: var(--text-secondary);
    border: 1px solid var(--border-color); border-radius: 6px;
    font-size: 1rem; line-height: 1; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    padding: 0; transition: background 0.2s, color 0.2s;
}
.panel-toggle:hover { background: rgba(255,255,255,0.15); color: white; }
.panel-toggle-right { right: auto; left: 0.6rem; }

.history-title {
    font-size: 0.7rem; color: var(--text-secondary); text-transform: uppercase;
    font-weight: 700; letter-spacing: 0.05em; margin-bottom: 0.5rem;
}
#history-list { display: flex; flex-direction: column; gap: 0.5rem; }

.history-thumb {
    width: 100%; aspect-ratio: 5/4; border-radius: 6px;
    border: 1px solid var(--border-color); cursor: pointer; object-fit: cover;
    transition: border-color 0.2s, transform 0.2s;
}
.history-thumb:hover { border-color: var(--accent); transform: scale(1.03); }

.history-label {
    font-size: 0.55rem; color: var(--text-secondary); text-align: center;
    margin-top: -2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ---- Tooltip ---- */
#data-tooltip {
    position: absolute; background: rgba(15, 17, 21, 0.88);
    backdrop-filter: blur(8px); border: 1px solid var(--border-color);
    padding: 10px 14px; border-radius: 8px; pointer-events: none;
    z-index: 100; display: none; box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    font-size: 0.75rem; line-height: 1.5;
}
#data-tooltip .date { color: var(--text-secondary); margin-bottom: 2px; font-weight: 600; display: block; }
#data-tooltip .price { color: var(--accent-hover); font-size: 0.9rem; font-weight: 700; }
#data-tooltip .metrics { color: var(--text-secondary); margin-top: 4px; display: flex; gap: 8px; }

/* ---- Copied Flash ---- */
.copied-flash {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: rgba(59,130,246,0.9); color: white; padding: 12px 24px;
    border-radius: 8px; font-size: 0.9rem; z-index: 9999;
    animation: fadeInOut 1.5s forwards;
}
@keyframes fadeInOut {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
    20% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    80% { opacity: 1; }
    100% { opacity: 0; }
}