/* BASE — Reset, Variables, Typography, Layout, Buttons, Forms */

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

:root {
    --bg-dark: #0f1117;
    --bg-card: #1a1d27;
    --bg-shelf: #2a2d3a;
    --border: #333648;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --accent: #4a9eff;
    --accent-green: #34d399;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --shelf-metal: #5a5e70;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* HEADER */
.header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.header h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--accent);
    white-space: nowrap;
}
.header h1 span { color: var(--text-secondary); font-weight: 400; }
.header-controls { display: flex; gap: 8px; align-items: center; }
.header-actions { display: flex; gap: 12px; align-items: center; }

/* LAYOUT */
.app-layout {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 60px);
}

/* INPUT PANEL — equipment config form */
.input-panel {
    background: var(--bg-card);
    padding: 0 24px;
    overflow: hidden;
}
.input-panel:has(.equipment-config-panel.open) {
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}
.equipment-config-panel {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.2s ease, margin 0.3s ease;
    margin-top: 0;
}
.equipment-config-panel.open {
    max-height: 700px;
    opacity: 1;
    margin-top: 10px;
}
.form-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    flex-wrap: wrap;
}
.config-actions {
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.config-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-shelf);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.config-toggle:hover { background: var(--border); color: var(--text-primary); }
.config-toggle.active { border-color: var(--accent); color: var(--accent); background: rgba(74,158,255,0.08); }
.config-toggle .toggle-caret {
    font-size: 8px;
    transition: transform 0.3s;
}
.config-toggle.active .toggle-caret { transform: rotate(180deg); }
.form-group { display: flex; flex-direction: column; gap: 3px; }
.form-group label {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    font-weight: 600;
}
.form-group select,
.form-group input[type="number"] {
    padding: 7px 10px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s;
    min-width: 80px;
}
.form-group select { min-width: 120px; }
.form-group select:focus,
.form-group input[type="number"]:focus { border-color: var(--accent); }
.action-row {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: nowrap;
    overflow-x: auto;
}
.step-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 8px;
    border-radius: 4px;
    line-height: 1;
    flex-shrink: 0;
    white-space: nowrap;
}
.step-label.s1 { background: rgba(74,158,255,0.15); color: var(--accent); }
.step-label.s2 { background: rgba(52,211,153,0.15); color: var(--accent-green); }
.action-divider {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 2px;
    flex-shrink: 0;
}
.btn-green { background: var(--accent-green); color: #0f1117; font-weight: 600; }
.btn-green:hover { background: #2bc48a; }
.btn-green:disabled { opacity: 0.4; cursor: not-allowed; }

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #3a8eef; }
.btn-secondary { background: var(--bg-shelf); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }