/* ============================================
   Bolt Calculator CSS
   ============================================ */

html {
    scrollbar-gutter: stable;
}

.bolt-app {
    min-height: 100vh;
    background: var(--color-bg-primary);
}

.bolt-app-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.bolt-app-header .back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.bolt-app-header .back-link:hover {
    color: var(--color-accent);
    background: var(--color-bg-tertiary);
}

.bolt-app-header .back-link svg {
    width: 18px;
    height: 18px;
    transition: transform 0.2s ease;
}

.bolt-app-header .back-link:hover svg {
    transform: translateX(-3px);
}

.bolt-app-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bolt-app-title .title-icon {
    font-size: 1.3rem;
}

.bolt-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    width: 100%;
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.82rem;
    color: var(--color-text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
}

.status-info {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    opacity: 0.8;
}

/* 3-Column Responsive Grid */
.bolt-main-grid {
    display: grid;
    grid-template-columns: 360px 1fr 380px;
    gap: 1.2rem;
    width: 100%;
    align-items: start;
}

@media (max-width: 1200px) {
    .bolt-main-grid {
        grid-template-columns: 1fr;
    }
}

.grid-col-left, .grid-col-middle, .grid-col-right {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    width: 100%;
}

.panel-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
}

.panel-section-title {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-section-title .section-icon {
    font-size: 1rem;
}

/* Inputs & Form layout */
.prop-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.prop-group {
    flex: 1;
}

.prop-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.3rem;
}

.prop-input, .prop-select {
    width: 100%;
    padding: 0.5rem 0.65rem;
    background: var(--color-bg-tertiary);
    border: 1.5px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 0.88rem;
    transition: all 0.2s ease;
}

.prop-input {
    font-family: var(--font-mono);
}

.prop-input:focus, .prop-select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
    background: var(--color-bg-secondary);
}

/* Diagram System */
.diagram-container {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.diagram-container:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.diagram-title {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.diagram-title .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.diagram-title .dot.red { background: #dc2626; }

.diagram-svg-wrap {
    width: 100%;
    display: block;
    border-radius: 8px;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
}

/* Theory Info Card */
.info-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem;
}

.info-card-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
}

.info-card-text {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.info-formula {
    background: var(--color-bg-primary);
    padding: 0.75rem;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    overflow-x: auto;
    margin-bottom: 0.75rem;
    border: 1px solid var(--color-border-light);
}

/* Results Display */
.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.result-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0.9rem 1.1rem;
    transition: transform 0.2s ease;
}

.result-card:hover {
    transform: translateY(-2px);
}

.result-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.result-value {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.result-subtitle {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    margin-top: 0.2rem;
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 0.4rem;
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-badge.danger {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}