src/assets/style.css

/* PHI-Arc Engine PHM - Global Styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

html, body, [class*="css-"] {
    font-family: 'Inter', sans-serif;
}

/* Main container adjustments */
.main .block-container {
    padding-top: 2rem;
    padding-bottom: 2rem;
    max-width: 1400px;
}

/* PHI-Arc Brand Header */
.brand-header {
    background: linear-gradient(135deg, #0a1628 0%, #1a365d 50%, #0f172a 100%);
    border-radius: 12px;
    padding: 1.5rem 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(56, 189, 248, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.brand-title {
    color: #38bdf8;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}

.brand-subtitle {
    color: #94a3b8;
    font-size: 0.9rem;
    font-weight: 400;
    margin-top: 0.25rem;
}

.brand-badge {
    display: inline-block;
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(56, 189, 248, 0.3);
    margin-top: 0.5rem;
}

/* Engine Selector Cards */
.engine-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: 10px;
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.engine-card:hover {
    border-color: rgba(56, 189, 248, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(56, 189, 248, 0.1);
}

.engine-card.selected {
    border-color: #38bdf8;
    background: linear-gradient(145deg, #1e293b, #0c4a6e);
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}

.engine-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.engine-name {
    color: #e2e8f0;
    font-weight: 600;
    font-size: 0.85rem;
}

.engine-desc {
    color: #64748b;
    font-size: 0.7rem;
    margin-top: 0.25rem;
}

/* Section Headers */
.section-header {
    color: #38bdf8;
    font-size: 1.1rem;
    font-weight: 600;
    border-left: 3px solid #38bdf8;
    padding-left: 0.75rem;
    margin: 1.5rem 0 1rem 0;
}

/* Metric Cards */
.metric-card {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border-radius: 10px;
    padding: 1rem;
    border: 1px solid rgba(148, 163, 184, 0.1);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #e2e8f0;
}

.metric-label {
    font-size: 0.75rem;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Fault Severity Indicators */
.severity-healthy { color: #22c55e; }
.severity-advisory { color: #eab308; }
.severity-warning { color: #f97316; }
.severity-critical { color: #ef4444; }

/* Progress bars */
.stProgress > div > div > div > div {
    border-radius: 10px;
}

/* Dataframes */
.stDataFrame {
    border-radius: 8px;
    overflow: hidden;
}

/* Buttons */
.stButton > button {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.stButton > button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Primary action button */
.stButton > button[kind="primary"] {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    border: none;
}

/* Tabs */
.stTabs [data-baseweb="tab-list"] {
    gap: 8px;
    background: rgba(15, 23, 42, 0.5);
    border-radius: 10px;
    padding: 0.5rem;
}

.stTabs [data-baseweb="tab"] {
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.stTabs [aria-selected="true"] {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    color: white;
}

/* Sidebar */
.css-1d391kg, .css-1lcbmhc {
    background: linear-gradient(180deg, #0f172a, #1e293b);
}

/* Expander */
.streamlit-expanderHeader {
    background: rgba(30, 41, 59, 0.5);
    border-radius: 8px;
    border: 1px solid rgba(148, 163, 184, 0.1);
}

/* Footer */
.phi-footer {
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
    color: #64748b;
    font-size: 0.8rem;
}

.phi-footer strong {
    color: #38bdf8;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .main .block-container {
        padding: 0.5rem;
    }

    .brand-title {
        font-size: 1.3rem;
    }

    .brand-subtitle {
        font-size: 0.8rem;
    }

    .metric-value {
        font-size: 1.1rem;
    }

    .section-header {
        font-size: 1rem;
    }

    /* Stack columns on mobile */
    .row-widget.stHorizontalBlock {
        flex-direction: column !important;
    }

    .row-widget.stHorizontalBlock > div {
        width: 100% !important;
        min-width: 100% !important;
        margin-bottom: 0.5rem;
    }
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #0f172a;
}

::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Code blocks */
.stCodeBlock {
    border-radius: 8px;
    border: 1px solid rgba(148, 163, 184, 0.1);
}

/* Alert boxes */
.stAlert {
    border-radius: 10px;
    border: 1px solid rgba(148, 163, 184, 0.1);
}

/* Plot containers */
.js-plotly-plot, .plotly {
    border-radius: 10px;
}