/* ===== CSS Custom Properties ===== */
:root {
    --primary: #E535AB;
    --primary-dim: rgba(229, 53, 171, 0.15);
    --secondary: #6C63FF;
    --secondary-dim: rgba(108, 99, 255, 0.15);
    --accent: #00D4AA;
    --accent-dim: rgba(0, 212, 170, 0.15);
    --warning: #FFB020;
    --warning-dim: rgba(255, 176, 32, 0.15);
    --danger: #FF4D6A;
    --danger-dim: rgba(255, 77, 106, 0.15);
    --success: #00D4AA;

    --bg-primary: #0B0D17;
    --bg-secondary: #111424;
    --bg-elevated: #181B2E;
    --bg-card: rgba(24, 27, 46, 0.7);
    --bg-input: rgba(11, 13, 23, 0.8);

    --text-primary: #E8E9F0;
    --text-secondary: #8B8FA3;
    --text-muted: #555872;

    --border: rgba(139, 143, 163, 0.12);
    --border-focus: var(--primary);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(229, 53, 171, 0.15);

    --glass-bg: rgba(24, 27, 46, 0.6);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-blur: 16px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Reset ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(229, 53, 171, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(108, 99, 255, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== App Container ===== */
.app-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.app-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 13, 23, 0.85);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    background: var(--primary-dim);
    border: 1px solid rgba(229, 53, 171, 0.2);
    flex-shrink: 0;
}

.app-title {
    font-size: 1.125rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.app-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.2;
}

.header-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 2px 12px rgba(229, 53, 171, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 4px 20px rgba(229, 53, 171, 0.45);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: rgba(139, 143, 163, 0.25);
}

.btn-icon {
    padding: 8px;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ===== Panels ===== */
.editor-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.panel {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.15);
}

.panel-title {
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.panel-badge {
    font-size: 0.6875rem;
    padding: 3px 10px;
    border-radius: 20px;
    background: var(--accent-dim);
    color: var(--accent);
    font-weight: 500;
}

/* ===== Code Editor ===== */
.editor-wrapper {
    position: relative;
    flex: 1;
}

.code-editor {
    width: 100%;
    min-height: 280px;
    padding: 16px 18px;
    background: var(--bg-input);
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    tab-size: 2;
    white-space: pre;
    overflow-x: auto;
    transition: box-shadow var(--transition-fast);
}

.code-editor::placeholder {
    color: var(--text-muted);
}

.code-editor:focus {
    box-shadow: inset 0 0 0 1px var(--primary);
}

.editor-line-count {
    position: absolute;
    bottom: 8px;
    right: 12px;
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ===== Results Section ===== */
.results-section {
    animation: fadeSlideUp 0.5s var(--transition-slow) both;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Cost Cards ===== */
.cost-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.cost-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.cost-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, transparent, rgba(229, 53, 171, 0.15), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.cost-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.cost-card-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
    font-weight: 500;
}

.cost-card-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cost-card-sub {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.cost-card-meter {
    margin-top: 12px;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    width: 0%;
}

.meter-fill.low {
    background: linear-gradient(90deg, var(--accent), #00E5BB);
}

.meter-fill.medium {
    background: linear-gradient(90deg, var(--warning), #FFC845);
}

.meter-fill.high {
    background: linear-gradient(90deg, var(--danger), #FF6B82);
}

.cost-card.severity-low .cost-card-value {
    background: linear-gradient(135deg, var(--accent), #00E5BB);
    -webkit-background-clip: text;
    background-clip: text;
}

.cost-card.severity-medium .cost-card-value {
    background: linear-gradient(135deg, var(--warning), #FFC845);
    -webkit-background-clip: text;
    background-clip: text;
}

.cost-card.severity-high .cost-card-value {
    background: linear-gradient(135deg, var(--danger), #FF6B82);
    -webkit-background-clip: text;
    background-clip: text;
}

/* ===== Results Grid ===== */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.result-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 20px;
}

.result-title {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-icon {
    font-size: 1.125rem;
}

/* ===== Breakdown Tree ===== */
.breakdown-tree {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.tree-node {
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.tree-node:last-child {
    border-bottom: none;
}

.tree-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 0;
}

.tree-item-name {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

.tree-indent {
    color: var(--text-muted);
    user-select: none;
}

.tree-field-name {
    color: #7DD3FC;
}

.tree-type-name {
    color: var(--primary);
    font-weight: 500;
}

.tree-list-indicator {
    color: var(--warning);
    font-size: 0.6875rem;
    padding: 1px 6px;
    border-radius: 4px;
    background: var(--warning-dim);
}

.tree-item-cost {
    font-weight: 600;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    flex-shrink: 0;
}

.tree-item-cost.cost-low {
    color: var(--accent);
    background: var(--accent-dim);
}

.tree-item-cost.cost-medium {
    color: var(--warning);
    background: var(--warning-dim);
}

.tree-item-cost.cost-high {
    color: var(--danger);
    background: var(--danger-dim);
}

/* ===== Suggestions ===== */
.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.suggestion-item {
    padding: 14px 16px;
    border-radius: var(--border-radius-sm);
    border-left: 3px solid;
    transition: all var(--transition-fast);
}

.suggestion-item:hover {
    transform: translateX(4px);
}

.suggestion-item.severity-info {
    background: var(--secondary-dim);
    border-color: var(--secondary);
}

.suggestion-item.severity-warning {
    background: var(--warning-dim);
    border-color: var(--warning);
}

.suggestion-item.severity-critical {
    background: var(--danger-dim);
    border-color: var(--danger);
}

.suggestion-title {
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.suggestion-badge {
    font-size: 0.625rem;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.suggestion-badge.info {
    background: var(--secondary-dim);
    color: var(--secondary);
}

.suggestion-badge.warning {
    background: var(--warning-dim);
    color: var(--warning);
}

.suggestion-badge.critical {
    background: var(--danger-dim);
    color: var(--danger);
}

.suggestion-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== Config Panel ===== */
.config-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 20px;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.config-item label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.config-item input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: border-color var(--transition-fast);
    outline: none;
}

.config-item input:focus {
    border-color: var(--primary);
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s var(--transition-slow);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1rem;
    font-weight: 600;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.modal-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    text-align: right;
}

.history-item {
    padding: 12px 14px;
    border-radius: var(--border-radius-sm);
    background: rgba(0, 0, 0, 0.2);
    margin-bottom: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.history-item:hover {
    background: rgba(229, 53, 171, 0.08);
    border-color: rgba(229, 53, 171, 0.15);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.history-item-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.history-item-cost {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.history-item-query {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.empty-state-text {
    font-size: 0.875rem;
}

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: 16px 24px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .editor-panels {
        grid-template-columns: 1fr;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .config-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 12px 16px;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .main-content {
        padding: 16px;
    }

    .cost-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .config-grid {
        grid-template-columns: 1fr;
    }

    .code-editor {
        min-height: 200px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .cost-cards {
        grid-template-columns: 1fr;
    }

    .btn span:not(.sr-only) {
        /* Keep icon-only on very small screens if needed */
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(139, 143, 163, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(139, 143, 163, 0.35);
}

/* ===== Focus Styles ===== */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

button:focus:not(:focus-visible) {
    outline: none;
}

/* ===== Selection ===== */
::selection {
    background: rgba(229, 53, 171, 0.3);
    color: #fff;
}