/* ============================================================
   PORTFOLIO OPTIMIZER — Design System
   Inspired by baseten.co's developer-focused, structured aesthetic
   ============================================================ */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ============================================================
   ROOT VARIABLES — Design Tokens
   ============================================================ */
:root {
  /* --- Color Palette --- */
  --bg-primary: #F8F8F8;
  --bg-secondary: #FFFFFF;
  --bg-elevated: #FAFAFA;
  --bg-dark: #0A0A0A;
  --bg-dark-card: #111111;

  --text-primary: #000000;
  --text-secondary: #525252;
  --text-muted: #737373;
  --text-inverse: #FFFFFF;
  --text-accent: #10B981;

  --accent-green: #10B981;
  --accent-green-hover: #059669;
  --accent-green-subtle: rgba(16, 185, 129, 0.08);
  --accent-green-glow: rgba(16, 185, 129, 0.15);

  --border-color: #E5E7EB;
  --border-dashed: #D4D4D4;
  --border-strong: #A3A3A3;

  --error: #EF4444;
  --warning: #F59E0B;
  --success: #10B981;

  /* --- Typography --- */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Fira Code', monospace;

  /* --- Spacing Scale --- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;

  /* --- Transitions --- */
  --ease-baseten: cubic-bezier(0.5, 0.2, 0.4, 1);
  --duration-fast: 150ms;
  --duration-base: 236ms;
  --duration-slow: 400ms;
  --transition-base: all 236ms cubic-bezier(0.5, 0.2, 0.4, 1);
  --transition-fast: all 150ms cubic-bezier(0.5, 0.2, 0.4, 1);

  /* --- Layout --- */
  --container-max: 1440px;
  --container-narrow: 1080px;
  --container-padding: 2rem;
  --nav-height: 56px;

  /* --- Border Radius --- */
  --radius-none: 0px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

/* --- Headings --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 600;
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* --- Body Text --- */
p {
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 640px;
}

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

.text-accent {
  color: var(--accent-green);
}

/* --- Monospace / Technical --- */
.font-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 500;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-green);
  padding: 4px 10px;
  border: 1px solid var(--accent-green);
  display: inline-block;
}

/* ============================================================
   LAYOUT — Containers
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-tight {
  padding: var(--space-3xl) 0;
}

/* ============================================================
   GRID — Blueprint Dashed Grid System
   ============================================================ */
.grid-blueprint {
  display: grid;
  border-left: 1px dashed var(--border-dashed);
  border-top: 1px dashed var(--border-dashed);
}

.grid-blueprint > * {
  border-right: 1px dashed var(--border-dashed);
  border-bottom: 1px dashed var(--border-dashed);
  padding: var(--space-xl);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ============================================================
   BORDERS & DIVIDERS — The Baseten Signature
   ============================================================ */
.border-dash {
  border: 1px dashed var(--border-dashed);
}

.border-dash-bottom {
  border-bottom: 1px dashed var(--border-dashed);
}

.border-dash-top {
  border-top: 1px dashed var(--border-dashed);
}

.border-dash-left {
  border-left: 1px dashed var(--border-dashed);
}

.border-dash-right {
  border-right: 1px dashed var(--border-dashed);
}

.border-solid {
  border: 1px solid var(--border-color);
}

.divider {
  width: 100%;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--border-dashed) 0px,
    var(--border-dashed) 4px,
    transparent 4px,
    transparent 8px
  );
  margin: var(--space-2xl) 0;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--bg-secondary);
  border: 1px dashed var(--border-dashed);
  padding: var(--space-xl);
  transition: var(--transition-base);
  position: relative;
}

.card:hover {
  border-color: var(--border-strong);
  background: var(--bg-elevated);
}

.card-dark {
  background: var(--bg-dark-card);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--text-inverse);
}

.card-dark:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: #161616;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-md);
  border-bottom: 1px dashed var(--border-dashed);
}

.card-metric {
  background: var(--bg-secondary);
  border: 1px dashed var(--border-dashed);
  padding: var(--space-lg);
  text-align: center;
}

.card-metric .metric-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.card-metric .metric-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--text-primary);
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
  border-radius: var(--radius-none);
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: var(--text-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.btn-accent {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: var(--text-primary);
}

.btn-accent:hover {
  background: var(--accent-green-hover);
  border-color: var(--accent-green-hover);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 0.875rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 248, 248, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px dashed var(--border-dashed);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent-green);
}

/* ============================================================
   FORMS
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-input {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 12px 16px;
  border: 1px dashed var(--border-dashed);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: var(--transition-base);
  outline: none;
  border-radius: var(--radius-none);
}

.form-input:focus {
  border-color: var(--accent-green);
  border-style: solid;
  box-shadow: 0 0 0 3px var(--accent-green-subtle);
}

.form-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.form-select {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 12px 16px;
  border: 1px dashed var(--border-dashed);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: var(--transition-base);
  outline: none;
  cursor: pointer;
  appearance: none;
  border-radius: var(--radius-none);
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23737373'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-select:focus {
  border-color: var(--accent-green);
  border-style: solid;
}

/* --- Ticker Boxes --- */
.ticker-box-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.ticker-box {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-dashed);
  padding: 0;
  transition: var(--transition-fast);
}

.ticker-box:focus-within {
  border-color: var(--accent-green);
  border-style: solid;
}

.ticker-box input {
  border: none;
  background: transparent;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  width: 100px;
  outline: none;
  text-transform: uppercase;
}

.ticker-remove-btn {
  border: none;
  border-left: 1px dashed var(--border-dashed);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

.ticker-remove-btn:hover {
  background: var(--error);
  color: white;
}

.btn-add-ticker {
  background: transparent;
  border: 1px dashed var(--border-dashed);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  padding: 8px 12px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition-fast);
}

.btn-add-ticker:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* ============================================================
   STATUS & BADGES
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid;
}

.badge-success {
  color: var(--success);
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.05);
}

.badge-warning {
  color: var(--warning);
  border-color: var(--warning);
  background: rgba(245, 158, 11, 0.05);
}

.badge-error {
  color: var(--error);
  border-color: var(--error);
  background: rgba(239, 68, 68, 0.05);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
  background: currentColor;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================================
   LOADING STATES
   ============================================================ */
.loading-bar {
  height: 2px;
  background: var(--border-color);
  overflow: hidden;
  position: relative;
}

.loading-bar::after {
  content: '';
  position: absolute;
  left: -50%;
  width: 50%;
  height: 100%;
  background: var(--accent-green);
  animation: loading-slide 1.2s ease-in-out infinite;
}

@keyframes loading-slide {
  0% { left: -50%; }
  100% { left: 100%; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--border-color) 25%,
    var(--bg-elevated) 50%,
    var(--border-color) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 2px;
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   CHART CONTAINERS
   ============================================================ */
.chart-container {
  border: 1px dashed var(--border-dashed);
  background: var(--bg-secondary);
  padding: var(--space-lg);
  position: relative;
}

.chart-container .chart-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px dashed var(--border-dashed);
}

/* ============================================================
   TABLES
   ============================================================ */
.table-wrapper {
  border: 1px dashed var(--border-dashed);
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.table th {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px dashed var(--border-dashed);
  background: var(--bg-elevated);
}

.table td {
  padding: 12px 16px;
  border-bottom: 1px dashed var(--border-dashed);
  color: var(--text-primary);
}

.table tr:last-child td {
  border-bottom: none;
}

.table tr:hover td {
  background: var(--accent-green-subtle);
}

/* ============================================================
   TOOLTIPS
   ============================================================ */
[data-tooltip] {
  position: relative;
  cursor: help;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  text-transform: none;
  white-space: nowrap;
  padding: 6px 12px;
  background: var(--bg-dark);
  color: var(--text-inverse);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
}

[data-tooltip]:hover::after {
  opacity: 1;
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }
.w-full { width: 100%; }
.text-center { text-align: center; }
.hidden { display: none !important; }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --container-padding: 1.5rem;
  }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

  .grid-blueprint[style] { grid-template-columns: 1fr !important; }
  .grid-blueprint > div { padding: var(--space-md) !important; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  
  .flex-col-mobile { 
    flex-direction: column !important; 
    align-items: stretch !important; 
  }

  .nav-links {
    display: none;
  }

  .section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}