/* EMSI UI - Clean Professional Style (Based on Figma Design) */

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

:root {
  /* Colors - Minimal palette */
  --color-bg: #fcfcfc;
  --color-text: #212121;
  --color-text-gray: rgba(33, 33, 33, 0.62);
  --color-text-light: rgba(33, 33, 33, 0.4);
  --color-border: rgba(0, 0, 0, 0.4);
  --color-chart-bg: rgba(82, 82, 82, 0.09);
  --color-positive: #009951;
  --color-negative: #EF4444;
  
  /* EMSI Stress Level Colors */
  --color-emsi-calm: #22C55E;      /* Green - ≤ -1.0 */
  --color-emsi-normal: #3B82F6;    /* Blue - -1.0 to +1.0 */
  --color-emsi-elevated: #F59E0B;  /* Orange - +1.0 to +2.0 */
  --color-emsi-high: #EF4444;      /* Red - ≥ +2.0 */

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
  --font-serif: 'Domine', Georgia, serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
}

.container-narrow {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
}

/* Header */
.header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0 1rem;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 3rem;
}

.logo-link {
  display: block;
  text-decoration: none;
  line-height: 0;
}

.logo-image {
  height: 44px;
  width: auto;
  display: block;
  transition: opacity 0.2s;
}

.logo-link:hover .logo-image {
  opacity: 0.8;
}

.nav {
  display: flex;
  gap: 3rem;
  align-items: center;
  margin-left: auto;
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: opacity 0.2s;
  line-height: 1.33;
}

.nav-link:hover {
  opacity: 0.6;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: var(--space-2xl) 0;
}

/* Dashboard */
.dashboard {
  background: var(--color-bg);
}

.dashboard-content {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.15;
  text-align: center;
  margin-bottom: 2rem;
  padding-top: 0.5rem;
  letter-spacing: -0.02em;
}

/* Two Column Hero Section */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1rem;
}

.page-subtitle {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* EMSI Current Reading */
.emsi-reading {
  padding-top: 0.5rem;
}

.emsi-text {
  font-size: 1.125rem;
  line-height: 1.5;
  margin-bottom: 0;
}

.emsi-value-strong {
  font-weight: 700;
}

.emsi-value-calm {
  color: var(--color-emsi-calm);
}

.emsi-value-normal {
  color: var(--color-emsi-normal);
}

.emsi-value-elevated {
  color: var(--color-emsi-elevated);
}

.emsi-value-high {
  color: var(--color-emsi-high);
}

.emsi-status {
  font-weight: 400;
}

.emsi-change {
  font-size: 1.125rem;
  line-height: 1.5;
  margin-top: 0;
}

.change-positive {
  color: var(--color-positive);
  font-weight: 700;
}

.change-negative {
  color: var(--color-negative);
  font-weight: 700;
}

.change-neutral {
  color: var(--color-text-gray);
  font-weight: 700;
}

.emsi-updated {
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--color-text);
  margin-top: 0;
}

/* Chart Section */
.chart-section {
  padding: 0.75rem 0;
}

.chart-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.chart-container {
  position: relative;
  background: rgba(220, 220, 220, 0.35);
  border-radius: 12px;
  padding: 1.5rem 1.5rem 1rem;
  border: none;
}

.chart-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 0.5rem;
}

.chart-placeholder {
  width: 100%;
  height: 320px;
  position: relative;
}

.chart-svg {
  width: 100%;
  height: 100%;
}

.chart-menu {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-gray);
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: opacity 0.2s;
  width: 24px;
  height: 24px;
}

.chart-menu:hover {
  opacity: 0.6;
}

/* Chart Tooltip */
.chart-tooltip {
  position: absolute;
  transform: translate(-50%, -100%) translateY(-12px);
  background: #333;
  color: white;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  pointer-events: none;
  z-index: 10;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.chart-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #333;
}

.tooltip-date {
  font-weight: 600;
  margin-bottom: 0.125rem;
}

.tooltip-value {
  font-weight: 700;
}

.tooltip-value.tooltip-calm {
  color: var(--color-emsi-calm);
}

.tooltip-value.tooltip-normal {
  color: var(--color-emsi-normal);
}

.tooltip-value.tooltip-elevated {
  color: var(--color-emsi-elevated);
}

.tooltip-value.tooltip-high {
  color: var(--color-emsi-high);
}

/* Chart Grid */
.grid-label {
  font-family: var(--font-sans);
  font-size: 11px;
}

/* Chart Interactive Points */
.chart-point-hitarea {
  cursor: pointer;
}

.chart-point-hitarea:hover {
  fill: rgba(0, 0, 0, 0.05);
}

.chart-point-visible {
  pointer-events: none;
  transition: r 0.15s ease;
}

/* Vertical hover line */
.chart-hover-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(0, 0, 0, 0.3);
  pointer-events: none;
  z-index: 5;
}

/* Footer / Email Signup */
.footer {
  background: var(--color-bg);
  padding: 2rem 0 2rem;
  margin-top: 0;
}

.email-signup {
  text-align: center;
  margin-bottom: 3rem;
}

.signup-heading {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.signup-form {
  display: flex;
  gap: 0.75rem;
  max-width: 600px;
  margin: 0 auto;
  justify-content: center;
}

.email-input {
  flex: 1;
  max-width: 400px;
  padding: 0.625rem 1rem;
  border: 1.5px solid transparent;
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-sans);
  background: rgba(220, 220, 220, 0.35);
  line-height: 1.5;
}

.email-input:focus {
  outline: none;
  border-color: var(--color-text-gray);
}

.email-input::placeholder {
  color: var(--color-text-light);
}

.subscribe-button {
  padding: 0.625rem 1.25rem;
  background: black;
  color: var(--color-bg);
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
  line-height: 1.5;
}

.subscribe-button:hover {
  opacity: 0.9;
}

.subscribe-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.subscribe-message {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  text-align: center;
}

.subscribe-message.success {
  color: #22C55E;
}

.subscribe-message.error {
  color: #EF4444;
}

.social-links {
  text-align: center;
  margin-top: 3rem;
}

.social-icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  color: var(--color-text);
  transition: opacity 0.2s;
}

.social-icon:hover {
  opacity: 0.6;
}

.social-icon svg {
  width: 100%;
  height: 100%;
}

/* Loading State */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-3xl) 0;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-text);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Error State */
.error-state {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-negative);
}

/* No Data */
.no-data {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-gray);
}

/* Methodology Page */
.methodology-view {
  padding: var(--space-md) 0 var(--space-md);
}

.method-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-2xl);
  letter-spacing: -0.02em;
}

.method-section {
  margin-bottom: var(--space-2xl);
}

.method-heading {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  letter-spacing: -0.01em;
}

.method-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.method-section p {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.emphasis {
  font-style: italic;
  color: var(--color-text-gray);
  border-left: 3px solid var(--color-border);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
}

.note {
  font-size: 0.9375rem;
  color: var(--color-text-gray);
  font-style: italic;
  margin-top: var(--space-md);
}

.dimension-list,
.cadence-list,
.version-list {
  margin: var(--space-sm) 0 var(--space-md);
  padding-left: var(--space-lg);
}

.dimension-list li,
.cadence-list li,
.version-list li {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: var(--space-xs);
}

.components-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.component-detail {
  background: rgba(220, 220, 220, 0.25);
  padding: var(--space-md);
  border-radius: 8px;
}

.component-detail h3 {
  margin-bottom: var(--space-xs);
}

.component-detail p {
  margin-bottom: 0;
  color: var(--color-text-gray);
}

/* Scale Guide - Methodology */
.scale-guide {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.scale-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-md);
  border-radius: 8px;
  text-align: center;
}

.scale-item .range {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--space-xs);
}

.scale-item .label {
  font-size: 0.875rem;
  font-weight: 600;
}

.scale-calm {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid var(--color-emsi-calm);
}

.scale-calm .range,
.scale-calm .label {
  color: var(--color-emsi-calm);
}

.scale-normal {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid var(--color-emsi-normal);
}

.scale-normal .range,
.scale-normal .label {
  color: var(--color-emsi-normal);
}

.scale-elevated {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid var(--color-emsi-elevated);
}

.scale-elevated .range,
.scale-elevated .label {
  color: var(--color-emsi-elevated);
}

.scale-high {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--color-emsi-high);
}

.scale-high .range,
.scale-high .label {
  color: var(--color-emsi-high);
}

/* Limitations Section */
.limitations-section {
  background: rgba(220, 220, 220, 0.35);
  padding: var(--space-lg);
  border-radius: 12px;
  border-left: 4px solid var(--color-text-gray);
}

.limitations-section .method-heading {
  margin-bottom: var(--space-sm);
}

.limitations-section p {
  margin-bottom: 0;
  color: var(--color-text-gray);
}

/* About Page */
.about-view {
  padding: var(--space-md) 0 var(--space-md);
}

.about-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.about-section {
  margin-bottom: var(--space-md);
}

.about-heading {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.about-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.about-section p {
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: var(--space-xs);
}

.about-section p:last-child {
  margin-bottom: 0;
}

.about-list {
  margin: var(--space-xs) 0;
  padding-left: var(--space-lg);
}

.about-list li {
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 0.125rem;
}

.coverage-item {
  background: rgba(220, 220, 220, 0.25);
  padding: var(--space-sm);
  border-radius: 8px;
  margin-bottom: var(--space-xs);
}

.coverage-item h3 {
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.coverage-item p {
  margin-bottom: 0;
  color: var(--color-text-gray);
}

/* Contact Section */
.contact-section {
  background: rgba(220, 220, 220, 0.35);
  padding: var(--space-md);
  border-radius: 12px;
  text-align: center;
  margin-top: var(--space-sm);
}

.contact-section .about-heading {
  margin-bottom: var(--space-xs);
}

.contact-section p {
  margin-bottom: var(--space-xs);
}

.contact-email {
  margin-bottom: 0;
}

.contact-email a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: opacity 0.2s;
}

.contact-email a:hover {
  opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    text-align: center;
  }

  .logo-link {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-xs);
  }

  .nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm) var(--space-md);
    margin-left: 0;
  }

  .nav-link {
    font-size: 0.875rem;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding: var(--space-md) 0;
  }

  .page-title {
    font-size: 2rem;
  }

  .page-subtitle {
    font-size: 1.25rem;
  }

  .emsi-text,
  .emsi-change,
  .emsi-updated {
    font-size: 1rem;
  }

  .signup-form {
    flex-direction: column;
    align-items: center;
    max-width: 100%;
  }

  .email-input {
    width: 100%;
    max-width: 100%;
  }

  .subscribe-button {
    width: 100%;
  }

  .main-content {
    padding: var(--space-lg) 0;
  }

  .chart-placeholder {
    height: 280px;
  }
}

@media (max-width: 480px) {
  .container,
  .container-narrow {
    padding: 0 var(--space-md);
  }

  .page-title {
    font-size: 1.75rem;
  }
}