@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
  --bg: #000000;
  --bg-subtle: #121212;
  --card: #17181b;
  --card-hover: #23252a;
  --text: #FFFFFF;
  --text-muted: #8E8E93;
  --text-dark: #000000;

  /* Brand Colors */
  --accent: #D0FF00;
  /* Nike Volt */
  --accent-glow: rgba(208, 255, 0, 0.5);
  --accent-dim: rgba(208, 255, 0, 0.1);
  --secondary: #0A84FF;
  /* Electric Blue */

  /* Status */
  --success: #32D74B;
  --warning: #FFD60A;
  --danger: #FF453A;

  /* Layout */
  --radius: 18px;
  --radius-sm: 12px;
  --header-height: 90px;

  /* Font */
  --font-head: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.backdrop {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 50% -20%, var(--accent-dim), transparent 60%),
    radial-gradient(circle at 90% 40%, rgba(10, 132, 255, 0.08), transparent 50%);
  z-index: -1;
  pointer-events: none;
}

/* Utilities */
.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

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

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

/* Typography */
h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.1;
  margin: 0;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  line-height: 1.6;
  margin: 0;
}

/* Components */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 56px;
  padding: 0 32px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-dark);
  box-shadow: 0 0 20px var(--accent-dim);
}

.btn-primary:hover {
  transform: scale(1.02);
  box-shadow: 0 0 30px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
  border-color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.badge {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.badge-volt {
  background: var(--accent-dim);
  color: var(--accent);
}

/* Forms */
.dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.dropzone input {
  display: none;
}

.dropzone:hover,
.dropzone.active {
  border-color: var(--accent);
  background: rgba(208, 255, 0, 0.05);
}

select {
  appearance: none;
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text);
  padding: 16px;
  border-radius: var(--radius-sm);
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  cursor: pointer;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

.fade-in {
  animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
}

.delay-1 {
  animation-delay: 0.1s;
}

.delay-2 {
  animation-delay: 0.2s;
}

.delay-3 {
  animation-delay: 0.3s;
}

/* Metrics */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
}

.metric-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-head);
  font-size: 22px;
  margin-bottom: 4px;
}

.metric-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

/* Score Ring */
.score-ring circle {
  transition: stroke-dashoffset 1s ease-out;
}

.meta-kicker {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.dashboard-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.app-nav {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
}

.app-nav-btn {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: transparent;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

.app-nav-btn.active {
  color: #0d1117;
  background: var(--accent);
  border-color: var(--accent);
}

.app-screen {
  display: none;
}

.app-screen.active {
  display: block;
}

.profile-card {
  position: sticky;
  top: 20px;
}

.profile-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.profile-stats {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat-tile {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  padding: 10px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-value {
  font-size: 22px;
  margin-top: 3px;
}

.profile-trend,
.profile-focus {
  margin-top: 14px;
}

.sparkline-wrap {
  margin-top: 14px;
}

.sparkline {
  margin-top: 8px;
  height: 42px;
  display: flex;
  align-items: flex-end;
  gap: 5px;
}

.spark-dot {
  width: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 1px rgba(208, 255, 0, 0.25);
}

.profile-list-head {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.history-preview {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.history-mini {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
}

.analysis-stages {
  margin-top: 14px;
  display: flex;
  gap: 14px;
  justify-content: center;
  align-items: center;
}

.stage-chip {
  position: relative;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(142, 142, 147, 0.9);
  padding: 0 0 0 14px;
  border: none;
  background: transparent;
  line-height: 1.2;
}

.stage-chip::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-50%);
}

.stage-chip.active {
  color: var(--text);
}

.stage-chip.active::before {
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(208, 255, 0, 0.12);
}

.next-plan-list {
  display: grid;
  gap: 10px;
}

.next-plan-item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  padding: 10px;
}

.next-plan-step {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #0d1117;
  background: var(--accent);
  font-weight: 600;
}

@media (max-width: 900px) {
  .dashboard-shell {
    grid-template-columns: 1fr;
  }

  .profile-card {
    position: static;
  }
}

/* V2 World-Class Overrides */
:root {
  --radius-pill: 999px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 56px;
}

.container {
  max-width: 1024px;
}

.app-shell {
  padding-top: 8vh;
  padding-bottom: 72px;
}

.top-actions {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 10;
  display: flex;
  gap: 10px;
}

.top-link {
  color: var(--text-muted);
  text-decoration: none;
  height: 42px;
  padding: 0 18px;
}

h1 {
  font-size: clamp(48px, 8vw, 72px);
  line-height: 0.92;
}

.hero {
  text-align: center;
  margin-bottom: var(--space-6);
}

.hero-badge {
  margin-bottom: 18px;
}

.hero-title {
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 24px;
  line-height: 1.35;
  max-width: 600px;
  margin: 0 auto;
}

.upload-card {
  padding: 34px;
}

.upload-error {
  color: var(--danger);
  display: none;
  margin-bottom: 16px;
}

.upload-controls {
  margin-top: var(--space-3);
}

.control-gap {
  margin-top: 12px;
}

.upload-features {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin: var(--space-4) 0;
  flex-wrap: wrap;
}

.upload-submit {
  width: 100%;
}

.progress-wrap {
  display: none;
  margin-top: var(--space-3);
}

.progress-track {
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s;
}

.progress-text {
  margin-top: 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.app-nav {
  margin-bottom: var(--space-4);
}

.session-empty-copy {
  margin-top: 10px;
}

.session-report {
  display: none;
  margin-top: 16px;
}

.report-kicker {
  margin-bottom: 10px;
}

.score-card {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 40px 34px;
}

.score-label {
  font-family: var(--font-head);
  font-size: 20px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.score-line {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.score-value {
  font-family: var(--font-head);
  font-size: clamp(92px, 18vw, 144px);
  line-height: 0.86;
  letter-spacing: -0.03em;
}

.score-summary {
  margin-top: 20px;
  max-width: 560px;
  font-size: 17px;
  line-height: 1.5;
}

.session-insight {
  margin-top: 18px;
  font-size: 18px;
  line-height: 1.45;
  max-width: 760px;
}

.media-card {
  margin-top: 18px;
  padding: 0;
  overflow: hidden;
}

.session-metrics {
  margin-top: 18px;
}

.metric-grid-spaced {
  margin-top: 24px;
}

.details-toggle-row {
  margin-top: 16px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 12px;
}

.details-toggle-btn {
  width: auto;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--text-muted);
  height: auto;
}

.breakdown {
  margin-top: 18px;
  display: none;
}

.breakdown-key {
  margin-top: 24px;
  font-size: 13px;
}

.next-plan-card {
  margin-top: 18px;
}

.next-plan-list {
  margin-top: 16px;
}

.session-confidence-row {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.confidence-label-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.confidence-kicker {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.confidence-track {
  width: 120px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 99px;
  overflow: hidden;
}

.confidence-bar {
  height: 100%;
  width: 0;
  background: var(--secondary);
}

.metric-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.metric-val {
  font-size: 30px;
  letter-spacing: -0.02em;
}

.dashboard-shell {
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
}

@media (max-width: 900px) {
  .app-shell {
    padding-top: 72px;
    padding-bottom: 48px;
  }

  .top-actions {
    top: 12px;
    right: 12px;
    gap: 8px;
  }

  .top-link {
    height: 36px;
    padding: 0 12px;
    font-size: 12px;
  }

  .hero {
    margin-bottom: var(--space-4);
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .score-card {
    padding: 30px 22px;
  }

  .score-summary {
    font-size: 15px;
  }

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

/* V2 refinement overrides (post-review) */
.upload-features .badge {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.subtle-card {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.06);
}

.profile-history-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.profile-session-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.profile-session-main {
  min-width: 0;
}

.profile-session-mode {
  font-size: 20px;
  line-height: 1.15;
}

.profile-session-date {
  font-size: 13px;
  margin-top: 3px;
}

.profile-session-side {
  text-align: right;
}

.profile-session-meta {
  font-size: 12px;
  margin-top: 4px;
}

/* Session V3 visual hierarchy */
.score-card-v3 {
  padding: 56px 44px;
  background:
    radial-gradient(circle at 20% 0%, rgba(208, 255, 0, 0.06), transparent 45%),
    rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.score-hero-copy {
  max-width: 760px;
}

.score-label {
  font-size: 22px;
  letter-spacing: 0.01em;
}

.score-line {
  gap: 16px;
}

.score-value {
  font-size: clamp(110px, 22vw, 178px);
  line-height: 0.82;
}

.score-summary {
  margin-top: 24px;
  font-size: 20px;
  line-height: 1.45;
  color: #c7c8cb;
}

.session-insight {
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-top: 24px;
  max-width: 820px;
}

.session-metrics h3,
.next-plan-card h3,
.breakdown h3 {
  font-size: 28px;
  line-height: 1.05;
}

.session-metric-grid .metric-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 20px;
}

.session-metric-grid .metric-val {
  font-size: 38px;
}

.session-metric-grid .metric-label {
  font-size: 13px;
  letter-spacing: 0.08em;
}

.session-metric-grid .text-muted {
  font-size: 13px;
  line-height: 1.4;
}

.session-breakdown-grid .metric-card {
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.details-toggle-row {
  margin-top: 24px;
  padding-top: 16px;
}

.details-toggle-btn {
  height: 42px;
  border-radius: 999px;
}

@media (max-width: 900px) {
  .score-card-v3 {
    padding: 34px 22px;
  }

  .score-value {
    font-size: clamp(86px, 24vw, 128px);
  }

  .score-summary {
    font-size: 17px;
  }

  .session-insight {
    font-size: 24px;
  }

  .session-metrics h3,
  .next-plan-card h3,
  .breakdown h3 {
    font-size: 22px;
  }

  .session-metric-grid .metric-val {
    font-size: 32px;
  }
}