frontend/src/index.css

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Syne:wght@600;700;800&display=swap');

@tailwind base;
@tailwind components;
@tailwind utilities;

/* ── Skip Navigation Link (Accessibility) ───────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: #10b981;
  color: #000;
  font-weight: 600;
  border-radius: 0 0 0.5rem 0.5rem;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}

@layer base {
  :root {
    --color-bg: #040815;
    --color-surface: #0b1123;
    --color-surface-2: #141c33;
    --color-surface-3: #1e284a;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-strong: rgba(255, 255, 255, 0.14);
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-faint: #475569;
    --color-accent: #10b981;
    --color-accent-dim: rgba(16, 185, 129, 0.1);
    /* score colors */
    --color-good: #10b981;
    --color-warn: #f59e0b;
    --color-danger: #ef4444;
  }

  * {
    border-color: var(--color-border);
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    font-size: 16px;
  }

  body {
    font-family:
      'Inter',
      system-ui,
      -apple-system,
      sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
  }

  h1,
  h2,
  h3 {
    font-family: 'Syne', 'Inter', sans-serif;
    letter-spacing: -0.03em;
    line-height: 1.1;
  }

  ::-webkit-scrollbar {
    width: 4px;
    height: 4px;
  }
  ::-webkit-scrollbar-track {
    background: #000;
  }
  ::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 2px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: #555;
  }

  input[type='number']::-webkit-outer-spin-button,
  input[type='number']::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
  }
  input[type='number'] {
    -moz-appearance: textfield;
  }
}

@layer components {
  /* ── Cards ── */
  .glass-card {
    background: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 1rem;
  }

  .glass-card-hover {
    @apply glass-card transition-all duration-300 cursor-pointer;
  }

  .glass-card-hover:hover {
    background: var(--color-surface-2);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  }

  /* ── Typography ── */
  .gradient-text {
    background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .gradient-text-warm {
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  /* ── Glow ── */
  .glow-eco {
    box-shadow:
      0 0 30px rgba(255, 255, 255, 0.1),
      0 0 60px rgba(255, 255, 255, 0.04);
  }

  .glow-blue {
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.08);
  }

  /* ── Buttons ── */
  .btn-primary {
    @apply relative overflow-hidden inline-flex items-center justify-center gap-2;
    @apply px-6 py-3 rounded-xl font-semibold transition-all duration-200;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    font-size: 0.9375rem;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.25);
  }

  .btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), transparent);
    opacity: 0;
    transition: opacity 0.2s;
    border-radius: inherit;
  }

  .btn-primary:hover::after {
    opacity: 1;
  }
  .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.45);
  }
  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-secondary {
    @apply inline-flex items-center justify-center gap-2 px-6 py-3 rounded-xl font-semibold transition-all duration-200;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    font-size: 0.9375rem;
  }

  .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.35);
  }

  /* ── Form inputs ── */
  .input-field {
    @apply w-full rounded-xl px-4 py-3 transition-all duration-200 focus:outline-none;
    background: var(--color-surface-2);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 0.9375rem;
  }

  .input-field:hover {
    border-color: rgba(255, 255, 255, 0.15);
  }

  .input-field:focus {
    background: var(--color-surface-3);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
  }

  .input-field::placeholder {
    color: rgba(255, 255, 255, 0.2);
  }

  .select-field {
    @apply input-field cursor-pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 42px;
  }

  .select-field option {
    background: #111;
    color: #fff;
  }

  .form-label {
    @apply block text-sm font-medium mb-2;
    color: #888;
    letter-spacing: 0.01em;
  }

  /* ── Badges ── */
  .eco-badge {
    @apply inline-flex items-center gap-1.5 px-3 py-1 rounded-full text-xs font-semibold;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }

  .badge-high {
    @apply inline-flex items-center gap-1 px-2.5 py-0.5 rounded-full text-xs font-semibold;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
  }

  .badge-medium {
    @apply inline-flex items-center gap-1 px-2.5 py-0.5 rounded-full text-xs font-semibold;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #bbbbbb;
  }

  .badge-low {
    @apply inline-flex items-center gap-1 px-2.5 py-0.5 rounded-full text-xs font-semibold;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #777777;
  }

  /* ── Stat ── */
  .stat-number {
    @apply text-3xl font-bold;
    font-family: 'Syne', sans-serif;
    color: #ffffff;
  }

  /* ── Skeleton ── */
  .skeleton {
    background: linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.03) 25%,
      rgba(255, 255, 255, 0.07) 50%,
      rgba(255, 255, 255, 0.03) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.8s ease-in-out infinite;
    border-radius: 0.5rem;
  }

  /* ── Divider ── */
  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    margin: 1.75rem 0;
  }

  /* ── Progress ── */
  .progress-bar {
    @apply h-1.5 rounded-full overflow-hidden;
    background: rgba(255, 255, 255, 0.06);
  }

  .progress-bar-fill {
    @apply h-full rounded-full transition-all duration-700 ease-out;
    background: #ffffff;
  }

  /* ── Step indicator ── */
  .step-active {
    background: #ffffff;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.25);
  }

  .step-complete {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
  }

  .step-inactive {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  /* ── Nav ── */
  .nav-link-active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
  }

  .nav-link {
    color: #666666;
    background: transparent;
    border: 1px solid transparent;
    transition: all 0.2s;
  }

  .nav-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.04);
  }

  /* ── Animated underline ── */
  .animated-underline {
    position: relative;
  }

  .animated-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #ffffff;
    transition: width 0.3s ease;
  }

  .animated-underline:hover::after {
    width: 100%;
  }

  /* ── Ticker / animated number ── */
  .ticker {
    font-family: 'Syne', monospace;
    font-variant-numeric: tabular-nums;
    transition: all 0.6s ease;
  }

  /* ── Dynamic scan line ── */
  .scan-line {
    position: relative;
    overflow: hidden;
  }

  .scan-line::before {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(
      180deg,
      transparent 0%,
      rgba(255, 255, 255, 0.03) 50%,
      transparent 100%
    );
    animation: scan 4s ease-in-out infinite;
  }

  @keyframes scan {
    0% {
      top: -100%;
    }
    100% {
      top: 200%;
    }
  }

  /* ── Blinking cursor ── */
  .cursor-blink::after {
    content: '|';
    animation: blink 1s step-end infinite;
    color: #ffffff;
    margin-left: 2px;
  }

  @keyframes blink {
    0%,
    100% {
      opacity: 1;
    }
    50% {
      opacity: 0;
    }
  }

  /* ── Animated border ── */
  .animated-border {
    position: relative;
  }

  .animated-border::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.3),
      transparent,
      rgba(255, 255, 255, 0.1)
    );
    background-size: 200% 200%;
    animation: borderRotate 4s linear infinite;
    -webkit-mask:
      linear-gradient(#fff 0 0) content-box,
      linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s;
  }

  .animated-border:hover::before {
    opacity: 1;
  }
}

/* ── Keyframes ── */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes borderRotate {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-right {
  from {
    opacity: 0;
    transform: translateX(-12px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse-slow {
  0%,
  100% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.6;
  }
}

@keyframes count-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes expand-width {
  from {
    width: 0;
  }
  to {
    width: var(--target-width, 100%);
  }
}

.animate-fade-in {
  animation: fade-in 0.4s ease-out forwards;
}
.animate-slide-up {
  animation: slide-up 0.45s ease-out forwards;
}
.animate-slide-right {
  animation: slide-right 0.4s ease-out forwards;
}
.animate-float {
  animation: float 5s ease-in-out infinite;
}
.animate-pulse-slow {
  animation: pulse-slow 3s ease-in-out infinite;
}
.animate-spin {
  animation: spin 0.8s linear infinite;
}
.animate-count {
  animation: count-up 0.5s ease-out forwards;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ── Recharts overrides ── */
.recharts-tooltip-wrapper .recharts-default-tooltip {
  background: #111111 !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: 12px !important;
}

.recharts-default-tooltip .recharts-tooltip-label {
  color: #888 !important;
  font-size: 12px !important;
}

/* ── Focus rings ── */
*:focus-visible {
  outline: 1px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ── Range input ── */
input[type='range'] {
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
  transition: box-shadow 0.2s;
}

input[type='range']::-webkit-slider-thumb:hover {
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.5);
}

/* ── Dynamic grid bg ── */
.grid-bg {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}

/* ── Progress fill (moved from inline dangerouslySetInnerHTML) ── */
@keyframes progressFill {
  from {
    width: 0%;
  }
  to {
    width: 98%;
  }
}

/* ── Accessibility: prefers-reduced-motion ── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    background-attachment: initial !important;
    scroll-behavior: auto !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
}