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

:root {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-text: #000000;
  --color-text-muted: #6b7280;
  --color-primary: #000000;
  --color-accent: #dc2626;
  --color-border: #e5e7eb;
  --color-q-tl: #fef2f2;
  --color-q-tr: #f5f5f5;
  --color-q-bl: #fefce8;
  --color-q-br: #f0fdf4;
  --color-q-tl-accent: #dc2626;
  --color-q-tr-accent: #000000;
  --color-q-bl-accent: #ca8a04;
  --color-q-br-accent: #16a34a;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Hero ===== */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: #000000;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255,255,255,0.05) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 4rem 2rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.35rem);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
  line-height: 1.6;
}

.hero-cta {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: #fff;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 100px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* ===== Sections ===== */
.section {
  padding: 6rem 0;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.section-description {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* ===== Static Matrix Diagram ===== */
.matrix-static {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.matrix-diagram {
  position: relative;
  width: 500px;
  height: 500px;
  max-width: 90vw;
  aspect-ratio: 1;
}

.quadrant-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  width: 100%;
  height: 100%;
  gap: 0;
}

.quadrant {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.q-tl { background: var(--color-q-tl); border-radius: 12px 0 0 0; }
.q-tr { background: var(--color-q-tr); border-radius: 0 12px 0 0; }
.q-bl { background: var(--color-q-bl); border-radius: 0 0 0 12px; }
.q-br { background: var(--color-q-br); border-radius: 0 0 12px 0; }

.quadrant-label {
  font-weight: 800;
  font-size: 0.85rem;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.5;
}

.q-tl .quadrant-label { color: var(--color-q-tl-accent); }
.q-tr .quadrant-label { color: var(--color-q-tr-accent); }
.q-bl .quadrant-label { color: var(--color-q-bl-accent); }
.q-br .quadrant-label { color: var(--color-q-br-accent); }

/* ===== Axis Labels & Lines ===== */
.axis-label {
  position: absolute;
  font-weight: 800;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

.axis-top {
  top: -2rem;
  left: 50%;
  transform: translateX(-50%);
}

.axis-bottom {
  bottom: -2rem;
  left: 50%;
  transform: translateX(-50%);
}

.axis-left {
  left: -7.5rem;
  top: 50%;
  transform: translateY(-50%);
}

.axis-right {
  right: -5rem;
  top: 50%;
  transform: translateY(-50%);
}

.axis-line {
  position: absolute;
  background: var(--color-text);
}

.axis-h {
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  transform: translateY(-1px);
}

.axis-v {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-1px);
}

/* ===== Quadrant Cards ===== */
.quadrant-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 0 auto;
}

.quadrant-card {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  transition: transform 0.2s, box-shadow 0.2s;
}

.quadrant-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.card-position {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.card-profit-purpose .card-position { color: var(--color-q-br-accent); }
.card-purpose-profit .card-position { color: var(--color-q-bl-accent); }
.card-creativity-purpose .card-position { color: var(--color-q-tl-accent); }
.card-creativity-actual .card-position { color: var(--color-q-tr-accent); }

.card-title {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.card-profit-purpose .card-title { color: var(--color-q-br-accent); }
.card-purpose-profit .card-title { color: var(--color-q-bl-accent); }
.card-creativity-purpose .card-title { color: var(--color-q-tl-accent); }
.card-creativity-actual .card-title { color: var(--color-q-tr-accent); }

.card-body {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 0;
}

.card-example {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  font-style: italic;
  margin-bottom: 1rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-border);
}

.card-brands {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.brand-tag {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  background: var(--color-bg);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

/* ===== Brands Matrix ===== */
.section-brands-matrix {
  background: #ffffff;
}

.brands-matrix-wrapper {
  display: flex;
  justify-content: center;
}

.brands-matrix {
  position: relative;
  width: 700px;
  height: 700px;
  max-width: 90vw;
  max-height: 90vw;
  margin: 0 auto;
}

.quadrant-bg {
  position: absolute;
  width: 50%;
  height: 50%;
}

.q-tl-bg { top: 0; left: 0; background: var(--color-q-tl); border-radius: 12px 0 0 0; }
.q-tr-bg { top: 0; right: 0; background: var(--color-q-tr); border-radius: 0 12px 0 0; }
.q-bl-bg { bottom: 0; left: 0; background: var(--color-q-bl); border-radius: 0 0 0 12px; }
.q-br-bg { bottom: 0; right: 0; background: var(--color-q-br); border-radius: 0 0 12px 0; }

/* Brand dots on the matrix */
.brand-dot {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  cursor: default;
  z-index: 2;
  transition: transform 0.15s;
}

.brand-dot:hover {
  transform: translate(-50%, -50%) scale(1.15);
  z-index: 10;
}

.brand-dot-circle {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.65rem;
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  text-align: center;
  line-height: 1.1;
  padding: 2px;
}

.brand-dot-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  background: rgba(255,255,255,0.9);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

/* ===== Interactive Section ===== */
.section-interactive {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.interactive-controls {
  max-width: 600px;
  margin: 0 auto 2rem;
  text-align: center;
}

.input-group {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.input-group input[type="text"] {
  flex: 1;
  min-width: 200px;
  padding: 0.85rem 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 500;
  outline: none;
  transition: border-color 0.2s;
}

.input-group input[type="text"]:focus {
  border-color: var(--color-primary);
}

.input-group input[type="color"] {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: 4px;
  cursor: pointer;
  background: var(--color-surface);
}

.input-group button,
.btn-secondary {
  padding: 0.85rem 1.75rem;
  border: none;
  border-radius: 12px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.input-group button {
  background: var(--color-primary);
  color: #fff;
}

.input-group button:hover:not(:disabled) {
  background: #333333;
  transform: translateY(-1px);
}

.input-group button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-text-muted);
}

.controls-hint {
  margin-top: 0.75rem;
  min-height: 1.5rem;
}

.controls-hint span {
  font-size: 0.9rem;
  color: var(--color-primary);
  font-weight: 600;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hidden {
  display: none !important;
}

.action-buttons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1rem;
}

/* Interactive Matrix */
.interactive-matrix-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.interactive-matrix {
  position: relative;
  width: 700px;
  height: 700px;
  max-width: 90vw;
  max-height: 90vw;
  margin: 0 auto;
  cursor: crosshair;
  user-select: none;
}

.interactive-matrix.placing {
  cursor: crosshair;
}

.quadrant-label-overlay {
  position: absolute;
  font-weight: 800;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.5;
  text-align: center;
  opacity: 0.3;
  pointer-events: none;
  z-index: 1;
}

.q-tl-label { top: 35%; left: 25%; transform: translate(-50%, -50%); color: var(--color-q-tl-accent); }
.q-tr-label { top: 35%; left: 75%; transform: translate(-50%, -50%); color: var(--color-q-tr-accent); }
.q-bl-label { top: 65%; left: 25%; transform: translate(-50%, -50%); color: var(--color-q-bl-accent); }
.q-br-label { top: 65%; left: 75%; transform: translate(-50%, -50%); color: var(--color-q-br-accent); }

/* User-placed brand on interactive matrix */
.user-brand {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  cursor: grab;
  z-index: 5;
  transition: box-shadow 0.15s;
}

.user-brand:active {
  cursor: grabbing;
}

.user-brand-dot {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  text-transform: uppercase;
}

.user-brand-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  background: rgba(255,255,255,0.95);
  padding: 0.15rem 0.6rem;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-brand-remove {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #ef4444;
  color: #fff;
  border: 2px solid #fff;
  font-size: 0.6rem;
  font-weight: 800;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 6;
}

.user-brand:hover .user-brand-remove {
  display: flex;
}

/* Quadrant Readout */
.quadrant-readout {
  margin-top: 1rem;
  text-align: center;
  min-height: 2rem;
}

.quadrant-readout span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .section {
    padding: 4rem 0;
  }

  .matrix-diagram {
    width: 320px;
    height: 320px;
  }

  .quadrant-label {
    font-size: 0.7rem;
  }

  .brands-matrix,
  .interactive-matrix {
    width: 100%;
    height: 0;
    padding-bottom: 100%;
  }

  .brand-dot-circle {
    width: 32px;
    height: 32px;
    font-size: 0.5rem;
  }

  .brand-dot-label {
    font-size: 0.55rem;
  }

  .quadrant-cards {
    grid-template-columns: 1fr 1fr;
  }

  .input-group {
    flex-direction: column;
  }

  .input-group input[type="text"] {
    width: 100%;
  }

  .action-buttons {
    flex-direction: column;
    align-items: center;
  }

  .axis-label {
    font-size: 0.6rem;
  }
}