:root {
  --accent: #ff7a00;
  --accent-soft: #ffe1c2;
  --gray: #777777;
  --black: #111111;
  --white: #ffffff;

  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-soft: 0 14px 30px rgba(0, 0, 0, 0.07);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  background-color: var(--white);
  color: var(--black);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Top bar */

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.25rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.logo-wrap {
  display: flex;
  align-items: center;
}

.logo {
  height: 40px;
  width: auto;
}

/* Buttons */

.btn {
  border: none;
  border-radius: 999px;
  padding: 0.45rem 1.1rem;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  background-color: var(--accent);
  color: var(--white);
  transition: transform 0.08s ease, box-shadow 0.08s ease,
    background-color 0.08s ease, opacity 0.08s ease;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 9px 18px rgba(0, 0, 0, 0.1);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.btn:disabled {
  opacity: 0.55;
  cursor: default;
  box-shadow: none;
  transform: none;
}

/* Variants */

.btn-ghost {
  background-color: transparent;
  color: var(--black);
  box-shadow: none;
  border-radius: 999px;
  padding-inline: 0.75rem;
}

.btn-ghost:hover {
  background-color: rgba(0, 0, 0, 0.03);
  box-shadow: none;
}

.btn-secondary {
  background-color: var(--black);
}

.btn-secondary:hover {
  background-color: #000000;
}

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

.btn-primary:hover {
  background-color: #ff8c22;
}

.btn-small {
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  box-shadow: none;
}

.btn-full {
  width: 100%;
}

/* Layout */

.layout {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.panel-board {
  flex: 1;
}

.panel-controls {
  flex: 1;
}

/* Cards */

.card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 1.1rem 1.1rem 1.2rem;
}

.card-stats {
  margin-top: 0.75rem;
}

/* Board */

.board-wrapper {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 0.8rem;
}

.board {
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
}

/* Meta */

.meta {
  margin-top: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.meta-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--gray);
}

.fen-block {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.fen-row {
  display: flex;
  gap: 0.45rem;
  align-items: center;
}

.fen-input {
  flex: 1;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  color: var(--black);
  background-color: #fafafa;
}

.links-block {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.link {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
}

.link:hover {
  text-decoration: underline;
}

/* Controls panel / training card */

.title {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0 0 0.9rem;
  font-size: 0.9rem;
  color: var(--gray);
}

.question {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.badge {
  border-radius: 999px;
  padding: 0.1rem 0.7rem;
  font-size: 0.8rem;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.buttons-row {
  display: flex;
  gap: 0.55rem;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
}

.buttons-row .btn {
  flex: 1;
}

.feedback {
  min-height: 1.2em;
  font-size: 0.9rem;
  margin: 0 0 0.7rem;
}

/* Feedback colors (w naszej palecie) */

.feedback--correct {
  color: var(--accent);
}

.feedback--wrong {
  color: var(--gray);
}

/* Solution */

.solution-block {
  margin-top: 0.3rem;
}

.solution {
  margin-top: 0.75rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-md);
  background-color: #f9f9f9;
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.solution-title {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.solution-list {
  margin: 0 0 0.6rem;
  padding-left: 1.2rem;
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.88rem;
}

.solve-lichess-btn {
  margin-top: 0.25rem;
}

.nav-row {
  margin-top: 0.9rem;
}

.hidden {
  display: none;
}

/* Stats */

.stats-title {
  margin: 0 0 0.65rem;
  font-size: 0.98rem;
}

.stats-row {
  display: flex;
  gap: 1.4rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 600;
}

/* Modal */

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 40;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.28);
}

.modal-content {
  position: relative;
  max-width: 520px;
  width: 90%;
  background-color: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 1.1rem 1.2rem 1.2rem;
  z-index: 41;
}

.modal-title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.modal-content p {
  font-size: 0.9rem;
  color: var(--black);
}

.modal-close {
  position: absolute;
  top: 0.45rem;
  right: 0.6rem;
  border: none;
  background: transparent;
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.1rem 0.3rem;
}

/* Responsive */

@media (min-width: 768px) {
  .layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .panel-board {
    flex: 0 0 50%;
  }

  .panel-controls {
    flex: 0 0 50%;
  }

  .board {
    max-width: 500px;
  }
}

@media (min-width: 1024px) {
  .panel-board {
    flex: 0 0 48%;
  }

  .panel-controls {
    flex: 0 0 52%;
  }
}