/* ============================================================
   Planer specjalizacji Merito — design system
   ============================================================ */

:root {
  /* Merito brand */
  --merito-blue: #0057ff;
  --merito-blue-600: #0047d4;
  --merito-blue-50: #eef3ff;
  --merito-navy: #0a1635;
  --merito-navy-80: rgba(10, 22, 53, 0.8);

  /* Neutral canvas */
  --bg: #fbfbfd;
  --surface: #ffffff;
  --border: #e4e7ee;
  --border-strong: #c9cfdb;
  --text: #0a1635;
  --text-muted: #5b6478;
  --text-subtle: #8a92a3;

  /* Feedback */
  --success: #0e9f6e;
  --success-50: #e7f8f1;
  --warning: #d97706;
  --warning-50: #fef3e7;
  --danger: #dc2626;

  /* Specialization accents */
  --spec-gm: #ec4899;
  --spec-wsi: #f59e0b;
  --spec-p: #10b981;
  --spec-ec: #06b6d4;
  --spec-bsi: #7c3aed;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(10, 22, 53, 0.04);
  --shadow-md: 0 2px 8px rgba(10, 22, 53, 0.06);
  --shadow-lg: 0 12px 32px rgba(10, 22, 53, 0.12);
  --shadow-xl: 0 24px 60px rgba(10, 22, 53, 0.22);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* ============================================================
   Reset & base
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    system-ui,
    sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  font-feature-settings: "cv11", "ss01";
}

h1,
h2,
h3,
h4 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: var(--merito-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--merito-blue);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection {
  background: var(--merito-blue-50);
  color: var(--merito-navy);
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
  background: var(--merito-navy);
  color: #fff;
  padding: 18px 32px;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand__mark {
  width: 40px;
  height: 40px;
  background: var(--merito-blue);
  border-radius: 4px;
  display: grid;
  place-items: center;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 22px;
  color: #fff;
  letter-spacing: -0.04em;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 2px 8px rgba(0, 87, 255, 0.4);
}

.brand__title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand__subtitle {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 2px;
}

.site-header__meta {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.site-header__meta strong {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 10px;
  margin-bottom: 2px;
}

/* ============================================================
   Layout grid
   ============================================================ */

.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 32px 120px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 40px;
  align-items: start;
}

.main__column {
  min-width: 0;
}

/* ============================================================
   Page intro
   ============================================================ */

.intro {
  margin-bottom: 40px;
}

.intro__eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--merito-blue);
  background: var(--merito-blue-50);
  padding: 6px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.intro__title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--merito-navy);
  margin-bottom: 12px;
}

.intro__title em {
  font-style: normal;
  color: var(--merito-blue);
}

.intro__lead {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 62ch;
}

/* ============================================================
   Semester section (accordion)
   ============================================================ */

.semester {
  margin-bottom: 32px;
  border-left: 2px solid var(--border);
  padding-left: 24px;
  transition: border-color 200ms var(--ease-out);
}

.semester[open] {
  border-left-color: var(--merito-blue);
}

.semester__summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 0;
  display: flex;
  align-items: baseline;
  gap: 16px;
  user-select: none;
}

.semester__summary::-webkit-details-marker {
  display: none;
}

.semester__roman {
  font-family: "Space Grotesk", sans-serif;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--merito-blue);
  line-height: 1;
  min-width: 48px;
}

.semester__heading {
  flex: 1;
  min-width: 0;
}

.semester__title {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--merito-navy);
}

.semester__meta {
  font-size: 12px;
  color: var(--text-subtle);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 4px;
  font-weight: 500;
}

.semester__chevron {
  width: 20px;
  height: 20px;
  color: var(--text-subtle);
  transition: transform 250ms var(--ease-out);
  flex-shrink: 0;
  align-self: center;
}

.semester[open] .semester__chevron {
  transform: rotate(90deg);
}

.semester__content {
  padding-top: 8px;
  padding-bottom: 16px;
}

/* ============================================================
   Koszyk (basket)
   ============================================================ */

.koszyk {
  margin-top: 20px;
}

.koszyk__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.koszyk__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.005em;
}

.koszyk__count {
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--text-subtle);
  padding: 2px 10px;
  border-radius: 100px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-weight: 500;
  transition: all 200ms var(--ease-out);
}

.koszyk__count[data-filled="true"] {
  background: var(--merito-blue-50);
  color: var(--merito-blue-600);
  border-color: var(--merito-blue-50);
}

.koszyk__items {
  display: grid;
  gap: 8px;
}

/* ============================================================
   Course card (radio)
   ============================================================ */

.course {
  position: relative;
  display: block;
  cursor: pointer;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px 14px 48px;
  transition:
    transform 200ms var(--ease-out),
    border-color 200ms var(--ease-out),
    background-color 200ms var(--ease-out),
    box-shadow 200ms var(--ease-out);
}

.course__input {
  position: absolute;
  left: 16px;
  top: 17px;
  width: 20px;
  height: 20px;
  appearance: none;
  -webkit-appearance: none;
  border: 2px solid var(--border-strong);
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  transition: all 200ms var(--ease-out);
  margin: 0;
}

.course__input:checked {
  border-color: var(--merito-blue);
  background: var(--merito-blue);
  box-shadow: inset 0 0 0 3px #fff;
}

.course:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.course:has(.course__input:checked) {
  background: var(--merito-blue-50);
  border-color: var(--merito-blue);
  border-width: 2px;
  padding: 13px 15px 13px 47px;
}

.course:has(.course__input:checked) .course__name {
  color: var(--merito-navy);
  font-weight: 600;
}

.course__row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.course__name {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.005em;
  line-height: 1.35;
  flex: 1;
  min-width: 0;
}

.course__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  flex-shrink: 0;
  justify-content: flex-end;
  max-width: 60%;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 3px 8px;
  border-radius: 100px;
  font-variant-numeric: tabular-nums;
}

.chip--gm {
  background: color-mix(in srgb, var(--spec-gm) 15%, white);
  color: color-mix(in srgb, var(--spec-gm) 70%, black);
}
.chip--wsi {
  background: color-mix(in srgb, var(--spec-wsi) 18%, white);
  color: color-mix(in srgb, var(--spec-wsi) 80%, black);
}
.chip--p {
  background: color-mix(in srgb, var(--spec-p) 15%, white);
  color: color-mix(in srgb, var(--spec-p) 70%, black);
}
.chip--ec {
  background: color-mix(in srgb, var(--spec-ec) 15%, white);
  color: color-mix(in srgb, var(--spec-ec) 70%, black);
}
.chip--bsi {
  background: color-mix(in srgb, var(--spec-bsi) 15%, white);
  color: color-mix(in srgb, var(--spec-bsi) 70%, black);
}

.course__meta {
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-subtle);
  font-weight: 500;
}

.course__meta span + span::before {
  content: "·";
  margin-right: 10px;
  color: var(--border-strong);
}

.course__once {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: var(--warning);
  font-weight: 600;
}

.course__once svg {
  width: 11px;
  height: 11px;
}

/* ============================================================
   Sticky summary panel
   ============================================================ */

.summary {
  position: sticky;
  top: 100px;
  background: var(--merito-navy);
  color: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.summary::-webkit-scrollbar {
  width: 6px;
}

.summary::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

.summary__title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 20px;
}

.summary__specs {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}

.spec {
  position: relative;
  transition: all 300ms var(--ease-out);
}

.spec--achieved {
  padding: 14px;
  margin: -14px;
  border-radius: 10px;
  background: rgba(14, 159, 110, 0.1);
  border: 1px solid rgba(14, 159, 110, 0.3);
}

.spec__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.spec__label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: #fff;
}

.spec__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.spec--gm .spec__dot {
  background: var(--spec-gm);
}
.spec--wsi .spec__dot {
  background: var(--spec-wsi);
}
.spec--p .spec__dot {
  background: var(--spec-p);
}
.spec--ec .spec__dot {
  background: var(--spec-ec);
}
.spec--bsi .spec__dot {
  background: var(--spec-bsi);
}

.spec__check {
  width: 14px;
  height: 14px;
  color: var(--success);
  opacity: 0;
  transform: scale(0.5);
  transition: all 300ms var(--ease-out);
}

.spec--achieved .spec__check {
  opacity: 1;
  transform: scale(1);
}

.spec__value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: #fff;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.spec__value-total {
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.4);
}

.spec__bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 100px;
  overflow: hidden;
  position: relative;
}

.spec__bar-fill {
  height: 100%;
  border-radius: 100px;
  transition: width 450ms var(--ease-out);
  width: 0;
}

.spec--gm .spec__bar-fill {
  background: var(--spec-gm);
}
.spec--wsi .spec__bar-fill {
  background: var(--spec-wsi);
}
.spec--p .spec__bar-fill {
  background: var(--spec-p);
}
.spec--ec .spec__bar-fill {
  background: var(--spec-ec);
}
.spec--bsi .spec__bar-fill {
  background: var(--spec-bsi);
}

.spec--achieved .spec__bar-fill {
  box-shadow: 0 0 12px currentColor;
}

/* ============================================================
   Warnings
   ============================================================ */

.warnings {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  margin-bottom: 20px;
}

.warnings__title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 12px;
}

.warnings__list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.warnings__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12px;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.75);
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 2px solid transparent;
}

.warnings__item--info {
  border-left-color: rgba(255, 255, 255, 0.2);
}

.warnings__item--warning {
  border-left-color: var(--warning);
  background: rgba(217, 119, 6, 0.1);
  color: rgba(254, 243, 199, 0.95);
}

.warnings__item--success {
  border-left-color: var(--success);
  background: rgba(14, 159, 110, 0.12);
  color: rgba(209, 250, 229, 0.95);
}

.warnings__item svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  margin-top: 1px;
}

.warnings__empty {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  font-style: italic;
}

/* ============================================================
   Summary actions
   ============================================================ */

.summary__actions {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: all 200ms var(--ease-out);
  cursor: pointer;
  font-family: inherit;
}

.btn--ghost {
  background: transparent;
  color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.btn--link {
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  padding: 10px 4px;
  border: none;
  text-decoration: none;
}

.btn--link:hover {
  color: #fff;
  text-decoration: underline;
}

.btn--primary {
  background: var(--merito-blue);
  color: #fff;
}

.btn--primary:hover {
  background: var(--merito-blue-600);
}

.btn--danger {
  background: var(--danger);
  color: #fff;
}

.btn--danger:hover {
  background: #b91c1c;
}

/* ============================================================
   Modal
   ============================================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 22, 53, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 100;
  animation: fadeIn 200ms var(--ease-out);
}

.modal-backdrop[data-open="true"] {
  display: flex;
}

.modal {
  background: var(--surface);
  border-radius: 16px;
  padding: 32px;
  max-width: 440px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  animation: modalIn 250ms var(--ease-out);
}

.modal__title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--merito-navy);
  margin-bottom: 8px;
}

.modal__text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 24px;
}

.modal__actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.modal .btn--ghost {
  color: var(--text-muted);
  border-color: var(--border);
}

.modal .btn--ghost:hover {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border-strong);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1100px) {
  .main {
    grid-template-columns: 1fr;
    padding: 32px 24px 180px;
    gap: 32px;
  }

  .summary {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 20px 20px 0 0;
    padding: 20px 20px 24px;
    max-height: 80vh;
    box-shadow: 0 -12px 40px rgba(10, 22, 53, 0.25);
    top: auto;
    z-index: 40;
    transform: translateY(calc(100% - 92px));
    transition: transform 350ms var(--ease-out);
  }

  .summary[data-open="true"] {
    transform: translateY(0);
  }

  .summary__handle {
    display: block;
    width: 44px;
    height: 4px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 4px;
    margin: 0 auto 12px;
    cursor: pointer;
  }

  .summary__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    padding: 0;
    margin-bottom: 16px;
    cursor: pointer;
    color: #fff;
  }

  .summary__toggle-title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: -0.005em;
  }

  .summary__toggle-stats {
    display: flex;
    gap: 6px;
    font-size: 11px;
    font-variant-numeric: tabular-nums;
    color: rgba(255, 255, 255, 0.6);
  }
}

@media (min-width: 1101px) {
  .summary__handle,
  .summary__toggle {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 14px 20px;
  }

  .site-header__meta {
    display: none;
  }

  .main {
    padding: 24px 16px 180px;
  }

  .intro__title {
    font-size: 30px;
  }

  .course {
    padding: 12px 14px 12px 44px;
  }

  .course__input {
    left: 14px;
    top: 15px;
  }

  .course__chips {
    max-width: 100%;
    margin-top: 6px;
  }

  .course__row {
    flex-direction: column;
    gap: 4px;
  }
}

/* ============================================================
   Reduced motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}