:root {
  --lavender: #9f83d7;
  --lavender-light: #cbb8ef;
  --lavender-deep: #6f51ad;
  --ink: #0b0910;
  --panel: rgba(12, 10, 18, 0.86);
  --panel-soft: rgba(24, 19, 34, 0.72);
  --text: #f7f4fb;
  --muted: #c3b8d2;
  --line: rgba(255, 255, 255, 0.12);
  --success: #b9ffa9;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Ubuntu, "Segoe UI", Arial, sans-serif;
  background:
    linear-gradient(rgba(14, 10, 20, .16), rgba(14, 10, 20, .22)),
    url("../assets/background.png") center center / cover fixed no-repeat,
    var(--lavender);
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.page-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 8, 15, .48) 0%, rgba(10, 8, 15, .18) 45%, rgba(10, 8, 15, .25) 100%),
    linear-gradient(180deg, rgba(7, 5, 12, .12), rgba(7, 5, 12, .38));
  pointer-events: none;
}

.site-header,
.site-main,
.site-footer {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.site-header {
  min-height: 72px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.site-header a {
  color: inherit;
  text-decoration: none;
}

.back-link {
  width: max-content;
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: .9;
}

.back-link:hover {
  opacity: 1;
}

.header-title {
  text-align: center;
}

.header-status {
  justify-self: end;
  color: var(--success);
}

.site-main {
  padding: 110px 0 90px;
}

.hero {
  width: min(760px, 100%);
  margin-bottom: 90px;
}

.eyebrow,
.section-heading,
.mini-label {
  font-family: "Courier New", monospace;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .16em;
}

.eyebrow {
  color: var(--lavender-light);
}

.hero h1 {
  margin: 14px 0 18px;
  font-size: clamp(3rem, 8vw, 6.4rem);
  line-height: .88;
  letter-spacing: -.055em;
  font-weight: 900;
}

.hero h1 span {
  color: var(--lavender-light);
}

.hero p {
  max-width: 670px;
  margin: 0;
  color: #eee8f4;
  font-size: 1rem;
  line-height: 1.8;
  text-shadow: 0 2px 20px rgba(0, 0, 0, .45);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  color: #ede7f5;
}

.challenge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 18px;
}

.challenge-card {
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 22px 70px rgba(0, 0, 0, .22);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition:
    transform .2s ease,
    border-color .2s ease,
    background .2s ease;
}

.challenge-card:hover {
  transform: translateY(-2px);
  border-color: rgba(203, 184, 239, .32);
}

.challenge-card.is-open {
  background: rgba(11, 9, 16, .93);
  border-color: rgba(203, 184, 239, .28);
}

.challenge-card.is-locked {
  opacity: .6;
}

.challenge-summary {
  width: 100%;
  min-height: 145px;
  padding: 25px 28px;
  display: grid;
  grid-template-columns: 115px 1fr auto;
  gap: 28px;
  align-items: center;
  text-align: left;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.challenge-day-block {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  border-right: 1px solid var(--line);
}

.challenge-day {
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--lavender-light);
}

.challenge-tag {
  width: max-content;
  padding: 6px 8px;
  color: #17101f;
  background: var(--lavender-light);
  border-radius: 6px;
  font-family: "Courier New", monospace;
  font-size: .65rem;
  font-weight: 900;
  letter-spacing: .08em;
}

.challenge-copy h2 {
  margin: 0 0 9px;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

.challenge-copy p {
  margin: 0;
  max-width: 670px;
  color: var(--muted);
  line-height: 1.6;
  font-size: .88rem;
}

.challenge-action {
  min-width: 88px;
  color: #ddd2eb;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .11em;
}

.challenge-action b {
  margin-left: 7px;
  color: var(--lavender-light);
  font-size: 1rem;
}

.challenge-content {
  border-top: 1px solid var(--line);
}

.challenge-inner {
  padding: 28px;
}

.challenge-objective {
  margin-bottom: 26px;
}

.challenge-objective p {
  margin: 9px 0 0;
  color: #ded6e8;
  line-height: 1.65;
}

.mini-label {
  color: var(--lavender-light);
}

.lab {
  padding: 22px;
  background: rgba(2, 2, 4, .46);
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 12px;
}

.lab-form label {
  display: block;
}

.input-row {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr auto;
}

.lab-input {
  min-width: 0;
  padding: 15px 16px;
  color: #fff;
  background: rgba(0, 0, 0, .4);
  border: 1px solid #423753;
  border-right: 0;
  border-radius: 8px 0 0 8px;
  outline: none;
  font-family: "Courier New", monospace;
}

.lab-input:focus {
  border-color: var(--lavender-light);
}

.lab-form button {
  padding: 0 20px;
  border: 0;
  border-radius: 0 8px 8px 0;
  color: #17101f;
  background: var(--lavender-light);
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .08em;
  cursor: pointer;
}

.lab-output {
  margin-top: 20px;
}

.output-content {
  min-height: 62px;
  margin-top: 10px;
  padding: 14px;
  overflow-wrap: anywhere;
  color: #e8e1ef;
  background: #09070d;
  border-left: 3px solid var(--lavender-deep);
  font-family: "Courier New", monospace;
  line-height: 1.6;
}

.challenge-hint {
  margin-top: 18px;
}

.hint-button {
  padding: 0;
  color: #cfc2de;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, .25);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .1em;
  cursor: pointer;
}

.hint-text {
  max-width: 700px;
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: .82rem;
}

.site-footer {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid rgba(255,255,255,.14);
  color: rgba(255, 255, 255, .62);
  font-size: .62rem;
  letter-spacing: .12em;
}

@media (max-width: 760px) {
  body {
    background-attachment: scroll;
    background-position: center top;
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .header-title {
    display: none;
  }

  .challenge-summary {
    grid-template-columns: 78px 1fr;
    gap: 18px;
    padding: 22px 18px;
  }

  .challenge-action {
    grid-column: 2;
  }

  .challenge-day-block {
    grid-row: 1 / span 2;
  }

  .site-main {
    padding-top: 78px;
  }

  .hero {
    margin-bottom: 65px;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

  .lab-input {
    border-right: 1px solid #423753;
    border-radius: 8px 8px 0 0;
  }

  .lab-form button {
    min-height: 48px;
    border-radius: 0 0 8px 8px;
  }

  .site-footer {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: clamp(2.8rem, 17vw, 4.5rem);
  }

  .challenge-summary {
    grid-template-columns: 1fr;
  }

  .challenge-day-block {
    grid-row: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-bottom: 16px;
  }

  .challenge-action {
    grid-column: auto;
  }

  .challenge-inner {
    padding: 20px 16px;
  }
}

.challenge-card.is-completed {
  border-color: rgba(185, 255, 169, 0.45);
}

.challenge-card.is-completed .challenge-tag {
  background: #b9ffa9;
  color: #111;
}

.challenge-card.is-completed .challenge-action {
  color: #b9ffa9;
}

.challenge-completed {
  display: flex;
  flex-direction: column;
  gap: 8px;

  padding: 18px;

  border: 1px solid rgba(185, 255, 169, 0.35);
  border-radius: 8px;

  background: rgba(185, 255, 169, 0.06);
}

.challenge-completed strong {
  color: #b9ffa9;
  letter-spacing: 0.1em;
}

.challenge-completed span {
  color: #c3b8d2;
  font-size: 0.8rem;
}

/* ========================================
   DAY 02 — SQL INJECTION
======================================== */

.sql-query {
  margin-bottom: 18px;
}

.sql-query pre {
  margin: 10px 0 0;
  padding: 16px;

  overflow-x: auto;

  background: rgba(0, 0, 0, 0.35);

  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
}

.sql-query code {
  color: #cbb8ef;
  font-family: "Courier New", monospace;
  line-height: 1.6;
}

.sql-analysis {
  margin-top: 15px;
  padding: 15px;

  background: rgba(0, 0, 0, 0.25);

  border-left: 3px solid #9f83d7;
}

.sql-analysis p {
  display: flex;
  justify-content: space-between;

  margin: 8px 0;

  color: #c3b8d2;

  font-family: "Courier New", monospace;
  font-size: 0.75rem;
}

.sql-analysis strong {
  color: #b9ffa9;
}

.access-denied {
  margin-top: 16px;
  padding: 15px;

  color: #ff9b9b;

  border: 1px solid rgba(255, 100, 100, 0.25);
  border-radius: 8px;

  background: rgba(255, 80, 80, 0.05);

  font-family: "Courier New", monospace;
  font-weight: bold;

  letter-spacing: 0.1em;
}


/* SQL SYNTAX HIGHLIGHTING */

.sql-code {
  display: block;
  font-family: "Courier New", monospace;
  line-height: 1.7;
  white-space: pre-wrap;
}

.sql-keyword {
  color: #cbb8ef;
  font-weight: 700;
}

.sql-string {
  color: #b9ffa9;
}

.sql-number {
  color: #f2c6ff;
}

.sql-operator {
  color: #ffffff;
  font-weight: 700;
}

.sql-comment {
  color: #8b8296;
  font-style: italic;
}

/* ========================================
   DAY 03 — PATH TRAVERSAL
======================================== */

.path-section {
  margin-bottom: 18px;
}

.path-value {
  margin: 8px 0 0;
  padding: 14px 16px;

  background: rgba(0, 0, 0, 0.32);

  border: 1px solid
    rgba(255, 255, 255, 0.08);

  border-radius: 8px;

  color: #e7dff0;

  font-family:
    "Courier New",
    monospace;

  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.path-input {
  color: #cbb8ef;
}

.resolved-path {
  color: #b9ffa9;
}

.traversal-token {
  color: #ff9ccf;
  font-weight: 700;

  background:
    rgba(255, 156, 207, 0.08);

  padding: 2px 3px;

  border-radius: 3px;
}

.path-arrow {
  margin: 16px 0;

  color: #8f83a1;

  font-family:
    "Courier New",
    monospace;

  font-size: 0.7rem;

  letter-spacing: 0.08em;
}

.path-analysis {
  margin: 22px 0;

  padding: 15px;

  background:
    rgba(0, 0, 0, 0.25);

  border-left:
    3px solid #9f83d7;
}

.path-analysis p {
  margin: 8px 0;

  display: flex;
  justify-content: space-between;
  gap: 20px;

  color: #c3b8d2;

  font-family:
    "Courier New",
    monospace;

  font-size: 0.75rem;
}

.path-analysis strong {
  color: #b9ffa9;
}

.file-response {
  margin-top: 20px;
}

.file-response pre {
  margin: 10px 0 0;

  padding: 18px;

  min-height: 65px;

  overflow-x: auto;

  background: #09070d;

  border:
    1px solid rgba(
      255,
      255,
      255,
      0.08
    );

  border-radius: 8px;

  color: #d9d0e4;

  font-family:
    "Courier New",
    monospace;

  font-size: 0.8rem;

  line-height: 1.65;

  white-space: pre-wrap;
}