/* Cloud Networking Day 2026 — barvy a písmo podle minulého ročníku (CND2025). */

:root {
  --navy: #15284c;
  --cyan: #00bceb;
  --cyan-hover: #00a5d0;
  --cyan-light: #d9f5fc;
  --grey-bg: #ececec;
  --line: #cbcbcb;
  --muted: #58585b;
  --error: #c8102e;
  --radius: 6px;
  --gutter: 24px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #fff;
  color: var(--navy);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cyan);
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

.wrap {
  max-width: 848px; /* 800 px obsahu + okraje */
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* --- Tlačítko (zaoblené azurové jako v referenci) --- */

.button {
  display: inline-block;
  padding: 10px 28px;
  border: 0;
  border-radius: 999px;
  background: var(--cyan);
  color: #fff;
  font: bold 17px/1.3 Arial, Helvetica, sans-serif;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s;
}

.button:hover {
  background: var(--cyan-hover);
}

.button:focus-visible,
.link-button:focus-visible {
  outline: 3px solid var(--navy);
  outline-offset: 2px;
}

.button-large {
  padding: 14px 40px;
  font-size: 18px;
}

.button[disabled] {
  opacity: 0.6;
  cursor: progress;
}

/* --- Úvodní obrázek --- */

.hero {
  position: relative;
  overflow: hidden;
  background: #aebfe6;
}

/* Na monitorech širších než obrázek ho po stranách doplní jeho rozmazaná kopie. */
.hero::before {
  content: "";
  position: absolute;
  inset: -60px;
  background: url("/img/hero.jpg") center / cover no-repeat;
  filter: blur(40px);
}

.hero img {
  position: relative;
  display: block;
  width: 100%;
  max-width: 1390px;
  height: auto;
  margin: 0 auto;
}

@media (min-width: 1391px) {
  .hero img {
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 80px, #000 calc(100% - 80px), transparent);
    mask-image: linear-gradient(90deg, transparent, #000 80px, #000 calc(100% - 80px), transparent);
  }
}

/* --- Pruh s datem a místem pod obrázkem --- */

.facts {
  border-bottom: 1px solid var(--line);
}

.facts-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.facts-text {
  margin: 0;
  font-weight: bold;
  font-size: 18px;
}

.facts-date {
  color: var(--cyan);
}

.facts-sep {
  margin: 0 0.5em;
  color: var(--line);
}

/* --- Úvodní text --- */

.intro {
  padding-top: 48px;
  padding-bottom: 16px;
}

.intro h1 {
  font-size: 30px;
  margin-bottom: 24px;
}

.intro-end {
  font-weight: bold;
}

/* --- Program --- */

.program {
  padding-top: 32px;
  padding-bottom: 16px;
}

h2 {
  color: var(--cyan);
  font-size: 26px;
}

.agenda {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  line-height: 1.35;
}

.agenda td {
  padding: 10px 0;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.agenda tr:last-child td {
  border-bottom: 0;
}

.agenda-time {
  width: 130px;
  padding-left: 16px !important;
  padding-right: 16px !important;
  font-weight: bold;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.agenda-title {
  display: block;
  color: var(--cyan);
  font-weight: bold;
}

.agenda-speaker {
  display: block;
  font-style: italic;
  font-size: 15px;
}

.agenda-break td {
  background: var(--cyan-light);
  border-bottom: 0;
  padding-top: 9px;
  padding-bottom: 9px;
}

.agenda-break td:last-child {
  padding-right: 16px;
}

/* Dva zvýrazněné řádky za sebou oddělí tenká bílá linka. */
.agenda-break + .agenda-break td {
  border-top: 2px solid #fff;
}

.agenda-break .agenda-title {
  color: var(--navy);
}

.agenda-break .agenda-speaker {
  font-style: normal;
  font-weight: bold;
}

/* Řádek po zvýrazněném bloku nepotřebuje horní čáru, blok pod ním ano. */
.agenda tr:has(+ .agenda-break) td {
  border-bottom: 0;
}

/* --- Termín a místo --- */

.venue {
  margin: 32px 0 0;
  padding: 18px 16px;
  background: var(--grey-bg);
  font-weight: bold;
  line-height: 1.4;
}

.venue > div {
  display: flex;
  gap: 16px;
}

.venue > div + div {
  margin-top: 10px;
}

.venue dt {
  flex: 0 0 114px;
  color: var(--cyan);
}

.venue dd {
  margin: 0;
}

.venue-date {
  color: var(--cyan);
}

/* --- Registrační formulář --- */

.register {
  padding-top: 40px;
  padding-bottom: 56px;
  scroll-margin-top: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 24px;
}

.field-wide {
  grid-column: 1 / -1;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-weight: bold;
  font-size: 15px;
}

.req {
  color: var(--cyan);
  margin-left: 2px;
}

.field input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--navy);
  font: 17px/1.3 Arial, Helvetica, sans-serif;
}

.field input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 188, 235, 0.3);
}

.field input[aria-invalid="true"] {
  border-color: var(--error);
}

.field-error {
  margin: 6px 0 0;
  color: var(--error);
  font-size: 14px;
  line-height: 1.35;
}

.form-message {
  margin: 0 0 20px;
  padding: 12px 16px;
  border-left: 4px solid var(--error);
  background: #fdecee;
  color: var(--error);
  font-weight: bold;
}

.form-note {
  margin: 16px 0 4px;
  font-size: 14px;
  color: var(--muted);
}

.form-approval {
  margin: 0 0 24px;
  font-weight: bold;
  font-size: 15px;
}

/* Honeypot mimo obrazovku (ne display:none, to někteří roboti poznají). */
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-success {
  padding: 24px;
  background: var(--cyan-light);
  border-radius: var(--radius);
  outline: none;
}

.form-success h3 {
  font-size: 22px;
}

.form-success p {
  margin: 0;
}

/* --- Patička --- */

.footer {
  padding: 20px var(--gutter) 28px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 13px;
  line-height: 1.6;
  color: #999;
}

.footer p {
  margin: 0;
}

.footer a {
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

.footer-copy {
  color: var(--muted);
}

/* --- Mobil --- */

@media (max-width: 600px) {
  :root {
    --gutter: 16px;
  }

  body {
    font-size: 16px;
  }

  .facts-inner {
    justify-content: center;
    text-align: center;
  }

  .intro {
    padding-top: 32px;
  }

  .intro h1 {
    font-size: 23px;
  }

  h2 {
    font-size: 22px;
  }

  /* Program: čas nad názvem přednášky. */
  .agenda,
  .agenda tbody,
  .agenda tr,
  .agenda td {
    display: block;
    width: auto;
  }

  .agenda tr {
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
  }

  .agenda tr:last-child,
  .agenda tr:has(+ .agenda-break) {
    border-bottom: 0;
  }

  .agenda td,
  .agenda tr:has(+ .agenda-break) td {
    padding: 0 !important;
    border: 0;
    background: none;
  }

  .agenda-time {
    margin-bottom: 2px;
    font-size: 14px;
  }

  .agenda-break {
    background: var(--cyan-light);
    border-bottom: 0;
  }

  .agenda-break + .agenda-break {
    border-top: 2px solid #fff;
  }

  .agenda-break + .agenda-break td {
    border-top: 0;
  }

  .venue > div {
    flex-direction: column;
    gap: 0;
  }

  .venue dt {
    flex-basis: auto;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .button-large {
    width: 100%;
  }
}

/* --- Přehled registrací (/admin) --- */

.admin {
  font-size: 15px;
}

.admin-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px var(--gutter) 48px;
}

.admin h1 {
  color: var(--navy);
  font-size: 26px;
  margin: 0;
}

.admin .count {
  display: inline-block;
  min-width: 1.6em;
  padding: 0 0.4em;
  border-radius: 999px;
  background: var(--cyan-light);
  font-size: 18px;
  text-align: center;
  vertical-align: middle;
}

.admin-login {
  max-width: 360px;
  margin-top: 24px;
}

.admin-login label {
  display: block;
  margin-bottom: 6px;
  font-weight: bold;
}

.admin-login input {
  width: 100%;
  margin-bottom: 12px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: 17px Arial, Helvetica, sans-serif;
  color: var(--navy);
}

.admin-login .field-error {
  margin: -4px 0 12px;
}

.admin-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.admin-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.admin-actions form {
  margin: 0;
}

.link-button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.table-scroll {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.admin-table th {
  background: var(--cyan-light);
  white-space: nowrap;
}

.admin-table tbody tr:hover {
  background: #f6f6f6;
}

.nowrap {
  white-space: nowrap;
}