/* ========================================
   WORLD CLOCK TERMINAL — STYLE.CSS
======================================== */

/* ----------------------------------------
   THEME COLOR SYSTEM
---------------------------------------- */

:root {
  --page-background:
    radial-gradient(circle at top, rgba(30, 104, 106, 0.25), transparent 42%),
    #071419;

  --app-background: rgba(10, 29, 35, 0.97);

  --primary-text: #edf6f5;
  --heading-text: #f4fbfa;
  --secondary-text: #91aeb2;
  --muted-text: #839fa3;

  --accent: #8ad2cf;
  --accent-soft: #7cc7c5;
  --accent-dark: #061316;

  --time-primary: #fff7dd;
  --time-secondary: #f4d98b;

  --border: #2c5960;
  --border-strong: #3a6d73;

  --input-background: #0c2228;
  --input-dark: #091c22;
  --placeholder-text: #66868a;

  --panel-hover: rgba(138, 210, 207, 0.05);
  --button-hover: #a2dfdc;

  --hero-background: linear-gradient(
    180deg,
    rgba(22, 74, 79, 0.34),
    rgba(10, 29, 35, 0)
  );

  --travel-background: linear-gradient(
    180deg,
    rgba(22, 74, 79, 0.38),
    rgba(10, 29, 35, 0.4)
  );

  --focus-shadow: rgba(138, 210, 207, 0.13);
  --theme-hover: rgba(138, 210, 207, 0.07);
}
/* ----------------------------------------
   CYBERPUNK THEME
---------------------------------------- */
body.cyberpunk-theme {
  --page-background:
    radial-gradient(circle at 20% 0%, rgba(0, 245, 255, 0.2), transparent 30%),
    radial-gradient(
      circle at 85% 10%,
      rgba(255, 79, 216, 0.22),
      transparent 28%
    ),
    linear-gradient(135deg, #05030d, #0c0619 45%, #070b16);

  --app-background: rgba(11, 5, 24, 0.96);

  --primary-text: #f8f5ff;
  --heading-text: #ffffff;
  --secondary-text: #c9bdd8;
  --muted-text: #8f82a3;

  --accent: #00f5ff;
  --accent-soft: #ff4fd8;
  --accent-dark: #06030d;

  --time-primary: #ffffff;
  --time-secondary: #ffe76a;

  --border: #391553;
  --border-strong: #9c36c9;

  --input-background: #140821;
  --input-dark: #0d0418;
  --placeholder-text: #82728f;

  --panel-hover: rgba(0, 245, 255, 0.07);
  --button-hover: #6afaff;

  --hero-background: linear-gradient(
    180deg,
    rgba(255, 79, 216, 0.15),
    rgba(0, 245, 255, 0.025)
  );

  --travel-background: linear-gradient(
    180deg,
    rgba(0, 245, 255, 0.13),
    rgba(255, 79, 216, 0.065)
  );

  --focus-shadow: rgba(0, 245, 255, 0.22);
  --theme-hover: rgba(255, 79, 216, 0.11);
}

/* ----------------------------------------
   TROPICAL SUNSET THEME
---------------------------------------- */

body.sunset-theme {
  --page-background:
    radial-gradient(circle at top, rgba(255, 185, 90, 0.28), transparent 34%),
    linear-gradient(180deg, #3b1740, #6f2957 48%, #21142f);

  --app-background: rgba(58, 23, 64, 0.95);

  --primary-text: #fff7ef;
  --heading-text: #fffaf4;
  --secondary-text: #e9c4b5;
  --muted-text: #c89da8;

  --accent: #ffb55e;
  --accent-soft: #ff7d7d;
  --accent-dark: #351425;

  --time-primary: #fff6d2;
  --time-secondary: #ffc86c;

  --border: #8c4c73;
  --border-strong: #c9718d;

  --input-background: #4b2148;
  --input-dark: #351536;
  --placeholder-text: #c89da8;

  --panel-hover: rgba(255, 181, 94, 0.08);
  --button-hover: #ffc982;

  --hero-background: linear-gradient(
    180deg,
    rgba(255, 125, 125, 0.18),
    rgba(255, 181, 94, 0.03)
  );

  --travel-background: linear-gradient(
    180deg,
    rgba(255, 181, 94, 0.15),
    rgba(111, 41, 87, 0.18)
  );

  --focus-shadow: rgba(255, 181, 94, 0.2);
  --theme-hover: rgba(255, 125, 125, 0.1);
}

/* ----------------------------------------
   THEME-SPECIFIC EFFECTS
---------------------------------------- */
body.cyberpunk-theme .world-clock {
  box-shadow:
    0 28px 80px rgba(0, 0, 0, 0.6),
    0 0 45px rgba(0, 245, 255, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

body.cyberpunk-theme .terminal-label {
  text-shadow: 0 0 12px rgba(255, 79, 216, 0.45);
}

body.cyberpunk-theme h1 {
  text-shadow:
    0 0 12px rgba(0, 245, 255, 0.2),
    0 0 24px rgba(255, 79, 216, 0.12);
}

body.cyberpunk-theme .theme-selector {
  box-shadow: 0 0 20px rgba(156, 54, 201, 0.12);
}

body.cyberpunk-theme .theme-selector .active-theme {
  box-shadow:
    inset 0 0 16px rgba(255, 255, 255, 0.18),
    0 0 18px rgba(0, 245, 255, 0.35);
}

body.cyberpunk-theme .clock-card.local-clock-card h2 {
  text-shadow: 0 0 12px rgba(0, 245, 255, 0.35);
}

body.cyberpunk-theme .clock-card.local-clock-card .time,
body.cyberpunk-theme .clock-card.travel-clock-card .time {
  text-shadow:
    0 0 16px rgba(0, 245, 255, 0.2),
    0 0 30px rgba(255, 79, 216, 0.08);
}

body.cyberpunk-theme .clock-card:hover {
  box-shadow: inset 3px 0 0 var(--accent);
}

body.cyberpunk-theme .custom-location button {
  box-shadow: 0 0 18px rgba(0, 245, 255, 0.25);
}

body.cyberpunk-theme .custom-location button:hover {
  box-shadow: 0 0 26px rgba(0, 245, 255, 0.42);
}

body.sunset-theme .world-clock {
  box-shadow:
    0 30px 80px rgba(20, 5, 24, 0.42),
    0 0 38px rgba(255, 181, 94, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

body.sunset-theme .terminal-label {
  text-shadow: 0 0 12px rgba(255, 125, 125, 0.25);
}

body.sunset-theme h1 {
  text-shadow: 0 0 18px rgba(255, 181, 94, 0.12);
}

body.sunset-theme .theme-selector .active-theme {
  box-shadow: 0 0 18px rgba(255, 181, 94, 0.22);
}

body.sunset-theme .clock-card.local-clock-card .time,
body.sunset-theme .clock-card.travel-clock-card .time {
  text-shadow: 0 0 16px rgba(255, 181, 94, 0.13);
}
/* ----------------------------------------
   1. GLOBAL RESET
---------------------------------------- */

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: 32px 16px;

  color: var(--primary-text);
  background: var(--page-background);

  font-family: "Space Grotesk", sans-serif;
}

button,
input,
select {
  font: inherit;
}

/* ----------------------------------------
   2. MAIN APP CONTAINER
---------------------------------------- */

.world-clock {
  width: 100%;
  max-width: 980px;

  margin: 0 auto;

  background: var(--app-background);

  border: 1px solid var(--border);

  box-shadow:
    0 28px 80px rgba(0, 0, 0, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

/* ----------------------------------------
   3. HEADER
---------------------------------------- */

header {
  padding: 30px;

  text-align: center;

  border-bottom: 1px solid var(--border);
}

.terminal-label {
  margin: 0 0 8px;

  color: var(--accent-soft);

  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;

  color: var(--heading-text);

  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.subtitle {
  margin: 8px 0 0;

  color: var(--secondary-text);

  font-size: 15px;
}

/* ----------------------------------------
   4. THEME SELECTOR
---------------------------------------- */

.theme-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);

  width: min(560px, calc(100% - 40px));

  margin: 22px auto 0;

  border: 1px solid var(--border-strong);
}

.theme-selector button {
  padding: 11px 12px;

  color: var(--secondary-text);
  background: transparent;

  border: none;
  border-right: 1px solid var(--border-strong);

  font-size: 12px;
  font-weight: 600;

  cursor: pointer;

  transition:
    color 0.2s ease,
    background 0.2s ease;
}

.theme-selector button:last-child {
  border-right: none;
}

.theme-selector button:hover {
  color: var(--heading-text);
  background: var(--theme-hover);
}

.theme-selector .active-theme {
  color: var(--accent-dark);
  background: var(--accent);
}

/* ----------------------------------------
   5. CITY SELECTOR
---------------------------------------- */

.city-selector {
  width: 100%;
  max-width: 700px;

  margin: 26px auto 30px;
  padding: 0 24px;

  text-align: center;
}

.city-selector > label {
  display: block;

  margin-bottom: 12px;

  color: var(--primary-text);

  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.city-selector select {
  width: 100%;
  padding: 13px 15px;

  color: var(--primary-text);
  background: var(--input-background);

  border: 1px solid var(--border-strong);
  outline: none;

  font-size: 14px;

  cursor: pointer;

  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.city-selector select:focus {
  border-color: var(--accent);

  box-shadow: 0 0 0 3px var(--focus-shadow);
}

.city-selector option {
  color: var(--primary-text);
  background: var(--input-background);
}

/* ----------------------------------------
   6. CUSTOM LOCATION INPUT
---------------------------------------- */

.custom-location {
  display: none;

  margin-top: 20px;

  text-align: center;
}

.custom-location.visible {
  display: block;
}

.custom-location > label {
  display: block;

  margin-bottom: 14px;

  color: var(--secondary-text);

  font-size: 16px;
  font-weight: 600;
}

.custom-location-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.custom-location input {
  width: 100%;
  max-width: 430px;
  padding: 13px 15px;

  color: var(--primary-text);
  background: var(--input-dark);

  border: 1px solid var(--border-strong);
  outline: none;

  font-size: 15px;
}

.custom-location input::placeholder {
  color: var(--placeholder-text);
}

.custom-location input:focus {
  border-color: var(--accent);

  box-shadow: 0 0 0 3px var(--focus-shadow);
}

.custom-location button {
  min-width: 180px;
  padding: 12px 18px;

  color: var(--accent-dark);
  background: var(--accent);

  border: 1px solid var(--accent);

  font-weight: 700;

  cursor: pointer;

  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

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

.custom-location button:active {
  transform: translateY(1px);
}

/* ----------------------------------------
   7. TRAVEL CLOCK
---------------------------------------- */

.travel-clock {
  padding: 42px 30px;

  border-top: 1px solid var(--border);
}

.clock-card.travel-clock-card {
  width: 100%;
  max-width: 650px;

  margin: 0 auto;
  padding: 36px 28px;

  text-align: center;

  background: var(--travel-background);

  border: 1px solid var(--border-strong);
}

.travel-label {
  margin: 0 0 12px;

  color: var(--accent-soft);

  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.clock-card.travel-clock-card h2 {
  margin: 0 0 16px;

  color: var(--heading-text);

  font-size: 24px;
  text-align: center;
  text-transform: none;
}

.clock-card.travel-clock-card .time {
  margin: 10px 0 0;

  color: var(--time-primary);

  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(38px, 8vw, 54px);
  font-weight: 700;
  text-align: center;
}

.clock-card.travel-clock-card .date {
  margin: 12px 0 0;

  color: var(--secondary-text);

  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  text-align: center;
}

#return-button {
  margin-top: 24px;
  padding: 11px 17px;

  color: var(--secondary-text);
  background: transparent;

  border: 1px solid var(--border-strong);

  font-weight: 600;

  cursor: pointer;

  transition:
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

#return-button:hover {
  color: var(--accent-dark);
  background: var(--accent);
  border-color: var(--accent);
}

/* ----------------------------------------
   8. CLOCK GRID
---------------------------------------- */

.clock-grid {
  display: grid;
  grid-template-columns: 1fr;

  border-top: 1px solid var(--border);
}

/* ----------------------------------------
   9. LOCAL HERO CLOCK
---------------------------------------- */

.clock-card.local-clock-card {
  position: relative;

  grid-column: 1 / -1;

  padding: 48px 30px;

  text-align: center;

  background: var(--hero-background);

  border-right: none;
  border-bottom: 1px solid var(--border);
}

.clock-card.local-clock-card::before,
.clock-card.local-clock-card::after {
  position: absolute;
  top: 28px;

  width: 17%;

  border-top: 1px solid var(--border-strong);

  content: "";
}

.clock-card.local-clock-card::before {
  left: 30px;
}

.clock-card.local-clock-card::after {
  right: 30px;
}

.clock-card.local-clock-card h2 {
  margin: 0 0 14px;

  color: var(--accent);

  font-size: 15px;
  letter-spacing: 0.14em;
  text-align: center;
  text-transform: uppercase;
}

.clock-card.local-clock-card .time {
  margin: 0;

  color: var(--time-primary);

  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(40px, 8vw, 58px);
  font-weight: 700;
  text-align: center;
}

.clock-card.local-clock-card .date {
  margin: 12px 0 0;

  color: var(--secondary-text);

  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  text-align: center;
}

/* ----------------------------------------
   10. WORLD CLOCK PANELS
---------------------------------------- */

.clock-card {
  padding: 25px 30px;

  background: transparent;

  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;

  text-align: left;

  transition:
    background 0.2s ease,
    color 0.2s ease;
}

.clock-card:hover {
  background: var(--panel-hover);
}

.clock-grid .clock-card:not(.local-clock-card) {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;

  border-right: none;
}

.clock-grid .clock-card:not(.local-clock-card) h2 {
  flex: 1;
  min-width: 0;
  margin: 0;

  color: var(--primary-text);

  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.clock-grid .clock-card:not(.local-clock-card) .date {
  display: none;
}

.clock-grid .clock-card:not(.local-clock-card) .time {
  margin: 0;

  color: var(--time-secondary);

  font-family: "IBM Plex Mono", monospace;
  font-size: 27px;
  font-weight: 700;
  text-align: right;
  white-space: nowrap;
}

/* ----------------------------------------
   11. FOOTER
---------------------------------------- */

footer {
  margin: 0;
  padding: 18px;

  color: var(--muted-text);

  border-top: 1px solid var(--border);

  font-size: 12px;
  text-align: center;
}

/* ----------------------------------------
   12. RESPONSIVE DESIGN
---------------------------------------- */

@media (max-width: 650px) {
  body {
    padding: 12px;
  }

  .world-clock {
    width: 100%;

    padding: 0;

    border-radius: 0;
  }

  header {
    padding: 24px 18px;
  }

  h1 {
    font-size: 30px;
  }

  .theme-selector {
    grid-template-columns: 1fr;

    width: calc(100% - 36px);
  }

  .theme-selector button {
    border-right: none;
    border-bottom: 1px solid var(--border-strong);
  }

  .theme-selector button:last-child {
    border-bottom: none;
  }

  .city-selector {
    margin: 24px auto 28px;
    padding: 0 18px;
  }

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

  .clock-grid .clock-card:not(.local-clock-card) {
    gap: 16px;

    padding: 20px 18px;
  }

  .clock-grid .clock-card:not(.local-clock-card) h2 {
    font-size: 13px;
  }

  .clock-grid .clock-card:not(.local-clock-card) .time {
    font-size: 21px;
  }

  .clock-card.local-clock-card {
    padding: 42px 18px;
  }

  .clock-card.local-clock-card::before,
  .clock-card.local-clock-card::after {
    display: none;
  }

  .clock-card.local-clock-card .time {
    font-size: clamp(34px, 11vw, 48px);
  }

  .travel-clock {
    padding: 32px 18px;
  }

  .clock-card.travel-clock-card {
    padding: 32px 18px;
  }

  .clock-card.travel-clock-card .time {
    font-size: clamp(34px, 11vw, 46px);
  }

  footer {
    margin-top: 0;
    padding: 18px;
  }
}