/* ================================================================
   ΜΕΤΑΒΛΗΤΕΣ CSS — Light & Dark θέμα
   Όλα τα χρώματα, σκιές και μεταβάσεις ορίζονται εδώ
   ================================================================ */
:root {
  /* Φόντα */
  --bg-page:        #eef0f5;
  --kpi-scale:      1.0;
  --analog-pct:     100;
  --digital-pct:    80;
  --countdown-pct:  80;
  --bg-surface:     #ffffff;
  --bg-card:        #ffffff;
  --bg-card-hover:  #f7f8fc;
  --bg-bar:         #ffffff;
  --bg-input:       #f0f2f7;
  --bg-tab-active:  #1a3a5c;
  --bg-tab-idle:    transparent;

  /* Κείμενο */
  --text-primary:   #1a2b3c;
  --text-secondary: #5a6a7e;
  --text-label:     #8a9ab0;
  --text-on-accent: #ffffff;

  /* Accent */
  --accent:         #1a3a5c;
  --accent-soft:    #e8edf5;

  /* Ρολόι */
  --clock-rim:      #d0d8e8;
  --clock-face:     #ffffff;
  --clock-number:   #1a2b3c;
  --clock-mark:     #b0bccf;
  --hand-hour:      #1a3a5c;
  --hand-minute:    #1a3a5c;
  --hand-second:    #c0392b;
  --center-dot:     #1a3a5c;
  --center-inner:   #ffffff;

  /* Κάρτες KPI */
  --kpi-border:     #e8edf5;
  --kpi-accent-start:  #1a3a5c;
  --kpi-accent-depart: #2e7d52;
  --kpi-accent-end:    #7b2d8b;

  /* Πρόοδος countdown */
  --progress-bg:    #e8edf5;
  --progress-fill:  #1a3a5c;

  /* Toggle */
  --toggle-off:     #c8d0dc;
  --toggle-on:      #1a3a5c;
  --toggle-thumb:   #ffffff;

  /* Διαχωριστές / σκιές */
  --divider:        #e0e6ef;
  --shadow-bar:     0 2px 12px rgba(0,0,0,0.07);
  --shadow-card:    0 2px 16px rgba(0,0,0,0.07);
  --shadow-card-h:  0 4px 24px rgba(0,0,0,0.12);

  /* Μεταβάσεις */
  --transition:     0.22s ease;

  /* Τυπογραφία */
  --font-main:      'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:      'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* ---- Dark mode overrides ---- */
[data-theme="dark"] {
  --bg-page:        #0f1923;
  --bg-surface:     #1a2535;
  --bg-card:        #1e2d42;
  --bg-card-hover:  #243450;
  --bg-bar:         #1a2535;
  --bg-input:       #243450;
  --bg-tab-active:  #4a9eff;
  --text-primary:   #e8f0fe;
  --text-secondary: #8aaac8;
  --text-label:     #5a7a9a;
  --text-on-accent: #ffffff;
  --accent:         #4a9eff;
  --accent-soft:    #1a3050;
  --clock-rim:      #2a3f5a;
  --clock-face:     #1e2d42;
  --clock-number:   #c8daf0;
  --clock-mark:     #3a5272;
  --hand-hour:      #c8daf0;
  --hand-minute:    #c8daf0;
  --hand-second:    #ff6b6b;
  --center-dot:     #4a9eff;
  --center-inner:   #0f1923;
  --kpi-border:     #2a3f5a;
  --kpi-accent-start:  #4a9eff;
  --kpi-accent-depart: #4caf7d;
  --kpi-accent-end:    #c06bd6;
  --progress-bg:    #243450;
  --progress-fill:  #4a9eff;
  --toggle-off:     #2a3f5a;
  --toggle-on:      #4a9eff;
  --divider:        #2a3f5a;
  --shadow-bar:     0 2px 16px rgba(0,0,0,0.4);
  --shadow-card:    0 2px 20px rgba(0,0,0,0.4);
  --shadow-card-h:  0 4px 32px rgba(0,0,0,0.55);
}

/* ================================================================
   RESET & ΒΑΣΗ
================================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
}

/* Όταν ο χρήστης κάνει zoom-in και το περιεχόμενο ξεπερνά το viewport,
   επιτρέπουμε scroll ώστε να μη χάνονται κουμπιά (σαν τον browser zoom). */
html.user-zoomed, html.user-zoomed body {
  overflow: auto;
}

@media (max-width: 768px) {
  html, body {
    height: auto;
    min-height: 100dvh;
    overflow: auto;
  }
}

body {
  font-family: var(--font-main);
  background: var(--bg-page);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  transition: background var(--transition), color var(--transition);
  -webkit-tap-highlight-color: transparent; /* Αφαίρεση flash αφής σε mobile */
}

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

/* ================================================================
   ΕΠΑΝΩ ΜΠΑΡΑ
================================================================ */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: var(--bg-bar);
  box-shadow: var(--shadow-bar);
  z-index: 100;
  flex-shrink: 0;
  transition: background var(--transition), box-shadow var(--transition);
}

.settings-group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}

/* ---- Πεδίο ώρας ---- */
.time-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 0 10px;
}

.field-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-label);
  text-transform: uppercase;
}

.time-input-wrapper {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Τύπος time — αφαίρεση βέλους σε WebKit */
.time-input {
  width: 88px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}
.time-input:focus { border-color: var(--accent); }

.ampm-select {
  padding: 6px 4px;
  border-radius: 8px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.ampm-select:focus { border-color: var(--accent); }

/* Πεδία κειμένου (μάθημα / εισηγητής) */
.text-input {
  width: 160px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}
.text-input:focus { border-color: var(--accent); }

/* ---- Quick Setup button ---- */
.quick-setup-btn {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}
.quick-setup-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
  opacity: 0.8;
}

/* Κάθετος διαχωριστής */
.field-divider {
  width: 1px;
  height: 36px;
  background: var(--divider);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ---- Κουμπιά ελέγχου ---- */
.controls-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.ctrl-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition), border-color var(--transition), transform 0.1s;
}
.ctrl-btn:active { transform: scale(0.96); }
.ctrl-btn:hover { background: var(--accent-soft); border-color: var(--accent); }

.start-now-btn {
  background: var(--accent);
  color: var(--text-on-accent);
  border-color: var(--accent);
}
.start-now-btn:hover { background: var(--accent); opacity: 0.85; border-color: var(--accent); }

.theme-btn {
  width: 44px;
  padding: 8px;
  justify-content: center;
  font-size: 18px;
}
.theme-icon { line-height: 1; }

/* Zoom control group */
.zoom-ctrl-group {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-input);
  border: 1.5px solid var(--divider);
  border-radius: 10px;
  padding: 4px 8px;
  height: 44px;
  box-sizing: border-box;
  cursor: default;
  flex-shrink: 0;
}
.zoom-ctrl-group:hover { border-color: var(--accent); }

.zoom-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  user-select: none;
  padding-right: 2px;
}

.zoom-step-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
  width: 26px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: background var(--transition), transform 0.1s;
  padding: 0;
  flex-shrink: 0;
}
.zoom-step-btn:hover { background: var(--accent-soft); }
.zoom-step-btn:active { transform: scale(0.88); }

.zoom-pct-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 38px;
  text-align: center;
  user-select: none;
}

/* Help button inside settings menu */
.help-menu-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1.5px solid var(--divider);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  text-align: left;
}
.help-menu-btn:hover { background: var(--accent-soft); border-color: var(--accent); }
.help-menu-btn:active { transform: scale(0.98); }

/* ================================================================
   ΚΥΡΙΑ ΠΕΡΙΟΧΗ
================================================================ */
.app-main {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
  padding: 20px;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ================================================================
   ΕΝΟΤΗΤΑ ΡΟΛΟΓΙΟΥ (αριστερά)
================================================================ */
.clock-section {
  background: var(--bg-surface);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  gap: 16px;
  min-height: 0;
  overflow: hidden;
  transition: background var(--transition), box-shadow var(--transition);
}

/* ---- Πληροφορίες εξέτασης (μάθημα, πάνω από ρολόι) ---- */
.exam-info {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 10px 20px;
  min-height: 0;
}

.exam-info:empty { display: none; }

.exam-info-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.exam-info-label {
  font-size: 20px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
  opacity: 0.7;
}

.exam-info-subject {
  font-size: clamp(20px, 2.8vw, 32px);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

/* ---- Layout: side panel + clock center ---- */
.clock-layout {
  display: flex;
  align-items: stretch;
  width: 100%;
  flex: 1;
  min-height: 0;
  gap: 0;
}

.exam-side-panel {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 16px;
  width: 140px;
  flex-shrink: 0;
  padding-right: 12px;
  padding-top: 8px;
}

.side-panel-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.side-panel-group.hidden { display: none; }
.side-panel-divider.hidden { display: none; }

.side-panel-divider {
  height: 1px;
  background: var(--text-secondary);
  opacity: 0.2;
}

.side-panel-title {
  font-size: 30px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
  opacity: 0.7;
}

.side-panel-names {
  font-size: var(--side-panel-font-size, 40px);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  word-break: normal;
  overflow-wrap: normal;
}

.clock-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  min-height: 0;
  gap: 16px;
  position: relative;
}

.clock-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
  flex-shrink: 0;
}

.clock-header-spacer {
  /* left placeholder so tabs stay centered */
}

.clock-date-overlay {
  font-size: var(--side-panel-font-size, 40px);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.06em;
  pointer-events: none;
  white-space: nowrap;
  justify-self: end;

  /* πλαίσιο */
  background: var(--bg-card);
  border: 1.5px solid var(--divider);
  border-radius: 14px;
  padding: 6px 20px;
  box-shadow: var(--shadow-card);
}

/* ---- Tabs ---- */
.view-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-input);
  border-radius: 12px;
  padding: 4px;
  flex-shrink: 0;
}

.tab-btn {
  padding: 9px 22px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
  letter-spacing: 0.02em;
}
.tab-btn.active {
  background: var(--bg-tab-active);
  color: var(--text-on-accent);
}
.tab-btn:not(.active):hover {
  background: var(--accent-soft);
  color: var(--accent);
}

/* ---- Προβολές ---- */
.clock-view {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  container-type: size;
  container-name: clock-view;
}
.clock-view.hidden { display: none; }

/* ================================================================
   ΑΝΑΛΟΓΙΚΟ ΡΟΛΟΙ
================================================================ */
.analog-clock-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.analog-clock {
  width: calc(var(--analog-pct, 100) * 1cqmin);
  height: calc(var(--analog-pct, 100) * 1cqmin);
  filter: drop-shadow(0 6px 24px rgba(0,0,0,0.10));
}

/* SVG στοιχεία ρολογιού */
.clock-rim  { fill: none; stroke: var(--clock-rim); stroke-width: 3; }
.clock-face { fill: var(--clock-face); }

.hand {
  stroke-width: 5;
  transform-origin: 150px 150px;
  transition: transform 0.3s cubic-bezier(0.4, 2.0, 0.55, 0.9); /* "ελαστική" κίνηση */
}
.hour-hand   { stroke: var(--hand-hour);   stroke-width: 7; }
.minute-hand { stroke: var(--hand-minute); stroke-width: 5; }
.second-hand {
  stroke: var(--hand-second);
  stroke-width: 2.5;
  /* Άμεση κίνηση για τον δείκτη δευτερολέπτων */
  transition: none;
}

.center-dot       { fill: var(--center-dot); }
.center-dot-inner { fill: var(--center-inner); }

/* ================================================================
   ΨΗΦΙΑΚΟ ΡΟΛΟΙ
================================================================ */
.digital-clock-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.digital-time {
  font-family: var(--font-mono);
  font-size: calc(var(--digital-pct, 80) * 0.24cqw);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.digital-seconds {
  font-size: 0.55em;
  color: var(--text-secondary);
  font-weight: 500;
  transition: opacity var(--transition);
}
.digital-seconds.hidden-sec { opacity: 0; }

.digital-date {
  font-size: 15px;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ================================================================
   ΑΝΤΙΣΤΡΟΦΗ ΜΕΤΡΗΣΗ
================================================================ */
.countdown-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 100%;
}

.countdown-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-label);
}

.countdown-time {
  font-family: var(--font-mono);
  font-size: calc(var(--countdown-pct, 80) * 0.24cqw);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.countdown-seconds {
  font-size: 0.55em;
  color: var(--text-secondary);
  font-weight: 500;
  transition: opacity var(--transition);
}
.countdown-seconds.hidden-sec { opacity: 0; }

/* Μπάρα προόδου */
.countdown-progress-wrap {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--progress-bg);
  overflow: hidden;
}
.countdown-progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--progress-fill);
  width: 100%;
  transition: width 1s linear, background 0.5s;
}

/* Κόκκινη μπάρα όταν απομένουν < 10 λεπτά */
.countdown-progress-bar.urgent { background: #e74c3c; }

/* ================================================================
   TOGGLE SWITCH
================================================================ */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.toggle-label input[type="checkbox"] { display: none; }

.toggle-track {
  width: 44px;
  height: 24px;
  border-radius: 12px;
  background: var(--toggle-off);
  position: relative;
  transition: background var(--transition);
  flex-shrink: 0;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--toggle-thumb);
  transition: transform var(--transition);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.toggle-label input:checked + .toggle-track {
  background: var(--toggle-on);
}
.toggle-label input:checked + .toggle-track .toggle-thumb {
  transform: translateX(20px);
}

.toggle-text {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ================================================================
   ΚΑΡΤΕΣ KPI (δεξιά στήλη)
================================================================ */
.kpi-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
  overflow-y: auto;
}

.kpi-card {
  background: var(--bg-card);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  transition: background var(--transition), box-shadow var(--transition), transform 0.15s;
  border-left: 4px solid transparent;
  min-height: 0;
  overflow: hidden;
  word-break: break-word;
  container-type: inline-size;
}
.kpi-card:hover {
  box-shadow: var(--shadow-card-h);
  transform: translateY(-2px);
}

/* Χρωματική ταυτότητα ανά κάρτα */
#kpiStart  { border-left-color: var(--kpi-accent-start); }
#kpiDepart { border-left-color: var(--kpi-accent-depart); }
#kpiEnd    { border-left-color: var(--kpi-accent-end); }

.kpi-title {
  font-size: clamp(11px, 1.4vw, 18px);
  font-weight: 800;
  letter-spacing: 0.10em;
  color: var(--text-primary);
  text-transform: uppercase;
  line-height: 1.25;
}

#kpiStart .kpi-title,
#kpiEnd .kpi-title {
  font-size: clamp(20px, 2.8vw, 34px);
}

.kpi-time {
  font-family: var(--font-mono);
  font-size: min(calc(clamp(30px, 4.2vw, 52px) * var(--kpi-scale, 1)), 30cqi);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.1;
  white-space: nowrap;
}

#kpiStart  .kpi-time { color: var(--kpi-accent-start); }
#kpiDepart .kpi-time { color: var(--kpi-accent-depart); }
#kpiEnd    .kpi-time { color: var(--kpi-accent-end); }

.kpi-status {
  font-size: clamp(10px, 1.1vw, 16px);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-transform: uppercase;
  line-height: 1.3;
}

.kpi-depart-countdown {
  font-size: clamp(11px, 1.2vw, 16px);
  font-weight: 600;
  color: var(--kpi-accent-depart);
  margin-top: 2px;
  line-height: 1.3;
}

/* ================================================================
   FOOTER
================================================================ */
.seo-h1 {
  position: absolute;
  top: 4px;
  left: 0;
  right: 0;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-label);
  margin: 0;
  text-align: center;
  pointer-events: none;
  opacity: 0.6;
  z-index: 0;
}

.app-footer {
  position: fixed;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: var(--text-secondary);
  opacity: 0.75;
  white-space: nowrap;
  pointer-events: none;
  z-index: 1;
  letter-spacing: 0.03em;
  text-align: center;
}

.seo-tagline {
  font-size: 9px;
  color: var(--text-label);
  margin: 0 0 2px;
  white-space: normal;
  letter-spacing: 0.01em;
}
.app-footer a {
  color: inherit;
  pointer-events: auto;
  text-decoration: none;
}
.app-footer .footer-site-link,
.app-footer .footer-site-link:hover,
.app-footer .footer-site-link:visited {
  color: #2563eb;
  text-decoration: none;
}
.app-footer a:hover {
  opacity: 0.8;
  text-decoration: underline;
}
.app-footer .footer-site-link:hover {
  opacity: 0.8;
  text-decoration: none;
}

/* ================================================================
   ΕΝΔΕΙΞΗ ΠΗΓΗΣ ΩΡΑΣ
================================================================ */
.time-source {
  position: fixed;
  bottom: 8px;
  right: 14px;
  font-size: 10px;
  color: var(--text-label);
  letter-spacing: 0.06em;
  pointer-events: none;
  opacity: 0.7;
}
.time-source--warn {
  color: #c07000;
  opacity: 0.9;
}
.time-source--error {
  color: #c03000;
  opacity: 0.9;
}

/* ================================================================
   ΠΛΗΡΗΣ ΟΘΟΝΗ
   Κρύβουμε την μπάρα ρυθμίσεων, μεγεθύνουμε περιεχόμενο
================================================================ */
:fullscreen .top-bar,
:-webkit-full-screen .top-bar,
:-moz-full-screen .top-bar {
  display: none;
}

:fullscreen .seo-h1,
:-webkit-full-screen .seo-h1,
:-moz-full-screen .seo-h1 {
  display: none;
}

:fullscreen .app-main,
:-webkit-full-screen .app-main,
:-moz-full-screen .app-main {
  padding: 16px;
  height: 100vh;
  grid-template-columns: 1fr 340px;
}

/* Clocks auto-scale via container queries in fullscreen — no overrides needed */

:fullscreen .kpi-card,
:-webkit-full-screen .kpi-card,
:-moz-full-screen .kpi-card {
  padding: 24px 28px;
  gap: 10px;
}

/* Βοηθητική κλάση — κρύβουμε σύντομο κείμενο στη default κατάσταση */
.btn-short-text { display: none; }

/* ================================================================
   RESPONSIVE — intermediate screens
   (laptops 1366px, ή μεγάλες οθόνες με OS zoom 125-150%)
================================================================ */
@media (max-width: 1440px) {
  .top-bar {
    gap: 8px;
    padding: 10px 16px;
  }
  .text-input { width: 145px; }
  .time-field { padding: 0 8px; }
  .ctrl-btn { padding: 8px 12px; gap: 5px; }
  .controls-group { gap: 6px; }
}

/* Σχολικές/διαδραστικές οθόνες: 1920×1080 @ 150% OS zoom = ~1280px CSS viewport */
@media (max-width: 1280px) {
  .top-bar {
    gap: 6px;
    padding: 8px 14px;
  }
  .text-input { width: 120px; }
  .time-input { width: 82px; }
  .time-field { padding: 0 6px; }
  .field-label { font-size: 8px; }
  .btn-full-text { display: none; }
  .btn-short-text { display: inline; }
  .ctrl-label { display: none; }
  .ctrl-btn { gap: 0; padding: 8px 10px; }
  .controls-group { gap: 6px; }
}

/* ================================================================
   RESPONSIVE — tablet & mobile
================================================================ */
@media (max-width: 900px) {
  .app-main {
    grid-template-columns: 1fr 260px;
  }
}

@media (max-width: 768px) {
  /* Επαναφορά scroll για mobile */
  html, body {
    height: auto;
    min-height: 100dvh;
    overflow: auto;
  }

  body {
    overflow-y: auto;
  }

  /* Top bar: κάθετη διάταξη σε mobile */
  .top-bar {
    flex-direction: column;
    align-items: stretch;
    padding: 10px 12px;
    gap: 8px;
  }

  /* Κρύβουμε τους κάθετους διαχωριστές — το gap αρκεί */
  .top-bar .field-divider {
    display: none;
  }

  /* Το auto-zoom διαχειρίζεται το fitting — δεν τυλίγουμε */
  .settings-group {
    flex-wrap: nowrap;
    overflow-x: visible;
    gap: 8px 6px;
    width: auto;
  }

  /* Πεδία κειμένου (μάθημα/εισηγητής): μεγαλώνουν για να γεμίσουν τη γραμμή */
  .time-field:has(.text-input) {
    flex: 1 1 140px;
    min-width: 130px;
    padding: 0 4px;
  }

  .text-input {
    width: 100%;
    font-size: 14px;
  }

  /* Πεδία ώρας: σταθερό πλάτος */
  .time-field:has(.time-input) {
    flex: 0 0 auto;
    padding: 0 4px;
  }

  .time-field {
    padding: 0 4px;
  }

  .time-input {
    width: 82px;
    font-size: 15px;
  }

  /* Κουμπιά ελέγχου: το auto-zoom διαχειρίζεται το fitting */
  .controls-group {
    flex-wrap: nowrap;
    justify-content: center;
    gap: 6px;
    width: auto;
  }

  .ctrl-btn {
    min-height: 44px;
    padding: 10px 14px;
  }

  .theme-btn {
    min-height: 44px;
    width: 44px;
    padding: 10px;
  }

  .app-main {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    height: auto;
    min-height: 0;
    overflow: visible;
    padding: 12px;
    gap: 12px;
  }

  .clock-section {
    min-height: 320px;
    overflow: visible;
  }

  .exam-side-panel {
    display: none;
  }

  .kpi-section {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: visible;
    gap: 10px;
    padding-bottom: 10px;
    min-height: 0;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
  }

  .kpi-card {
    min-width: 200px;
    flex: 0 0 auto;
    overflow: visible;
    scroll-snap-align: start;
  }

  .tab-btn {
    padding: 9px 16px;
    font-size: 13px;
  }
}


@media (max-width: 480px) {
  /* Κρύβουμε τις ετικέτες — μένουν μόνο τα εικονίδια */
  .ctrl-label {
    display: none;
  }

  /* Σύντομο κείμενο για το κουμπί "Τώρα" */
  .btn-full-text { display: none; }
  .btn-short-text { display: inline; }

  .ctrl-btn {
    padding: 10px 12px;
    min-height: 44px;
  }

  .time-field {
    padding: 0 3px;
  }

  .text-input {
    width: 100%;
    font-size: 13px;
  }

  .time-input {
    width: 74px;
    font-size: 14px;
  }

  .app-main {
    padding: 8px;
    gap: 8px;
  }

  .clock-section {
    padding: 12px;
    min-height: 290px;
  }

  .kpi-card {
    min-width: 170px;
    padding: 14px 16px;
  }

  .tab-btn {
    padding: 8px 12px;
    font-size: 12px;
  }
}

/* ================================================================
   iOS SAFE AREA (notch / home bar)
================================================================ */
@supports (padding: env(safe-area-inset-bottom)) {
  @media (max-width: 768px) {
    body {
      padding-bottom: env(safe-area-inset-bottom);
    }

    .top-bar {
      padding-left: max(12px, env(safe-area-inset-left));
      padding-right: max(12px, env(safe-area-inset-right));
    }
  }
}


/* ================================================================
   PAUSE BANNER
================================================================ */
.pause-banner {
  background: #e67e22;
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  flex-shrink: 0;
  z-index: 90;
}
.pause-banner.hidden { display: none; }

/* ================================================================
   SCREEN FLASH (Notification)
================================================================ */
@keyframes screenFlash {
  0%, 60% { background: rgba(255, 220, 0, 0.55); }
  100%     { background: transparent; }
}

body.screen-flash::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  animation: screenFlash 0.9s ease-out forwards;
  z-index: 9000;
}

/* ================================================================
   KPI NOTIFICATION COLOR VARIANTS
================================================================ */
#kpiEnd.notif-30 {
  border-left-color: #e67e22;
  background: rgba(230, 126, 34, 0.08);
  transition: background 0.4s, border-left-color 0.4s;
}
#kpiEnd.notif-15 {
  border-left-color: #e74c3c;
  background: rgba(231, 76, 60, 0.10);
  transition: background 0.4s, border-left-color 0.4s;
}

/* ================================================================
   MENU DRAWER
================================================================ */
.menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 200;
  display: none;
}
.menu-backdrop.open { display: block; }

.menu-drawer {
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 360px;
  max-width: 95vw;
  background: var(--bg-surface);
  box-shadow: 4px 0 32px rgba(0, 0, 0, 0.18);
  z-index: 210;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s linear 0.28s;
  overflow: hidden;
}
.menu-drawer.open {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s linear 0s;
}

.menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--divider);
  flex-shrink: 0;
}

.menu-title {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

.menu-close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
  border: none;
  cursor: pointer;
}
.menu-close-btn:hover { background: var(--accent-soft); color: var(--accent); }

.menu-body {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
  display: flex;
  flex-direction: column;
}

.menu-section {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.menu-section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-label);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}

.menu-divider {
  height: 1px;
  background: var(--divider);
  margin: 0;
  flex-shrink: 0;
}

.menu-hint {
  font-size: 11px;
  color: var(--text-label);
  line-height: 1.5;
  margin-top: -2px;
}

/* ---- Παράταση Χρόνου ---- */
.time-ext-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ext-btn {
  padding: 9px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform 0.1s;
}
.ext-btn:active { transform: scale(0.95); }
.ext-btn:hover  { background: var(--accent); color: var(--text-on-accent); }

/* ---- Ειδοποιήσεις ---- */
.notif-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.notif-master {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.notif-master input[type="checkbox"] { display: none; }

/* Οπτική αλλαγή toggle όταν είναι checked */
.notif-master input:checked + .toggle-track {
  background: var(--toggle-on);
}
.notif-master input:checked + .toggle-track .toggle-thumb {
  transform: translateX(20px);
}

.notif-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.notif-sub {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 54px;
  transition: opacity var(--transition);
}
.notif-sub.disabled { opacity: 0.38; pointer-events: none; }

.sub-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}
.sub-check input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ---- KPI Scale Slider ---- */
.scale-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.scale-row-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.scale-slider {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
  height: 4px;
}

.scale-readout {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0;
}

.scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-label);
  margin-top: -4px;
}

/* ---- Pause Toggle ---- */
.pause-toggle-btn {
  padding: 12px 20px;
  border-radius: 12px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 700;
  width: 100%;
  text-align: center;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.pause-toggle-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.pause-toggle-btn.paused {
  border-color: #e67e22;
  background: rgba(230, 126, 34, 0.1);
  color: #e67e22;
}

/* ---- Preset Buttons ---- */
.preset-btn {
  padding: 11px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  width: 100%;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: background var(--transition), border-color var(--transition);
}
.preset-btn:hover { border-color: var(--accent); background: var(--accent-soft); }

.preset-name {
  font-weight: 700;
  font-size: 14px;
}
.preset-detail {
  font-size: 11px;
  color: var(--text-label);
  font-weight: 500;
}

/* ================================================================
   END SCREEN OVERLAY
================================================================ */
.end-screen-overlay {
  position: fixed;
  inset: 0;
  background: #c0392b;
  z-index: 5000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.end-screen-overlay.hidden { display: none; }

.end-screen-text {
  font-size: clamp(48px, 12vw, 120px);
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.06em;
  text-align: center;
  padding: 0 20px;
  animation: endFlash 1.2s ease-in-out infinite alternate;
}
.end-screen-hint {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 28px;
  letter-spacing: 0.06em;
}

@keyframes endFlash {
  from { opacity: 1; }
  to   { opacity: 0.3; }
}

/* ================================================================
   HELP MODAL
================================================================ */
.help-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.help-backdrop.open { display: flex; }

.help-modal {
  background: var(--bg-surface);
  border-radius: 20px;
  box-shadow: var(--shadow-card-h);
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.help-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--divider);
  flex-shrink: 0;
}

.help-modal-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
}

.help-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition);
}
.help-modal-close:hover { background: var(--accent-soft); color: var(--accent); }

.help-modal-body {
  overflow-y: auto;
  padding: 8px 0 16px;
}

.help-item {
  padding: 14px 24px;
  border-bottom: 1px solid var(--divider);
}
.help-item:last-child { border-bottom: none; }

.help-item-title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.help-item-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ================================================================
   QUICK SETUP MODAL
================================================================ */
.qs-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.qs-backdrop.hidden { display: none; }

.qs-modal {
  background: var(--bg-surface);
  border-radius: 22px;
  box-shadow: var(--shadow-card-h);
  width: 100%;
  max-width: 460px;
  overflow: hidden;
  animation: qsFadeIn 0.18s ease-out;
}

@keyframes qsFadeIn {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to   { opacity: 1; transform: scale(1)    translateY(0); }
}

.qs-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--divider);
}

.qs-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.qs-subtitle {
  font-size: 12px;
  color: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-top: 3px;
  text-transform: uppercase;
}

.qs-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}
.qs-close:hover { background: var(--accent-soft); color: var(--accent); }

.qs-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.qs-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 0;
}

.qs-divider {
  height: 1px;
  background: var(--divider);
}

.qs-section-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-label);
}

.qs-btn-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.qs-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 14px 8px;
  border-radius: 14px;
  border: 1.5px solid var(--divider);
  background: var(--bg-input);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), transform 0.1s, box-shadow var(--transition);
}
.qs-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.qs-btn:active { transform: scale(0.95); }

.qs-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-on-accent);
  box-shadow: 0 4px 14px rgba(26, 58, 92, 0.30);
}

[data-theme="dark"] .qs-btn.active {
  box-shadow: 0 4px 14px rgba(74, 158, 255, 0.30);
}

.qs-offset {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1;
}

.qs-calc-time {
  font-size: 11px;
  font-weight: 600;
  opacity: 0.72;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  line-height: 1;
}

.qs-btn.active .qs-calc-time { opacity: 0.85; }

@media (max-width: 480px) {
  .qs-btn-group {
    grid-template-columns: repeat(2, 1fr);
  }
  .qs-modal {
    border-radius: 18px;
  }
}