:root {
  --bg: #0b0d1a;
  --card: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #eef1ff;
  --muted: #9aa0c0;
  --primary: #6c5ce7;
  --primary-2: #00d2ff;
  --accent: #ff6b9d;
  --danger: #ff5c6c;
  --ok: #2ee6a6;
  --radius: 18px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  transition: background 0.5s ease;
  background:
    radial-gradient(40rem 40rem at 15% -10%, rgba(108, 92, 231, 0.35), transparent 60%),
    radial-gradient(35rem 35rem at 110% 10%, rgba(0, 210, 255, 0.25), transparent 55%),
    radial-gradient(40rem 40rem at 50% 120%, rgba(255, 107, 157, 0.2), transparent 60%);
}

/* ===== Κουμπιά ===== */
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
  border: none;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s;
  box-shadow: 0 6px 20px rgba(108, 92, 231, 0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(108, 92, 231, 0.55); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--card-border);
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text); }
.btn-ghost.on { color: var(--ok); border-color: var(--ok); }

/* ===== Οθόνη σύνδεσης ===== */
.auth-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: max(1.5rem, env(safe-area-inset-top)) 1.5rem max(1.5rem, env(safe-area-inset-bottom));
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  text-align: center;
}

.brand { font-size: 1.8rem; font-weight: 800; letter-spacing: -0.02em; }
.subtitle { color: var(--muted); margin-top: 0.5rem; margin-bottom: 1.8rem; }

.tabs {
  display: flex;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 999px;
  padding: 0.3rem;
  margin-bottom: 1.5rem;
}
.tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 0.6rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.tab.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: white;
}

form { display: flex; flex-direction: column; gap: 1rem; text-align: left; }
label { display: flex; flex-direction: column; gap: 0.4rem; font-size: 0.9rem; color: var(--muted); font-weight: 500; }

input {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 0.8rem 1rem;
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.25);
}
/* Κάνει ορατό το εικονίδιο ημερομηνίας στο dark theme */
input[type="datetime-local"]::-webkit-calendar-picker-indicator { filter: invert(1); opacity: 0.7; cursor: pointer; }

/* Πεδίο ημερομηνίας + κουμπί ΟΚ που κλείνει το ημερολόγιο */
.date-row { display: flex; gap: 8px; align-items: stretch; }
.date-row input { flex: 1; min-width: 0; }
.btn-ok {
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 0 1.1rem;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}
.btn-ok:active { transform: scale(0.97); }

.google-wrap { margin-top: 1.3rem; }
.divider {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 1.1rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--card-border);
}
#google-btn { display: flex; justify-content: center; }

.error {
  color: var(--danger);
  font-size: 0.88rem;
  background: rgba(255, 92, 108, 0.1);
  border: 1px solid rgba(255, 92, 108, 0.3);
  padding: 0.6rem 0.8rem;
  border-radius: 10px;
}

/* ===== Κύρια εφαρμογή ===== */
.app-screen {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
  padding-left: max(1.5rem, env(safe-area-inset-left));
  padding-right: max(1.5rem, env(safe-area-inset-right));
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 0 1.5rem;
  border-bottom: 1px solid var(--card-border);
}
.brand-sm { font-size: 1.3rem; font-weight: 800; }
.header-by { display: block; margin-top: 2px; font-size: 0.72rem; color: var(--muted); }
.header-by a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--card-border); }
.header-by a:hover { color: var(--primary-2); border-color: var(--primary-2); }
.user-box { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.user-email {
  color: var(--muted);
  font-size: 0.9rem;
  max-width: 45vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.add-bar { margin: 1.5rem 0; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.plan-status { color: var(--muted); font-size: 0.9rem; }
.btn-upgrade {
  margin-left: auto;
  background: linear-gradient(135deg, #ffb020, #ff7a59);
  color: #2c1700;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(255, 140, 40, 0.35);
  transition: transform 0.15s;
}
.btn-upgrade:hover { transform: translateY(-2px); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  background: #14172a;
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 0.9rem 1.3rem;
  border-radius: 14px;
  box-shadow: var(--shadow);
  z-index: 80;
  max-width: 90vw;
  text-align: center;
}
.toast.ok { border-color: var(--ok); }

/* ===== Swiper (μία σελίδα ανά countdown) ===== */
.swiper {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.swiper::-webkit-scrollbar { display: none; }
.swiper.dragging { scroll-snap-type: none; cursor: grabbing; }

.slide {
  flex: 0 0 100%;
  box-sizing: border-box;
  padding: 0 0.3rem;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  display: flex;
}
.cd-card.slide-card {
  width: 100%;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(160deg, var(--c1), var(--c2));
  border: none;
  border-radius: 24px;
  padding: 2.5rem 1.5rem;
  position: relative;
}
.cd-card.slide-card:hover { transform: none; }
.cd-card.slide-card::before { display: none; }
.slide-card .cd-actions { position: absolute; top: 1rem; right: 1rem; }
.slide-card .icon-btn { color: rgba(255, 255, 255, 0.85); }
.slide-card .icon-btn:hover { color: #fff; background: rgba(255, 255, 255, 0.18); }
.slide-card .cd-title { font-size: 1.7rem; color: #fff; margin-bottom: 0.3rem; }
.slide-card .cd-date { color: rgba(255, 255, 255, 0.85); margin-bottom: 1.8rem; }
.slide-card .cd-timer { width: 100%; max-width: 440px; }
.slide-card .cd-unit { background: rgba(0, 0, 0, 0.22); }
.slide-card .cd-num { color: #fff; font-size: 2.3rem; }
.slide-card .cd-label { color: rgba(255, 255, 255, 0.85); }
.slide-card .cd-done { color: #fff; font-size: 1.6rem; }

/* Κουκκίδες πλοήγησης */
.dots { display: flex; justify-content: center; gap: 8px; margin-top: 1rem; min-height: 10px; }
.dot {
  width: 8px; height: 8px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: var(--card-border);
  cursor: pointer;
  transition: width 0.2s, background 0.2s;
}
.dot.active { width: 24px; background: var(--text); }

.empty { text-align: center; color: var(--muted); margin-top: 4rem; font-size: 1.05rem; }

/* ===== Κάρτα countdown ===== */
.cd-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.4rem;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  transition: transform 0.15s, border-color 0.15s;
}
.cd-card:hover { transform: translateY(-3px); border-color: rgba(255, 255, 255, 0.25); }
.cd-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-2), var(--accent));
}
.cd-card.past::before { background: var(--ok); }

.cd-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.5rem; margin-bottom: 0.3rem; }
.cd-title { font-size: 1.15rem; font-weight: 700; word-break: break-word; }
.cd-date { color: var(--muted); font-size: 0.85rem; margin-bottom: 1.1rem; }

.cd-timer { display: flex; gap: 0.5rem; justify-content: space-between; }
.cd-unit {
  flex: 1;
  text-align: center;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 12px;
  padding: 0.7rem 0.3rem;
}
.cd-num { font-size: 1.7rem; font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1; }
.cd-label { font-size: 0.65rem; text-transform: uppercase; color: var(--muted); letter-spacing: 0.05em; margin-top: 0.35rem; }

.cd-done {
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ok);
  padding: 1rem 0;
}

.cd-actions { display: flex; gap: 0.5rem; }
.icon-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.2rem 0.4rem;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}
.icon-btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.08); }
.icon-btn.del:hover { color: var(--danger); }

/* ===== Modal ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 15, 0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 50;
}
.modal-card {
  width: 100%;
  max-width: 440px;
  background: #14172a;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-height: 90dvh;
  overflow-y: auto;
}
.modal-card h2 { margin-bottom: 1.3rem; font-size: 1.3rem; }
.modal-actions { display: flex; gap: 0.8rem; justify-content: flex-end; margin-top: 0.5rem; }

/* ===== Προτροπή εγκατάστασης (PWA) ===== */
.install-btn {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 70;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border: none;
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(108, 92, 231, 0.5);
}
.install-btn:active { transform: scale(0.97); }

.ios-install {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 70;
  background: #14172a;
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 1rem 2.4rem 1rem 1rem;
  border-radius: 14px;
  box-shadow: var(--shadow);
  font-size: 0.92rem;
  line-height: 1.5;
}
.ios-close {
  position: absolute;
  top: 0.5rem;
  right: 0.6rem;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
}

/* ===== Footer / brand ===== */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.6rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.site-footer a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid var(--card-border);
  transition: color 0.15s, border-color 0.15s;
}
.site-footer a:hover { color: var(--primary-2); border-color: var(--primary-2); }
.site-footer .dot { color: var(--card-border); }
.app-footer {
  margin-top: 3rem;
  padding: 1.5rem 0 calc(1.5rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--card-border);
}

[hidden] { display: none !important; }

/* ===== Mobile ===== */
@media (max-width: 640px) {
  .app-screen { padding: 1rem; padding-top: max(1rem, env(safe-area-inset-top)); }

  .app-header { padding: 0.5rem 0 1.1rem; gap: 0.7rem; }
  .brand-sm { font-size: 1.1rem; }
  .user-box { gap: 0.5rem; }
  .btn-ghost { padding: 0.55rem 0.9rem; font-size: 0.9rem; }

  /* Full-width κουμπί προσθήκης */
  .add-bar { margin: 1.1rem 0; }
  #open-add { width: 100%; }
  .slide-card { min-height: 64vh; padding: 2rem 1.1rem; }
  .slide-card .cd-title { font-size: 1.45rem; }
  .slide-card .cd-num { font-size: 1.9rem; }
  .slide-card .cd-unit { padding: 0.6rem 0.15rem; }

  /* Πιο άνετα tap targets */
  .icon-btn { padding: 0.5rem 0.6rem; font-size: 1.15rem; }
  .tab { padding: 0.7rem; }

  .cd-card { padding: 1.2rem; }
  .cd-num { font-size: 1.55rem; }
  .cd-unit { padding: 0.65rem 0.2rem; }

  .modal { padding: 1rem; align-items: center; }
  .modal-card { padding: 1.5rem; max-width: none; max-height: 85dvh; }
  /* Το κουμπί αποθήκευσης πάντα ορατό κάτω-κάτω, με χώρο από το ημερολόγιο */
  .modal-actions { position: sticky; bottom: -1.5rem; background: #14172a; padding: 0.8rem 0 0.3rem; }
}

@media (max-width: 380px) {
  .brand { font-size: 1.5rem; }
  .auth-card { padding: 1.8rem 1.1rem; }
  .cd-num { font-size: 1.35rem; }
  .cd-label { font-size: 0.6rem; }
}

/* Σεβασμός στην προτίμηση «λιγότερη κίνηση» */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .cd-card:hover, .btn-primary:hover { transform: none; }
}