:root{
  /* Theme */
  --page-bg: #0f172a; /* deep slate */

  --card-width: 900px;
  --card-radius: 14px;
  --card-bg: rgba(255,255,255,.92);
  --card-border: rgba(255,255,255,.20);

  /* Accent (topbar) */
  --topbar-bg: linear-gradient(135deg, #4480ef, #1cb4b9);
  --topbar-text: #ffffff;

  --text: #0f172a;
  --muted: rgba(15, 23, 42, .62);

  --gap: 16px;

  /* Button */
  --btn-bg: linear-gradient(135deg, #22c55e, #16a34a);
  --btn-bg-hover: linear-gradient(135deg, #16a34a, #15803d);
  --btn-text: #ffffff;

  /* Extras */
  --ring: rgba(59, 130, 246, .35);
  --shadow: 0 22px 60px rgba(0,0,0,.35);
  --shadow-soft: 0 10px 30px rgba(0,0,0,.18);
}

/* -------------------------------------------------- */
/* Base reset */
/* -------------------------------------------------- */

*{ box-sizing: border-box; }

html, body{
  height: 100%;
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
}

/* Prevent iOS input zoom */
input, button, select, textarea{
  font-size: 16px;
}

/* -------------------------------------------------- */
/* Page background */
/* -------------------------------------------------- */

.page{
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top))
           max(16px, env(safe-area-inset-right))
           max(18px, env(safe-area-inset-bottom))
           max(16px, env(safe-area-inset-left));
  background:
    radial-gradient(1000px 520px at 20% 10%, rgba(34,197,94,.18), transparent 55%),
    radial-gradient(1000px 520px at 80% 20%, rgba(239,68,68,.18), transparent 55%),
    radial-gradient(900px 500px at 60% 80%, rgba(59,130,246,.16), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0)),
    var(--page-bg);
}

/* -------------------------------------------------- */
/* Card */
/* -------------------------------------------------- */

.card{
  width: min(var(--card-width), 100%);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transform: translateY(0);
  transition: transform .18s ease, box-shadow .18s ease;
}

.card:hover{
  transform: translateY(-2px);
  box-shadow: 0 26px 70px rgba(0,0,0,.42);
}

/* -------------------------------------------------- */
/* Topbar */
/* -------------------------------------------------- */

.card__topbar{
  padding: 16px 18px;
  background: var(--topbar-bg);
  color: var(--topbar-text);
  position: relative;
}

.card__topbar::after{
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 120px at 20% 0%, rgba(255,255,255,.22), transparent 60%);
  pointer-events: none;
}

.card__title{
  margin: 0;
  font-size: 18px;
  font-weight: 750;
  letter-spacing: .2px;
  text-shadow: 0 1px 0 rgba(0,0,0,.12);
}

/* -------------------------------------------------- */
/* Body */
/* -------------------------------------------------- */

.card__body{
  padding: 20px;
  display: grid;
  gap: calc(var(--gap) + 2px);
}

.label{
  margin: 0;
  font-weight: 700;
  letter-spacing: .2px;
}

.form{
  display: grid;
  gap: var(--gap);
}

.field{
  padding: 14px;
  background: rgba(255,255,255,.75);
  border: 1px solid rgba(15,23,42,.12);
  border-radius: 12px;
  box-shadow:
    0 1px 0 rgba(255,255,255,.7) inset,
    var(--shadow-soft);
  transition:
    border-color .15s ease,
    box-shadow .15s ease,
    transform .15s ease;
}

.field:hover{
  border-color: rgba(59,130,246,.25);
}

.field:focus-within{
  border-color: rgba(59,130,246,.55);
  box-shadow: 0 0 0 4px var(--ring), var(--shadow-soft);
  transform: translateY(-1px);
}

.file{
  width: 100%;
  accent-color: #22c55e;
}

/* -------------------------------------------------- */
/* Rows & buttons */
/* -------------------------------------------------- */

.row{
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn{
  justify-self: center;
  padding: 11px 22px;
  border: 0;
  border-radius: 12px;
  background: var(--btn-bg);
  color: var(--btn-text);
  font-weight: 750;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(34,197,94,.25);
  transition:
    transform .12s ease,
    filter .12s ease,
    box-shadow .12s ease;
}

.btn:hover{
  background: var(--btn-bg-hover);
  filter: brightness(1.02);
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(34,197,94,.30);
}

.btn:active{
  transform: translateY(0);
  box-shadow: 0 8px 18px rgba(34,197,94,.22);
}

/* -------------------------------------------------- */
/* Text helpers */
/* -------------------------------------------------- */

.hint{
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.note{
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: rgba(15, 23, 42, .82);
}

/* -------------------------------------------------- */
/* Footer */
/* -------------------------------------------------- */

.card__footer{
  padding: 12px 18px;
  border-top: 1px solid rgba(15,23,42,.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  background: rgba(255,255,255,.55);
}

.link{
  color: #2563eb;
  text-decoration: none;
  font-weight: 650;
}

.link:hover{
  text-decoration: underline;
}

/* -------------------------------------------------- */
/* Status */
/* -------------------------------------------------- */

.status{
  display: flex;
  align-items: center;
  font-size: 14px;
  gap: 8px;
  color: rgba(15, 23, 42, .80);
}

.dot{
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow:
    0 0 0 3px rgba(255,255,255,.7),
    0 6px 14px rgba(0,0,0,.18);
}

.green{
  background: radial-gradient(circle at 30% 30%, #86efac, #16a34a);
}

.red{
  background: radial-gradient(circle at 30% 30%, #fca5a5, #dc2626);
}

/* -------------------------------------------------- */
/* Touch devices (no hover jank) */
/* -------------------------------------------------- */

@media (hover: none){
  .card:hover{
    transform: none;
    box-shadow: var(--shadow);
  }

  .btn:hover{
    transform: none;
    filter: none;
    box-shadow: 0 10px 24px rgba(34,197,94,.25);
  }
}

/* -------------------------------------------------- */
/* Mobile */
/* -------------------------------------------------- */

@media (max-width: 520px){
  :root{
    --gap: 12px;
    --card-radius: 12px;
  }

  .card{
    width: 100%;
    box-shadow: 0 16px 45px rgba(0,0,0,.30);
  }

  .card__topbar{
    padding: 14px;
  }

  .card__title{
    font-size: 16px;
  }

  .card__body{
    padding: 14px;
  }

  .field{
    padding: 12px;
    border-radius: 10px;
  }

  .row{
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .btn{
    width: 100%;
    padding: 12px 18px;
    border-radius: 10px;
  }

  .card__footer{
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* -------------------------------------------------- */
/* Extra small phones */
/* -------------------------------------------------- */

@media (max-width: 360px){
  .card__title{ font-size: 15px; }
  .hint{ font-size: 12px; }
  .note{ font-size: 13px; }
}