/* =========================================================
   ItalSab — Report Carburante
   Mobile-first · Dark mode · Industrial / Brand
   ========================================================= */

/* ---------- Reset & basics ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

:root {
  /* Brand */
  --teal: #00a89a;
  --teal-deep: #008080;
  --teal-glow: rgba(0, 168, 154, 0.35);
  --violet: #8b48c4;
  --violet-deep: #7b3fa0;
  --violet-glow: rgba(139, 72, 196, 0.32);

  /* Dark surfaces */
  --bg-0: #070a13;
  --bg-1: #0a0e1a;
  --bg-2: #111726;
  --bg-3: #1a2235;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);

  /* Text */
  --text: #e7ecf5;
  --text-dim: #9aa4bd;
  --text-mute: #6b748c;

  /* Feedback */
  --ok: #22c98a;
  --ok-bg: rgba(34, 201, 138, 0.12);
  --err: #ff5d6c;
  --err-bg: rgba(255, 93, 108, 0.1);

  /* Type */
  --font-display: "Bebas Neue", "Impact", sans-serif;
  --font-body: "Sora", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Layout */
  --radius: 12px;
  --radius-lg: 18px;
  --gap: 14px;
  --pad: 18px;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-0);
  overflow-x: hidden;
  position: relative;
  /* Safe areas iOS */
  padding:
    env(safe-area-inset-top)
    env(safe-area-inset-right)
    env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}

/* ---------- Decorative background ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 80%);
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  z-index: 0;
  width: 70vw;
  height: 70vw;
  max-width: 600px;
  max-height: 600px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  pointer-events: none;
}

.bg-glow--teal {
  top: -20vw;
  left: -20vw;
  background: var(--teal-glow);
}

.bg-glow--violet {
  bottom: -20vw;
  right: -25vw;
  background: var(--violet-glow);
}

/* ---------- App container ---------- */
.app {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin: 0 auto;
  padding: 24px 18px 40px;
}

/* ---------- Brand / Header ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.brand__mark {
  position: relative;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  overflow: hidden;
}

.brand__bar {
  position: absolute;
  width: 100%;
  height: 50%;
}
.brand__bar--teal {
  top: 0;
  background: linear-gradient(135deg, var(--teal), var(--teal-deep));
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
}
.brand__bar--violet {
  bottom: 0;
  background: linear-gradient(135deg, var(--violet), var(--violet-deep));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand__title {
  display: flex;
  flex-direction: column;
  line-height: 1;
  font-family: var(--font-display);
  letter-spacing: 0.03em;
}

.brand__title-main {
  font-size: 28px;
  background: linear-gradient(90deg, var(--teal) 0%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand__title-sub {
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.18em;
  margin-top: 4px;
}

.brand__tag {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-mute);
}

/* ---------- Form ---------- */
.form {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.form__group {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px 16px 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent 30%),
    var(--bg-1);
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.form__legend {
  padding: 0 8px;
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--teal);
  background: var(--bg-0);
}

/* ---------- Field ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
}

.field__label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.field__input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px; /* 16px previene zoom iOS */
  font-weight: 500;
  color: var(--text);
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 14px 14px;
  transition: border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
  -webkit-appearance: none;
  appearance: none;
}

.field__input::placeholder {
  color: var(--text-mute);
  font-weight: 400;
}

.field__input:focus {
  outline: none;
  border-color: var(--teal);
  background: var(--bg-3);
  box-shadow: 0 0 0 3px rgba(0, 168, 154, 0.18);
}

.field__input:invalid:not(:placeholder-shown) {
  /* lasciamo gestire al JS la visualizzazione errore */
}

.field__input--mono {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.field__input--num {
  font-family: var(--font-mono);
  font-weight: 600;
  /* nasconde frecce numero su tutti i browser */
  -moz-appearance: textfield;
}
.field__input--num::-webkit-outer-spin-button,
.field__input--num::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Select */
.field__select-wrap {
  position: relative;
}

.field__select {
  padding-right: 44px;
  cursor: pointer;
}

.field__select-arrow {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--teal);
  pointer-events: none;
  font-size: 16px;
}

/* Unit suffix */
.field__unit-wrap {
  position: relative;
}
.field__unit {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-mute);
  pointer-events: none;
}
.field__input--num {
  padding-right: 44px;
}

.field__error {
  display: none;
  font-size: 12px;
  color: var(--err);
  padding-left: 2px;
  font-weight: 500;
}
.field.is-error .field__error {
  display: block;
}
.field.is-error .field__input {
  border-color: var(--err);
  box-shadow: 0 0 0 3px rgba(255, 93, 108, 0.15);
}

/* ---------- Photo upload ---------- */
.photo-drop {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-2);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.photo-drop:hover,
.photo-drop:focus-within {
  border-color: var(--teal);
  background: var(--bg-3);
}

.photo-drop__input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.photo-drop__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--teal-deep), var(--violet-deep));
  color: #fff;
}
.photo-drop__icon svg {
  width: 22px;
  height: 22px;
}

.photo-drop__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.photo-drop__text strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.photo-drop__text small {
  font-size: 12px;
  color: var(--text-mute);
}

/* Thumbnail list */
.photo-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 4px;
}
.photo-list:empty {
  display: none;
}

.photo-item {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-3);
  border: 1px solid var(--line-strong);
  animation: pop 0.25s ease;
}

.photo-item__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-item__remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: rgba(7, 10, 19, 0.85);
  color: #fff;
  font-size: 16px;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background 0.15s ease, transform 0.15s ease;
}
.photo-item__remove:hover,
.photo-item__remove:active {
  background: var(--err);
  transform: scale(1.08);
}

.photo-item__index {
  position: absolute;
  bottom: 4px;
  left: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: rgba(7, 10, 19, 0.7);
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

@keyframes pop {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

/* ---------- Submit ---------- */
.submit {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  min-height: 56px;
  padding: 16px 20px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.15em;
  color: #fff;
  background: linear-gradient(90deg, var(--teal-deep) 0%, var(--violet-deep) 100%);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.18s ease, opacity 0.2s ease;
  box-shadow:
    0 8px 24px rgba(0, 168, 154, 0.22),
    0 2px 6px rgba(139, 72, 196, 0.25);
}

.submit::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--teal) 0%, var(--violet) 100%);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.submit:hover::before,
.submit:active::before {
  opacity: 1;
}

.submit > * {
  position: relative;
  z-index: 1;
}

.submit:active {
  transform: translateY(1px);
}

.submit__arrow {
  width: 20px;
  height: 20px;
}

.submit__spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.submit.is-loading {
  pointer-events: none;
  opacity: 0.85;
}
.submit.is-loading .submit__arrow { display: none; }
.submit.is-loading .submit__spinner { display: inline-block; }

.submit:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* ---------- Feedback ---------- */
.feedback {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  animation: slideIn 0.3s ease;
}
.feedback.is-visible { display: flex; }

.feedback.is-success {
  background: var(--ok-bg);
  color: var(--ok);
  border: 1px solid rgba(34, 201, 138, 0.3);
}

.feedback.is-error {
  background: var(--err-bg);
  color: var(--err);
  border: 1px solid rgba(255, 93, 108, 0.3);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Footer ---------- */
.footer {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--teal-deep), transparent);
}

.footer__text {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mute);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- Tablet+ refinements ---------- */
@media (min-width: 640px) {
  .app {
    padding: 40px 24px 60px;
  }
  .brand__title-main { font-size: 34px; }
  .photo-list { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Reduce motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}