/* ─── Vntro Stylesheet ─── */
/* ======= Theme Variables =============================================== */
:root {
  /* Palette: light */
  --bg:        #f6f7f8;
  --surface:   #ffffff;
  --surface-2: #e9ecef;
  --text:      #222;
  --muted:     #555;
  --primary:   #115791;
  --primary-2: #0051cb;
  --accent:    #e28418;
  --shadow:    0 2px 8px rgb(0 0 0 / 0.08);

  /* Calc helpers */
  --radius:    0.75rem;
  --space:     1rem;
  --max:       1280px;

  /* Shop logic */
  --tax:       0.08;    /* 8% */
  --ship-fee:  5;       /* flat USD */
}

/* Palette: dark-theme override */
html[data-theme='dark'] {
  --bg:        #0e1521;
  --surface:   #1b2534;
  --surface-2: #263246;
  --text:      #e4e7ec;
  --muted:     #9babc4;
  --shadow:    0 2px 8px rgb(0 0 0 / 0.9);
}

/* ======= Reset / Base ================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
  line-height: 1.6;
  transition: background 0.25s, color 0.25s;
}

body {
  margin: 0;
}

img {
  max-width: 100%;
  display: block;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.container {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--space);
}

a {
  color: inherit;
  text-decoration: none;
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-block: 1.5rem;
}

/* = Header = */
.site-header {
  background: var(--surface);
  box-shadow: var(--shadow);
}

.flex-between {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: var(--space);
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo .accent {
  color: var(--accent);
}

.logo .dotnet {
  color: var(--primary);
}

.nav-list {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-list a {
  position: relative;
  font-weight: 500;
}

.nav-list a::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  bottom: -0.2em;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s;
}

.nav-list a:hover::after {
  transform: scaleX(1);
}

.mode-switch {
  margin-left: auto;
}

.mode-switch input {
  width: 1.2rem;
  height: 1.2rem;
}

/* = Hero = */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #fff;
  padding-block: 4rem;
}

.hero-grid {
  text-align: center;
  max-width: 48rem;
}

.hero h2 {
  font-size: clamp(1.8rem, 3vw + 1rem, 3rem);
  margin: 0 0 0.75rem;
}

.typewriter {
  color: var(--accent);
  border-right: 2px solid currentColor;
  padding-inline: 2px;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% { border-color: transparent; }
}

.btn-cta {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  background: #fff;
  color: var(--primary);
  font-weight: 600;
}

/* = Shop / Products = */
.shop {
  padding-block: 3rem;
}

.product-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 2rem;
  margin-block: 1.5rem;
}

.product {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s;
}

.product:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgb(0 0 0 / 0.12);
}

.product h3 {
  margin: 0.75rem 0 0.5rem;
}

.product p {
  color: var(--muted);
  flex-grow: 1;
}

.product button {
  margin-top: 1rem;
  padding: 0.5rem;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.product button.remove {
  background: #d92d20;
}

/* = Cart = */
.cart {
  margin-top: 3rem;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.cart h3 {
  margin-top: 0;
}

#cart-items {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  display: grid;
  gap: 0.5rem;
  font-size: 0.95rem;
}

#cart-items li {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--surface-2);
  padding-bottom: 0.25rem;
}

.totals div {
  display: flex;
  justify-content: space-between;
  margin-block: 0.25rem;
}

.grand dt,
.grand dd {
  font-weight: 700;
}

#checkout {
  width: 100%;
  margin-top: 1rem;
  padding: 0.75rem;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: #222;
  font-weight: 600;
  cursor: pointer;
}

/* = Contact Form = */
.contact {
  padding-block: 3rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

.field {
  margin-block: 1rem;
}

label {
  font-weight: 500;
}

input,
textarea {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid var(--surface-2);
  border-radius: var(--radius);
  background: var(--surface);
  color: inherit;
}

textarea {
  min-height: 7rem;
  resize: vertical;
}

.error-msg {
  color: #e54242;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

input.error,
textarea.error {
  border-color: #e54242;
}

button[type=submit] {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

/* = Footer = */
.site-footer {
  background: var(--surface);
  margin-top: 3rem;
  padding-block: 1rem;
  text-align: center;
  font-size: 0.875rem;
}

/* = Fade-in Util = */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s, transform 0.6s;
}

.fade-in.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* = Media Queries = */
@media (max-width: 48rem) {
  .flex-between {
    flex-wrap: wrap;
    gap: 1rem;
  }

  .mode-switch {
    margin-inline-start: 0;
  }

  .hero {
    padding-block: 5rem 4rem;
  }
}