@import url("https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap");

:root {
  --color-bg-deep: #0a1628;
  --color-bg-mid: #132f4c;
  --color-navy: #0d2137;
  --color-ice: #f4f8fc;
  --color-accent: #4a9fd4;
  --color-accent-bright: #7cc8ff;
  --color-white: #ffffff;
  --primary-color: #1e4d72;
  --secondary-color: #4a9fd4;
  --gradient-page: linear-gradient(180deg, #f4f8fc 0%, #e8eef6 55%, #f4f8fc 100%);
  --gradient-hero: linear-gradient(155deg, #071222 0%, #0d2137 32%, #163d5c 62%, #0a1f33 100%);
  --gradient-nav: linear-gradient(90deg, #061018 0%, #0d2137 40%, #152a45 100%);
  --gradient-tabs: linear-gradient(135deg, rgba(74, 159, 212, 0.95) 0%, rgba(26, 69, 108, 0.98) 100%);
  --gradient-btn: linear-gradient(135deg, #4a9fd4 0%, #1e4d72 100%);
  --shadow-soft: 0 0.5rem 2rem rgba(7, 18, 34, 0.35);
  --shadow-card: 0 0.75rem 2.5rem rgba(10, 28, 48, 0.12);
  --radius: 0.75rem;
  --radius-lg: 1rem;
}

.color-primary {
  color: var(--color-accent-bright) !important;
}

body {
  overflow-x: hidden;
  background: var(--gradient-page);
  color: #1a2d3d;
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
}

.vertical-center {
  display: flex;
  align-items: center;
}

.site-navbar {
  background: var(--gradient-nav);
  box-shadow: var(--shadow-soft);
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.site-navbar .navbar-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-white) !important;
}

.site-navbar .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.88) !important;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  transition: color 0.2s ease, background 0.2s ease;
}

.site-navbar .navbar-nav .nav-link:hover,
.site-navbar .navbar-nav .nav-link:focus {
  color: var(--color-white) !important;
  background: rgba(255, 255, 255, 0.08);
}

.site-navbar .navbar-nav .nav-item.active .nav-link {
  color: var(--color-white) !important;
  background: rgba(124, 200, 255, 0.18);
}

.site-navbar .navbar-toggler {
  border-color: rgba(255, 255, 255, 0.35);
}

.site-navbar .navbar-toggler-icon {
  filter: invert(1);
}

.site-navbar .dropdown-menu {
  background: rgba(13, 33, 55, 0.96);
  border: 1px solid rgba(124, 200, 255, 0.2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.site-navbar .dropdown-item {
  color: rgba(255, 255, 255, 0.9);
}

.site-navbar .dropdown-item:hover,
.site-navbar .dropdown-item:focus {
  background: rgba(124, 200, 255, 0.15);
  color: var(--color-white);
}

.site-navbar .dropdown-item.active {
  background: rgba(74, 159, 212, 0.35);
  color: var(--color-white);
}

.site-hero {
  position: relative;
  min-height: 72vh;
  margin-bottom: 0;
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.95);
}

.site-hero .container {
  z-index: 10;
}

.tool-hero__title {
  font-size: clamp(1.65rem, 2.8vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--color-white);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}

.tool-hero__lead {
  font-size: clamp(0.95rem, 1.35vw, 1.08rem);
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.82);
  max-width: 52rem;
}

.jumbotron {
  margin-bottom: 0;
}

.nav-tabs {
  border-bottom: 0;
  background: var(--gradient-tabs);
  box-shadow: 0 0.35rem 1.5rem rgba(12, 40, 66, 0.45);
  border-radius: var(--radius-lg);
  padding: 0.45rem;
  flex-wrap: wrap;
  gap: 0.15rem;
}

.nav-tabs .nav-link {
  border-radius: var(--radius);
  border: 0;
  color: rgba(255, 255, 255, 0.92) !important;
  font-weight: 500;
  font-size: 0.875rem;
}

.nav-tabs .nav-link:hover {
  background: rgba(255, 255, 255, 0.12);
}

.nav-tabs .nav-link.active {
  background: var(--color-white) !important;
  color: var(--color-bg-deep) !important;
  box-shadow: 0 0.25rem 1rem rgba(0, 0, 0, 0.12);
}

.nav-tabs.qr-type-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}

.qr-type-tabs .nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  height: 100%;
}

.qr-type-tabs .nav-link .fa {
  flex-shrink: 0;
}

.site-hero .box-widget .qr-type-tabs-label {
  color: #5a6d7d !important;
  font-weight: 600;
}

@media (max-width: 767.98px) {
  .nav.nav-tabs.qr-type-tabs {
    display: flex !important;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.35rem;
    padding: 0.6rem 0.95rem 0.7rem !important;
    margin-bottom: 0.25rem;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    scrollbar-width: thin;
    overscroll-behavior-x: contain;
    scroll-padding-inline: 0.95rem;
  }

  .nav.nav-tabs.qr-type-tabs::-webkit-scrollbar {
    height: 5px;
  }

  .nav.nav-tabs.qr-type-tabs::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.35);
    border-radius: 999px;
  }

  .qr-type-tabs .nav-item {
    float: none;
    flex: 0 0 auto;
    width: auto;
    margin: 0;
    scroll-snap-align: start;
  }

  .qr-type-tabs .nav-item:first-child {
    margin-left: 0.1rem;
  }

  .qr-type-tabs .nav-item:last-child {
    margin-right: 0.1rem;
  }

  .qr-type-tabs .nav-link {
    flex-direction: column;
    padding: 0.4rem 0.55rem !important;
    font-size: 0.7rem;
    line-height: 1.15;
    min-height: 2.85rem;
    min-width: 4.25rem;
    border-radius: 0.55rem !important;
    gap: 0.2rem;
  }

  .qr-type-tabs .nav-link .fa {
    font-size: 1.15rem;
  }

  .qr-type-tabs .nav-link .qr-type-tabs__text {
    display: block;
    max-width: 5.2rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
  }
}

@media (min-width: 768px) {
  .qr-type-tabs .nav-link {
    font-size: 0.875rem;
    padding: 0.45rem 0.55rem !important;
  }

  .qr-type-tabs .nav-link .qr-type-tabs__text {
    white-space: normal;
  }
}

.qr-result--img {
  margin-bottom: 1.5rem;
  max-width: 100%;
}

@media (min-width: 768px) {
  .qr-mobile-result {
    display: none !important;
  }
}

.qr-mobile-result__loader {
  margin: 0 auto;
}

.box {
  z-index: 10;
}

.box-text--heading {
  font-weight: 700;
  letter-spacing: 0.06em;
}

.box-widget {
  margin-top: 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(124, 200, 255, 0.12);
  box-shadow: var(--shadow-card);
  padding: 1.7rem;
  padding-top: 2rem;
}

.site-hero .box-widget {
  backdrop-filter: blur(8px);
  /* Hero dùng chữ trắng; thẻ nền trắng phải tự reset để mọi label/placeholder đọc được */
  color: #1a2d3d !important;
}

.site-hero .box-widget .form-group > label,
.site-hero .box-widget .form-group label,
.site-hero .box-widget label.form-label,
.site-hero .box-widget legend {
  color: #0d2137 !important;
  font-weight: 600;
}

.site-hero .box-widget label.logo-preview__img {
  color: #0d2137 !important;
  font-weight: 600;
}

/* Ô nhập kế thừa từ .site-hero nếu không khai báo màu — ép tông tối */
.site-hero .box-widget .form-control,
.site-hero .box-widget textarea.form-control,
.site-hero .box-widget select.form-control,
.site-hero .box-widget input.form-control {
  color: #1a2d3d !important;
}

.site-hero .box-widget .form-control::placeholder,
.site-hero .box-widget textarea.form-control::placeholder,
.site-hero .box-widget input.form-control::placeholder {
  color: #5a6d7d !important;
  opacity: 1;
}

.site-hero .box-widget input.form-control::-webkit-input-placeholder,
.site-hero .box-widget textarea.form-control::-webkit-input-placeholder {
  color: #5a6d7d !important;
}

.site-hero .box-widget input.form-control::-moz-placeholder,
.site-hero .box-widget textarea.form-control::-moz-placeholder {
  color: #5a6d7d !important;
  opacity: 1;
}

.site-hero .box-widget input[type="file"].form-control,
.site-hero .box-widget input.upload,
.site-hero .box-widget .upload {
  color: #1a2d3d !important;
}

.site-hero .box-widget .input-group-text {
  color: #0d2137 !important;
  background-color: #e9ecef;
  border-color: rgba(13, 33, 55, 0.12);
}

.site-hero .box-widget .tab-pane {
  color: #1a2d3d !important;
}

.site-hero .box-widget small,
.site-hero .box-widget .text-muted {
  color: #5a6d7d !important;
}

.generator-divider {
  width: 100%;
  height: 1px;
  margin: 1.25rem 0 0.5rem;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(74, 159, 212, 0.35), transparent);
}

.generator-appearance__title {
  font-size: 0.95rem;
  color: #0d2137 !important;
  letter-spacing: -0.01em;
}

.site-hero .box-widget .generator-appearance-toggle {
  font-weight: 600;
  border-width: 2px;
}

.btn-with-icon {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: 0.5rem;
}

.btn-with-icon .fa {
  flex-shrink: 0;
}

.btn-with-icon .appearance-chevron {
  font-size: 0.78em;
  opacity: 0.85;
  margin-right: 0.1rem;
}

.site-hero .box-widget .btn-outline-primary .fa {
  color: inherit;
}

/* Main CTA: ~1.5× default button height */
#submitButton {
  min-height: 3.75rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  font-size: 1.0625rem;
}

#submitButton .fa {
  font-size: 1.2em;
}

.color-field__label {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: #0d2137;
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}

.color-field__hint {
  display: block;
  font-size: 0.8125rem;
  color: #5a6d7d;
  line-height: 1.45;
  margin-bottom: 0.65rem;
}

.color-field__row {
  gap: 0.65rem;
  row-gap: 0.5rem;
}

input[type="color"].color-native {
  flex-shrink: 0;
  width: 4.25rem;
  height: 3rem;
  padding: 0.2rem;
  border: 2px solid rgba(13, 33, 55, 0.14);
  border-radius: var(--radius);
  cursor: pointer;
  background: #fff;
  box-shadow: 0 2px 8px rgba(10, 28, 48, 0.08);
}

input[type="color"].color-native::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"].color-native::-webkit-color-swatch {
  border: none;
  border-radius: calc(var(--radius) - 4px);
}

input[type="color"].color-native::-moz-color-swatch {
  border: none;
  border-radius: calc(var(--radius) - 4px);
}

.site-hero .box-widget .color-field__readout {
  color: #3d5266 !important;
  background: rgba(13, 33, 55, 0.06);
  padding: 0.35rem 0.5rem;
  border-radius: 0.35rem;
  word-break: break-all;
}

.box-widget--form .btn {
  margin-top: 0.8rem;
}

.box-widget h3 {
  font-weight: 700;
}

.box-widget hr {
  width: 12rem;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  height: 2px;
  border: 0;
  opacity: 0.6;
}

.form-control {
  border-radius: var(--radius);
  border: 1px solid rgba(13, 33, 55, 0.08);
  background-color: var(--color-ice);
  height: 3rem;
}

.form-control:focus {
  border-color: var(--color-accent);
  background-color: var(--color-white);
  box-shadow: 0 0 0 0.2rem rgba(74, 159, 212, 0.22);
}

.btn:focus,
.btn:active:focus,
.btn.active:focus {
  outline: 0 none;
}

.btn {
  border-radius: var(--radius);
  border: 0;
  font-weight: 600;
}

.btn-primary {
  background: var(--gradient-btn);
  box-shadow: 0 0.35rem 1.25rem rgba(30, 77, 114, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #5eb0e8 0%, #245a82 100%);
  box-shadow: 0 0.5rem 1.75rem rgba(30, 77, 114, 0.55);
  transform: translateY(-1px);
}

.btn-primary:focus,
.btn-primary:active,
.btn-primary:not(:disabled):not(.disabled):active:focus {
  background: var(--gradient-btn);
  box-shadow: 0 0 0 0.2rem rgba(74, 159, 212, 0.35);
}

.btn-lg {
  padding: 0.5rem 2rem;
}

.text-primary {
  color: var(--primary-color) !important;
}

.navbar-light .navbar-nav .nav-link.btn-nav {
  background: var(--gradient-btn);
  color: #fff;
  padding: 0.5rem 1rem;
}

.result-item {
  background-color: var(--color-ice);
  padding: 0.5rem;
  border-radius: 5rem;
  margin-bottom: 0.8rem;
}

.result-item p {
  text-align: left;
  padding-top: 4px;
  margin: 0;
  padding-left: 10px;
}

.result-item .btn {
  text-align: right;
}

.bg-art {
  position: absolute;
  z-index: 1;
  opacity: 0.22;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.bg-art img {
  width: min(52vw, 520px);
  filter: brightness(1.15) saturate(0.85);
}

.seo-section--light {
  background: var(--color-white);
}

.seo-section--muted {
  background: linear-gradient(180deg, #eef4fb 0%, #f7fafd 100%);
}

.seo-deep-content__gradient {
  background: linear-gradient(180deg, #081525 0%, #0d2137 28%, #132f4c 70%, #0a1628 100%);
  padding: 1px 0;
}

.seo-article {
  border-radius: var(--radius-lg) !important;
  overflow: hidden;
}

.seo-article__title {
  font-weight: 700;
  color: var(--color-bg-deep);
  letter-spacing: -0.02em;
}

.seo-article__text {
  color: #2c3e50;
  line-height: 1.75;
  font-size: 1.02rem;
}

.seo-faq {
  background: var(--color-white);
  border-top: 1px solid rgba(13, 33, 55, 0.06);
}

.seo-faq__title {
  color: var(--color-bg-deep);
  letter-spacing: -0.02em;
}

.seo-faq__intro {
  max-width: 42rem;
  margin-bottom: 1.75rem;
  line-height: 1.65;
}

.seo-faq__item {
  border-radius: var(--radius) !important;
  border: 1px solid rgba(13, 33, 55, 0.06) !important;
}

.seo-faq__q {
  color: var(--color-bg-deep);
  font-weight: 600;
}

.seo-faq__a {
  color: #3d5266;
  line-height: 1.65;
}

.section {
  padding: 5rem 0;
}

.img-res {
  width: 100%;
}

.hr {
  width: 5rem;
  background: var(--secondary-color);
  height: 0.2rem;
  margin-bottom: 1rem;
  margin-top: 1rem;
}

#loader {
  display: none;
}

#loader svg {
  width: 120px;
}

#loader svg circle,
#loader svg g rect {
  stroke: var(--color-accent-bright);
}

#loader svg g rect {
  fill: var(--color-accent-bright);
}

.disabled {
  pointer-events: none;
  opacity: 0.5;
  box-shadow: none;
  background-color: transparent !important;
  color: rgb(160, 170, 180) !important;
  border: 1px solid rgba(13, 33, 55, 0.15) !important;
}

.no-rad {
  border-radius: var(--radius);
}

.logo-preview__img {
  margin-right: 10px;
  cursor: pointer;
}

.logo-preview__img.selected {
  box-shadow: 0px 10px 24px rgba(30, 77, 114, 0.35);
  -webkit-box-shadow: 0px 10px 24px rgba(30, 77, 114, 0.35);
  -moz-box-shadow: 0px 10px 24px rgba(30, 77, 114, 0.35);
  border-radius: 50%;
  border: 2px solid var(--color-accent-bright);
  transform: scale(1.08);
}

.logo-upload-heading {
  color: #0d2137;
  font-size: 0.95rem;
}

.logo-file-upload {
  position: relative;
}

.logo-file-upload__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.logo-file-upload__zone {
  display: block;
  cursor: pointer;
  border: 1px dashed rgba(13, 33, 55, 0.22);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(248, 251, 255, 0.95) 0%, rgba(255, 255, 255, 0.98) 100%);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.logo-file-upload__zone:hover {
  border-color: rgba(30, 136, 229, 0.45);
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 0.35rem 1rem rgba(12, 40, 66, 0.08);
}

.logo-file-upload:focus-within .logo-file-upload__zone {
  border-color: var(--color-accent-bright);
  box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.22);
}

.logo-file-upload__zone.is-dragover {
  border-color: var(--color-accent-bright);
  border-style: solid;
  background: rgba(230, 244, 255, 0.65);
  box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
}

.logo-file-upload__zone.has-file {
  border-style: solid;
  border-color: rgba(30, 136, 229, 0.35);
}

.logo-file-upload__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem 1rem 1.1rem;
  gap: 0.35rem;
}

.logo-file-upload__icon {
  font-size: 1.65rem;
  color: var(--color-accent-bright);
  line-height: 1;
}

.logo-file-upload__cta {
  font-weight: 600;
  font-size: 0.9rem;
  color: #0d2137;
}

.site-hero .box-widget .logo-file-upload__hint {
  color: #5a6d7d !important;
  margin: 0;
}

.logo-file-upload__filename {
  display: block;
  max-width: 100%;
  font-size: 0.8rem;
  font-weight: 500;
  color: #1a2d3d;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-top: 0.15rem;
}

.logo-file-upload__zone:not(.has-file) .logo-file-upload__filename:empty {
  display: none;
}

.qr-result svg {
  width: 100%;
  height: 300px;
}

.msg {
  background: #fff;
  color: #444;
  font-weight: 600;
  font-size: small;
  padding: 12px;
  padding-left: 16px;
  border-top: solid 3px #ccc;
  border-radius: var(--radius);
  margin-bottom: 10px;
  box-shadow: 0 10px 10px -5px rgba(0, 0, 0, 0.06);
}

.msg-danger {
  border-color: #c94a4a;
  color: #a83838;
}

.msg-primary {
  border-color: var(--color-accent);
}

.sticky {
  position: sticky;
  position: -webkit-sticky;
}

.sticky-preview {
  top: 5rem;
}

#pointer {
  position: absolute;
  pointer-events: none;
  border: 1px solid var(--color-accent);
  height: 30px;
  width: 30px;
  border-radius: 50%;
  transition: all 0.2s cubic-bezier(0.23, 1, 0.32, 1);
  z-index: 11111;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
}

#pointer div {
  background-color: var(--color-accent);
  height: 10px;
  width: 10px;
  border-radius: 50%;
}

@media only screen and (max-width: 600px) {
  .form-control {
    margin-bottom: 1rem;
  }

  .result-item p {
    padding-top: 0;
    text-align: center;
    padding-left: 0;
  }

  .result-item .btn {
    display: none;
    text-align: right;
    font-size: 0.5rem;
  }

  .site-hero {
    min-height: auto;
    padding-top: 2rem;
    padding-bottom: 2.5rem;
  }

  .sticky-preview {
    position: relative;
    top: auto;
  }
}