/* ===================================================================
   GOOGLE FONTS
   =================================================================== */
@import url("https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&display=swap");

/* ===================================================================
   ROOT STYLES & VARIABLES
   =================================================================== */
/* ===== Root styles ===== */
:root {
  interpolate-size: allow-keywords;
  color-scheme: light;

  --color-primary-50: #fff7ed;
  --color-primary-100: #ffedd5;
  --color-primary-200: #fed7aa;
  --color-primary-300: #fdba74;
  --color-primary-400: #fb923c;
  --color-primary-500: #f97316;
  --color-primary-600: #ea580c;
  --color-primary-700: #c2410c;
  --color-primary-800: #9a3412;
  --color-primary-900: #7c2d12;
  --color-primary-950: #431407;
  --color-primary-gradient: linear-gradient(to bottom right, var(--color-primary-200), var(--color-primary-400), var(--color-primary-600), var(--color-primary-800));

  --color-neutral-0: #ffffff;
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f4f4f5;
  --color-neutral-200: #e4e4e7;
  --color-neutral-300: #d4d4d8;
  --color-neutral-400: #a1a1aa;
  --color-neutral-500: #71717a;
  --color-neutral-600: #52525b;
  --color-neutral-700: #3f3f46;
  --color-neutral-800: #27272a;
  --color-neutral-900: #18181b;
  --color-neutral-950: #09090b;
  --color-neutral-1000: #000000;

  --color-status-red: #EF4444;
  --color-status-green: #22C55E;
  --color-status-orange: #f97316;
  --color-status-neutral: #a1a1aa;

  --size-2: 0.125rem; /* 0.5 */
  --size-4: 0.25rem; /* 1 */
  --size-8: 0.5rem; /* 2 */
  --size-10: 0.625rem; /* 2.5 */
  --size-12: 0.75rem; /* 3 */
  --size-14: 0.875rem; /* 3.5 */
  --size-16: 1rem;    /* 16px */
  --size-20: 1.25rem; /* 20px */
  --size-24: 1.5rem;  /* 24px */
  --size-36: 2.25rem; /* 36px */
  --size-40: 2.5rem;  /* 40px */
  --size-48: 3rem;    /* 48px */
  --size-64: 4rem;    /* 64px */
  --size-96: 6rem;    /* 96px */

  --border-width: 0.075rem;
  --border-radius-1: 2.25rem;
  --border-radius-2: 1.5rem;
  --border-radius-3: 0.75rem;
  --border-radius-round: 999px;

  --shadow-1: 0 8px 32px rgba(0, 0, 0, 0.2);

  /* Semantic theme tokens — light defaults */
  --theme-logo:               var(--color-neutral-300);
  --theme-container-0:        var(--color-neutral-100);
  --theme-container-1:        linear-gradient(var(--color-neutral-50), var(--color-neutral-0));
  --theme-container-2:        linear-gradient(to bottom, var(--color-neutral-0) 50%, var(--color-neutral-100) 100%);
  --theme-container-3:        linear-gradient(to bottom, var(--color-neutral-0) 60%, var(--color-neutral-50) 100%);
  --theme-container-4:        var(--color-neutral-50);
  --theme-container-border:   linear-gradient(to bottom, var(--color-neutral-300), var(--color-neutral-200));
  --theme-container-4-border: var(--color-neutral-200);
  --theme-text:               var(--color-neutral-600);
  --theme-text-faded:         var(--color-neutral-400);
}

/* ===== Keyboard focus - all focusable elements ===== */
:focus-visible {
  outline: var(--size-2) solid var(--color-primary-400);
  outline-offset: var(--size-2);
  border-radius: var(--border-radius-3);
}


/* ===================================================================
   BODY STYLES
   =================================================================== */
* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  color: var(--theme-text);
  background: var(--theme-container-0);
  font-family: Montserrat, Arial, sans-serif;
  font-weight: 400;
  font-size: var(--size-16);
  line-height: 1.5;
  transition: background-color 0.2s ease, color 0.2s ease;
}

body {
  display: flex;
  justify-content: center;
  min-width: 20rem;
  min-height: 100dvh;
  padding: var(--size-24);
}

button,
input,
select {
  font: inherit;
}

/* ===================================================================
   FOOTER
   =================================================================== */
main > footer {
  flex-wrap: wrap;
  gap: var(--size-8) var(--size-16);
  padding: var(--size-2) var(--size-12);
  font-size: var(--size-14);
  font-weight: 300;
  color: var(--theme-text-faded);
}

main > footer p {
  margin: 0;
  text-align: right;
}

/* ===================================================================
   NAV
   =================================================================== */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0;
  padding-inline-start: var(--size-4);
}

nav > svg {
  color: var(--theme-logo);
  transition: color 0.1s;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--size-12);
  color: var(--theme-text-faded);
  font-size: var(--size-14);
  font-weight: 400;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}

.nav-link:hover { color: var(--color-primary-500); }

.nav-link[aria-current="page"] {
  color: var(--color-primary-500);
  cursor: default;
  pointer-events: none;
}

/* ===================================================================
   CONTAINERS
   =================================================================== */
/* ===== Base containers ===== */
.container-1 {
  display: flex;
  flex-direction: column;
  width: min(100%, 1080px);
  height: fit-content;
  padding: var(--size-24) var(--size-24);
  gap: var(--size-24);
  border: var(--border-width) solid transparent;
  border-radius: var(--border-radius-1);
  background:
    var(--theme-container-1) padding-box,
    var(--theme-container-border) border-box;
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.container-2 {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: var(--size-24);
  border: var(--border-width) solid transparent;
  border-radius: var(--border-radius-2);
  background:
    var(--theme-container-2) padding-box,
    var(--theme-container-border) border-box;
  overflow: hidden;
}

.container-3 {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: var(--size-12) var(--size-24);
  border: var(--border-width) solid transparent;
  border-radius: var(--border-radius-3);
  background:
    var(--theme-container-3) padding-box,
    var(--theme-container-border) border-box;
  overflow: hidden;
}

/* ===== Pill container ===== */
.container-pill {
  width: fit-content;
  margin: 0;
  padding: var(--size-4) var(--size-8);
  border-radius: var(--border-radius-round);
  color: var(--theme-container-4);
  background-color: var(--color-primary-500);
  font-size: var(--size-10);
  font-weight: 700;
  letter-spacing: 0.05rem;
}

/* ===== Two Column container grid ===== */
.container-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: var(--size-24);
}

/* ===== Three Column container grid ===== */
.container-grid-3 {
  display: grid;
  grid-template-columns: minmax(12rem, 0.4fr) minmax(0, 1fr) auto;
  align-items: start;
  gap: var(--size-24);
}

/* ===== Row/column containers ===== */
.container-row {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.container-row-center {
  align-items: center;
}

.container-column {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
}

/* ===== Gap container ===== */
.container-gap {
  gap: var(--size-24);
}

.container-gap-sm {
  gap: var(--size-12);
}

/* ===== Isolated container - used for background images ===== */
.container-isolate {
  position: relative;
  isolation: isolate;
}


/* ===================================================================
   TEXT STYLES
   =================================================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin-block-start: 0;
  margin-block-end: 0;
  font-weight: 700;
  line-height: 1.2;
}

h1, h2, h3 { text-wrap: balance; }

p {
  margin-block-start: 0;
}

p:last-child { margin-block-end: 0; }

/* ===== Headings ===== */
/* Primary colors */
h1 {
  margin-block-end: var(--size-4);
  max-width: 12ch;
  font-family: Montserrat, "Arial Black", Arial, sans-serif;
  font-size: var(--size-96);
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--color-primary-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

h2 {
  margin: calc(var(--size-8) * -1) 0 var(--size-8);
  font-size: var(--size-16);
  color: var(--color-primary-400);
}

h3 {
  margin-block-end: var(--size-4);
  font-size: var(--size-12);
  color: var(--color-primary-400);
}

/* Neutral colors */
h4 {
  margin-block-end: var(--size-4);
  font-size: var(--size-16);
  font-weight: 400;
  color: var(--theme-text-faded);
}

/* ===== Anchor links ===== */
a {
  color: var(--color-primary-400);
  text-decoration: none;
  text-underline-offset: 0.2em;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-primary-500);
  text-decoration: underline;
}

/* ===== Overline ===== */
.overline {
  margin: 0 0 calc(var(--size-4) * -1);
  font-family: Montserrat, "Arial Black", Arial, sans-serif;
  font-size: var(--size-12);
  font-weight: 800;
  color: var(--color-primary-300);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ===== Label ===== */
.label,
label,
dt {
  margin: 0;
  font-size: var(--size-12);
  font-weight: 500;
  color: var(--theme-text-faded);
  text-transform: uppercase;
}

/* ===== Value ===== */
.value,
dd {
  margin: 0;
  font-size: var(--size-16);
  font-weight: 400;
  color: var(--theme-text);
  overflow-wrap: anywhere;
}

/* ===== Misc ===== */
.title-faq {
  margin-block-end: var(--size-12);
}

.body-empty-state {
  margin-block-end: calc(var(--size-8) * -1);
  font-size: var(--size-16);
  font-weight: 400;
  color: var(--theme-text-faded);
}


/* ===================================================================
   FORM CONTROLS
   =================================================================== */
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--size-4);
}

input,
select {
  width: 100%;
  padding: var(--size-8) var(--size-16);
  border: var(--border-width) solid var(--theme-container-4-border);
  border-radius: var(--border-radius-3);
  color: var(--theme-text);
  background-color: var(--theme-container-4);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

select {
  min-height: var(--size-24);
  appearance: none;
  padding-inline-end: calc(var(--size-24) + var(--size-16));
  color: var(--theme-text);
  background:
    url("./images/icons/chevron-down.svg") right var(--size-8) center / 1.5rem 1.5rem no-repeat,
    var(--theme-container-4);
}

input[aria-invalid="true"] {
  border-color: var(--color-status-red);
}

input::placeholder {
  color: var(--theme-text-faded);
}

/* ===================================================================
   ICONS
   =================================================================== */
/* ===== Hero section icon ===== */
.icon-stamp {
  position: absolute;
  top: 52px;
  left: 500px;
  z-index: -1;
  width: 12rem;
  height: auto;
  pointer-events: none;
}


/* ===================================================================
   BUTTONS AND STATUS
   =================================================================== */
/* ===== Base class ===== */
.button {
  padding: var(--size-8) var(--size-16);
  border: var(--border-width) solid var(--color-primary-500);
  border-radius: var(--border-radius-3);
  color: var(--theme-container-4);
  background: var(--color-primary-500);
  font-size: var(--size-16);
  font-weight: 700;
  letter-spacing: 0.05rem;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s, opacity 0.2s;
}

/* ===== Full width button ===== */
.button-block {
  width: 100%;
}

/* ===== Flat primary button ===== */
.button-flat-primary {
  border: var(--border-width) solid var(--color-primary-500);
  background-color: var(--color-primary-500);
  color: var(--theme-container-4);
}

.button-flat-primary:hover {
  border: var(--border-width) solid var(--color-primary-600);
  background-color: var(--color-primary-600);
  color: var(--theme-container-4);
}

/* ===== Outline primary button ===== */
.button-outline-primary {
  border: var(--border-width) solid var(--color-primary-500);
  background-color: transparent;
  color: var(--color-primary-500);
}

.button-outline-primary:hover {
  border: var(--border-width) solid var(--color-primary-600);
  background-color: transparent;
  color: var(--color-primary-600);
}

/* ===== Disabled button ===== */
.button:disabled {
  opacity: 0.5;
  cursor: progress;
}

/* ===================================================================
   TOGGLE SWITCH
   =================================================================== */
/* ===== Toggle switch ===== */
.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--size-12);
  cursor: pointer;
  user-select: none;
}

/* Hide the native input visually but keep it accessible */
.toggle-switch-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-switch-slider {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

/* Track */
.toggle-switch-track {
  display: inline-block;
  width: 2.25rem;      /* 36px */
  height: 1.25rem;     /* 20px */
  border-radius: var(--border-radius-round);
  background-color: var(--color-neutral-300);
  transition: background-color 0.2s ease;
  overflow: hidden;
}

/* Thumb */
.toggle-switch-thumb {
  position: absolute;
  inset-block-start: 0.125rem;   /* 2px */
  inset-inline-start: 0.125rem;  /* 2px */
  width: 1rem;     /* 16px */
  height: 1rem;    /* 16px */
  border-radius: var(--border-radius-round);
  background-color: var(--color-neutral-0);
  transition: transform 0.2s ease;
  z-index: 1;
}

/* Checked state — track changes color */
.toggle-switch-input:checked + .toggle-switch-slider .toggle-switch-track {
  background-color: var(--color-neutral-700);
}

/* Checked state — thumb slides to the right and changes color */
.toggle-switch-input:checked + .toggle-switch-slider .toggle-switch-thumb {
  transform: translateX(100%);
  background-color: var(--color-neutral-900);
}

/* Disabled state */
.toggle-switch-input:disabled + .toggle-switch-slider {
  opacity: 0.5;
  cursor: not-allowed;
}

.toggle-switch:has(.toggle-switch-input:disabled) {
  cursor: not-allowed;
}

/* Focus ring on keyboard navigation */
.toggle-switch-input:focus-visible + .toggle-switch-slider .toggle-switch-track {
  outline: var(--size-2) solid var(--color-primary-400);
  outline-offset: var(--size-2);
}


/* ===================================================================
   COLLAPSIBLE SECTIONS
   =================================================================== */
.collapsible {
  transition-behavior: allow-discrete;
}

.collapsible::details-content {
  block-size: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    block-size 400ms ease-in-out,
    content-visibility 400ms ease-in-out allow-discrete,
    opacity 400ms ease-in-out;
}

.collapsible[open]::details-content {
  block-size: auto;
  opacity: 1;
}

.collapsible-header {
  gap: var(--size-12);
  list-style: none;
  cursor: pointer;
}

/* Hides native details marker across browsers */
.collapsible-header::-webkit-details-marker {
  display: none;
}

.collapsible-toggle {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  margin-inline-start: auto;
  width: var(--size-24);
  height: var(--size-24);
  background: transparent;
}

.collapsible-toggle-icon {
  display: block;
  width: var(--size-24);
  height: var(--size-24);
  transition: transform 400ms ease-in-out;
  mask: url('./images/icons/plus.svg') center / contain no-repeat;
  -webkit-mask: url('./images/icons/plus.svg') center / contain no-repeat;
  background-color: var(--theme-text-faded);
}

.collapsible[open] .collapsible-toggle-icon {
  transform: rotate(45deg);
}


/* ===================================================================
   TOAST NOTIFICATION MESSAGE STYLES
   =================================================================== */

/* ===== Status messages ===== */
.message {
  display: block;
  position: fixed;
  top: var(--size-24);
  left: var(--size-24);
  width: 320px;
  padding: var(--size-16) var(--size-20);
  border-radius: var(--border-radius-2);
  font-family: Arial, sans-serif;
  font-size: var(--size-16);
  font-weight: 400;
  color: var(--theme-container-4);
  background-color: var(--color-status-neutral);
  border: var(--border-width) solid var(--color-status-neutral);
  line-height: 1.4;
  letter-spacing: 0.03rem;
  white-space: pre-line;
  box-shadow: var(--shadow-1);
  z-index: 999;
  pointer-events: none;
}

.message.loading {
  background-color: var(--color-status-neutral);
  border: var(--border-width) solid var(--color-status-neutral);
}

.message.success {
  background-color: var(--color-status-green);
  border: var(--border-width) solid var(--color-status-green);
  pointer-events: auto;
}

.message.error {
  background-color: var(--color-status-red);
  border: var(--border-width) solid var(--color-status-red);
  pointer-events: auto;
}


/* ===================================================================
   RESULT AND FAQ CARDS
   =================================================================== */
   .result-detail-grid {
    width: 100%;
  }
  
  .result-list {
    display: grid;
    gap: 0;
    margin: 0;
  }
  
  
  .result-list > div {
    display: grid;
    gap: var(--size-4);
    padding-block: var(--size-12);
  }
  
  .result-list-row-header {
    gap: var(--size-12);
  }
  
  /* ===== Unordered list - used for FAQ lists ===== */
  ul {
    margin-block-start: -0.875em;
  }


/* ===================================================================
   STAMP MEDIA PREVIEW
   =================================================================== */
   .media-preview {
    display: grid;
    margin: 0;
    min-height: 12rem;
    padding: 0;
  }
  
  .media-frame {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    min-height: 12rem;
    overflow: hidden;
    background: var(--theme-container-0);
  }
  
  .media-frame img,
  .media-frame iframe {
    display: block;
    width: 100%;
    border: 0;
  }
  
  .media-frame img {
    image-rendering: pixelated;
    object-fit: contain;
  }
  
  .media-frame iframe {
    min-height: 100%;
    aspect-ratio: 1 / 1;
  }
  
  .media-text {
    width: 100%;
    max-height: 24rem;
    padding: var(--size-16);
    overflow: auto;
    margin: 0;
    color: var(--theme-text);
    white-space: pre-wrap;
  }


/* ===================================================================
   TRANSACTION FLOW CHART SECTION
   =================================================================== */
.transaction-flow-chart {
  display: block;
}

.transaction-flow-diagram {
  display: block;
  padding: var(--size-12) var(--size-4);
  overflow-x: hidden;
}

.transaction-flow-svg {
  display: block;
  width: 100%;
  height: auto;
  background: transparent;
}

.transaction-flow-counts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--size-24);
  margin: var(--size-4) 0 0;
}

.transaction-flow-counts div {
  display: grid;
  gap: var(--size-4);
}

.transaction-flow-counts div:last-child {
  text-align: right;
}

  
/* ===================================================================
   THEME OVERRIDES
   =================================================================== */

/* Dark — system preference */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --theme-logo:               var(--color-neutral-700);
    --theme-container-0:        var(--color-neutral-800);
    --theme-container-1:        linear-gradient(var(--color-neutral-950), var(--color-neutral-1000));
    --theme-container-2:        linear-gradient(to bottom, var(--color-neutral-1000) 50%, var(--color-neutral-900) 100%);
    --theme-container-3:        linear-gradient(to bottom, var(--color-neutral-1000) 60%, var(--color-neutral-950) 100%);
    --theme-container-4:        var(--color-neutral-950);
    --theme-container-border:   linear-gradient(to bottom, var(--color-neutral-700), var(--color-neutral-800));
    --theme-container-4-border: var(--color-neutral-800);
    --theme-text:               var(--color-neutral-300);
    --theme-text-faded:         var(--color-neutral-500);
  }
}

/* Dark — manual override */
[data-theme="dark"] {
  color-scheme: dark;
  --theme-logo:               var(--color-neutral-700);
  --theme-container-0:        var(--color-neutral-800);
  --theme-container-1:        linear-gradient(var(--color-neutral-950), var(--color-neutral-1000));
  --theme-container-2:        linear-gradient(to bottom, var(--color-neutral-1000) 50%, var(--color-neutral-900) 100%);
  --theme-container-3:        linear-gradient(to bottom, var(--color-neutral-1000) 60%, var(--color-neutral-950) 100%);
  --theme-container-4:        var(--color-neutral-950);
  --theme-container-border:   linear-gradient(to bottom, var(--color-neutral-700), var(--color-neutral-800));
  --theme-container-4-border: var(--color-neutral-700);
  --theme-text:               var(--color-neutral-300);
  --theme-text-faded:         var(--color-neutral-500);
}

/* Light — manual override (restores light when OS is dark) */
[data-theme="light"] {
  color-scheme: light;
  --theme-logo:               var(--color-neutral-300);
  --theme-container-0:        var(--color-neutral-100);
  --theme-container-1:        linear-gradient(var(--color-neutral-50), var(--color-neutral-0));
  --theme-container-2:        linear-gradient(to bottom, var(--color-neutral-0) 50%, var(--color-neutral-100) 100%);
  --theme-container-3:        linear-gradient(to bottom, var(--color-neutral-0) 60%, var(--color-neutral-50) 100%);
  --theme-container-4:        var(--color-neutral-50);
  --theme-container-border:   linear-gradient(to bottom, var(--color-neutral-300), var(--color-neutral-200));
  --theme-container-4-border: var(--color-neutral-200);
  --theme-text:               var(--color-neutral-600);
  --theme-text-faded:         var(--color-neutral-400);
}

/* ===================================================================
   RESPONSIVE LAYOUT
   =================================================================== */
@media (max-width: 768px) {
  .container-1 {
    padding-block: var(--size-48);
  }

  h1 {
    font-size: var(--size-64);
  }

  h2 {
    font-size: var(--size-24);
  }

  .container-grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .container-grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }

  .container-grid-2 > :first-child {
    order: 2;
  }

  .container-grid-2 > :last-child {
    order: 1;
  }

  .primary-button {
    margin-block-start: var(--size-24);
  }

  .icon-stamp {
    top: 47px;
    left: 350px;
    width: 8rem;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: var(--size-48);
  }

  h2 {
    font-size: var(--size-16);
  }

  .overline {
    margin: 0 0 calc(var(--size-4) * -1);
    font-size: var(--size-8);
  }

  .icon-stamp {
    top: 36px;
    left: 204px;
    width: 4rem;
  }
}

@media (max-width: 400px) {
  h1 {
    font-size: var(--size-40);
  }

  h2 {
    font-size: var(--size-16);
  }

  .overline {
    margin: 0 0 calc(var(--size-2) * -1);
    font-size: var(--size-8);
  }

  .icon-stamp {
    display: none;
  }
}