/*
 * =============================================
 * --- 1. Root and Variable Definitions ---
 * =============================================
 */

:root {
    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --font-emoji: "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;

    /* Layout */
    --width-content: 710px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);

    /* Light Theme Palette based on Slate/Indigo */
    --c-text: #334155;
    /* Slate 700 */
    --c-text-light: #64748b;
    /* Slate 500 */
    --c-bg: #f8fafc;
    /* Slate 50 */
    --c-surface: #ffffff;
    --c-primary: #4f46e5;
    /* Indigo 600 */
    --c-primary-hover: #4338ca;
    /* Indigo 700 */
    --c-border: #cbd5e1;
    /* Slate 300 */
    --c-input-bg: #ffffff;
    --c-button-bg: #ffffff;
    --c-button-text: #334155;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark Theme Palette */
        --c-text: #e2e8f0;
        /* Slate 200 */
        --c-text-light: #94a3b8;
        /* Slate 400 */
        --c-bg: #0f172a;
        /* Slate 900 */
        --c-surface: #1e293b;
        /* Slate 800 */
        --c-primary: #818cf8;
        /* Indigo 400 */
        --c-primary-hover: #6366f1;
        /* Indigo 500 */
        --c-border: #334155;
        /* Slate 700 */
        --c-input-bg: #1e293b;
        --c-button-bg: #1e293b;
        --c-button-text: #f1f5f9;
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    }
}

/*
 * =============================================
 * --- 2. Global Resets and Base Styles ---
 * =============================================
 */

*, ::before, ::after {
    box-sizing: border-box;
}

body {
    max-width: var(--width-content);
    margin: var(--space-8) auto var(--space-4) auto;
    padding: 0 var(--space-4);
    font: 18px/1.6 var(--font-sans), var(--font-emoji);
    color: var(--c-text);
    background-color: var(--c-bg);
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--c-primary);
    color: var(--c-bg);
    padding: var(--space-2) var(--space-4);
    z-index: 100;
    text-decoration: none;
    border-bottom: none;
    border-radius: 0 0 var(--radius-sm) 0;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 0;
    color: var(--c-bg);
    outline: none;
}

/*
 * =============================================
 * --- 3. Typography ---
 * =============================================
 */

h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.3;
    color: var(--c-text);
    margin-top: 1em;
    margin-bottom: 0.5em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; margin-top: 1.75em; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

a:link {
    color: var(--c-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

a:hover {
    color: var(--c-primary-hover);
    border-bottom-color: var(--c-primary-hover);
}

a:focus-visible {
    outline: 2px solid var(--c-primary);
    outline-offset: 2px;
    border-bottom-color: var(--c-primary);
}

a:visited {
    color: color-mix(in srgb, var(--c-primary) 70%, var(--c-text-light));
}

a:visited:hover {
    color: var(--c-primary-hover);
}


code,
pre,
table {
    overflow-x: auto;
}

code,
pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

:not(pre)>code {
    background-color: var(--c-surface);
    border: 1px solid var(--c-border);
    padding: 0.1rem 0.3rem;
    border-radius: var(--radius-sm);
    color: var(--c-primary);
}

pre {
    padding: var(--space-4);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);

    /* FIX: Prevents font size inflation in code blocks on iOS (Chrome & Safari). */
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}


/*
 * =============================================
 * --- 4. Forms, Buttons & Inputs ---
 * =============================================
 */

[type='text'],
[type='email'],
[type='url'],
[type='password'],
[type='number'],
[type='date'],
[type='datetime-local'],
[type='month'],
[type='search'],
[type='tel'],
[type='time'],
[type='week'],
[multiple],
textarea,
select {
    font-family: inherit;
    font-size: 1rem;
    font-weight: inherit;
    line-height: inherit;
    color: inherit;
    width: 100%;
    margin: var(--space-2) 0;
    padding: var(--space-2) var(--space-3);
    background-color: var(--c-input-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
}

[type='text']:focus,
[type='email']:focus,
[type='url']:focus,
[type='password']:focus,
[type='number']:focus,
[type='date']:focus,
[type='datetime-local']:focus,
[type='month']:focus,
[type='search']:focus,
[type='tel']:focus,
[type='time']:focus,
[type='week']:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-primary) 30%, transparent);
}

label {
    margin: var(--space-2) 0;
    display: block;
    font-weight: 500;
}

button,
a.button {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    text-decoration: none;
    cursor: pointer;
    border-radius: var(--radius-md);
    background: var(--c-button-bg);
    color: var(--c-button-text);
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

button:hover,
a.button:hover {
    border-color: var(--c-primary);
    color: var(--c-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

button:focus-visible,
a.button:focus-visible {
    outline: 2px solid var(--c-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/*
 * =============================================
 * --- 5. Navigation (Mobile-First) ---
 * =============================================
 */

/* Default mobile hamburger menu */
.nav-menu-desktop {
    display: none;
}

details.nav-menu {
    position: relative;
    display: inline-block;
}

details.nav-menu>summary {
    display: inline-block;
    position: relative;
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
}

details.nav-menu>summary:hover {
    background-color: var(--c-surface);
}

details.nav-menu>summary::-webkit-details-marker {
    display: none;
}

details .nav-menu-inner {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    z-index: 1000;
    margin-top: var(--space-1);
    padding: var(--space-2);
    border: 1px solid var(--c-border);
    background-color: var(--c-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* Desktop navigation for screens wider than 600px */
@media only screen and (min-width: 601px) {

    /* Stronger selector to override inline-block */
    /* details.nav-menu vs .nav-menu */
    details.nav-menu {
        display: none;
    }

    .nav-menu-desktop {
        display: block;
    }
}

.nav-menu-desktop>ul {
    list-style-type: none;
    padding: 0;
    margin: 0 0 var(--space-8) 0;
    display: flex;
    justify-content: flex-start;
    gap: var(--space-6);
    align-items: center;
    border-bottom: 1px solid var(--c-border);
    padding-bottom: var(--space-4);
    margin: 0 0 var(--space-6) 0;
}

.nav-menu-desktop a {
    white-space: nowrap;
}

.nav-menu-desktop>ul>a.button {
    margin-left: auto;
}


/*
 * =============================================
 * --- 6. Tables, Components & Library Overrides ---
 * =============================================
 */

table {
    border-collapse: collapse;
    width: 100%;
    margin: var(--space-4) 0;
}

th,
td {
    text-align: left;
    border: 1px solid var(--c-border);
    overflow-wrap: anywhere;
    padding: var(--space-2) var(--space-3);
}

th {
    background-color: var(--c-surface);
    font-weight: 600;
}

.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: var(--space-4) 0;
}

.table-wrapper table {
    margin: 0;
}

.cta-block {
    padding: var(--space-6);
    border: 1px solid var(--c-border);
    background-color: var(--c-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin: var(--space-6) 0;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin: var(--space-4) 0;
}

@media only screen and (max-width: 600px) {
    .card-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    display: flex;
    flex-direction: column;
    padding: var(--space-6);
    border: 1px solid var(--c-border);
    background-color: var(--c-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.card h3 {
    margin-top: 0;
}

.card .button {
    margin-top: auto;
    align-self: flex-start;
}

.explainer-wrap {
    position: relative;
    margin: var(--space-4) 0;
}

video.explainer {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

/* Centered play control shown until the visitor starts the video. */
.explainer-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--c-primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.explainer-play svg {
    width: 32px;
    height: 32px;
    margin-left: 3px;
}

.explainer-play:hover {
    background: var(--c-primary-hover);
    color: #ffffff;
    border: 0;
    transform: translate(-50%, -50%) scale(1.06);
    box-shadow: var(--shadow-md);
}

.explainer-wrap.playing .explainer-play,
.explainer-wrap.ended .explainer-play {
    display: none;
}

/* Stepper-style numbering, e.g. the how-it-works lists. */
.steps ol {
    list-style: none;
    counter-reset: step;
    padding-left: 0;
    margin: var(--space-6) 0;
}

.steps li {
    counter-increment: step;
    position: relative;
    padding-left: 52px;
    padding-bottom: var(--space-6);
}

.steps li:last-child {
    padding-bottom: 0;
}

.steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: -3px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--c-primary);
    color: var(--c-bg);
    font-weight: 700;
    font-size: 1rem;
}

.steps li::after {
    content: '';
    position: absolute;
    left: 16px;
    top: 37px;
    bottom: 3px;
    width: 2px;
    background: var(--c-border);
}

.steps li:last-child::after {
    display: none;
}

/* End-of-video state: scrim over the final frame with a real CTA. */
.explainer-endcap {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    background: rgba(15, 23, 42, 0.45);
    border-radius: var(--radius-md);
}

.explainer-wrap.ended .explainer-endcap {
    display: flex;
}

.explainer-replay {
    border: 0;
    background: none;
    box-shadow: none;
    padding: 0;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
    font-size: 1rem;
    cursor: pointer;
}

.explainer-replay:hover {
    color: #ffffff;
    background: none;
    border: 0;
    transform: none;
    box-shadow: none;
}

/* Specific overrides for the intl-tel-input library */
div.iti.iti--allow-dropdown.iti--show-flags {
    margin: var(--space-2) 0;
    width: 100%;
}

.iti__selected-country {
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

#iti-0__country-listbox,
.iti__dropdown-content {
    background: var(--c-surface);
    border-color: var(--c-border);
}

.iti__search-input {
    margin: 1px;
    background-color: var(--c-input-bg);
    color: var(--c-text);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    padding: var(--space-2);
}

.iti__selected-dial-code {
    font-size: 1rem;
    font-family: var(--font-sans), var(--font-emoji);
}

.iti__country-list {
    font-size: 1rem;
    font-family: var(--font-sans), var(--font-emoji);
}


/*
 * =============================================
 * --- 7. Utility & Helper Classes ---
 * =============================================
 */

.nav-menu-inner a {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-2);
}

.nav-menu-inner>ul {
    list-style: none;
    padding-inline-start: 0;
}

li a,
.link-list>li {
    margin-bottom: var(--space-2);
}

.link-list {
    columns: 2;
}

.hidden {
    display: none;
}

.below-recaptcha {
    margin-top: var(--space-3);
}

.mr-4 {
    margin-right: var(--space-4);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.balance {
    text-wrap: balance;
}

#TableOfContents li {
    margin-bottom: var(--space-2);
}

.footer {
    padding-top: var(--space-1);
    border-top: 1px solid var(--c-border);
    margin-top: var(--space-6);
    padding-bottom: var(--space-4);
    color: var(--c-text-light);
    font-size: 0.9em;
}

.wrap {
    padding: 0;
    /* Layout handled by body max-width and padding */
}

.mt-8 {
    margin-top: var(--space-8);
}

.block {
    display: block;
}