/* ============================================================================
   RIKA AUTH — login screen  (prefix: .rka-*)
   ----------------------------------------------------------------------------
   Split shell: full-bleed animated SVG canvas (left) + form panel (right).
   Loaded ONLY by Views/Shared/_Auth_Layout.cshtml, after app.min.css.

   RULES (same as rika-ui.css)
   - Every class is prefixed `rka-`. No bare Bootstrap class is restyled here,
     so this file cannot leak into the rest of the app.
   - All tokens live on `.rka-shell`; theme + language are attributes on that
     same element (data-rka-theme / data-rka-lang), not on <html>.
   - Colours are the Skote values already in bootstrap.min.css.
   ============================================================================ */

.rka-shell {
    /* brand */
    --rka-brand: #556ee6;
    --rka-brand-600: #4458c9;
    --rka-brand-050: #eef1fe;
    --rka-success: #34c38f;
    --rka-warning: #f1b44c;
    --rka-danger: #f46a6a;
    --rka-info: #50a5f1;
    /* surfaces — light */
    --rka-bg: #f4f6fb;
    --rka-panel: #ffffff;
    --rka-panel-2: #fbfcfe;
    --rka-ink: #2a3042;
    --rka-ink-2: #495057;
    --rka-muted: #74788d;
    --rka-line: #e6e9f2;
    --rka-field: #ffffff;
    --rka-field-line: #dde1ec;
    --rka-field-fill: #f7f8fc;
    /* shape */
    --rka-r-sm: 8px;
    --rka-r: 12px;
    --rka-r-lg: 18px;
    --rka-ring: 0 0 0 4px rgba(85,110,230,.16);
    --rka-shadow: 0 30px 70px -34px rgba(29,34,60,.45);
    --rka-ease: cubic-bezier(.4,0,.2,1);
}

/* Dark palette. The in-page toggle is currently hidden by request — to bring
   it back, restore the [data-rka-toggle-theme] button in the view and set
   data-rka-theme="dark" on .rka-shell. */
.rka-shell[data-rka-theme="dark"] {
    --rka-bg: #171b26;
    --rka-panel: #1c2030;
    --rka-panel-2: #222739;
    --rka-ink: #edf0f7;
    --rka-ink-2: #c6cbdb;
    --rka-muted: #949aad;
    --rka-line: #2c3245;
    --rka-field: #232838;
    --rka-field-line: #333a50;
    --rka-field-fill: #232838;
    --rka-brand-050: #232a45;
    --rka-shadow: 0 30px 70px -34px rgba(0,0,0,.8);
}

/* ── shell ───────────────────────────────────────────────────────────────── */

body.rka-body { margin: 0; padding: 0; background: #151935; }

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

.rka-shell {
    min-height: 100vh;
    min-height: 100dvh;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(430px, .92fr);
    background: var(--rka-bg);
    color: var(--rka-ink);
    font-size:calc(14px + var(--rk-type-bump));
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

.rka-shell a { color: var(--rka-brand); text-decoration: none; }
.rka-shell a:hover { color: var(--rka-brand-600); text-decoration: underline; }

/* language visibility */
.rka-shell[data-rka-lang="en"] .rka-th,
.rka-shell[data-rka-lang="th"] .rka-en { display: none; }

/* ── left: animated canvas ───────────────────────────────────────────────── */

.rka-visual {
    position: relative;
    overflow: hidden;
    background: #151935;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 42px 46px;
    color: #fff;
}

/* the artwork is the backdrop; brand + copy stack above it and above the
   ::after scrim. Kept at single-class specificity so the responsive rules
   below can still re-position them. */
.rka-visual__art { position: absolute; inset: 0; z-index: 0; }
.rka-brand,
.rka-visual__copy { position: relative; z-index: 2; }
.rka-visual__art svg { display: block; width: 100%; height: 100%; }

/* keeps the copy readable wherever the artwork crops */
.rka-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        linear-gradient(180deg, rgba(15,18,40,.72) 0%, rgba(15,18,40,0) 34%),
        linear-gradient(0deg,  rgba(15,18,40,.82) 0%, rgba(15,18,40,0) 40%);
}

.rka-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    letter-spacing: .04em;
    color: #fff;
}
.rka-brand:hover { color: #fff; text-decoration: none; }

.rka-brand__mark {
    width: 42px;
    height: 42px;
    border-radius: 13px;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--rka-brand) 0%, #7c8ef0 100%);
    box-shadow: 0 10px 26px -10px rgba(85,110,230,.9);
}
.rka-brand__mark img { width: 26px; height: 26px; object-fit: contain; }

.rka-brand__name { font-size:calc(19px + var(--rk-type-bump)); }
.rka-brand__sub {
    display: block;
    font-size:calc(11px + var(--rk-type-bump));
    font-weight: 500;
    letter-spacing: .12em;
    text-transform: uppercase;
    opacity: .62;
}

.rka-visual__copy { max-width: 460px; }

.rka-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 13px 5px 8px;
    border-radius: 999px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.16);
    font-size:calc(11.5px + var(--rk-type-bump));
    letter-spacing: .05em;
    text-transform: uppercase;
    margin-bottom: 18px;
}
.rka-eyebrow i {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--rka-success);
    box-shadow: 0 0 0 4px rgba(52,195,143,.22);
}

.rka-visual__copy h1 {
    margin: 0 0 12px;
    font-size:calc(34px + var(--rk-type-bump));
    line-height: 1.24;
    font-weight: 700;
    letter-spacing: -.01em;
    color: #fff;
}

.rka-visual__copy p {
    margin: 0;
    font-size:calc(14.5px + var(--rk-type-bump));
    opacity: .74;
    max-width: 40ch;
}

.rka-stats { display: flex; gap: 10px; margin-top: 26px; flex-wrap: wrap; }

.rka-stat {
    flex: 1 1 120px;
    padding: 13px 16px;
    border-radius: var(--rka-r);
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.13);
}
.rka-stat b { display: block; font-size:calc(20px + var(--rk-type-bump)); line-height: 1.2; }
.rka-stat span { font-size:calc(11.5px + var(--rk-type-bump)); opacity: .68; }

/* ── right: form panel ───────────────────────────────────────────────────── */

.rka-panel {
    position: relative;
    background: var(--rka-panel);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    max-height: 100vh;
    max-height: 100dvh;
}

.rka-panel__top {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 20px 44px 0;
    flex: 0 0 auto;
}

.rka-panel__body {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 26px 44px 34px;
}

.rka-form { width: 100%; max-width: 396px; margin: 0 auto; }
.rka-form--wide { max-width: 460px; }

.rka-head { margin-bottom: 26px; }
.rka-head h2 { margin: 0 0 6px; font-size:calc(25px + var(--rk-type-bump)); font-weight: 700; letter-spacing: -.01em; }
.rka-head p { margin: 0; color: var(--rka-muted); font-size:calc(13.5px + var(--rk-type-bump)); }

/* ── controls ────────────────────────────────────────────────────────────── */

.rka-field { margin-bottom: 16px; }

.rka-field__label {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 7px;
    font-size:calc(12.5px + var(--rk-type-bump));
    font-weight: 600;
    color: var(--rka-ink-2);
}
.rka-field__label .rka-sub { font-weight: 400; color: var(--rka-muted); }
.rka-field__label .rka-req { color: var(--rka-danger); }

.rka-control { position: relative; display: flex; align-items: center; }

.rka-control__icon {
    position: absolute;
    left: 14px;
    display: grid;
    place-items: center;
    color: var(--rka-muted);
    pointer-events: none;
    transition: color .18s var(--rka-ease);
}
.rka-control__icon svg { width: 17px; height: 17px; display: block; }

.rka-input {
    width: 100%;
    height: 46px;
    padding: 0 46px 0 42px;
    font: inherit;
    font-size:calc(14px + var(--rk-type-bump));
    color: var(--rka-ink);
    /* background-color, not the shorthand — .rka-select paints an arrow into
       background-image and the shorthand would wipe it on focus */
    background-color: var(--rka-field-fill);
    border: 1px solid var(--rka-field-line);
    border-radius: var(--rka-r);
    outline: none;
    transition: border-color .18s var(--rka-ease), box-shadow .18s var(--rka-ease), background-color .18s var(--rka-ease);
    appearance: none;
}
.rka-input::placeholder { color: var(--rka-muted); opacity: .75; }

.rka-input:focus {
    background-color: var(--rka-field);
    border-color: var(--rka-brand);
    box-shadow: var(--rka-ring);
}

.rka-input[readonly] {
    background-color: var(--rka-line);
    color: var(--rka-muted);
    cursor: not-allowed;
}

/* select — pairs with .rka-input on the same element */
.rka-select {
    padding-right: 38px;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%2374788d' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 16px;
}
.rka-control:focus-within .rka-control__icon { color: var(--rka-brand); }

.rka-input.rka-is-invalid {
    border-color: var(--rka-danger);
    box-shadow: 0 0 0 4px rgba(244,106,106,.14);
}

.rka-control__btn {
    position: absolute;
    right: 6px;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: var(--rka-r-sm);
    background: transparent;
    color: var(--rka-muted);
    cursor: pointer;
    transition: background .16s var(--rka-ease), color .16s var(--rka-ease);
}
.rka-control__btn:hover { background: var(--rka-brand-050); color: var(--rka-brand); }
.rka-control__btn svg { width: 18px; height: 18px; }

/* password strength */
.rka-strength { display: flex; gap: 5px; margin-top: 9px; }
.rka-strength span {
    height: 4px; flex: 1;
    border-radius: 99px;
    background: var(--rka-line);
    transition: background .25s var(--rka-ease);
}
.rka-strength[data-level="1"] span:nth-child(-n+1) { background: var(--rka-danger); }
.rka-strength[data-level="2"] span:nth-child(-n+2) { background: var(--rka-warning); }
.rka-strength[data-level="3"] span:nth-child(-n+3) { background: var(--rka-info); }
.rka-strength[data-level="4"] span { background: var(--rka-success); }

.rka-hint { margin: 7px 0 0; font-size:calc(11.5px + var(--rk-type-bump)); color: var(--rka-muted); }
.rka-hint--ok { color: var(--rka-success); }
.rka-hint--bad { color: var(--rka-danger); }

/* section head — numbered groups on the signup form */
.rka-section-head {
    display: flex; align-items: center; gap: 10px;
    margin: 26px 0 16px;
    font-size:calc(12px + var(--rk-type-bump)); font-weight: 700;
    letter-spacing: .09em; text-transform: uppercase;
    color: var(--rka-muted);
}
.rka-section-head::after { content: ""; flex: 1; height: 1px; background: var(--rka-line); }
.rka-section-head b {
    width: 22px; height: 22px; border-radius: 7px;
    display: grid; place-items: center;
    background: var(--rka-brand-050); color: var(--rka-brand);
    font-size:calc(11px + var(--rk-type-bump));
}

.rka-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

/* checkbox */
.rka-check {
    display: flex; align-items: center; gap: 9px;
    cursor: pointer; font-size:calc(13px + var(--rk-type-bump)); color: var(--rka-ink-2);
    margin: 0;
}
.rka-check input { position: absolute; opacity: 0; width: 0; height: 0; }
.rka-check__box {
    width: 18px; height: 18px; flex: 0 0 18px;
    border: 1.5px solid var(--rka-field-line);
    border-radius: 5px;
    background: var(--rka-field);
    display: grid; place-items: center;
    transition: background .16s var(--rka-ease), border-color .16s var(--rka-ease);
}
.rka-check__box svg {
    width: 12px; height: 12px; color: #fff;
    opacity: 0; transform: scale(.6);
    transition: opacity .16s var(--rka-ease), transform .16s var(--rka-ease);
}
/* for multi-line labels (terms + privacy) */
.rka-check--top { align-items: flex-start; }
.rka-check--top .rka-check__box { margin-top: 2px; }

.rka-check input:checked + .rka-check__box { background: var(--rka-brand); border-color: var(--rka-brand); }
.rka-check input:checked + .rka-check__box svg { opacity: 1; transform: scale(1); }
.rka-check input:focus-visible + .rka-check__box { box-shadow: var(--rka-ring); }

.rka-row {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; margin: 4px 0 22px; flex-wrap: wrap;
}

/* buttons */
.rka-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    width: 100%;
    height: 47px;
    padding: 0 18px;
    font: inherit;
    font-size:calc(14.5px + var(--rk-type-bump));
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--rka-r);
    cursor: pointer;
    transition: transform .12s var(--rka-ease), box-shadow .2s var(--rka-ease), background .2s var(--rka-ease);
}
.rka-btn svg { width: 18px; height: 18px; }
.rka-btn:active { transform: translateY(1px); }

.rka-btn--primary {
    color: #fff;
    background: linear-gradient(135deg, var(--rka-brand) 0%, var(--rka-brand-600) 100%);
    box-shadow: 0 12px 26px -14px rgba(85,110,230,.95);
}
.rka-btn--primary:hover { color: #fff; box-shadow: 0 16px 32px -14px rgba(85,110,230,1); }

.rka-btn.rka-is-busy { pointer-events: none; opacity: .85; }
.rka-btn.rka-is-busy .rka-btn__label { opacity: .7; }
.rka-btn.rka-is-busy .rka-btn__arrow { display: none; }

.rka-spinner {
    width: 17px; height: 17px;
    border: 2px solid rgba(255,255,255,.38);
    border-top-color: #fff;
    border-radius: 50%;
    animation: rka-spin .7s linear infinite;
    display: none;
}
.rka-btn.rka-is-busy .rka-spinner { display: block; }
@keyframes rka-spin { to { transform: rotate(360deg); } }

/* alert — carries ViewData["alert"] */
.rka-alert {
    display: flex; gap: 10px;
    padding: 11px 14px;
    border-radius: var(--rka-r);
    font-size:calc(13px + var(--rk-type-bump));
    margin-bottom: 16px;
    border: 1px solid transparent;
}
.rka-alert svg { width: 17px; height: 17px; flex: 0 0 17px; margin-top: 1px; }
.rka-alert--danger {
    color: #b3374a;
    background: rgba(244,106,106,.12);
    border-color: rgba(244,106,106,.28);
}
.rka-alert--info {
    color: #2c6ea8;
    background: rgba(80,165,241,.12);
    border-color: rgba(80,165,241,.28);
}
.rka-shell[data-rka-theme="dark"] .rka-alert--danger { color: #ff9b9b; }
.rka-shell[data-rka-theme="dark"] .rka-alert--info { color: #92c9fb; }

/* footer */
.rka-foot { margin-top: 24px; text-align: center; font-size:calc(13px + var(--rk-type-bump)); color: var(--rka-muted); }
.rka-foot p { margin: 0; }
.rka-foot a { font-weight: 600; }
.rka-foot small { display: block; margin-top: 10px; font-size:calc(11.5px + var(--rk-type-bump)); opacity: .8; }

/* top-bar toggles */
.rka-toggle {
    height: 34px;
    padding: 0 12px;
    display: inline-flex; align-items: center; gap: 7px;
    border: 1px solid var(--rka-line);
    border-radius: 99px;
    background: var(--rka-panel-2);
    color: var(--rka-ink-2);
    font: inherit; font-size:calc(12.5px + var(--rk-type-bump)); font-weight: 600;
    cursor: pointer;
    transition: border-color .16s var(--rka-ease), color .16s var(--rka-ease);
}
.rka-toggle:hover { border-color: var(--rka-brand); color: var(--rka-brand); }
.rka-toggle svg { width: 15px; height: 15px; }

/* ── responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 1100px) {
    .rka-shell { grid-template-columns: minmax(0, 1fr) minmax(400px, .95fr); }
    .rka-visual { padding: 34px; }
    .rka-visual__copy h1 { font-size:calc(28px + var(--rk-type-bump)); }
    .rka-panel__body, .rka-panel__top { padding-left: 34px; padding-right: 34px; }
}

@media (max-width: 860px) {
    /* auto/1fr, otherwise stretch splits the leftover height across both rows
       and the visual band grows to half the screen */
    .rka-shell { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
    .rka-visual { min-height: 210px; padding: 24px 22px; justify-content: flex-end; }
    .rka-visual__copy h1 { font-size:calc(22px + var(--rk-type-bump)); margin-bottom: 4px; }
    .rka-visual__copy p { font-size:calc(13px + var(--rk-type-bump)); }
    .rka-stats { display: none; }
    .rka-brand { position: absolute; top: 22px; left: 22px; }
    .rka-panel { max-height: none; }
    .rka-panel__body { padding: 28px 22px 36px; }
}

@media (max-width: 480px) {
    .rka-visual { min-height: 170px; }
    .rka-eyebrow { display: none; }
    .rka-grid-2 { grid-template-columns: 1fr; }
    .rka-panel__body, .rka-panel__top { padding-left: 18px; padding-right: 18px; }
}

/* entrance */
@keyframes rka-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.rka-form > * { animation: rka-rise .5s var(--rka-ease) both; }
.rka-form > *:nth-child(1) { animation-delay: .04s; }
.rka-form > *:nth-child(2) { animation-delay: .09s; }
.rka-form > *:nth-child(3) { animation-delay: .14s; }
.rka-form > *:nth-child(4) { animation-delay: .19s; }
.rka-form > *:nth-child(5) { animation-delay: .24s; }
.rka-form > *:nth-child(6) { animation-delay: .29s; }

@media (prefers-reduced-motion: reduce) {
    .rka-shell *,
    .rka-shell *::before,
    .rka-shell *::after {
        animation-duration: .001ms !important;
        transition-duration: .001ms !important;
    }
}