:root {
    --bg: #0f0907;
    --bg-deep: #170d09;
    --panel: rgba(31, 18, 13, 0.9);
    --panel-soft: rgba(53, 33, 21, 0.9);
    --line: rgba(214, 180, 108, 0.22);
    --line-strong: rgba(243, 213, 148, 0.42);
    --text: #f9f1e5;
    --muted: #ccb79d;
    --gold: #dfb86c;
    --gold-soft: #f0d699;
    --gold-deep: #9f6b2a;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Manrope", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 12%, rgba(223, 184, 108, 0.16), transparent 22%),
        radial-gradient(circle at 88% 14%, rgba(255, 231, 188, 0.1), transparent 20%),
        linear-gradient(135deg, #0b0705 0%, #160d09 40%, #120906 100%);
}

.page-shell {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 120px 120px;
    mask-image: radial-gradient(circle at center, black 44%, transparent 90%);
    opacity: 0.3;
}

.container {
    position: relative;
    z-index: 1;
    width: min(1320px, calc(100% - 32px));
    margin: 14px auto 22px;
}

.hero-card,
.card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.hero-card {
    padding: 18px 22px;
    border-radius: 36px;
    margin-bottom: 18px;
    background:
        linear-gradient(135deg, rgba(66, 43, 28, 0.96), rgba(18, 11, 8, 0.94)),
        radial-gradient(circle at top right, rgba(223, 184, 108, 0.18), transparent 30%);
}

.hero-card::before,
.card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(120deg, rgba(255,255,255,0.06), transparent 22%, transparent 78%, rgba(255,255,255,0.04));
}

.hero-topbar,
.brand-lockup,
.brand-copy,
.main-grid {
    position: relative;
    z-index: 1;
}

.hero-topbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
}

.brand-lockup {
    display: flex;
    align-items: center;
    gap: 28px;
}

.brand-mark {
    width: 118px;
    min-width: 118px;
    height: 118px;
    display: grid;
    place-items: center;
    padding: 18px;
    border-radius: 32px;
    border: 1px solid var(--line-strong);
    background: linear-gradient(145deg, rgba(255, 244, 220, 0.1), rgba(137, 83, 18, 0.14));
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.12),
        0 18px 44px rgba(0, 0, 0, 0.34);
}

.brand-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 14px 28px rgba(0, 0, 0, 0.24));
}

.eyebrow,
.section-kicker {
    margin: 0 0 8px;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.24em;
    font-size: 0.74rem;
    font-weight: 800;
}

h1,
h2,
.result-header {
    margin: 0;
    font-family: "Cormorant Garamond", serif;
    font-weight: 600;
    letter-spacing: 0.01em;
}

h1 {
    font-size: clamp(2.4rem, 4.6vw, 4.4rem);
    line-height: 0.92;
    margin-bottom: 14px;
}

h2 {
    font-size: clamp(1.9rem, 3vw, 2.6rem);
    line-height: 0.95;
}

.hero-text {
    max-width: 760px;
    margin: 0;
    color: var(--muted);
    font-size: 0.98rem;
    line-height: 1.55;
}

.language-switcher {
    display: inline-flex;
    padding: 8px;
    gap: 8px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
}

.main-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(340px, 0.78fr);
    gap: 18px;
    align-items: start;
}

.form-column,
.result-column {
    display: grid;
    gap: 18px;
}

.card {
    padding: 18px;
    border-radius: 32px;
    background: linear-gradient(180deg, rgba(35, 21, 15, 0.96), rgba(20, 12, 9, 0.94));
}

.rate-card {
    background: linear-gradient(135deg, rgba(72, 47, 28, 0.96), rgba(29, 17, 12, 0.96));
}

.card-heading {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.rate-grid,
.input-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

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

.rate-tile,
.selected-rate-banner,
.making-charge-toggle,
.old-gold-module {
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.035);
}

.rate-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 12px;
}

.rate-tile {
    padding: 14px;
    border-radius: 22px;
}

.rate-chip {
    display: inline-flex;
    margin-bottom: 12px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(223, 184, 108, 0.12);
    border: 1px solid rgba(223, 184, 108, 0.2);
    color: var(--gold-soft);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.section-header {
    margin: 12px 0 12px;
    color: var(--gold-soft);
    font-size: 0.88rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.16em;
}

.purity-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 4px;
}

.purity-toolbar .section-header {
    margin: 0 0 12px;
}

.mini-btn {
    padding: 10px 14px;
    font-size: 0.84rem;
}

.selected-rate-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
    padding: 12px 14px;
    border-radius: 22px;
}

.selected-rate-banner span {
    color: var(--muted);
    font-weight: 700;
}

.selected-rate-banner strong {
    color: var(--gold-soft);
    font-size: 1rem;
}

.selected-rate-input-group {
    margin-bottom: 22px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 12px;
}

label,
.toggle-header,
.checkbox-group label,
.result-item span:first-child {
    color: var(--muted);
    font-size: 0.93rem;
    font-weight: 600;
}

input,
select,
button {
    font: inherit;
    -webkit-tap-highlight-color: transparent;
}

input,
select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    background: rgba(255, 248, 240, 0.05);
    color: var(--text);
    outline: none;
    transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease, background 0.22s ease;
}

.glass-select {
    appearance: none;
    -webkit-appearance: none;
    color: var(--gold-soft);
    font-weight: 800;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.025)),
        radial-gradient(circle at top left, rgba(223, 184, 108, 0.18), transparent 34%);
    border-color: rgba(223, 184, 108, 0.22);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 14px 28px rgba(0, 0, 0, 0.18);
}

.glass-select option {
    color: #2d1a06;
    background: #f9f1e5;
}

input::placeholder {
    color: rgba(204, 183, 157, 0.72);
}

input:focus,
select:focus {
    border-color: var(--line-strong);
    box-shadow: 0 0 0 4px rgba(223, 184, 108, 0.14);
    transform: translateY(-1px);
    background: rgba(255, 248, 240, 0.08);
}

button {
    border: 0;
    cursor: pointer;
    border-radius: 999px;
    padding: 14px 24px;
    font-weight: 800;
    letter-spacing: 0.01em;
    touch-action: manipulation;
    transition: transform 0.24s ease, box-shadow 0.24s ease, opacity 0.24s ease;
}

button:hover {
    transform: translateY(-2px);
}

#save-rate-button,
.calculate-btn {
    color: #2d1a06;
    background: linear-gradient(135deg, #f4d998, #c88f36);
    box-shadow: 0 18px 34px rgba(200, 143, 54, 0.28);
}

.secondary-gold-btn {
    color: var(--gold-soft);
    background: rgba(223, 184, 108, 0.1);
    border: 1px solid rgba(223, 184, 108, 0.24);
}

.clear-btn,
.language-switcher button,
.purity-btn {
    color: var(--text);
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.language-switcher button.active,
.purity-btn.active {
    color: #2d1a06;
    background: linear-gradient(135deg, #f2d493, #b98336);
    border-color: transparent;
    box-shadow: 0 12px 24px rgba(185, 131, 54, 0.22);
}

.purity-selection {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 14px;
}

.purity-card {
    display: grid;
    grid-template-columns: minmax(110px, auto) 1fr;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-radius: 22px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.035);
}

.purity-card.active {
    border-color: rgba(223, 184, 108, 0.44);
    background: rgba(223, 184, 108, 0.075);
}

.purity-btn {
    width: 100%;
    min-width: 0;
    padding: 12px 14px;
}

.purity-rate {
    color: var(--gold-soft);
    font-size: 0.88rem;
    font-weight: 800;
    text-align: right;
}

.purity-manual-rate {
    grid-column: 1 / -1;
    padding: 11px 12px;
    border-radius: 14px;
}

.making-charge-toggle,
.old-gold-module {
    padding: 14px;
    border-radius: 24px;
}

.old-gold-title {
    margin-bottom: 10px;
    text-align: center;
    color: var(--gold-soft);
    font-family: "Cormorant Garamond", serif;
    font-size: 1.7rem;
    font-weight: 700;
}

.old-rate-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 10px 0;
    flex-wrap: wrap;
}

.purity-hint {
    color: var(--gold-soft);
    font-size: 0.82rem;
    font-weight: 800;
}

.old-rate-actions span {
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 700;
}

.toggle-switch,
.toggle-header,
.checkbox-group,
.button-group {
    display: flex;
    align-items: center;
}

.toggle-switch {
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
}

.toggle-switch span {
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
}

.toggle-switch span.active {
    color: var(--gold-soft);
}

.switch {
    position: relative;
    width: 60px;
    height: 32px;
    display: inline-flex;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.08);
}

.slider::before {
    content: "";
    position: absolute;
    top: 3px;
    left: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f2d493, #b98336);
    transition: transform 0.22s ease;
}

.switch input:checked + .slider::before {
    transform: translateX(27px);
}

.toggle-header {
    justify-content: space-between;
    gap: 14px;
}

#old-gold-toggle,
#cashback-checkbox {
    width: 18px;
    height: 18px;
    accent-color: #d8b36a;
}

.checkbox-group {
    gap: 10px;
    margin-top: 6px;
}

.button-group {
    justify-content: flex-end;
    gap: 14px;
    margin-top: 16px;
}

.button-group button {
    min-width: 160px;
}

.result-section {
    position: sticky;
    top: 20px;
}

.result-header {
    margin-bottom: 14px;
    font-size: 2.25rem;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 11px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.result-item span:last-child {
    font-weight: 800;
    text-align: right;
}

.featured-result span:last-child,
.final-amount span:last-child {
    color: var(--gold-soft);
    font-family: "Manrope", sans-serif;
    font-size: 1.12rem;
    font-weight: 800;
    letter-spacing: 0.01em;
    line-height: 1.15;
    text-shadow: 0 0 18px rgba(223, 184, 108, 0.14);
}

.final-amount span:last-child {
    font-size: 1.26rem;
}

.final-amount {
    border-bottom: 0;
    padding-top: 20px;
}

hr {
    height: 1px;
    border: 0;
    background: linear-gradient(90deg, transparent, rgba(223, 184, 108, 0.5), transparent);
    margin: 14px 0 2px;
}

.success-message {
    min-height: 22px;
    margin: 12px 0 0;
}

.hidden {
    display: none !important;
}

@media (max-width: 1100px) {
    .main-grid {
        grid-template-columns: 1fr;
    }

    .result-section {
        position: static;
    }

    .rate-grid,
    .purity-selection {
        grid-template-columns: 1fr;
    }

    .purity-card {
        grid-template-columns: 1fr;
    }

    .purity-rate {
        text-align: left;
    }
}

@media (max-width: 820px) {
    body {
        min-height: 100svh;
        font-size: 12px;
        background:
            radial-gradient(circle at 20% 0%, rgba(223, 184, 108, 0.16), transparent 22%),
            linear-gradient(145deg, #090604 0%, #1a0f0a 55%, #090604 100%);
    }

    .brand-lockup {
        flex-direction: row;
        align-items: center;
        gap: 8px;
    }

    .hero-topbar {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
    }

    .brand-mark {
        width: 54px;
        min-width: 54px;
        height: 54px;
        padding: 6px;
        border-radius: 15px;
    }

    h1 {
        max-width: 190px;
        font-size: 1.42rem;
        line-height: 0.94;
        margin-bottom: 0;
    }

    h2 {
        font-size: 1.34rem;
    }

    .hero-text {
        display: none;
    }

    .eyebrow,
    .section-kicker,
    .section-header {
        margin-bottom: 3px;
        font-size: 0.54rem;
        letter-spacing: 0.13em;
    }

    .input-grid,
    .button-group {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 6px;
    }

    .rate-grid,
    .purity-selection {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 5px;
        margin-bottom: 6px;
    }

    .purity-card {
        gap: 5px;
        padding: 6px;
        border-radius: 14px;
    }

    .rate-actions {
        justify-content: stretch;
        margin-bottom: 6px;
    }

    .rate-actions button {
        width: 100%;
    }

    .button-group {
        flex-direction: row;
    }

    .button-group button {
        min-width: 0;
        width: 100%;
    }

    .language-switcher {
        flex-shrink: 0;
        padding: 3px;
        gap: 3px;
    }

    .language-switcher button {
        padding: 7px 9px;
        font-size: 0.72rem;
    }

    .selected-rate-banner,
    .toggle-switch,
    .result-item {
        flex-direction: row;
        align-items: center;
    }

    .purity-toolbar {
        align-items: center;
        flex-direction: row;
        gap: 6px;
    }

    .purity-toolbar .mini-btn {
        width: auto;
        padding: 7px 9px;
        font-size: 0.68rem;
    }

    .result-item span:last-child {
        text-align: right;
    }

    .card,
    .hero-card {
        padding: 7px;
        border-radius: 16px;
        box-shadow: 0 14px 40px rgba(0, 0, 0, 0.32);
    }

    .container {
        width: min(100% - 8px, 100%);
        margin: 4px auto 8px;
    }

    .main-grid,
    .form-column,
    .result-column {
        gap: 5px;
    }

    input,
    select,
    textarea {
        font-size: 16px;
    }

    button {
        min-height: 0;
        padding: 7px 8px;
        border-radius: 11px;
        font-size: 0.78rem;
    }

    .rate-tile,
    .making-charge-toggle,
    .old-gold-module {
        padding: 6px;
        border-radius: 14px;
    }

    .rate-chip {
        margin-bottom: 5px;
        padding: 5px 7px;
        font-size: 0.6rem;
        letter-spacing: 0.05em;
    }

    .purity-btn {
        padding: 7px 5px;
        font-size: 0.62rem;
        letter-spacing: 0;
    }

    .purity-rate,
    .purity-hint {
        font-size: 0.58rem;
        line-height: 1.1;
    }

    .purity-manual-rate {
        padding: 6px 7px;
        font-size: 0.68rem;
    }

    .selected-rate-banner {
        margin-bottom: 6px;
        padding: 7px 9px;
        border-radius: 13px;
    }

    .selected-rate-banner strong {
        font-size: 0.78rem;
    }

    .input-group {
        gap: 4px;
        margin-bottom: 6px;
    }

    label,
    .toggle-header,
    .checkbox-group label,
    .result-item span:first-child {
        font-size: 0.68rem;
    }

    .toggle-switch {
        gap: 6px;
    }

    .toggle-switch span {
        font-size: 0.68rem;
    }

    .switch {
        width: 44px;
        height: 24px;
    }

    .slider::before {
        width: 18px;
        height: 18px;
        top: 2px;
        left: 3px;
    }

    .switch input:checked + .slider::before {
        transform: translateX(20px);
    }

    .old-gold-title {
        margin-bottom: 5px;
        font-size: 1.18rem;
    }

    .old-rate-actions {
        gap: 6px;
        margin: 5px 0;
    }

    .old-rate-actions span {
        display: none;
    }

    .checkbox-group {
        margin-top: 3px;
    }

    .button-group {
        gap: 6px;
        margin-top: 7px;
    }

    .result-header {
        font-size: 1.24rem;
        margin-bottom: 3px;
    }

    .result-item {
        gap: 8px;
        padding: 4px 0;
    }

    .result-item span:last-child {
        font-size: 0.72rem;
    }

    .featured-result span:last-child,
    .final-amount span:last-child {
        font-size: 0.88rem;
        line-height: 1.1;
    }

    .final-amount span:last-child {
        font-size: 0.96rem;
    }

    hr {
        margin: 5px 0 1px;
    }

    .success-message {
        min-height: 12px;
        margin: 4px 0 0;
        font-size: 0.68rem;
    }
}

@media (max-width: 640px) {
    .container {
        width: min(100% - 6px, 100%);
        margin: 3px auto 6px;
    }

    .hero-card,
    .card {
        padding: 6px;
        border-radius: 14px;
    }

    .hero-card {
        margin-bottom: 5px;
    }

    .brand-mark {
        width: 46px;
        min-width: 46px;
        height: 46px;
    }

    h1 {
        max-width: 160px;
        font-size: 1.2rem;
    }

    h2 {
        font-size: 1.12rem;
    }

    .main-grid {
        grid-template-columns: 1fr;
    }

    .card-heading {
        margin-bottom: 6px;
    }

    .rate-grid,
    .purity-selection {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

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

    .result-column {
        order: 3;
    }
}