:root {
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --success: #10b981;
    --text-main: #f9fafb;
    --text-secondary: #9ca3af;
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --border: #334155;
    --orange: #f97316;
    --font: 'Inter', system-ui, sans-serif;

    /* Warm amber tint for the top half of the converter */
    --bg-amber-top: color-mix(in srgb, var(--bg-card) 88%, var(--orange));
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font);
    background: var(--bg-body);
    color: var(--text-main);
    min-height: 100vh;
    padding: 4rem 2rem 3rem;
    position: relative;
    overflow-x: hidden;
    overflow-y: auto;
}
/* GitHub CTA Banner */
.gh-cta{position:relative;margin:2rem auto 0;padding:2.25rem 2rem;border-radius:1.5rem;background:linear-gradient(135deg,rgba(30,41,59,0.97) 0%,rgba(15,23,42,0.99) 100%);text-align:center;overflow:hidden;isolation:isolate;width:100%;max-width:520px;}
.gh-cta::before{content:'';position:absolute;inset:-1.5px;border-radius:calc(1.5rem + 2px);background:linear-gradient(90deg,hsl(245,65%,55%),hsl(160,60%,32%),hsl(213,70%,55%),hsl(160,60%,32%),hsl(245,65%,55%));background-size:200% auto;animation:animate-rainbow 8s linear infinite;z-index:-1;opacity:0.22;}
.gh-cta::after{content:'';position:absolute;bottom:-20%;left:50%;transform:translateX(-50%);width:60%;height:50%;background:radial-gradient(ellipse,rgba(99,102,241,0.1) 0%,transparent 70%);pointer-events:none;z-index:0;}
.gh-cta-inner{position:relative;z-index:1;}
.gh-cta-octocat{width:44px;height:44px;color:var(--text-main);margin:0 auto 1rem;display:block;opacity:0.9;filter:drop-shadow(0 0 12px rgba(99,102,241,0.5));transition:filter 0.3s,transform 0.3s;}
.gh-cta:hover .gh-cta-octocat{filter:drop-shadow(0 0 20px rgba(129,140,248,0.8));transform:scale(1.08) rotate(-4deg);}
.gh-cta-eyebrow{display:inline-flex;align-items:center;gap:0.4rem;padding:0.2rem 0.75rem;background:rgba(99,102,241,0.12);border:1px solid rgba(99,102,241,0.25);border-radius:99px;font-size:0.68rem;font-weight:700;text-transform:uppercase;letter-spacing:0.1em;color:var(--primary-hover);margin-bottom:0.75rem;}
.gh-cta-eyebrow-dot{width:5px;height:5px;border-radius:50%;background:var(--primary-hover);animation:pulse 2s ease-in-out infinite;}
.gh-cta-title{font-size:1.35rem;font-weight:900;letter-spacing:-0.04em;line-height:1.1;color:#f1f5f9;text-shadow:-1px -1px 0 rgba(0,0,0,0.9),1px -1px 0 rgba(0,0,0,0.9),-1px 1px 0 rgba(0,0,0,0.9),1px 1px 0 rgba(0,0,0,0.9),0 0 16px rgba(129,140,248,0.3);margin-bottom:0.65rem;}
.gh-cta-text{color:#e2e8f0;font-size:0.92rem;line-height:1.65;margin:0 auto 1.5rem;text-shadow:0 1px 3px rgba(0,0,0,0.85);}
.gh-cta-text strong{color:var(--text-main);font-weight:600;}
.gh-cta .github-btn{height:2.65rem;padding:0 1.4rem;font-size:0.9rem;}
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.25;
    pointer-events: none;
    z-index: 0;
}
.orb-1 { top:-20%; left:-15%; width:70vw; height:70vw; background: radial-gradient(circle, var(--primary) 0%, transparent 65%); animation: float 28s infinite ease-in-out alternate; }
.orb-2 { bottom:-20%; right:-15%; width:60vw; height:60vw; background: radial-gradient(circle, var(--orange) 0%, transparent 65%); animation: float 34s infinite ease-in-out alternate-reverse; }
@keyframes float {
    0%   { transform: translate(0,0) scale(1); }
    50%  { transform: translate(4%,5%) scale(1.05); }
    100% { transform: translate(0,0) scale(1); }
}
.card {
    position: relative;
    z-index: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    padding: 3rem 2.5rem;
    max-width: 520px;
    width: 100%;
    box-sizing: border-box;
    text-align: center;
    box-shadow: 0 4px 40px -8px rgba(0,0,0,0.6);
    animation: revealUp 0.6s cubic-bezier(0.34,1.56,0.64,1) both;
}
@keyframes revealUp {
    from { opacity:0; transform: translateY(32px) scale(0.97); }
    to   { opacity:1; transform: translateY(0) scale(1); }
}
.icon-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(249,115,22,0.15));
    border: 1px solid rgba(99,102,241,0.3);
    margin-bottom: 1.5rem;
}
.icon-wrap svg { width:36px; height:36px; }
.wip-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.9rem;
    background: rgba(249,115,22,0.12);
    border: 1px solid rgba(249,115,22,0.3);
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--orange);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
}
.wip-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--orange);
    animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
    0%,100% { opacity:1; transform:scale(1); }
    50%      { opacity:0.4; transform:scale(0.7); }
}
h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, var(--primary-hover), var(--orange));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.75rem;
}
p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.65;
    margin-bottom: 2rem;
}
.back-btn{display:inline-flex;align-items:center;gap:0.5rem;padding:0.7rem 1.5rem;background:rgba(99,102,241,0.1);border:1px solid rgba(99,102,241,0.35);border-radius:0.6rem;color:var(--primary-hover);font-family:var(--font);font-size:0.9rem;font-weight:600;text-decoration:none;transition:background 0.25s,border-color 0.25s,transform 0.25s;cursor:pointer;}
.back-btn:hover{background:rgba(99,102,241,0.2);border-color:var(--primary-hover);transform:translateY(-2px);}
.back-btn svg{width:16px;height:16px;}

/* Preview image */
.preview-wrap{margin:1.5rem 0 1.75rem;text-align:left;}
.preview-label{font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-secondary);margin-bottom:0.5rem;}
.preview-img-box{position:relative;border-radius:0.75rem;overflow:hidden;border:1px solid var(--border);}
.preview-img{width:100%;display:block;filter:brightness(0.82) saturate(0.9);transition:filter 0.3s;}
.preview-img-box:hover .preview-img{filter:brightness(1) saturate(1.1);}
.preview-img-overlay{position:absolute;inset:0;background:linear-gradient(to bottom,transparent 50%,rgba(15,23,42,0.6));pointer-events:none;}
.preview-badge{position:absolute;bottom:0.6rem;right:0.7rem;background:rgba(15,23,42,0.75);border:1px solid rgba(255,255,255,0.1);border-radius:99px;padding:0.2rem 0.65rem;font-size:0.65rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-secondary);backdrop-filter:blur(8px);}
.action-row{display:flex;gap:0.75rem;flex-wrap:wrap;justify-content:center;align-items:center;margin-top:2rem;}

/* Calculator Dashboard Layout */
.app-container {
    width: 100%;
    max-width: 1700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

#app-header-section {
    text-align: left;
    margin-bottom: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
    width: 100%;
}
.app-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    background: linear-gradient(90deg, #818cf8 0%, #f97316 25%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}
.app-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
}

.header-content {
    position: relative;
    width: 100%;
}

.app-header-copy {
    padding-right: 220px;
}

/* Keep header CTA buttons on one horizontal row */
.app-header-actions {
    display: flex;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.9rem;
}

.top-controls {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.top-controls #custom-language-select {
    width: max-content;
    min-width: 180px;
}

.top-controls #custom-language-select .custom-options {
    width: max-content;
    min-width: 100%;
    left: auto;
    right: 0;
}

.language-select.hidden {
    display: none;
}

#app-header-section #see-more-btn:hover {
    width: 262px;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    column-gap: 2rem !important;
    row-gap: 2rem;
    align-items: flex-start;
}

/* Left Panel: Controls */
.controls-panel {
    position: relative;
    z-index: 10;
    border: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    overflow: visible;
    background: transparent;
}

/* --- Converter stack with dedicated spacer row --- */
.converter-stack {
    position: relative;
    --card-gap: 15px;
    --notch-radius: 22px;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto var(--card-gap) auto;
    grid-template-areas:
        "send"
        "spacer"
        "receive";
}

.send-card,
.receive-card {
    border-radius: 1rem;
    border: none;
    padding: 1.15rem 1rem 1rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    overflow: visible;
    margin: 0 !important;
}

/* --- HORNÍ KARTA --- */
.send-card {
    grid-area: send;
    background: rgba(249, 115, 22, 0.12);
    position: relative;
    padding-bottom: 1.25rem;
    border-radius: 1rem;
    /* Hlavní maska karty */
    -webkit-mask-image: radial-gradient(ellipse 24px 17px at 50% 100%, transparent 95%, black 100%);
    mask-image: radial-gradient(ellipse 24px 17px at 50% 100%, transparent 95%, black 100%);
    /* Trik: Místo borderu použijeme box-shadow, který simuluje outline */
    box-shadow: 
        inset 0 0 0 1px color-mix(in srgb, var(--orange) 45%, var(--border)),
        0 18px 48px -36px rgba(249, 115, 22, 0.5);
}

.send-card::before {
    content: none;
}

/* --- SPODNÍ KARTA --- */
.receive-card {
    grid-area: receive;
    background: var(--bg-card);
    position: relative;
    border-radius: 1rem;
    /* Hlavní maska karty */
    -webkit-mask-image: radial-gradient(ellipse 24px 17px at 50% 0%, transparent 95%, black 100%);
    mask-image: radial-gradient(ellipse 24px 17px at 50% 0%, transparent 95%, black 100%);
    /* Trik: Šedý vnitřní outline */
    box-shadow: 
        inset 0 0 0 1px var(--border),
        0 18px 52px -40px rgba(0, 0, 0, 0.65);
}

.receive-card::before {
    content: none;
}

.send-card .input-group,
.receive-card .input-group {
    margin-bottom: 0;
}

.receive-card .input-group + .input-group {
    margin-top: 0.9rem;
}

/* Dedicated middle spacer row for independent swap button */
.spacer-row {
    grid-area: spacer;
    position: relative;
    height: var(--card-gap);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

/* --- TLAČÍTKO --- */
.swap-button {
    position: relative;
    /* Ujisti se, že střed tlačítka je přesně v ose mezery */
    z-index: 100;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.swap-button .swap-btn {
    pointer-events: auto;
    background: color-mix(in srgb, var(--bg-card) 92%, #0b1221);
    border: 1px solid var(--border);
    box-shadow:
        0 0 15px rgba(0, 0, 0, 0.3),
        0 16px 40px -22px rgba(0, 0, 0, 0.8);
}
.controls-panel-border {
    display: none;
}
.controls-panel-border path {
    fill: none;
    stroke-width: 2;
}
.controls-panel-border-track {
    stroke: rgba(99, 102, 241, 0.1);
}
.controls-panel-border-wave {
    stroke: var(--primary);
    stroke-dasharray: 20 80;
    stroke-dashoffset: 0;
    animation: controls-panel-wave 10s linear infinite;
    opacity: 0.5;
}
.controls-panel-border-wave-secondary {
    stroke: var(--orange);
    animation-direction: reverse;
    animation-duration: 15s;
}
@keyframes controls-panel-wave {
    to { stroke-dashoffset: -100; }
}
.controls-content {
    position: relative;
    z-index: 1;
}

.api-status {
    background: rgba(249,115,22,0.1);
    border: 1px solid rgba(249,115,22,0.3);
    color: var(--orange);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    text-align: center;
}
.api-status.hidden {
    display: none;
}

.input-group {
    margin-bottom: 1.5rem;
}
.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.6rem;
}
.input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: color-mix(in srgb, var(--bg-card) 92%, transparent);
    border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
    border-radius: 0.75rem;
    padding: 0.4rem;
    transition: border-color 0.2s;
}
.input-wrapper:focus-within {
    border-color: var(--primary);
}

/* Blend inputs with their card backgrounds */
.send-card .input-wrapper {
    background:
        linear-gradient(180deg,
            rgba(249, 115, 22, 0.16) 0%,
            rgba(249, 115, 22, 0.09) 100%);
    border-color: color-mix(in srgb, var(--orange) 30%, var(--border));
}

.send-card .quick-amounts {
    margin-top: 0.38rem;
}

.receive-card .input-wrapper {
    background:
        linear-gradient(180deg,
            color-mix(in srgb, var(--bg-body) 86%, transparent) 0%,
            color-mix(in srgb, var(--bg-body) 92%, transparent) 100%);
    border-color: color-mix(in srgb, var(--border) 70%, transparent);
}
.input-wrapper input {
    flex: 1 1 0;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.5rem;
    width: 100%;
    min-width: 0;
    outline: none;
    text-overflow: ellipsis;
}
.percent-symbol {
    color: var(--text-secondary);
    padding-right: 1rem;
    font-weight: 600;
}

.currency-select-native {
    position: absolute;
    opacity: 0;
    pointer-events: none;
    width: 1px;
    height: 1px;
}
.custom-select {
    position: relative;
    flex: 0 0 auto;
    max-width: 48%;
    min-width: 0;
}
.custom-select-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    color: var(--text-main);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.custom-select-value {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    min-width: 0;
    flex: 1;
}
.custom-select-text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}
.custom-select-trigger:hover,
.custom-select.open .custom-select-trigger {
    border-color: var(--primary-hover);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.hist-currency,
.rate-pair {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    min-width: 0;
}

.custom-select-option-text {
    white-space: nowrap;
}

.custom-select-chevron {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    flex-shrink: 0;
}
.custom-select-chevron svg {
    width: 16px;
    height: 16px;
}
.custom-select.open .custom-select-chevron svg {
    transform: rotate(180deg);
}
.custom-select-menu {
    position: fixed;
    width: min(400px, 90vw);
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transform-origin: top;
    display: flex;
    flex-direction: column;
    padding: 0.4rem;
    border-radius: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 9999;
    transition: max-height 0.3s ease, opacity 0.2s ease, transform 0.2s ease;
}
/* Custom Scrollbar for Dropdown */
.custom-select-options::-webkit-scrollbar {
    width: 6px;
}
.custom-select-options::-webkit-scrollbar-track {
    background: transparent;
}
.custom-select-options::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
.custom-select-options::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}
.custom-select.open-up .custom-select-menu {
    top: auto;
    bottom: calc(100% + 0.45rem);
    transform: translateY(8px);
    transform-origin: bottom;
}
.custom-select.open .custom-select-menu {
    max-height: 280px !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    transform: translateY(0) !important;
    transition: max-height 0.3s ease, opacity 0.2s ease, transform 0.2s ease;
}
.custom-select-options {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    /* Smooth native scrolling inside the list on iOS */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    touch-action: pan-y;
}
.custom-select-search-wrapper {
    position: relative;
    margin-bottom: 0.4rem;
    flex-shrink: 0;
}
.custom-select-search {
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    outline: none;
}
.custom-select-search:focus {
    border-color: var(--primary);
}
.custom-select-search-clear {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0;
}
.custom-select-search-clear:hover {
    color: var(--text-main);
}
.custom-select-option {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.65rem;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-main);
    border-radius: 0.6rem;
    cursor: pointer;
    text-align: left;
    font-size: 0.8rem;
    /* Start visible for debugging */
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.3s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), background 0.2s, border-color 0.2s;
    transition-delay: 0s;
}
.custom-select-option:hover,
.custom-select-option.selected {
    background: rgba(99, 102, 241, 0.14);
    border-color: rgba(129, 140, 248, 0.3);
}
.custom-select-option:hover {
    transform: translateY(-1px);
}
.flag-icon {
    width: 22px;
    height: 22px;
    aspect-ratio: 1 / 1;
    flex-shrink: 0;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(148, 163, 184, 0.12);
}
.flag-icon.is-fallback {
    background: rgba(148, 163, 184, 0.3);
}

.quick-amounts {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}
.quick-amount-btn {
    flex: 1;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--primary-hover);
    padding: 0.4rem 0;
    border-radius: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.quick-amount-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-hover);
}

.swap-wrapper {
    display: flex;
    justify-content: center;
    margin: -22px 0;
    position: relative;
    z-index: 10;
}

/* Remove the previous panel-split background layers */
.swap-wrapper::before,
.swap-wrapper::after {
    content: none;
}
.swap-btn {
    position: relative;
    z-index: 1;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--bg-card) 82%, var(--bg-body));
    border: 1px solid var(--border);
    color: var(--primary-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.3s, border-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* “Notch” ring so it feels inset between cards */
.swap-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}
.swap-btn.rotate {
    transform: rotate(180deg);
}
.swap-btn svg { width: 18px; height: 18px; }

.copy-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 0.4rem;
    transition: color 0.2s, background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.copy-btn:hover {
    color: var(--primary-hover);
    background: rgba(99, 102, 241, 0.1);
}
.copy-btn svg { width: 18px; height: 18px; }

/* Right Panel: Results & Chart */
.results-panel {
    --results-content-width: min(980px, 100%);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.summary-cards {
    width: var(--results-content-width);
    margin: 0;
    display: flex;
    justify-content: center;
}

.conversion-result-box {
    position: relative;
    overflow: hidden;
    width: fit-content;
    min-width: min(560px, 100%);
    max-width: min(860px, 100%);
    padding: 1.6rem 1.5rem;
    border-radius: 20px;
    border: 1px solid rgba(129, 140, 248, 0.25);
    background:
        radial-gradient(120% 120% at 0% 0%, rgba(99, 102, 241, 0.2) 0%, transparent 55%),
        linear-gradient(145deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 41, 59, 0.82) 45%, rgba(49, 46, 129, 0.58) 100%);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 12px 36px -18px rgba(99, 102, 241, 0.65);
}

.conversion-result-box::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    pointer-events: none;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.conversion-main-row {
    padding-bottom: 1rem;
    margin-bottom: 0.95rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.conversion-main-label {
    margin: 0 0 0.35rem;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 700;
}

.conversion-main-value {
    margin: 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.55rem;
    font-size: clamp(1.6rem, 4vw, 2.35rem);
    font-weight: 800;
    line-height: 1.08;
    color: #f8fafc;
    text-shadow: 0 6px 20px rgba(15, 23, 42, 0.55);
}

.conversion-main-value .flag-icon {
    width: 28px;
    height: 28px;
}

.conversion-main-value span {
    min-width: 0;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.conversion-details {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.conversion-detail {
    margin: 0;
    font-size: 0.95rem;
    color: #e2e8f0;
    line-height: 1.5;
}

.conversion-detail-muted {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.conversion-total {
    margin-top: 0.25rem;
    font-weight: 700;
    color: #34d399;
}

.conversion-detail #fee-amount,
.conversion-detail #total-pay {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.conversion-total .flag-icon {
    width: 20px;
    height: 20px;
}
.card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}
.card h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.card .value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
}
.card.profit {
    border-color: rgba(16, 185, 129, 0.4);
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.8), rgba(16, 185, 129, 0.05));
}
.card.profit .value {
    color: var(--success);
}
.profit-percent {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    margin-top: 0.5rem;
}
.profit-percent.up { color: var(--success); }
.profit-percent.down { color: #ef4444; }

.chart-header {
    width: var(--results-content-width);
    margin: 0 0 0.65rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 1rem;
}
.rate-info-container {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.graph-title {
    font-size: 1.2rem;
    color: var(--text-main);
    margin: 0;
}
.rate-display {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.rate-equals {
    color: var(--text-main);
    font-weight: 700;
}
.rate-updated {
    color: var(--text-secondary);
}

.time-filters {
    display: flex;
    background: rgba(15,23,42,0.5);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.25rem;
}
.time-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 0.3rem;
    cursor: pointer;
    transition: all 0.2s;
}
.time-btn.active, .time-btn:hover {
    background: var(--bg-card);
    color: var(--text-main);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.chart-container {
    background: linear-gradient(145deg, rgba(249, 115, 22, 0.08), rgba(15, 23, 42, 0.6));
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: 1rem;
    padding: 1.5rem;
    height: 350px;
    width: var(--results-content-width);
    margin: 0;
    position: relative;
    box-shadow: 
        0 0 20px rgba(251, 191, 36, 0.1),
        inset 0 0 0 1px rgba(251, 191, 36, 0.05);
}

/* Add golden glow to candlestick chart canvas */
.chart-container canvas {
    filter: drop-shadow(0 0 3px rgba(251, 191, 36, 0.15));
}

.history-section {
    width: var(--results-content-width);
    margin: 0;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
}
.history-title {
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: 1rem;
    margin-top: 0;
}
.history-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}
.history-list li {
    /* Card visuals are defined by the 2-row layout block below. */
    display: flex;
    flex-direction: column;
}
.history-list li.empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    background: transparent;
    border: 1px dashed var(--border);
}
.history-toggle-btn {
    margin-top: 1rem;
    border: 1px solid rgba(99, 102, 241, 0.35);
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary-hover);
    border-radius: 0.65rem;
    padding: 0.55rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease, background 0.24s ease, color 0.24s ease;
}
.history-toggle-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}
.history-toggle-btn:active {
    transform: translateY(0) scale(0.995);
}
.history-toggle-btn.is-clicked {
    animation: history-toggle-press 240ms cubic-bezier(0.22, 1, 0.36, 1);
}
.history-toggle-btn.hidden {
    display: none;
}

.history-list li.history-item-extra {
    overflow: hidden;
    max-height: 260px;
    opacity: 1;
    transform: translateY(0);
    transition: max-height 420ms cubic-bezier(0.22, 1, 0.36, 1), opacity 320ms ease, transform 420ms cubic-bezier(0.22, 1, 0.36, 1), margin 420ms cubic-bezier(0.22, 1, 0.36, 1), padding 420ms cubic-bezier(0.22, 1, 0.36, 1), border-width 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

.history-list:not(.is-expanded) li.history-item-extra {
    max-height: 0;
    opacity: 0;
    transform: translateY(-8px);
    margin: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-width: 0;
    pointer-events: none;
}

@keyframes history-toggle-press {
    0% {
        transform: translateY(-1px) scale(1);
    }
    45% {
        transform: translateY(0) scale(0.965);
    }
    100% {
        transform: translateY(-1px) scale(1);
    }
}
.hist-main {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    min-width: 0;
    flex-wrap: wrap;
}
.hist-amt {
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.hist-res {
    color: var(--text-main);
    font-weight: 700;
    font-size: 1rem;
}
.hist-currency {
    min-width: 0;
    flex: 1 1 0;
}
.hist-currency span {
    min-width: 0;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.hist-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* --- Recent conversions: cleaner 2-row card layout --- */
.history-list li {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    width: 100%;
    min-width: 250px;
    padding: 0.95rem 1rem 0.85rem;
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.78), rgba(30, 41, 59, 0.64));
    border: 1px solid rgba(129, 140, 248, 0.2);
    border-radius: 0.85rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 10px 24px -20px rgba(99, 102, 241, 0.55);
    font-family: 'DM Sans', var(--font), 'Inter', system-ui, sans-serif;
}

.hist-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    min-width: 0;
}

.hist-flags {
    display: inline-flex;
    align-items: center;
    gap: 0.38rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.hist-codes {
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-secondary);
    opacity: 0.9;
    white-space: nowrap;
}

.hist-bottom-row {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.42rem;
    min-width: 0;
}

.hist-amount {
    font-size: clamp(0.9rem, 1.75vw, 1.02rem);
    font-weight: 800;
    color: #e2e8f0;
    line-height: 1.2;
    white-space: nowrap;
}

.hist-arrow {
    color: rgba(148, 163, 184, 0.95);
    flex-shrink: 0;
}

.hist-date-row {
    display: flex;
    justify-content: flex-end;
    margin-top: 0.08rem;
}

.hist-date {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.9;
    white-space: nowrap;
}

@media (max-width: 900px) {
    .history-list li {
        min-width: 0;
    }

    .hist-top-row {
        gap: 0.45rem;
    }

    .hist-codes {
        font-size: 0.72rem;
    }

    .hist-amount {
        font-size: 0.95rem;
    }
}

@media (max-width: 992px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    .conversion-result-box {
        padding: 1.25rem;
        border-radius: 18px;
    }
    .controls-panel {
        max-width: 580px;
        margin: 0 auto;
    }
    .custom-select {
        flex-basis: 220px;
    }
}

@media (max-width: 900px) {
    :root {
        --mobile-body-padding: clamp(0.65rem, 3vw, 1rem);
        --mobile-section-gap: clamp(0.85rem, 2.8vw, 1.15rem);
        --mobile-card-radius: 18px;
        --mobile-control-height: 50px;
        --mobile-title-size: clamp(1.35rem, 6vw, 1.75rem);
        --mobile-subtitle-size: clamp(0.86rem, 3.4vw, 0.95rem);
    }
    
    /* Reduce gap between send and receive cards on mobile */
    .converter-stack {
        --card-gap: 1px;
    }

    body {
        padding: var(--mobile-body-padding);
        padding-bottom: 1.2rem;
    }

    .app-container {
        max-width: 100%;
    }

    #app-header-section {
        margin-bottom: var(--mobile-section-gap);
    }

    .header-content {
        align-items: flex-start;
        gap: 0.8rem;
    }

    .app-header-copy {
        width: 100%;
        padding-right: 0;
    }

    .app-title {
        font-size: var(--mobile-title-size);
        margin-bottom: 0.35rem;
        line-height: 1.12;
    }

    .app-description {
        font-size: var(--mobile-subtitle-size);
        margin-bottom: 0.25rem;
        line-height: 1.45;
    }

    .header-content {
        align-items: flex-start;
        gap: 0.5rem;
        display: grid;
        grid-template-columns: 1fr;
        grid-template-areas:
            "title"
            "description"
            "buttons"
            "seemore";
    }

    .app-header-copy {
        width: 100%;
        padding-right: 0;
        display: contents;
    }
    
    .app-title {
        grid-area: title;
        font-size: var(--mobile-title-size);
        margin-bottom: 0;
        line-height: 1.12;
    }

    .app-description {
        grid-area: description;
        font-size: var(--mobile-subtitle-size);
        margin-bottom: 0;
        line-height: 1.45;
    }
    
    /* Buttons area - just GitHub button */
    .app-header-actions {
        grid-area: buttons;
        display: contents;
        width: 100%;
        margin-top: 0;
    }
    
    /* GitHub button - in buttons area */
    .app-header-actions .github-btn {
        grid-area: buttons;
        padding: 0 0.7rem;
        gap: 0.4rem;
        min-width: auto;
        min-height: 44px;
        height: 44px;
        justify-self: start;
    }

    /* See more button - full width in its own row */
    .app-header-actions #see-more-btn {
        grid-area: seemore;
        width: 100% !important;
        justify-content: center;
        font-weight: 600;
        background: rgba(99, 102, 241, 0.18);
        border-color: rgba(99, 102, 241, 0.35);
        box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
        min-height: 44px;
        height: 44px;
        transition: none !important;
    }
    
    /* Disable all state animations on mobile */
    .app-header-actions #see-more-btn:hover,
    .app-header-actions #see-more-btn:active,
    .app-header-actions #see-more-btn:focus {
        width: 100% !important;
        transform: none !important;
    }

    /* Language selector - in buttons area, right side */
    .top-controls {
        grid-area: buttons;
        position: static;
        width: auto;
        align-items: flex-start;
        margin-top: 0;
        justify-self: end;
        align-self: start;
    }
    
    /* Make language selector same height as buttons */
    .top-controls #custom-language-select,
    .top-controls #custom-language-select .selected-option {
        min-height: 44px;
        height: 44px;
    }
    
    /* Show only "GitHub" text instead of "View on GitHub" */
    .app-header-actions .github-btn .gh-label {
        font-size: 0;
    }
    
    .app-header-actions .github-btn .gh-label::after {
        content: "GitHub";
        font-size: 0.82rem;
    }
    
    .app-header-actions .github-btn .gh-logo {
        width: 18px;
        height: 18px;
    }
    
    .app-header-actions #see-more-btn .smb-label {
        font-size: 0.85rem;
        font-weight: 600;
    }

    .app-header-actions .github-btn,
    .app-header-actions #see-more-btn {
        max-width: 100%;
    }

    .calculator-grid {
        display: flex;
        flex-direction: column;
        gap: var(--mobile-section-gap);
    }

    .controls-panel,
    .chart-container,
    .history-section,
    .conversion-result-box {
        border-radius: var(--mobile-card-radius);
    }

    .controls-panel {
        padding: 1rem 0.9rem;
    }

    .controls-content {
        gap: 0.8rem;
    }

    .input-group {
        margin-bottom: 1rem;
    }

    .input-group label {
        font-size: 0.82rem;
        margin-bottom: 0.45rem;
    }

    .input-wrapper {
        min-height: var(--mobile-control-height);
        padding: 0.45rem;
    }

    .input-wrapper input {
        min-height: calc(var(--mobile-control-height) - 8px);
        font-size: 1rem;
    }

    .custom-select {
        width: 100%;
        max-width: 52%;
    }

    .custom-select-trigger {
        min-height: calc(var(--mobile-control-height) - 8px);
        font-size: 0.86rem;
        padding: 0.6rem 0.65rem;
    }

    .quick-amounts {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding-bottom: 0;
    }

    .quick-amount-btn {
        flex: 1 1 calc(50% - 0.25rem);
        min-width: 80px;
        min-height: 42px;
        font-size: 0.85rem;
        padding: 0 0.8rem;
        border-radius: 0.55rem;
    }

    .swap-btn {
        width: 46px;
        height: 46px;
    }

    .copy-btn {
        min-width: 38px;
        min-height: 38px;
    }

    .results-panel {
        gap: var(--mobile-section-gap);
    }

    .conversion-result-box {
        width: 100%;
        min-width: 0;
        max-width: 100%;
        padding: 1.25rem 1rem;
    }

    .conversion-main-value {
        font-size: clamp(1.45rem, 7.2vw, 1.95rem);
    }

    .conversion-main-value .flag-icon {
        width: 24px;
        height: 18px;
    }

    .conversion-detail {
        font-size: 0.9rem;
    }

    .conversion-detail-muted {
        font-size: 0.83rem;
    }

    .chart-header {
        margin-bottom: 0.25rem;
        gap: 0.75rem;
    }

    .graph-title {
        font-size: 1.05rem;
    }

    .rate-display {
        font-size: 0.8rem;
        line-height: 1.35;
        gap: 0.4rem;
    }

    .time-filters {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        justify-content: space-between;
        flex-wrap: nowrap;
        gap: 0.25rem;
    }

    .time-btn {
        flex: 1 1 0;
        min-width: 0;
        min-height: 40px;
        padding: 0.35rem 0.5rem;
    }

    .chart-container {
        height: clamp(255px, 42vh, 315px);
        padding: 0.9rem 0.7rem;
    }

    .history-section {
        padding: 1rem 0.85rem;
    }

    .history-title {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }

    .history-list {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .history-list li {
        padding: 0.85rem;
        border-radius: 0.8rem;
    }

    .hist-main {
        gap: 0.4rem;
    }
}

@media (max-width: 420px) {
    .app-header-actions {
        gap: 0.65rem;
    }

    .github-btn {
        padding: 0 0.85rem;
        font-size: 0.8rem;
    }

    /* Uses shared mobile sizing from Modules/shared.css */

    .controls-panel {
        padding: 0.85rem 0.75rem;
    }

    .input-wrapper {
        gap: 0.3rem;
    }
    
    /* Limit currency dropdown width on mobile to show more of the amount */
    .input-wrapper .custom-select {
        max-width: 120px;
        flex-shrink: 0;
    }
    
    /* Ensure input takes remaining space */
    .input-wrapper input[type="number"],
    .input-wrapper input[type="text"] {
        flex: 1;
        min-width: 0;
    }

    .input-wrapper input {
        font-size: 0.95rem;
    }

    .custom-select {
        max-width: 56%;
    }

    .custom-select-trigger {
        font-size: 0.8rem;
        padding: 0.52rem 0.5rem;
    }

    .conversion-result-box {
        padding: 1.05rem 0.85rem;
    }

    .conversion-main-label {
        font-size: 0.7rem;
    }

    .conversion-main-value {
        font-size: clamp(1.25rem, 7.5vw, 1.7rem);
    }

    .chart-container {
        height: 245px;
        padding: 0.75rem 0.6rem;
    }
}

/* Bug 2 — Reduce card padding on mobile so it doesn't overflow horizontally */
@media (max-width: 768px) {
    .card {
        padding: 1rem;
        max-width: 100%;
    }

    .controls-panel,
    .controls-panel > *,
    .input-group,
    .input-wrapper {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    
    /* Fix conversion result box width on mobile */
    .conversion-result-box {
        min-width: 0;
        width: 100%;
        max-width: 100%;
    }
    
    /* Fix chart header width on mobile */
    .chart-header {
        width: 100%;
        max-width: 100%;
    }
    
    /* Fix chart container width on mobile */
    .chart-container {
        width: 100%;
        max-width: 100%;
    }
    
    /* Fix history section width on mobile */
    .history-section {
        width: 100%;
        max-width: 100%;
    }
    
    /* Fix results panel content */
    .results-panel {
        --results-content-width: 100%;
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }
    
    .summary-cards {
        width: 100%;
        max-width: 100%;
    }
}

/* Bug 3 — Quick-amount buttons: 2-column grid on very small screens */
@media (max-width: 480px) {
    .quick-amounts {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        flex-wrap: unset; /* override the flex-wrap from the 900px block */
    }

    .quick-amount-btn {
        flex: unset;
        min-width: unset;
        width: 100%;
    }
}