@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&display=swap');

:root {
    --bg-color: #f4f6f8;
    --content-bg-color: #ffffff;
    --text-color: #1a1d21;
    --text-light: #6b7280;
    --border-color: #e1e4e8;
    --primary-color: #007AFF;
    --primary-light: rgba(0, 122, 255, 0.08);
    --button-hover-bg: #f0f2f5;
    --address-bg-color: #f8f9fa;
    --card-shadow: 0 5px 18px rgba(0, 0, 0, 0.06);
    --qr-border-color: #eaecef;
    --qr-bg: var(--content-bg-color);
    --control-bg: rgba(255, 255, 255, 0.9);
    --control-border: rgba(0, 0, 0, 0.07);
    --control-hover-bg: rgba(255, 255, 255, 1);
    --control-text: #333;
    --transition-speed-fast: 0.18s;
    --transition-speed-medium: 0.28s;
    --transition-speed-slow: 0.45s;
    --transition-timing-func: cubic-bezier(0.4, 0, 0.2, 1);
    --qr-container-padding: 8px;
    --qr-border-radius: 10px;
    --qr-outer-border-radius: 14px;
    --button-active-scale: 0.96;
    --button-active-opacity: 0.85;
    --qr-placeholder-color: #e9ecef;
}

body.dark-theme {
    --bg-color: #121212;
    --content-bg-color: #1e1e1e;
    --text-color: #e1e1e1;
    --text-light: #909296;
    --border-color: #373A40;
    --primary-color: #0A84FF;
    --primary-light: rgba(10, 132, 255, 0.15);
    --button-hover-bg: #2a2d31;
    --address-bg-color: #25262b;
    --card-shadow: 0 8px 25px rgba(0, 0, 0, 0.35);
    --qr-border-color: #373A40;
    --qr-bg: var(--content-bg-color);
    --control-bg: rgba(40, 40, 42, 0.9);
    --control-border: rgba(255, 255, 255, 0.1);
    --control-hover-bg: rgba(44, 44, 46, 1);
    --control-text: #f1f3f5;
    --qr-placeholder-color: #343a40;
}

html { height: 100%; scroll-behavior: smooth; }
body {
    font-family: 'Manrope', sans-serif; background-color: var(--bg-color);
    color: var(--text-color); margin: 0; display: flex; justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    height: 100%;
    padding: 60px 15px 20px 15px;
    box-sizing: border-box; -webkit-tap-highlight-color: transparent;
    transition: background-color var(--transition-speed-medium) ease, color var(--transition-speed-medium) ease;
    overflow: hidden;
    overscroll-behavior-y: contain;
}
.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}
button:focus, a:focus, [tabindex]:focus { outline: none; }

.app-wrapper {
    width: 100%; max-width: 400px; position: relative; display: flex;
    flex-direction: column;
    align-items: center; 
    margin-top: 0;
    height: 100%;
    max-height: calc(100vh - 80px);
}
.app-container {
    width: 100%; position: relative; overflow: hidden;
    flex-grow: 1;
    display: flex;
    align-items: flex-start;
}

.top-controls {
    position: absolute;
    top: -45px;
    right: 0; display: flex; gap: 8px;
    z-index: 10;
}
.control-button {
    background-color: var(--control-bg); border: 1px solid var(--control-border);
    color: var(--control-text); padding: 6px 10px;
    border-radius: 8px;
    cursor: pointer; font-size: 0.75em;
    font-weight: 600;
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    transition: background-color var(--transition-speed-fast) ease,
                transform var(--transition-speed-fast) ease,
                box-shadow var(--transition-speed-fast) ease,
                opacity var(--transition-speed-fast) ease;
    display: flex; align-items: center; justify-content: center;
    min-width: 34px; min-height: 28px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.control-button:hover { transform: translateY(-1px) scale(1.02); }
.control-button:active { transform: translateY(0) scale(var(--button-active-scale)); opacity: var(--button-active-opacity); transition-duration: 0.05s;}
.control-button svg { width: 16px; height: 16px; }

.step {
    box-sizing: border-box; width: 100%; position: absolute; top: 0; left: 0;
    display: flex; flex-direction: column; opacity: 0;
    transform: translateY(10px) scale(0.99);
    visibility: hidden;
    transition: opacity var(--transition-speed-medium) ease-out,
                transform var(--transition-speed-medium) ease-out,
                visibility 0s var(--transition-speed-medium);
    padding-bottom: 10px;
}
.step.active {
    opacity: 1; transform: translateY(0) scale(1); visibility: visible;
    transition: opacity var(--transition-speed-medium) ease-in var(--transition-speed-fast),
                transform var(--transition-speed-slow) var(--transition-timing-func) var(--transition-speed-fast),
                visibility 0s;
    position: relative;
    height: 100%;
    overflow-y: auto;
    overscroll-behavior-y: contain;
}

h2 {
    text-align: center; color: var(--text-color);
    margin: 10px 0 20px 0;
    font-weight: 600; font-size: 1.2em;
    line-height: 1.3;
    flex-shrink: 0;
}
h2.step-title-with-icon {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    text-align: left;
    margin-bottom: 20px;
}
.title-icon {
    width: 28px; height: 28px;
    vertical-align: middle; flex-shrink: 0;
    border-radius: 50%; object-fit: cover;
}
.title-text-container { display: flex; flex-direction: column; line-height: 1.3; }
.dynamic-text { font-weight: 700; }

.selection-grid, .wallet-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 15px;
    flex-shrink: 0;
}
.loading-placeholder {
    grid-column: 1 / -1; text-align: center; color: var(--text-light);
    padding: 30px 15px;
    font-size: 0.9em; min-height: 80px;
    display: flex; align-items: center; justify-content: center;
}

.currency-button, .network-button {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 16px 10px;
    border: 1px solid var(--border-color); border-radius: 12px;
    cursor: pointer;
    transition: border-color var(--transition-speed-fast) ease,
                background-color var(--transition-speed-fast) ease,
                transform var(--transition-speed-medium) var(--transition-timing-func),
                box-shadow var(--transition-speed-medium) var(--transition-timing-func),
                opacity var(--transition-speed-fast) ease;
    background-color: var(--content-bg-color); text-align: center;
    min-height: 80px;
    color: var(--text-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    font-size: 1.2em;
    line-height: 1.25;
    max-width: 100%;
    word-wrap: break-word;
    font-family: 'Manrope', sans-serif;
    position: relative;
    overflow: hidden;
    -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none;
}
.currency-button img {
    width: 30px; height: 30px;
    margin-bottom: 8px;
    transition: transform var(--transition-speed-medium) var(--transition-timing-func);
    border-radius: 50%;
}
.currency-button span, .network-button span {
    font-size: 0.78em;
    font-weight: 500; line-height: 1.25;
    max-width: 100%; word-wrap: break-word; color: var(--text-color);
}
.currency-button:hover, .network-button:hover { transform: translateY(-3px); box-shadow: 0 4px 10px rgba(0, 122, 255, 0.1); border-color: var(--primary-color); background-color: var(--primary-light); }
.currency-button:active, .network-button:active { transform: translateY(-1px) scale(var(--button-active-scale)); box-shadow: 0 2px 5px rgba(0, 122, 255, 0.08); opacity: var(--button-active-opacity); transition-duration: 0.05s; }

.currency-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}
.network-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(75px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
}

.qr-code-area { display: flex; justify-content: center; margin-bottom: 15px; flex-shrink: 0; }
.qr-code-container {
    position: relative; width: 55%;
    max-width: 200px;
    margin: 0 auto; background: var(--qr-bg);
    border: 1px solid transparent;
    border-radius: var(--qr-outer-border-radius);
    padding: 0;
    box-sizing: border-box;
    box-shadow: var(--card-shadow);
    transition: background var(--transition-speed-medium) ease, border-color var(--transition-speed-medium) ease;
    aspect-ratio: 1 / 1;
    display: flex; align-items: center; justify-content: center;
    width: 70%;
}
#qrcode {
    width: 100%; height: 100%;
    position: relative;
    border-radius: var(--qr-border-radius);
    overflow: hidden;
    background-color: transparent;
    display: flex; align-items: center; justify-content: center;
}
#qrcode object {
    display: block;
    width: 100%; height: 100%;
    max-width: 100%; max-height: 100%;
    object-fit: contain;
    border-radius: var(--qr-border-radius);
    transition: opacity 0.3s ease;
    pointer-events: none;
}
#qrcode .qr-placeholder {
    width: 100%; height: 100%;
    background-color: var(--qr-placeholder-color);
    border-radius: var(--qr-border-radius);
}
#qrcode .qr-error-message {
    color: #dc3545; background-color: var(--qr-placeholder-color);
    font-size: 0.75em;
    text-align: center; padding: 8px;
    margin: 0; width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--qr-border-radius);
}

.instruction {
    text-align: center; font-size: 0.8em;
    color: var(--text-light);
    margin-bottom: 12px;
    line-height: 1.5;
    flex-shrink: 0;
}
.instruction strong { color: var(--text-color); font-weight: 600; }
.address-info {
    display: flex; align-items: center; justify-content: space-between;
    background-color: var(--address-bg-color); padding: 9px 12px;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    transition: background-color var(--transition-speed-medium) ease, border-color var(--transition-speed-medium) ease;
    flex-shrink: 0;
}
body.dark-theme .address-info { border-color: #424549; }
.address-text {
    font-family: 'SF Mono', Monaco, Consolas, 'Courier New', monospace;
    font-size: 0.85em;
    word-break: break-all; flex-grow: 1; margin-right: 8px;
    color: var(--text-color); line-height: 1.3;
    transition: color var(--transition-speed-medium) ease;
}

.action-button {
    background-color: var(--primary-color); color: white; border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 0.82em;
    font-weight: 600;
    transition: background-color var(--transition-speed-fast) ease,
                opacity var(--transition-speed-fast) ease,
                transform var(--transition-speed-medium) var(--transition-timing-func);
    white-space: nowrap; flex-shrink: 0;
    -webkit-user-select: none; user-select: none;
}
.action-button svg { margin-right: 6px; height: 1em; width: 1em; }
.action-button:hover:not(:disabled) { background-color: #006ae0; transform: scale(1.03); }
body.dark-theme .action-button:hover:not(:disabled) { background-color: #1e90ff; }
.action-button:active:not(:disabled) { transform: scale(var(--button-active-scale)); opacity: var(--button-active-opacity); transition-duration: 0.05s; }
.action-button.copied { background-color: #34C759; transform: scale(1); }
.action-button.copied span { animation: pulseFeedback 0.5s var(--transition-timing-func); }
@keyframes pulseFeedback { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }

.pay-via-section { margin-top: 1px; text-align: center; flex-shrink: 0; }
.pay-via-section p {
    color: var(--text-light); margin-bottom: 10px;
    font-size: 0.8em;
    font-weight: 500; transition: color var(--transition-speed-medium) ease;
}

.wallet-button {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 14px;
    border-radius: 10px;
    text-decoration: none; font-weight: 600;
    transition: background-color var(--transition-speed-medium) ease,
                color var(--transition-speed-medium) ease,
                opacity var(--transition-speed-fast) ease,
                transform var(--transition-speed-medium) var(--transition-timing-func),
                box-shadow var(--transition-speed-medium) var(--transition-timing-func);
    margin-bottom: 12px;
    cursor: pointer; vertical-align: middle;
    border: 1px solid transparent; box-sizing: border-box;
    -webkit-user-select: none; user-select: none;
    flex-shrink: 0;
}
.wallet-button img {
    width: 20px; height: 20px;
    margin-right: 8px;
    border-radius: 6px;
    overflow: hidden; vertical-align: middle;
}

.send-button {
    background-color: var(--primary-color); color: white; width: 100%;
    box-shadow: 0 3px 10px -2px rgba(0, 122, 255, 0.3);
}
.send-button:hover { background-color: #006ae0; transform: translateY(-2px); box-shadow: 0 5px 14px -2px rgba(0, 122, 255, 0.35); }
body.dark-theme .send-button { box-shadow: 0 3px 10px -2px rgba(10, 132, 255, 0.3); }
body.dark-theme .send-button:hover { background-color: #1e90ff; box-shadow: 0 5px 14px -2px rgba(10, 132, 255, 0.35); }
.send-button:active { transform: translateY(-1px) scale(var(--button-active-scale)); opacity: var(--button-active-opacity); box-shadow: 0 2px 4px rgba(0, 122, 255, 0.2); transition-duration: 0.05s; }

.wallet-grid {
    grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    gap: 8px;
    margin-top: 10px;
    margin-bottom: 10px;
    flex-shrink: 0;
}
.wallet-button.square {
    flex-direction: column;
    padding: 8px 4px;
    border: 1px solid var(--border-color);
    background-color: var(--content-bg-color); width: auto;
    min-height: 70px;
    color: var(--text-color); margin-bottom: 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02); border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.wallet-button.square img {
    width: 28px; height: 28px;
    margin: 0 0 5px 0;
    border-radius: 8px;
    flex-shrink: 0;
}
.wallet-button.square span {
    font-size: 0.72em;
    display: block; line-height: 1.2;
    font-weight: 500;
    word-wrap: break-word; color: var(--text-color);
    max-width: 100%;
}
.wallet-button.square:hover { border-color: var(--primary-color); background-color: var(--primary-light); transform: translateY(-3px); box-shadow: 0 4px 8px rgba(0, 122, 255, 0.1); }
.wallet-button.square:active { transform: translateY(-1px) scale(var(--button-active-scale)); box-shadow: 0 2px 5px rgba(0, 122, 255, 0.08); opacity: var(--button-active-opacity); transition-duration: 0.05s; }

.back-button {
    display: inline-block; margin-top: 15px;
    padding: 8px 16px;
    border: 1px solid var(--border-color); background: none; color: var(--text-light);
    border-radius: 10px;
    cursor: pointer; font-size: 0.85em;
    font-weight: 500;
    transition: background-color var(--transition-speed-fast) ease,
                color var(--transition-speed-fast) ease,
                border-color var(--transition-speed-fast) ease,
                transform var(--transition-speed-medium) var(--transition-timing-func),
                opacity var(--transition-speed-fast) ease;
    align-self: flex-start;
    -webkit-user-select: none; user-select: none;
    flex-shrink: 0;
}
.back-button:hover { 
    background-color: var(--button-hover-bg); 
    color: var(--text-color); 
    border-color: var(--text-light); 
    transform: translateY(-2px); 
}

.back-button:active { 
    transform: scale(var(--button-active-scale)); 
    background-color: var(--border-color); 
    opacity: var(--button-active-opacity); 
    transition-duration: 0.05s; 
}

@media (max-width: 420px) {
    body { padding: 55px 10px 15px 10px; }
    .app-wrapper { max-height: calc(100vh - 70px); }
    .top-controls { top: -40px; }
    h2 { font-size: 1.15em; margin-bottom: 15px; }
    .selection-grid { grid-template-columns: repeat(auto-fit, minmax(70px, 1fr)); }
    #deposit-details .qr-code-container { width: 50%; max-width: 140px; }
    #deposit-details .wallet-grid { grid-template-columns: repeat(auto-fit, minmax(65px, 1fr)); }
}

@media (max-width: 360px) {
    body { padding: 50px 8px 10px 8px; }
    .app-wrapper { max-height: calc(100vh - 60px); }
    h2 { font-size: 1.1em; margin-bottom: 12px; }
    .selection-grid { gap: 8px; }
    #deposit-details .qr-code-container { width: 48%; max-width: 130px; }
    #deposit-details .wallet-grid { gap: 6px; grid-template-columns: repeat(auto-fit, minmax(60px, 1fr)); }
    .wallet-button.square { min-height: 65px; }
    .wallet-button.square img { width: 26px; height: 26px; }
    .wallet-button.square span { font-size: 0.7em; }
    .back-button { padding: 7px 14px; font-size: 0.8em; }
    .action-button { padding: 7px 10px; font-size: 0.8em; }
    .address-text { font-size: 0.8em; }
}

#deposit-details {
    display: flex;
    flex-direction: column;
    height: 100%;
}
#deposit-details > *:last-child {
     margin-bottom: 0;
}