styles.css

/* note that a stylesheet is better included inside the HTML
   file so that the updates are immediate; otherwise you may
   need to change styles.css to another filename on each changed
   deployment in order to keep the caches (like Cloudflare) happy */

html {
    color-scheme: light dark
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    border-radius: 24px;
    padding: 32px;
    box-shadow:
        0 25px 80px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    max-width: 440px;
    width: 100%;
    backdrop-filter: blur(10px);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 28px;
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.header h1 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header .subtitle {
    font-size: 14px;
    margin-top: 6px;
}

.header .bitcoin-symbol {
    font-size: 40px;
    font-weight: bold;
    text-shadow: 0 2px 8px rgba(247, 147, 26, 0.3);
}


.setup-link {
    font-size: 20px;
    text-decoration: none;
    opacity: 0.6;
    transition: opacity 0.2s;
    margin-left: auto;
}

.setup-link:hover {
    opacity: 1;
}

/* Input mode toggle */
.input-mode-toggle {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    border-radius: 10px;
    padding: 4px;
}

.mode-button {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.mode-button.active {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* POS Footer */
.pos-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #e9ecef;
    text-align: center;
}

.pos-footer .wallet-id {
    font-family: 'Courier New', monospace;
    font-size: 11px;
    word-break: break-all;
    line-height: 1.4;
    min-height: 32px;
    /* Reserve space for ~2 lines of DWID */
    display: block;
}

/* Loading state */
.loading-initial {
    text-align: center;
    padding: 60px 20px;
    min-height: 520px;
}

/* Features List */
.features-list {
    list-style: none;
    padding: 0;
    margin: 0 0 24px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.features-list li {
    font-size: 14px;
    line-height: 1.5;
    padding: 10px 14px;
    border-radius: 10px;
    border-left: 3px solid #f7931a;
}

.features-list a {
    text-decoration: none;
    font-weight: 500;
}

.features-list a:hover {
    text-decoration: underline;
}

/* Setup Form */
.setup-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
}

.form-hint {
    font-size: 12px;
}

.hint-link {
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.hint-link:hover {
    text-decoration: underline;
}

/* Checkbox group */
.checkbox-group {
    margin-top: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-label span {
    font-weight: 500;
}

.descriptor-input {
    width: 100%;
    padding: 14px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 13px;
    font-family: 'Courier New', monospace;
    resize: vertical;
    min-height: 100px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.descriptor-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.15);
}

.currency-select {
    width: 100%;
    padding: 14px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
}

.currency-select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.15);
}

/* Message display */
.message {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 14px;
    display: none;
}

.message.error {
    display: block;
    border: 1px solid #feb2b2;
}

.message.success {
    display: block;
    border: 1px solid #9ae6b4;
}

/* Generated Link Section */
.generated-link-section {
    margin-top: 28px;
    padding-top: 28px;
    border-top: 2px solid #e9ecef;
}

.generated-link-section h2 {
    font-size: 18px;
    margin-bottom: 16px;
    text-align: center;
}

.link-display {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.link-input {
    flex: 1;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 13px;
    font-family: 'Courier New', monospace;
}

.copy-button {
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s;
}

.copy-button:active {
    transform: scale(0.95);
}

.qr-container {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.qr-container img {
    border-radius: 8px;
}

.link-hint {
    text-align: center;
    font-size: 13px;
    margin-bottom: 16px;
}

.open-pos-button {
    display: block;
    text-align: center;
    padding: 14px 24px;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.2s;
}

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

/* WASM Status */
.wasm-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    padding: 10px;
    border-radius: 8px;
    font-size: 13px;
    min-height: 42px;
    /* Reserve space to prevent layout shift */
    transition: opacity 0.2s, visibility 0.2s;
}

.wasm-status.hidden {
    visibility: hidden;
    opacity: 0;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.status-indicator.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

.status-indicator.error {
    background: #dc3545;
}

.status-text {
    min-width: 180px;
    /* Reserve space for status messages */
    text-align: left;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Receive Page */
.receive-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.amount-summary {
    text-align: center;
    padding: 20px;
    border: 2px solid #f7931a;
    border-radius: 14px;
}

.amount-row {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 8px;
}

.amount-row.secondary {
    margin-top: 4px;
}

.amount-label {
    font-size: 14px;
    font-weight: 500;
}

.amount-sats {
    font-size: 28px;
    font-weight: 700;
    font-family: 'Courier New', monospace;
}

.amount-fiat {
    font-size: 16px;
    font-family: 'Courier New', monospace;
}

.qr-section {
    display: flex;
    justify-content: center;
    padding: 10px;
}

.qr-section img {
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.qr-section img.payment-success {
    animation: checkmark-pop 0.4s ease-out;
    box-shadow: 0 8px 24px rgba(34, 197, 94, 0.4);
}

@keyframes checkmark-pop {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.invoice-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.invoice-section label {
    font-size: 14px;
    font-weight: 600;
}

.invoice-display {
    display: flex;
    gap: 8px;
}

.invoice-textarea {
    flex: 1;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 11px;
    font-family: 'Courier New', monospace;
    resize: none;
    height: 80px;
    word-break: break-all;
}

.secondary-button:hover:not(:disabled) {
    box-shadow: 0 8px 24px rgba(108, 117, 125, 0.4) !important;
}

/* Error Page */
.error-container {
    text-align: center;
    padding: 40px 20px;
}

.error-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.error-container h2 {
    margin-bottom: 12px;
}

.error-message {
    margin-bottom: 28px;
    line-height: 1.6;
}

.error-button {
    display: inline-block;
    text-decoration: none;
}

/* POS Page Styles */
.content-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.left-section {
    order: 1;
}

.right-section {
    order: 2;
}

.display {
    border: 2px solid #dee2e6;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 10px;
    display: flex;
    justify-content: flex-end;
    align-items: baseline;
    transition: all 0.2s;
}

.display.secondary-mode {
    padding: 14px 20px;
}

.display.secondary-mode .amount-value {
    font-size: 20px;
}

.display.secondary-mode .currency-code {
    font-size: 14px;
}

.amount-value {
    text-align: right;
    min-width: 150px;
    font-size: 36px;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

.currency-code {
    font-size: 18px;
    margin-left: 8px;
    font-weight: 600;
    min-width: 50px;
    flex-shrink: 0;
}

.satoshi-display {
    border: 2px solid #f7931a;
    border-radius: 14px;
    padding: 15px 20px;
    margin-bottom: 12px;
    display: flex;
    justify-content: flex-end;
    align-items: baseline;
    transition: all 0.2s;
}

.satoshi-display.primary-mode {
    padding: 20px;
}

.satoshi-display.primary-mode .satoshi-value {
    font-size: 36px;
}

.satoshi-display.primary-mode .satoshi-symbol {
    font-size: 18px;
}

.satoshi-display.secondary-mode {
    padding: 14px 20px;
}

.satoshi-display.secondary-mode .satoshi-value {
    font-size: 20px;
}

.satoshi-display.secondary-mode .satoshi-symbol {
    font-size: 12px;
}

.satoshi-value {
    text-align: right;
    min-width: 150px;
    font-size: 24px;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

.satoshi-symbol {
    font-size: 14px;
    margin-left: 8px;
    font-weight: 600;
    min-width: 50px;
    flex-shrink: 0;
}

.rate-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 13px;
}

.rate-value {
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

.description-section {
    margin-bottom: 20px;
}

.description-section label {
    display: block;
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 500;
}

.description-input {
    width: 100%;
    padding: 14px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.description-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.15);
}

/* Keypad */
.keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 10px;
}

.keypad-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 12px;
}

.key {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 18px;
    font-size: 24px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.key:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.key:active {
    transform: translateY(0);
}

.key.zero {
    grid-column: span 2;
}

/* Submit Button */
.submit-button {
    width: 100%;
    padding: 18px;
    border: none;
    border-radius: 14px;
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.submit-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(247, 147, 26, 0.4);
}

.submit-button:active:not(:disabled) {
    transform: translateY(0);
}

.submit-button:disabled {
    cursor: not-allowed;
    transform: none;
}

.submit-button .button-loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.submit-button .spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Desktop responsive */
@media (min-width: 1024px) {
    .container {
        max-width: 1000px;
    }

    .content-wrapper {
        flex-direction: row;
        gap: 32px;
        align-items: flex-start;
    }

    .left-section {
        flex: 1;
        order: 1;
    }

    .right-section {
        flex: 1;
        order: 2;
        display: flex;
        flex-direction: column;
    }
}

/* Mobile responsive */
@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    .container {
        padding: 20px;
        border-radius: 20px;
    }

    .amount-value {
        font-size: 28px;
    }

    .key {
        padding: 14px;
        font-size: 20px;
    }

    .submit-button {
        padding: 16px;
        font-size: 18px;
    }
}

/* ========================================
   DOCS & FAQ PAGES STYLES
   ======================================== */

/* Docs container override - wider for tutorial content */
.docs-container {
    max-width: 600px;
}

/* Docs/FAQ responsive - expand on larger screens */
@media (min-width: 768px) {
    .docs-container {
        max-width: 720px;
    }
}

@media (min-width: 1024px) {
    .docs-container {
        max-width: 800px;
    }
}

/* Back link */
.back-link {
    display: inline-block;
    margin-bottom: 16px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

/* Tutorial Grid */
.tutorials-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tutorial-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    border: 2px solid #e9ecef;
    border-radius: 16px;
    text-decoration: none;
    transition: all 0.2s;
}

.tutorial-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.tutorial-card:hover .tutorial-arrow {
    transform: translateX(4px);
}

.tutorial-icon {
    flex-shrink: 0;
}

.wallet-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    font-size: 28px;
    font-weight: 700;
}

.blockstream-icon {
    background: linear-gradient(135deg, #00b894 0%, #009d7d 100%);
    color: white;
}

.aqua-icon {
    background: linear-gradient(135deg, #00cec9 0%, #0984e3 100%);
}

.bull-icon {
    background: linear-gradient(135deg, #ff6b35 0%, #e55100 100%);
}

.tutorial-card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.tutorial-card p {
    font-size: 14px;
    line-height: 1.4;
}

.tutorial-arrow {
    margin-left: auto;
    font-size: 24px;
    transition: all 0.2s;
    flex-shrink: 0;
}

/* Docs Footer */
.docs-footer {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
    text-align: center;
}

.docs-footer p {
    font-size: 13px;
    line-height: 1.6;
}

.docs-footer a {
    text-decoration: none;
}

.docs-footer a:hover {
    text-decoration: underline;
}

/* Tutorial Page Specific Styles */
.tutorial-content {
    line-height: 1.7;
}

.tutorial-content h2 {
    font-size: 20px;
    margin: 24px 0 12px 0;
    font-weight: 600;
}

.tutorial-content h2:first-child {
    margin-top: 0;
}

.tutorial-content p {
    margin-bottom: 16px;
}

.tutorial-content ol,
.tutorial-content ul {
    margin-bottom: 16px;
    padding-left: 24px;
}

.tutorial-content li {
    margin-bottom: 12px;
}

.tutorial-content code {
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

.tutorial-content .note {
    border: 2px solid #f7931a;
    border-radius: 12px;
    padding: 16px;
    margin: 20px 0;
}

.tutorial-content .note-title {
    font-weight: 600;
    margin-bottom: 8px;
}

.tutorial-content .note p {
    margin-bottom: 0;
    font-size: 14px;
}

.tutorial-content .warning {
    border: 2px solid #fc8181;
    border-radius: 12px;
    padding: 16px;
    margin: 20px 0;
}

.tutorial-content .warning-title {
    font-weight: 600;
    margin-bottom: 8px;
}

.tutorial-content .warning p {
    margin-bottom: 0;
    font-size: 14px;
}

.placeholder-message {
    text-align: center;
    padding: 40px 20px;
    border: 2px dashed #dee2e6;
    border-radius: 16px;
    margin: 20px 0;
}

.placeholder-message .icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.placeholder-message h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.placeholder-message p {
    font-size: 14px;
}

/* Tutorial Intro */
.tutorial-intro {
    margin-bottom: 24px;
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #f7931a;
}

.tutorial-intro p {
    font-size: 15px;
    line-height: 1.7;
    margin: 0;
}

/* Tutorial Warning */
.tutorial-warning {
    margin-bottom: 24px;
    padding: 20px;
    border: 2px solid #f59e0b;
    border-radius: 12px;
}

.tutorial-warning h2 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
}

.tutorial-warning p {
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

/* Tutorial Security Note */
.tutorial-note {
    margin-top: 28px;
    padding: 20px;
    border: 2px solid #68d391;
    border-radius: 12px;
}

.tutorial-note h2 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
}

.tutorial-note p {
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

/* Screenshot Gallery */
.screenshot-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.screenshot-item {
    position: relative;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.2s;
}

.screenshot-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-item figcaption {
    padding: 16px;
}

.screenshot-item figcaption h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}

.screenshot-item figcaption p {
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
}

.screenshot-item figcaption strong {
    font-weight: 600;
}

.step-number {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(247, 147, 26, 0.4);
}

/* FAQ Section */
.faq-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    padding: 20px;
    border: 2px solid #e9ecef;
    border-radius: 16px;
}

.faq-item h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.faq-item p {
    font-size: 14px;
    line-height: 1.6;
}

.faq-item a {
    text-decoration: none;
}

.faq-item a:hover {
    text-decoration: underline;
}

.faq-item ul,
.faq-item ol {
    margin-top: 12px;
    padding-left: 24px;
}

.faq-item ol {
    list-style-type: decimal;
}

.faq-item li {
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.6;
}

.faq-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin-top: 16px;
    margin-bottom: 8px;
}

.faq-item code {
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

/* Docs mobile responsive */
@media (max-width: 480px) {
    .tutorial-card {
        padding: 16px;
    }

    .wallet-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }

    .tutorial-card h2 {
        font-size: 16px;
    }

    .tutorial-card p {
        font-size: 13px;
    }

    .screenshot-gallery {
        grid-template-columns: 1fr;
    }

    .step-number {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }
}