/**
 * Shared "保持聯繫" subscribe section — layout, form, expansion, and success states.
 * Used on index.html and events.html via components/shared-subscribe-section.js.
 * Edit this file to update both pages' subscribe section at once.
 */

.subscribe {
    padding: var(--space-4xl) 5vw;
    background: var(--color-peach-light);
}

.subscribe-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.subscribe .section-title {
    margin-bottom: var(--space-md);
}

.subscribe-desc {
    margin-bottom: var(--space-xl);
    color: var(--color-text-secondary);
    font-size: var(--home-font-body-lg);
    line-height: 1.7;
}

.subscribe-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.subscribe-row {
    display: flex;
    gap: var(--space-md);
}

.subscribe-form .input-group {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    text-align: left;
}

.subscribe-form .input-group label {
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: var(--home-font-ui-sm);
    font-weight: 600;
}

.subscribe-form .input-group input {
    width: 100%;
    padding: 14px 22px;
    border: 1.5px solid rgba(71, 45, 48, 0.15);
    border-radius: var(--radius-pill);
    background: var(--color-white);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: var(--home-font-body-md);
    transition: border-color var(--duration-fast) var(--ease-out-expo), box-shadow var(--duration-fast) var(--ease-out-expo);
}

.subscribe-form .input-group input::placeholder {
    color: rgba(71, 45, 48, 0.4);
}

.subscribe-form .input-group input:focus {
    outline: none;
    border-color: var(--color-coral);
    box-shadow: var(--shadow-focus);
}

.subscribe-form .btn-primary {
    align-self: center;
    min-width: 200px;
    justify-content: center;
}

/* -- Inline Expansion Container -- */
.subscription-inline {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition: max-height 400ms var(--ease-out-expo),
        opacity 300ms var(--ease-out-quart),
        margin-top 400ms var(--ease-out-expo);
}

.subscription-inline.expanding {
    opacity: 1;
    margin-top: var(--space-lg);
}

.subscription-inline.expanded {
    max-height: none;
    overflow: visible;
    opacity: 1;
    margin-top: var(--space-lg);
}

.subscription-inline.collapsing {
    opacity: 0;
    margin-top: 0;
    transition: max-height 300ms var(--ease-out-expo),
        opacity 200ms var(--ease-out-quart),
        margin-top 300ms var(--ease-out-expo);
}

.subscription-inline[aria-hidden="true"] {
    display: none;
}

.subscription-inline[aria-hidden="false"] {
    display: block;
}

.subscription-inline-heading {
    font-family: var(--font-serif);
    font-size: var(--font-h3);
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--space-xs);
}

.subscription-inline-subtext {
    font-size: var(--font-body-sm);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-lg);
}

/* -- Selectable Category Cards -- */
.subscription-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.subscription-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-md);
    border: 1.5px solid rgba(71, 45, 48, 0.12);
    border-radius: var(--radius-lg);
    background: var(--color-white);
    cursor: pointer;
    text-align: center;
    position: relative;
    transition: border-color 200ms var(--ease-out-quart),
        background 200ms var(--ease-out-quart),
        transform 200ms var(--ease-out-quart);
}

.subscription-card:hover {
    border-color: var(--color-coral);
}

.subscription-card.selected {
    border-color: var(--color-coral);
    background: var(--color-coral-light);
}

.subscription-card:focus-visible {
    outline: 3px solid var(--color-coral-light);
    outline-offset: 3px;
}

.subscription-card:active {
    transform: scale(0.96);
}

.subscription-card.bounce {
    animation: subscription-card-bounce 300ms var(--ease-out-quart);
}

@keyframes subscription-card-bounce {
    0% { transform: scale(0.96); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

/* Card check indicator */
.subscription-card-check {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: background 200ms var(--ease-out-quart),
        opacity 200ms var(--ease-out-quart);
}

.subscription-card.selected .subscription-card-check {
    background: var(--color-coral);
    opacity: 1;
}

/* Card icon */
.subscription-card-icon {
    width: 36px;
    height: 36px;
    color: var(--color-text-secondary);
    transition: color 200ms var(--ease-out-quart);
}

.subscription-card.selected .subscription-card-icon {
    color: var(--color-coral);
}

.subscription-card:hover .subscription-card-icon {
    color: var(--color-coral);
}

/* Card label */
.subscription-card-label {
    font-family: var(--font-sans);
    font-size: var(--font-body-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.3;
    white-space: normal;
}

.subscription-card-subtext {
    font-family: var(--font-sans);
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
    line-height: 1.4;
    text-align: center;
}

/* -- Mandatory Category Banner -- */
.subscription-mandatory-note {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-sage-light);
    border-radius: var(--radius-md);
    margin-top: var(--space-sm);
}

.subscription-mandatory-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--color-text-secondary);
}

.subscription-mandatory-text {
    font-family: var(--font-sans);
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* -- Confirm Button + Ripple -- */
.subscription-confirm-btn {
    display: block;
    margin: var(--space-lg) auto 0;
    min-width: 200px;
    position: relative;
    overflow: hidden;
}

.subscription-confirm-btn::after {
    content: '';
    position: absolute;
    top: var(--ripple-y, 50%);
    left: var(--ripple-x, 50%);
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.subscription-confirm-btn.rippling::after {
    animation: subscription-ripple 500ms var(--ease-out-expo) forwards;
}

@keyframes subscription-ripple {
    to {
        width: 400px;
        height: 400px;
        opacity: 0;
    }
}

/* -- Submit button animated hide -- */
.subscribe-submit-btn {
    transition: opacity 250ms var(--ease-out-quart), transform 250ms var(--ease-out-quart);
}

.subscribe-submit-btn.hiding {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
}

.subscribe-submit-btn.hidden {
    display: none;
}

/* -- Success Message -- */
.subscription-success {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: var(--space-xl) 0;
    display: none;
}

.subscription-success::before {
    content: '';
    display: block;
    width: min(220px, 56vw);
    height: 4px;
    margin: 0 auto var(--space-lg);
    border-radius: 999px;
    background: linear-gradient(90deg, #0fb58f 0%, #88d33d 58%, #f2c98c 100%);
    background-size: 200% 100%;
    box-shadow: 0 0 18px color-mix(in srgb, var(--color-sage) 34%, transparent);
    transform: scaleX(0);
    transform-origin: left center;
}

.subscription-success::after {
    content: '✦';
    position: absolute;
    top: var(--space-xl);
    left: calc(50% + min(110px, 28vw));
    color: #f2c98c;
    font-size: 0.9rem;
    line-height: 1;
    opacity: 0;
    pointer-events: none;
}

.subscription-success.visible {
    display: block;
    animation: subscription-fade-in 500ms var(--ease-out-expo) both;
}

.subscription-success.visible::before {
    animation: subscription-success-line 620ms var(--ease-out-expo) 120ms both;
}

.subscription-success.visible::after {
    animation: subscription-line-sparkle 900ms var(--ease-out-expo) 360ms both;
}

/* Checkmark icon */
.subscription-success-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-md);
    border-radius: 50%;
    background: var(--color-coral);
    display: flex;
    align-items: center;
    justify-content: center;
}

.subscription-success.visible .subscription-success-icon {
    animation: subscription-scale-in 400ms var(--ease-out-expo) both;
}

.subscription-success-checkpath {
    stroke-dasharray: 28;
    stroke-dashoffset: 28;
}

.subscription-success.visible .subscription-success-checkpath {
    animation: subscription-check-draw 400ms var(--ease-out-quart) 450ms forwards;
}

/* Title — stagger delay 300ms */
.subscription-success-title {
    font-family: var(--font-serif);
    font-size: var(--font-h3);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    opacity: 0;
}

.subscription-success.visible .subscription-success-title {
    animation: subscription-text-in 400ms var(--ease-out-quart) 350ms both;
}

/* Echoed email — stagger delay 450ms */
.subscription-success-email {
    font-family: var(--font-sans);
    font-size: var(--font-body-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    opacity: 0;
}

.subscription-success.visible .subscription-success-email {
    animation: subscription-text-in 400ms var(--ease-out-quart) 500ms both;
}

/* Receipt block — stagger delay 600ms */
.subscription-success-receipt {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-width: 340px;
    margin: 0 auto var(--space-md);
    padding: var(--space-md);
    background: var(--color-sage-light);
    border-radius: var(--radius-md);
    text-align: left;
    opacity: 0;
}

.subscription-success.visible .subscription-success-receipt {
    animation: subscription-text-in 400ms var(--ease-out-quart) 650ms both;
}

.subscription-success-row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.subscription-success-row-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.subscription-success-row-label {
    font-family: var(--font-sans);
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* "What happens next" line — stagger delay 750ms */
.subscription-success-next {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: var(--font-sans);
    font-size: var(--font-xs);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    opacity: 0;
}

.subscription-success.visible .subscription-success-next {
    animation: subscription-text-in 400ms var(--ease-out-quart) 800ms both;
}

.subscription-success-next-icon {
    flex-shrink: 0;
    color: var(--color-coral);
}

/* Demo note */
.subscription-success-demo-note {
    font-family: var(--font-sans);
    font-size: var(--font-xs);
    color: rgba(71, 45, 48, 0.35);
    opacity: 0;
}

.subscription-success.visible .subscription-success-demo-note {
    animation: subscription-text-in 300ms var(--ease-out-quart) 1000ms both;
}

/* -- Form de-emphasis during success -- */
.subscribe-form.de-emphasized {
    opacity: 0.35;
    pointer-events: none;
    transition: opacity 400ms var(--ease-out-quart);
}

/* -- Keyframes -- */
@keyframes subscription-fade-in {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes subscription-text-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes subscription-scale-in {
    from { transform: scale(0); }
    to { transform: scale(1); }
}

@keyframes subscription-check-draw {
    to { stroke-dashoffset: 0; }
}

@keyframes subscription-success-line {
    from { background-position: 100% 0; transform: scaleX(0); }
    to { background-position: 0 0; transform: scaleX(1); }
}

@keyframes subscription-line-sparkle {
    0%, 100% { opacity: 0; transform: scale(0.65) rotate(-12deg); }
    45% { opacity: 1; transform: scale(1.15) rotate(8deg); }
}

/* -- Reduced Motion -- */
@media (prefers-reduced-motion: reduce) {
    .subscription-inline,
    .subscription-inline.collapsing {
        transition: none;
    }

    .subscription-card {
        transition: none;
    }

    .subscription-card:active {
        transform: none;
    }

    .subscription-card.bounce {
        animation: none;
    }

    .subscribe-submit-btn {
        transition: none;
    }

    .subscription-success {
        transition: none;
    }

    .subscription-success.visible,
    .subscription-success.visible .subscription-success-icon,
    .subscription-success.visible::before,
    .subscription-success.visible .subscription-success-checkpath,
    .subscription-success.visible .subscription-success-title,
    .subscription-success.visible .subscription-success-email,
    .subscription-success.visible .subscription-success-receipt,
    .subscription-success.visible .subscription-success-next,
    .subscription-success.visible .subscription-success-demo-note {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .subscription-success.visible::after {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .subscription-success.visible .subscription-success-checkpath {
        stroke-dashoffset: 0;
    }

    .subscription-confirm-btn.rippling::after {
        animation: none;
    }
}

/* -- Responsive: Cards + Form Row -- */
@media (max-width: 768px) {
    .subscription-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .subscription-card {
        padding: var(--space-md) var(--space-sm);
    }
}

@media (max-width: 767px) {
    .subscribe {
        padding: var(--space-3xl) 20px;
    }

    .subscribe-row {
        flex-direction: column;
    }
}

@media (max-width: 430px) {
    .subscribe {
        padding-right: 16px;
        padding-left: 16px;
    }

    .subscription-cards {
        grid-template-columns: 1fr;
    }

    .subscribe-form .btn-primary,
    .subscription-confirm-btn,
    .subscription-back-btn {
        width: 100%;
        min-width: 0;
    }
}

@media (max-width: 400px) {
    .subscribe-form .input-group input {
        padding-right: 18px;
        padding-left: 18px;
    }
}