/* ============================================================
   Micro-Interactions 微互動效果
   提升使用者體驗的小動畫
   ============================================================ */

/* ============================================================
   按鈕點擊波紋效果
   ============================================================ */

.btn,
.button,
[type="submit"] {
    position: relative;
    overflow: hidden;
}

.btn::after,
.button::after,
[type="submit"]::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s, opacity 0.6s;
    opacity: 0;
}

.btn:active::after,
.button:active::after,
[type="submit"]:active::after {
    width: 300px;
    height: 300px;
    opacity: 0;
    transition: 0s;
}

/* ============================================================
   輸入框聚焦效果
   ============================================================ */

input,
textarea,
select {
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.2s;
}

input:focus,
textarea:focus,
select:focus {
    transform: translateY(-1px);
    box-shadow:
        0 4px 12px rgba(99, 102, 241, 0.15),
        0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 輸入框標籤浮動效果 */
.floating-label {
    position: relative;
}

.floating-label label {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted, #888);
    font-size: 14px;
    pointer-events: none;
    transition: all 0.2s ease;
    background: var(--card, #1a1a2e);
    padding: 0 4px;
}

.floating-label input:focus+label,
.floating-label input:not(:placeholder-shown)+label {
    top: 0;
    font-size: 12px;
    color: var(--primary, #6366f1);
}

/* ============================================================
   卡片懸浮效果
   ============================================================ */

.card,
.feat-card,
[class*="card"] {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover,
.feat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* 卡片內部元素的延遲動畫 */
.card:hover .card-icon,
.card:hover .icon {
    animation: iconBounce 0.5s ease;
}

@keyframes iconBounce {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }
}

/* ============================================================
   連結懸浮效果
   ============================================================ */

a:not(.btn):not(.button) {
    position: relative;
    transition: color 0.2s ease;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary, #6366f1);
    transition: width 0.3s ease;
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

/* ============================================================
   圖片載入效果
   ============================================================ */

img {
    opacity: 0;
    transition: opacity 0.5s ease;
}

img.loaded,
img[src] {
    opacity: 1;
}

/* 圖片懸浮縮放 */
.gallery-item img,
.image-card img {
    transition: transform 0.4s ease, filter 0.4s ease;
}

.gallery-item:hover img,
.image-card:hover img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* ============================================================
   切換開關動畫
   ============================================================ */

.toggle-switch {
    position: relative;
    width: 52px;
    height: 28px;
    background: var(--border, #333);
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.toggle-switch.active {
    background: var(--primary, #6366f1);
}

.toggle-switch.active::after {
    transform: translateX(24px);
}

/* ============================================================
   勾選框動畫
   ============================================================ */

.checkbox-custom {
    position: relative;
    width: 22px;
    height: 22px;
    border: 2px solid var(--border, #333);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.checkbox-custom::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 7px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform 0.2s ease;
}

.checkbox-custom.checked {
    background: var(--primary, #6366f1);
    border-color: var(--primary, #6366f1);
}

.checkbox-custom.checked::after {
    transform: rotate(45deg) scale(1);
}

/* ============================================================
   下拉選單動畫
   ============================================================ */

.dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ============================================================
   數字計數動畫
   ============================================================ */

.count-up {
    transition: transform 0.3s ease;
}

.count-up.changed {
    animation: countPop 0.3s ease;
}

@keyframes countPop {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
        color: var(--primary, #6366f1);
    }

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

/* ============================================================
   成功/錯誤狀態動畫
   ============================================================ */

.success-shake {
    animation: successShake 0.5s ease;
}

@keyframes successShake {

    0%,
    100% {
        transform: translateX(0);
    }

    20% {
        transform: translateX(-5px);
    }

    40% {
        transform: translateX(5px);
    }

    60% {
        transform: translateX(-3px);
    }

    80% {
        transform: translateX(3px);
    }
}

.error-shake {
    animation: errorShake 0.5s ease;
}

@keyframes errorShake {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-8px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(8px);
    }
}

/* ============================================================
   打字效果
   ============================================================ */

.typing-effect::after {
    content: '|';
    animation: blink 1s step-end infinite;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

/* ============================================================
   滾動顯示動畫
   ============================================================ */

.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 依序顯示 */
.stagger-reveal>* {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.stagger-reveal.visible>*:nth-child(1) {
    transition-delay: 0.1s;
    opacity: 1;
    transform: translateY(0);
}

.stagger-reveal.visible>*:nth-child(2) {
    transition-delay: 0.2s;
    opacity: 1;
    transform: translateY(0);
}

.stagger-reveal.visible>*:nth-child(3) {
    transition-delay: 0.3s;
    opacity: 1;
    transform: translateY(0);
}

.stagger-reveal.visible>*:nth-child(4) {
    transition-delay: 0.4s;
    opacity: 1;
    transform: translateY(0);
}

.stagger-reveal.visible>*:nth-child(5) {
    transition-delay: 0.5s;
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
   工具提示動畫
   ============================================================ */

[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    font-size: 12px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
    z-index: 1000;
}

[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-8px);
}

/* ============================================================
   減少動態偏好（無障礙）
   ============================================================ */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}