/* =========================================================
   Magtasy Studio — main stylesheet
   Mobile-first. No frameworks. No resets you do not need.
   (Cleaned & Optimized Version)
========================================================= */

/* --- 1. Tokens & Dark Mode ----------------------------------- */
:root {
	--bone:    #f7f4ef;
	--bone-2:  #fffdf9;
	--ink:     #0f0f0f;
	--ink-2:   #2a2a2a;
	--ash:     #6f6a63;
	--line:    #e6e0d6;
	--radius:  6px;

	--container: 1200px;
	--gutter:    clamp(1.25rem, 4vw, 2.5rem);

	--serif: "Fraunces", Georgia, "Times New Roman", serif;
	--sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

	--ease: cubic-bezier(.16, 1, .3, 1);
}

/* 統一管理深色模式變數 */
[data-theme="dark"] {
	--bone:   #0a0b0f;
	--bone-2: #13151c;
	--ink:    #f2ede4;
	--ink-2:  #d8d1c4;
	--ash:    #8a847b;
	--line:   #2a2826;
}

/* --- 2. Base -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
	scroll-behavior: smooth;
	-webkit-text-size-adjust: 100%;
	scroll-padding-top: 50px;
	transition: background-color .4s ease;
	overflow-x: hidden;
	max-width: 100%;
}

body {
	margin: 0;
	font-family: var(--sans);
	font-size: 16px;
	line-height: 1.65;
	background: var(--bone);
	color: var(--ink);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	text-rendering: optimizeLegibility;
	transition: background-color .4s ease, color .4s ease;
	overflow-x: hidden;
	max-width: 100%;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; }
::selection { background: var(--ink); color: var(--bone); }

/* --- 3. Utility ---------------------------------------------- */
.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: var(--gutter);
}

.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	padding: 0; margin: -1px;
	overflow: hidden; clip: rect(0,0,0,0);
	white-space: nowrap; border: 0;
}

.skip-link {
	position: absolute; left: -9999px; top: 0;
	background: var(--ink); color: var(--bone);
	padding: .75rem 1.25rem; z-index: 999;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* --- 4. Buttons ---------------------------------------------- */
.btn {
	display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
	padding: .85rem 1.5rem; border-radius: 999px;
	font-family: var(--sans); font-size: .88rem; font-weight: 500; letter-spacing: .01em;
	border: 1px solid transparent; cursor: pointer;
	transition: transform .35s var(--ease), background .3s ease, color .3s ease, border-color .3s ease;
	will-change: transform;
}
.btn--solid { background: var(--ink); color: var(--bone); }
.btn--solid:hover { background: var(--ink-2); transform: translateY(-1px); }
.btn--ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--ghost:hover { background: var(--ink); color: var(--bone); transform: translateY(-1px); }

/* --- 5. Header & Nav ----------------------------------------- */
.site-header {
	position: sticky; top: 0; left: 0; width: 100%; z-index: 50;
	background: rgba(247, 244, 239, .82);
	backdrop-filter: saturate(180%) blur(14px);
	-webkit-backdrop-filter: saturate(180%) blur(14px);
	border-bottom: 1px solid transparent;
	transition: border-color .3s ease, background .4s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
[data-theme="dark"] .site-header { background: rgba(10, 11, 15, .82); }

.nav { display: flex; align-items: center; gap: 1.5rem; padding-block: 1rem; }

.brand { font-family: var(--serif); font-size: 1.3rem; font-weight: 400; letter-spacing: -0.01em; }
.brand span { color: var(--ash); font-style: italic; font-weight: 300; }

.nav__panel { margin-left: auto; }

.nav__list { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; font-size: .9rem; }
.nav__list a { position: relative; padding-block: .25rem; }
.nav__list a::after {
	content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px;
	background: currentColor; transform: scaleX(0); transform-origin: right;
	transition: transform .4s var(--ease);
}
.nav__list a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav__cta { padding: .65rem 1.25rem; font-size: .82rem; }
.nav__cta-mobile { display: none; }

.nav__toggle {
	display: inline-flex; flex-direction: column; justify-content: center; align-items: center;
	gap: 6px; width: 40px; height: 40px; padding: 0; border: 0; background: transparent; cursor: pointer;
}
.nav__toggle span:not(.screen-reader-text) {
	display: block; width: 22px; height: 1.5px; background: var(--ink);
	transition: transform .35s var(--ease);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(3.75px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-3.75px) rotate(-45deg); }

@media (min-width: 900px) {
	.nav { gap: 2.5rem; }
	.nav__panel { display: flex; align-items: center; gap: 2.5rem; margin-left: auto; margin-right: 1rem; }
	.nav__toggle { display: none; }
}

@media (max-width: 899px) {
	.nav { position: relative; }
	.nav__cta { display: none; }
	.nav__cta-mobile { display: inline-flex; align-self: flex-start; margin-top: .5rem; }
	.nav__panel {
		position: fixed; top: 65px; left: 0; right: 0; background: var(--bone);
		border-bottom: 1px solid var(--line); padding: 2rem var(--gutter) 2.5rem;
		display: flex; flex-direction: column; gap: 1.75rem;
		transform: translateY(-8px); opacity: 0; visibility: hidden;
		transition: transform .35s var(--ease), opacity .35s ease, visibility .35s;
	}
	.nav__panel.is-open { transform: none; opacity: 1; visibility: visible; }
	.nav__list { flex-direction: column; gap: 1.25rem; font-size: 1.15rem; font-family: var(--serif); font-weight: 400; }
	.theme-toggle { margin-left: auto; }
	.nav__toggle  { margin-left: .5rem; }
}

/* --- 6. Section shell ---------------------------------------- */
.section { padding-block: clamp(4rem, 10vw, 7.5rem); border-top: 1px solid var(--line); }
.section:first-of-type { border-top: 0; }
.section__head { display: grid; gap: 1rem; margin-bottom: clamp(2.5rem, 6vw, 4rem); max-width: 720px; }
.section__label { font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--ash); margin: 0; }
.section__title { font-family: var(--serif); font-weight: 300; font-size: clamp(1.85rem, 4.2vw, 3rem); line-height: 1.15; letter-spacing: -0.015em; }
.section__sub { color: var(--ash); margin: 0; max-width: 560px; }

/* --- 7. Hero -------------------------------------------------- */
.hero {
	min-height: 100vh; display: flex; align-items: center; position: relative;
}
/* Hero 專屬耀光 */
[data-theme="dark"] .hero::before {
	content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
	width: 150%; height: 100%;
	background: radial-gradient(ellipse at top, rgba(100, 180, 255, 0.15) 0%, transparent 60%);
	pointer-events: none; z-index: -1;
}

.hero__grid { display: grid; gap: 3rem; align-items: center; width: 100%; }
@media (min-width: 900px) { .hero__grid { grid-template-columns: 1.4fr 1fr; gap: 4rem; } }

.hero__kicker { font-size: .75rem; letter-spacing: .18em; text-transform: uppercase; color: var(--ash); margin: 0 0 1.75rem; }
.hero__title { font-family: var(--serif); font-weight: 300; font-size: clamp(2.4rem, 7vw, 5rem); line-height: 1.05; letter-spacing: -0.025em; margin: 0 0 1.75rem; }
.hero__sub { font-size: clamp(1rem, 1.6vw, 1.18rem); color: var(--ink-2); max-width: 560px; margin: 0 0 2.5rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .75rem; }

/* --- 8. About ------------------------------------------------- */
.about { display: grid; gap: 2.5rem; }
@media (min-width: 900px) { .about { grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; } }
.about__head .section__title { margin: 0; }
.about__body p { margin: 0 0 2rem; font-size: 1.02rem; color: var(--ink-2); }
.about__baseline { display: grid; grid-template-columns: repeat(2, 1fr); gap: .75rem 1.5rem; list-style: none; margin: 0; padding: 1.5rem 0 0; border-top: 1px solid var(--line); font-size: .85rem; }
.about__baseline li { color: var(--ash); }
.about__baseline strong { display: block; color: var(--ink); font-weight: 500; margin-bottom: .15rem; }

/* --- 9. Portfolio ------------------------------------------- */
.work-grid { display: grid; grid-template-columns: 1fr; gap: 2.5rem; }
@media (min-width: 768px) { .work-grid { grid-template-columns: repeat(2, 1fr); gap: 3.5rem 2rem; } }

.work-card { transition: transform .5s var(--ease); }
.work-card:hover { transform: translateY(-6px); }

.work-card__link { display: block; }
.work-card__media { overflow: hidden; background: #eae4d8; aspect-ratio: 16 / 11; border-radius: var(--radius); }
.work-card__img { width: 100%; height: 100%; object-fit: cover; transition: transform .9s var(--ease); will-change: transform; }
.work-card__link:hover .work-card__img { transform: scale(1.035); }
.work-card__placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #eae4d8 0%, #ddd5c5 100%); }
.work-card__body { padding-top: 1.25rem; }
.work-card__meta { display: flex; flex-wrap: wrap; gap: .5rem; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ash); margin: 0 0 .65rem; }
.work-card__title { font-family: var(--serif); font-weight: 400; font-size: clamp(1.25rem, 2.4vw, 1.55rem); letter-spacing: -0.01em; margin: 0 0 .5rem; }
.work-card__result { color: var(--ash); font-size: .92rem; margin: 0 0 1rem; }
.work-card__cta { display: inline-block; font-size: .85rem; font-weight: 500; border-bottom: 1px solid currentColor; padding-bottom: 2px; transition: opacity .3s ease; }
.work-card__link:hover .work-card__cta { opacity: .65; }

/* --- 10. Services (Plans) ----------------------------------- */
.plans {
	display: grid;
	grid-template-columns: 1fr;
	gap: 1.5rem;
}
@media (min-width: 900px) {
	.plans { 
		grid-template-columns: repeat(3, 1fr); 
		gap: 1.5rem;
	}
}

/* 基礎卡片 */
.plan {
	display: flex;
	flex-direction: column;
	gap: 1.5rem;
	padding: clamp(1.75rem, 3vw, 2.5rem);
	border: 1px solid transparent;
	border-radius: var(--radius);
	position: relative;
	background: transparent;
	isolation: isolate; 
	z-index: 1;
	transition: transform .25s ease-out, box-shadow .25s ease-out;
}

/* 預設 01 卡片 Hover */
.plan:hover {
	transform: translateY(-6px);
	box-shadow: 0 18px 40px -22px rgba(15, 15, 15, .28);
	transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}

/* 高級耀光邊框 */
.plan::before {
	content: "";
	position: absolute;
	inset: -1px;
	z-index: -2;
	border-radius: inherit;
	background: linear-gradient(135deg, var(--line), transparent 80%);
	transition: background 0.4s ease;
}

/* 01 卡片背景 */
.plan::after {
	content: "";
	position: absolute;
	inset: 0;
	z-index: -1;
	border-radius: inherit;
	background: var(--bone-2);
	transition: background-color .4s ease, box-shadow .4s ease;
}

.plan:hover::before {
	background: linear-gradient(135deg, var(--ink-2), var(--ash) 80%);
}

/* ==========================================
   深色模式 (Dark Mode) 對比度調整
   ========================================== */
[data-theme="dark"] .plan::before {
	background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), transparent 80%);
}
[data-theme="dark"] .plan::after {
	background: #15171e; /* 01 維持深藍灰 */
}
[data-theme="dark"] .plan:hover::before {
	background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), transparent 80%);
}
[data-theme="dark"] .plan:hover {
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9), 0 0 20px rgba(255, 255, 255, 0.03);
}

/* ==========================================
   02 主推卡片 (Standard Bespoke) - 深海軍藍
   ========================================== */

/* 淺色模式 */
.plan--featured::after {
	background: #0f172a !important; /* 深藍 */
}
.plan--featured::before {
	background: linear-gradient(135deg, #cbd5e1 0%, #475569 50%, #cbd5e1 100%) !important; /* 銀灰藍耀光 */
}
.plan--featured, .plan--featured * { color: #f8fafc !important; }
.plan--featured .plan__tag, 
.plan--featured .plan__desc, 
.plan--featured .plan__price small,
.plan--featured .plan__features li::before { color: #94a3b8 !important; }
.plan--featured .plan__cta {
	background-color: #e2e8f0 !important;
	color: #0f172a !important;
	border-color: #e2e8f0 !important;
}
.plan--featured .plan__cta:hover { background-color: #cbd5e1 !important; }
.plan--featured:hover {
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9), 0 0 35px rgba(148, 163, 184, 0.2);
}

/* 深色模式微調：提高明度，避免與背景融合 */
[data-theme="dark"] .plan--featured::after {
	background: #1e293b !important; /* 午夜藍 */
}
[data-theme="dark"] .plan--featured:hover {
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9), 0 0 45px rgba(148, 163, 184, 0.3);
}

/* ==========================================
   03 高級動態方案 (Advanced Custom) - 墨綠與香檳金
   ========================================== */

/* 淺色模式 */
.plan--advanced::after {
	background: #0d1e16 !important; /* 深邃墨綠 */
}
.plan--advanced::before {
	background: linear-gradient(135deg, #d4af37 0%, #5c4a1a 50%, #d4af37 100%) !important; /* 香檳金耀光 */
}
.plan--advanced, .plan--advanced * { color: #f7f4ef !important; }
.plan--advanced .plan__tag, 
.plan--advanced .plan__desc, 
.plan--advanced .plan__price small { color: #8ba395 !important; }
.plan--advanced .plan__features li::before { color: #d4af37 !important; }
.plan--advanced .plan__cta {
	background-color: #d4af37 !important;
	color: #0d1e16 !important;
	border-color: #d4af37 !important;
	font-weight: 600;
}
.plan--advanced .plan__cta:hover {
	background-color: #fceabb !important;
	color: #0d1e16 !important;
}
.plan--advanced:hover {
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9), 0 0 35px rgba(212, 175, 55, 0.25);
}

/* 深色模式微調：加入一點環境綠光 */
[data-theme="dark"] .plan--advanced::after {
	background: #0f2a1f !important; /* 翡翠深綠 */
}
[data-theme="dark"] .plan--advanced::before {
	background: linear-gradient(135deg, #fceabb 0%, #d4af37 50%, #fceabb 100%) !important;
}
[data-theme="dark"] .plan--advanced:hover {
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9), 0 0 45px rgba(212, 175, 55, 0.4);
}


/* ------------------------------------------
   深色模式 (Dark Mode) 專屬微調
   ------------------------------------------ */
[data-theme="dark"] .plan--advanced::after {
	background: #09120e !important; /* 深色模式下更深的黑綠 */
}

/* 深色模式下維持香檳金耀光 */
[data-theme="dark"] .plan--advanced::before {
	background: linear-gradient(135deg, #fceabb 0%, #d4af37 50%, #fceabb 100%) !important;
}

/* 深色模式 Hover 時的強烈金光 */
[data-theme="dark"] .plan--advanced:hover {
	box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9), 0 0 45px rgba(212, 175, 55, 0.4);
}

/* 卡片內部排版（維持不變） */
.plan__tag { font-size: .7rem; letter-spacing: .18em; text-transform: uppercase; color: var(--ash); margin: 0 0 .75rem; }
.plan__name { font-family: var(--serif); font-weight: 400; font-size: 1.55rem; margin: 0 0 .5rem; letter-spacing: -0.01em; }
.plan__price { font-family: var(--serif); font-size: 2.2rem; font-weight: 300; letter-spacing: -0.02em; margin: 0; }
.plan__price small { font-family: var(--sans); font-size: .8rem; font-weight: 400; color: var(--ash); margin-left: .25rem; }
.plan__desc { margin: 0; color: var(--ash); font-size: .95rem; }
.plan__features { list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; font-size: .92rem; }
.plan__features li { display: flex; gap: .6rem; color: var(--ink-2); }
.plan__features li::before { content: "→"; color: var(--ash); flex-shrink: 0; }
.plan__cta { margin-top: auto; align-self: flex-start; transition: background-color 0.3s ease, color 0.3s ease; }

/* --- 11. Support -------------------------------------------- */
.support-grid { 
	display: grid; 
	grid-template-columns: 1fr; 
	gap: 1.5rem; /* 手機版間隔稍微加大 */
}

@media (min-width: 768px) { 
	.support-grid { 
		grid-template-columns: repeat(3, 1fr); 
		gap: 2.5rem; /* 桌面版把間隔拉大到 40px (2.5rem) */
	} 
}

.support { 
	padding: 1.75rem; 
	border: 1px solid var(--line); 
	border-radius: var(--radius); 
	/* 加一點微弱的背景色，讓卡片更有實體感 */
	background: var(--bone-2);
	/* 加上微弱的過渡與 hover 陰影，讓卡片更有層次 */
	transition: transform .3s ease, box-shadow .3s ease;
}

.support:hover {
	transform: translateY(-4px);
	box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .support {
	background: var(--bone-2); /* 深色模式下確保有實體背景 */
}
[data-theme="dark"] .support:hover {
	box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.5);
}

.support h3 { 
	font-family: var(--serif); 
	font-weight: 400; 
	font-size: 1.25rem; 
	margin: 0 0 1.25rem; 
	letter-spacing: -0.01em; 
}

.support dl { 
	margin: 0; 
	display: grid; 
	gap: 1rem; 
	font-size: .9rem; 
}

.support dt { 
	font-size: .7rem; 
	letter-spacing: .14em; 
	text-transform: uppercase; 
	color: var(--ash); 
	margin-bottom: .15rem; 
}

.support dd { 
	margin: 0; 
	color: var(--ink-2); 
}

/* --- 12. Contact -------------------------------------------- */
.section--contact { padding-block: clamp(5rem, 12vw, 9rem); }
.contact__inner { max-width: 820px; }
.contact__title { font-family: var(--serif); font-weight: 300; font-size: clamp(2rem, 5.5vw, 3.6rem); line-height: 1.1; letter-spacing: -0.02em; margin: 1rem 0 2.5rem; }
.contact__links { display: flex; flex-wrap: wrap; gap: .75rem; }
.contact__link { display: inline-flex; align-items: center; gap: .5rem; padding: .95rem 1.5rem; border: 1px solid var(--line); border-radius: 999px; font-size: .88rem; font-weight: 500; transition: border-color .3s ease, background .3s ease, color .3s ease; }
.contact__link:hover { border-color: var(--ink); background: var(--bone-2); }
.contact__link--primary { background: var(--ink); color: var(--bone); border-color: var(--ink); }
.contact__link--primary:hover { background: var(--ink-2); color: var(--bone); }

/* --- 13. Footer --------------------------------------------- */
.site-footer { border-top: 1px solid var(--line); padding-block: 2.5rem; font-size: .82rem; color: var(--ash); }
.site-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; }
.site-footer p { margin: 0; }
.site-footer__links { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; }
.site-footer__links a { transition: color .3s ease; }
.site-footer__links a:hover { color: var(--ink); }

/* --- 14. Animations & Interactivity ------------------------- */
/* Reveal */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); will-change: opacity, transform; }
[data-reveal].is-visible { opacity: 1; transform: none; will-change: auto; }
[data-reveal]:nth-child(2) { transition-delay: .06s; }
[data-reveal]:nth-child(3) { transition-delay: .12s; }
[data-reveal]:nth-child(4) { transition-delay: .18s; }

/* 延遲陣列 (Stagger) */
.work-grid > [data-reveal]:nth-child(2), .plans > [data-reveal]:nth-child(2), .support-grid > [data-reveal]:nth-child(2) { transition-delay: .1s; }
.work-grid > [data-reveal]:nth-child(3), .plans > [data-reveal]:nth-child(3), .support-grid > [data-reveal]:nth-child(3) { transition-delay: .2s; }
.work-grid > [data-reveal]:nth-child(4) { transition-delay: .3s; }
.work-grid > [data-reveal]:nth-child(5) { transition-delay: .4s; }
.work-grid > [data-reveal]:nth-child(6) { transition-delay: .5s; }

/* Split-text headline reveal */
[data-split-text] .word { display: inline-block; overflow: hidden; vertical-align: top; }
[data-split-text] .char { display: inline-block; transform: translateY(105%); transition: transform .9s var(--ease); will-change: transform; }
[data-split-text].is-visible .char { transform: translateY(0); }

/* 3D Mark */
.hero__mark { display: flex; justify-content: center; align-items: center; perspective: 1200px; min-height: 260px; transform: translateY(-20px); }
.mark-3d { position: relative; width: 180px; height: 180px; transform-style: preserve-3d; animation: markSpin 14s linear infinite; will-change: transform; }

/* 方塊的六個面 */
.mark-3d__face {
	position: absolute; inset: 0;
	display: flex; justify-content: center; align-items: center;
	/* 加入微弱的漸層，讓白面有受光的立體感 */
	background: linear-gradient(135deg, var(--bone-2) 0%, #e8e5df 100%);
	border: 1px solid var(--line); 
	border-radius: 4px; 
	backface-visibility: hidden;
	overflow: hidden; 
}

/* 深色模式的方塊面漸層 */
[data-theme="dark"] .mark-3d__face {
	background: linear-gradient(135deg, #1f222b 0%, #13151c 100%);
	border-color: rgba(255, 255, 255, 0.1);
}

/* 限制 LOGO 圖片在方塊內的尺寸 */
.mark-3d__face img {
	width: 50%;
	height: 50%;
	object-fit: contain; 
	
	/* 如果你的 LOGO 還是有黑底，可以加上這行讓邊緣柔和一點 */
	border-radius: 4px; 
	
	filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1)); 
}

/* 如果你的 Logo 原圖是黑色的，在深色模式下自動反白 */
[data-theme="dark"] .mark-3d__face img {
	filter: invert(1) brightness(1.5) drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

/* 六個面的 3D 定位（維持不變） */
.mark-3d__face--front  { transform: rotateY(  0deg) translateZ(90px); }
.mark-3d__face--back   { transform: rotateY(180deg) translateZ(90px); }
.mark-3d__face--right  { transform: rotateY( 90deg) translateZ(90px); }
.mark-3d__face--left   { transform: rotateY(-90deg) translateZ(90px); }
.mark-3d__face--top    { transform: rotateX( 90deg) translateZ(90px); }
.mark-3d__face--bottom { transform: rotateX(-90deg) translateZ(90px); }

@keyframes markSpin { 0% { transform: rotateX(-18deg) rotateY(0deg); } 100% { transform: rotateX(-18deg) rotateY(360deg); } }
/* 編號 (01, 02) */
.plan__num, .support__num { display: block; font-family: var(--serif); font-size: 2.2rem; font-weight: 300; line-height: 1; color: var(--ash); letter-spacing: -0.03em; margin-bottom: .75rem; }

/* Theme Toggle Button */
.theme-toggle { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer; transition: border-color .3s ease, transform .3s var(--ease); }
.theme-toggle:hover { border-color: var(--ink); transform: rotate(15deg); }
.theme-toggle__icon { display: none; }
[data-theme="light"] .theme-toggle__icon--moon { display: block; }
[data-theme="dark"]  .theme-toggle__icon--sun  { display: block; }

/* --- 15. Scientific Aurora Background ----------------------- */
body::before, body::after { content: ""; position: fixed; inset: -10%; pointer-events: none; z-index: -1; opacity: 0; transition: opacity 0.8s ease; }
[data-theme="dark"] body::before, [data-theme="dark"] body::after { opacity: 1; }

/* 科學網格 */
body::before {
	background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
	background-size: 50px 50px; background-position: center top;
	-webkit-mask-image: radial-gradient(circle at 50% 30%, black 20%, transparent 70%);
	mask-image: radial-gradient(circle at 50% 30%, black 20%, transparent 70%);
}

/* 極光微光 */
body::after {
	background: radial-gradient(circle at 20% 20%, rgba(80, 150, 255, 0.3) 0%, transparent 50%), radial-gradient(circle at 80% 60%, rgba(200, 80, 255, 0.25) 0%, transparent 50%), radial-gradient(circle at 50% 100%, rgba(80, 255, 200, 0.15) 0%, transparent 50%);
	animation: auroraShift 6s ease-in-out infinite alternate; will-change: transform, opacity;
}
@keyframes auroraShift { 0% { transform: scale(1) translate(0, 0) rotate(0deg); opacity: 0.8; } 100% { transform: scale(1.3) translate(5%, -5%) rotate(5deg); opacity: 1; } }

/* --- 16. Accessibility & Fallbacks -------------------------- */
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	[data-reveal], [data-split-text] .char, .work-card, .plan {
		opacity: 1 !important; transform: none !important; transition: none !important;
	}
	.work-card:hover, .plan:hover { transform: none; box-shadow: none; }
	.mark-3d { animation: none; transform: rotateX(-18deg) rotateY(22deg); }
	*, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 2px; }

/* --- 17. Basic content (fallback pages) -------------------- */
.entry { padding-block: clamp(3rem, 8vw, 6rem); }
.entry__content > * + * { margin-top: 1.25rem; }
.entry__content p { color: var(--ink-2); }

/* =========================================================
   18. 3D Isometric Showcase (修復邊界裁切版)
========================================================= */
.section--showcase {
	position: relative;
	background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.02), transparent);
	padding-block: clamp(4rem, 10vw, 7.5rem); /* 確保上下有足夠空間 */
}
[data-theme="dark"] .section--showcase {
	background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.02), transparent);
}

.showcase-container {
	display: grid;
	grid-template-columns: 1fr;
	gap: 4rem;
	align-items: center;
}

@media (min-width: 900px) {
	.showcase-container {
		grid-template-columns: 1fr 1.2fr;
		gap: 4rem;
	}
}

/* 3D 容器設定 */
.showcase-3d-wrapper {
	perspective: 2000px;
	width: 100%;
	display: flex;
	justify-content: center;
	/* 給予充足的 padding，避免旋轉時切到邊緣 */
	padding: 4rem 2rem; 
	position: relative;
	/* 移除 overflow: hidden，讓 3D 可以完整展現 */
}

.showcase-3d {
	position: relative;
	width: 100%;
	max-width: 580px; /* 稍微縮小寬度，確保旋轉與外殼不會超出畫面 */
	transform: rotateX(12deg) rotateY(-20deg) rotateZ(6deg);
	transform-style: preserve-3d;
	transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.showcase-3d-wrapper:hover .showcase-3d {
	transform: rotateX(5deg) rotateY(-10deg) rotateZ(3deg) scale(1.02);
}

/* --- 1. Mac 螢幕外框 --- */
.mockup-mac {
	position: relative;
	width: 100%;
	background: #e2e2e2;
	padding: 12px 12px 24px;
	border-radius: 16px;
	box-shadow: 
		-20px 30px 60px rgba(0,0,0,0.15), 
		inset 0 0 0 1px rgba(255,255,255,0.5);
	transform: translateZ(0);
}

.mockup-mac__screen {
	background: #000;
	border-radius: 8px;
	overflow: hidden;
	aspect-ratio: 16 / 10;
	position: relative;
}

/* Mac 底部實體底座 */
.mockup-mac__base {
	position: absolute;
	bottom: -12px;
	left: -5%;
	width: 110%;
	height: 12px;
	background: linear-gradient(to bottom, #d1d1d1, #a0a0a0);
	border-radius: 0 0 12px 12px;
	box-shadow: 0 15px 25px rgba(0,0,0,0.2);
	transform: rotateX(85deg);
	transform-origin: top center;
}

/* --- 2. 手機外框 --- */
.mockup-phone {
	position: absolute;
	bottom: -30px;
	right: -5%; /* 從 -8% 調整為 -5% */
	width: 26%;
	min-width: 150px;
	background: #111;
	padding: 8px;
	border-radius: 28px;
	box-shadow: 
		-15px 20px 40px rgba(0,0,0,0.3), 
		inset 0 0 0 1px rgba(255,255,255,0.2);
	transform: translateZ(100px) rotateY(5deg) rotateZ(-5deg);
	transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.showcase-3d-wrapper:hover .mockup-phone {
	transform: translateZ(140px) rotateY(0deg) rotateZ(0deg);
}

/* 手機瀏海 */
.mockup-phone__notch {
	position: absolute;
	top: 12px;
	left: 50%;
	transform: translateX(-50%);
	width: 40%;
	height: 16px;
	background: #111;
	border-radius: 20px;
	z-index: 10;
}

.mockup-phone__screen {
	background: #fff;
	border-radius: 20px;
	overflow: hidden;
	aspect-ratio: 9 / 19.5;
}

/* 螢幕反光 */
.mockup-mac__screen::after,
.mockup-phone__screen::after {
	content: "";
	position: absolute;
	inset: 0;
	z-index: 10;
	pointer-events: none;
	background: linear-gradient(
		105deg, 
		rgba(255, 255, 255, 0.15) 0%, 
		rgba(255, 255, 255, 0.05) 40%, 
		transparent 40.1%
	);
	border-radius: inherit;
	opacity: 0.8;
	transition: opacity 0.3s ease, transform 0.8s ease;
}
.showcase-3d-wrapper:hover .mockup-mac__screen::after,
.showcase-3d-wrapper:hover .mockup-phone__screen::after {
	opacity: 1;
	transform: translateX(5px);
}

/* 底部陰影 */
.showcase-3d-wrapper::before {
	content: "";
	position: absolute;
	bottom: 2rem; /* 配合 padding 調整位置 */
	left: 50%;
	transform: translateX(-50%) rotateX(80deg);
	width: 50%;
	height: 50px;
	background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.3) 0%, transparent 70%);
	z-index: -1;
	transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-theme="dark"] .showcase-3d-wrapper::before {
	background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
}
.showcase-3d-wrapper:hover::before {
	width: 60%;
	opacity: 0.8;
	filter: blur(10px);
}

/* --- 3. 輪播圖片設定 --- */
.carousel-track {
	position: relative;
	width: 100%;
	height: 100%;
	background: #111; 
}

.carousel-track img {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: contain; 
	padding: 2%; 
	filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.3));
	opacity: 0;
	transform: scale(1.02);
	transition: opacity 0.8s ease, transform 1.2s ease;
	z-index: 1;
}

.carousel-track img.active {
	opacity: 1;
	transform: scale(1);
	z-index: 2;
}

[data-theme="light"] .carousel-track {
	background: #f0f0f0;
}
[data-theme="light"] .carousel-track img {
	filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.1));
}

/* --- 4. 深色模式微調 --- */
[data-theme="dark"] .mockup-mac { background: #333; }
[data-theme="dark"] .mockup-mac__base { background: linear-gradient(to bottom, #222, #111); }
[data-theme="dark"] .mockup-phone { background: #000; }