/* ===== Warna dan tema ===== */
:root {
    --bg: #F4F8FF;
    --ink: #12264D;
    --muted: #506690;
    --brand: #3B6FE0;
    --brand-deep: #2A54B8;
    --soft: #E4EEFF;
    --line: #D9E5F8;
    --card: rgba(255, 255, 255, .72);
    --glass-line: rgba(255, 255, 255, .95);
    --btn: #3B6FE0;
    --btn-hover: #2A54B8;
    --btn-text: #FFFFFF;
    --blob1: #BFDBFE;
    --blob2: #C7D2FE;
    --blob3: #A5F3FC;
    --shadow: rgba(42, 84, 184, .35);
}

:root {
    color-scheme: light dark;
}

/* Gelap: dipilih manual lewat tombol */
:root[data-theme="dark"] {
    --bg: #0A1430;
    --ink: #E8EFFF;
    --muted: #A7B7DA;
    --brand: #7FA8FF;
    --brand-deep: #A9C3FF;
    --soft: #132350;
    --line: #22366B;
    --card: rgba(255, 255, 255, .06);
    --glass-line: rgba(255, 255, 255, .1);
    --btn: #7FA8FF;
    --btn-hover: #A9C3FF;
    --btn-text: #0A1430;
    --blob1: #1E3A8A;
    --blob2: #312E81;
    --blob3: #0E7490;
    --shadow: rgba(0, 0, 0, .55);
    color-scheme: dark;
}

/* Gelap: mengikuti pengaturan perangkat, kecuali pengunjung memilih terang */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #0A1430;
        --ink: #E8EFFF;
        --muted: #A7B7DA;
        --brand: #7FA8FF;
        --brand-deep: #A9C3FF;
        --soft: #132350;
        --line: #22366B;
        --card: rgba(255, 255, 255, .06);
        --glass-line: rgba(255, 255, 255, .1);
        --btn: #7FA8FF;
        --btn-hover: #A9C3FF;
        --btn-text: #0A1430;
        --blob1: #1E3A8A;
        --blob2: #312E81;
        --blob3: #0E7490;
        --shadow: rgba(0, 0, 0, .55);
        color-scheme: dark;
    }
}

:root[data-theme="light"] {
    color-scheme: light;
}

body {
    background: var(--bg);
    color: var(--ink);
}

:focus-visible {
    outline: 3px solid #F59E0B;
    outline-offset: 3px;
    border-radius: 8px;
}

/* ===== Komponen umum ===== */
.glass {
    background: var(--card);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border: 1px solid var(--glass-line);
    box-shadow: 0 14px 34px -18px var(--shadow);
}

.lift {
    transition: transform .35s ease, box-shadow .35s ease;
}

.lift:hover {
    transform: translateY(-6px);
    box-shadow: 0 26px 46px -20px var(--shadow);
}

.band {
    background: linear-gradient(180deg, transparent, var(--soft) 22%, var(--soft) 78%, transparent);
}

.icon {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 16px;
    background: var(--soft);
    color: var(--brand);
}

.chip {
    border-radius: 999px;
    padding: .3rem .8rem;
    font-size: .85rem;
    font-weight: 500;
    background: var(--soft);
    color: var(--brand-deep);
}

.btn-primary {
    background: var(--btn);
    color: var(--btn-text);
    box-shadow: 0 12px 24px -12px var(--shadow);
    transition: background .25s, transform .25s;
}

.btn-primary:hover {
    background: var(--btn-hover);
    transform: translateY(-2px);
}

.btn-ghost {
    border: 1.5px solid var(--line);
    background: var(--card);
    transition: border-color .25s, transform .25s;
}

.btn-ghost:hover {
    border-color: var(--brand);
    transform: translateY(-2px);
}

.dot {
    background: var(--brand);
    box-shadow: 0 0 0 6px var(--soft);
}

.text-grad {
    background: linear-gradient(90deg, var(--brand-deep), var(--brand), #38BDF8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ===== Navigasi ===== */
.nav-link {
    position: relative;
    padding: .25rem 0;
    transition: color .2s;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    height: 2px;
    width: 100%;
    background: var(--brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s;
    border-radius: 2px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--brand);
}

.nav-link.active::after,
.nav-link:hover::after {
    transform: scaleX(1);
}

#progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    z-index: 60;
    background: linear-gradient(90deg, #38BDF8, var(--brand));
}

#site-header {
    transition: box-shadow .3s, background .3s;
}

#site-header.scrolled {
    box-shadow: 0 10px 30px -18px var(--shadow);
}

#to-top {
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity .3s, transform .3s;
}

#to-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: none;
}

/* ===== Animasi ===== */
.blob {
    position: absolute;
    border-radius: 999px;
    filter: blur(70px);
    opacity: .7;
    animation: drift 16s ease-in-out infinite;
}

@keyframes drift {

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

    50% {
        transform: translate(34px, -26px) scale(1.1);
    }
}

@keyframes floaty {

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

    50% {
        transform: translateY(-10px);
    }
}

.float {
    animation: floaty 6s ease-in-out infinite;
}

.float-b {
    animation: floaty 8s ease-in-out -3s infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: .3;
    }
}

.live-dot {
    animation: pulse-dot 1.6s ease-in-out infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    margin-left: 3px;
    vertical-align: -0.12em;
    background: var(--brand);
    animation: blink 1s steps(1) infinite;
}

.js .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .7s ease, transform .7s ease;
}

.js .reveal.in {
    opacity: 1;
    transform: none;
}

/* ===== Filter proyek ===== */
.filter-btn {
    border-radius: 999px;
    padding: .45rem 1.1rem;
    font-weight: 600;
    font-size: .9rem;
    border: 1.5px solid var(--line);
    background: var(--card);
    transition: border-color .25s, background .25s, color .25s;
}

.filter-btn:hover {
    border-color: var(--brand);
}

.filter-btn.active {
    background: var(--btn);
    color: var(--btn-text);
    border-color: var(--btn);
}

@keyframes pop {
    from {
        opacity: 0;
        transform: scale(.96);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

.pop {
    animation: pop .4s ease;
}

@media (min-width: 768px) {
    #grid-proyek.filtered>article {
        grid-column: span 3 / span 3;
    }
}

/* ===== Modal detail proyek ===== */
dialog#detail {
    width: min(92vw, 640px);
    max-height: 88vh;
    overflow: auto;
    margin: auto;
    padding: 0;
    border-radius: 28px;
    background: var(--bg);
    color: var(--ink);
    border: 1px solid var(--line);
    box-shadow: 0 40px 80px -30px var(--shadow);
}

dialog#detail::backdrop {
    background: rgba(10, 20, 48, .55);
    backdrop-filter: blur(4px);
}

dialog#detail[open] {
    animation: pop .3s ease;
}

/* ===== Form kontak ===== */
.field {
    border: 1.5px solid var(--line);
    background: var(--card);
    border-radius: 16px;
    padding: .7rem 1rem;
    font-weight: 400;
    color: var(--ink);
    width: 100%;
}

.field:focus-visible {
    border-color: var(--brand);
}

/* ===== Kurangi gerakan (harus paling bawah) ===== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto !important;
    }

    .blob,
    .float,
    .float-b,
    .live-dot,
    .cursor {
        animation: none;
    }

    .js .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .lift,
    .lift:hover {
        transition: none;
        transform: none;
    }

    .pop,
    dialog#detail[open] {
        animation: none;
    }
}