/* ==========================================================================
   Rith Programming — theme
   Palette sampled directly from the logo artwork.
   ========================================================================== */

:root {
  --navy-900: #0b172c;
  --navy-800: #0f1f39;
  --navy-700: #142340;
  --navy-600: #16294a;
  --navy-500: #1d3560;

  --orange: #f7963c;
  --orange-soft: #ffb066;
  --blue: #3a7fb0;
  --blue-soft: #4a90c4;

  --silver: #b5bcc6;
  --silver-dim: #7d8794;
  --white: #f4f7fb;

  --line: rgba(181, 188, 198, .14);
  --line-strong: rgba(181, 188, 198, .28);

  --nav-h: 64px;
  --radius: 18px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  background-color: var(--navy-900);
  color: var(--silver);
  font-family: "Inter", "Noto Sans Thai", system-ui, sans-serif;
  line-height: 1.85;
  letter-spacing: .01em;
  overflow-x: hidden;
}

/* Thai glyphs are taller than Latin — give them room. */
html[lang="th"] body { line-height: 1.95; }

::selection { background: var(--orange); color: var(--navy-900); }

/* ---------- typography ------------------------------------------------- */

h1, h2, h3, h4, .display-hero {
  color: var(--white);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.25;
}

html[lang="th"] h1,
html[lang="th"] h2,
html[lang="th"] h3 { letter-spacing: 0; line-height: 1.4; }

.display-hero {
  font-size: clamp(2.4rem, 7vw, 5rem);
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.08;
}

html[lang="th"] .display-hero { letter-spacing: -.01em; line-height: 1.3; }

.section-title {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  font-weight: 700;
}

.eyebrow {
  color: var(--orange);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.lead-muted {
  color: var(--silver-dim);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  max-width: 46ch;
}

.text-gradient {
  background: linear-gradient(100deg, var(--orange) 0%, var(--orange-soft) 45%, var(--blue-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- layout ----------------------------------------------------- */

.section { padding: clamp(5rem, 11vw, 9.5rem) 0; }
.section-tight { padding: clamp(3.5rem, 7vw, 6rem) 0; }
.section-alt { background: var(--navy-800); }

.hairline { border-top: 1px solid var(--line); }

/* ---------- navbar ----------------------------------------------------- */

.site-nav {
  background: rgba(11, 23, 44, .72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  min-height: var(--nav-h);
  transition: border-color .4s var(--ease), background .4s var(--ease);
}

.site-nav.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(11, 23, 44, .9);
}

.brand-mark-wrap {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  flex: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  object-fit: cover;
}

.brand-name {
  color: var(--white);
  font-weight: 700;
  font-size: .98rem;
  letter-spacing: .04em;
}

.brand-name span { color: var(--silver-dim); font-weight: 500; }

.site-nav .nav-link {
  color: var(--silver);
  font-size: .92rem;
  padding: .35rem .95rem;
  transition: color .25s var(--ease);
}

.site-nav .nav-link:hover,
.site-nav .nav-link:focus-visible { color: var(--white); }

.navbar-toggler {
  border: 1px solid var(--line-strong);
  padding: .3rem .55rem;
}

.navbar-toggler:focus { box-shadow: none; }

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23b5bcc6' stroke-width='2' stroke-linecap='round' d='M4 8h22M4 15h22M4 22h22'/%3E%3C/svg%3E");
}

/* language switch */
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 2px;
  background: rgba(255, 255, 255, .03);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--silver-dim);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .06em;
  padding: .2rem .7rem;
  border-radius: 999px;
  transition: color .25s var(--ease), background .25s var(--ease);
}

.lang-switch button[aria-pressed="true"] {
  background: var(--orange);
  color: var(--navy-900);
}

/* ---------- buttons ---------------------------------------------------- */

.btn-brand,
.btn-ghost {
  border-radius: 999px;
  font-size: .95rem;
  font-weight: 600;
  padding: .72rem 1.7rem;
  transition: transform .3s var(--ease), background .3s var(--ease),
              border-color .3s var(--ease), color .3s var(--ease);
}

.btn-brand {
  background: var(--orange);
  border: 1px solid var(--orange);
  color: var(--navy-900);
}

.btn-brand:hover,
.btn-brand:focus-visible {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
  color: var(--navy-900);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--white);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--blue-soft);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-sm-pill { padding: .48rem 1.15rem; font-size: .86rem; }

/* ---------- hero ------------------------------------------------------- */

.hero {
  position: relative;
  padding-top: clamp(6.5rem, 14vw, 10rem);
  padding-bottom: clamp(4rem, 9vw, 7rem);
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
  z-index: 0;
}

.hero::before {
  width: 46vw;
  height: 46vw;
  background: rgba(247, 150, 60, .16);
  top: -14vw;
  right: -10vw;
}

.hero::after {
  width: 40vw;
  height: 40vw;
  background: rgba(58, 127, 176, .16);
  bottom: -16vw;
  left: -12vw;
}

.hero > .container { position: relative; z-index: 1; }

/* ---------- hero 3D stage --------------------------------------------- */

.hero .row > [class*="col-"] { min-width: 0; }

.hero-stage {
  position: relative;
  perspective: 1500px;
  perspective-origin: 60% 40%;
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(4rem, 8vw, 5.5rem);
  margin-inline: auto;
  max-width: 560px;
}

/* ตารางเรืองแสงด้านหลัง ให้ฉากดูมีระยะ */
.stage-grid {
  position: absolute;
  inset: 6% -6% 12%;
  border-radius: 24px;
  background-image:
    linear-gradient(rgba(181, 188, 198, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(181, 188, 198, .07) 1px, transparent 1px);
  background-size: 34px 34px;
  transform: rotateX(52deg) translateZ(-120px) scale(1.1);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 0%, transparent 75%);
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 0%, transparent 75%);
  pointer-events: none;
}

.code-window {
  position: relative;
  max-width: 100%;
  transform-style: preserve-3d;
  transform: rotateY(-17deg) rotateX(9deg) rotate(1deg);
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, #16294a 0%, #0e1c35 60%, #0b172c 100%);
  box-shadow:
    0 2px 0 rgba(255, 255, 255, .06) inset,
    28px 40px 80px -30px rgba(0, 0, 0, .95),
    0 0 0 1px rgba(11, 23, 44, .6);
  overflow: hidden;
  animation: stage-float 8s ease-in-out infinite;
  transition: transform .8s var(--ease);
}

.hero-stage:hover .code-window { transform: rotateY(-8deg) rotateX(4deg); }

@keyframes stage-float {
  0%, 100% { translate: 0 0; }
  50%      { translate: 0 -12px; }
}

.code-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .035);
}

.dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.dot-red   { background: #ff5f57; }
.dot-amber { background: var(--orange); }
.dot-green { background: #5fbf7a; }

.code-file {
  margin-left: auto;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--silver-dim);
}

.code-body {
  margin: 0;
  padding: 1.15rem 1.25rem 1.5rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(.62rem, 1.5vw, .82rem);
  line-height: 1.7;
  color: var(--silver);
  overflow-x: auto;
  overflow-y: hidden;
  counter-reset: line;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.code-body::-webkit-scrollbar { display: none; }

.code-body code { white-space: pre; }

/* จอแคบ ย่อโค้ดลงตามความกว้างจริง ไม่ให้ดันหน้าเว็บล้น */
@media (max-width: 767.98px) {
  .code-body { font-size: 2.05vw; }
}

/* เลขบรรทัดสร้างจาก CSS ไม่ต้องเขียนในมาร์กอัป */
.cl { display: block; }

.cl::before {
  counter-increment: line;
  content: counter(line);
  display: inline-block;
  width: 1.9em;
  margin-right: .9em;
  text-align: right;
  color: rgba(125, 135, 148, .55);
}

.c-com  { color: #5d6b80; font-style: italic; }
.c-key  { color: var(--orange); }
.c-fn   { color: var(--blue-soft); }
.c-str  { color: #8fd0a8; }
.c-prop { color: #cdd5e0; }
.c-var  { color: var(--white); }
.c-op   { color: var(--silver-dim); }

.caret {
  display: inline-block;
  width: 7px;
  height: 1em;
  margin-left: 4px;
  vertical-align: -.15em;
  background: var(--orange);
  animation: blink 1.2s steps(1) infinite;
}

@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* โลโก้ลอยซ้อนหน้าหน้าต่างโค้ด */
.logo-plate {
  position: absolute;
  left: -10%;
  bottom: -9%;
  width: clamp(120px, 28%, 180px);
  padding: 10px;
  border-radius: 22px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(150deg, rgba(255, 255, 255, .12), rgba(255, 255, 255, .03));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 24px 30px 60px -25px rgba(0, 0, 0, .95);
  transform: rotateY(-13deg) rotateX(7deg);
  animation: plate-float 8s ease-in-out infinite;
  animation-delay: -2s;
}

.logo-plate img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}

@keyframes plate-float {
  0%, 100% { translate: 0 0; }
  50%      { translate: 0 -18px; }
}

/* ชิปโค้ดลอยรอบฉาก */
.chip {
  position: absolute;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: .95rem;
  font-weight: 700;
  border: 1px solid var(--line-strong);
  background: rgba(22, 41, 74, .85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 20px 40px -18px rgba(0, 0, 0, .9);
  animation: plate-float 7s ease-in-out infinite;
}

.chip-1 {
  top: 2%;
  right: 2%;
  color: var(--orange);
  transform: rotateY(-16deg) rotateX(8deg);
}

.chip-2 {
  bottom: 16%;
  right: -3%;
  color: var(--blue-soft);
  animation-delay: -3.5s;
  transform: rotateY(-16deg) rotateX(8deg);
}

.hero-meta {
  color: var(--silver-dim);
  font-size: .86rem;
  letter-spacing: .04em;
}

/* ---------- cards ------------------------------------------------------ */

.card-flat {
  position: relative;
  height: 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2.1rem 1.9rem;
  transition: transform .45s var(--ease), border-color .45s var(--ease),
              background .45s var(--ease);
}

.card-flat:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .02));
}

.card-flat h3 { font-size: 1.22rem; margin-bottom: .6rem; }
.card-flat p  { color: var(--silver-dim); font-size: .96rem; margin-bottom: 0; }

.icon-tile {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: rgba(247, 150, 60, .12);
  border: 1px solid rgba(247, 150, 60, .28);
  color: var(--orange);
  margin-bottom: 1.4rem;
}

.icon-tile svg { width: 22px; height: 22px; }

/* ---------- process ---------------------------------------------------- */

.step-no {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--blue-soft);
}

.step-item {
  padding: 1.9rem 0;
  border-top: 1px solid var(--line);
}

.step-item h3 { font-size: 1.15rem; margin-bottom: .35rem; }
.step-item p  { color: var(--silver-dim); font-size: .95rem; margin-bottom: 0; }

/* ---------- portfolio — ม้าหมุนแบบ Coverflow พร้อมเงาสะท้อน ------------ */

.carousel {
  position: relative;
  height: 660px;
  perspective: 1400px;
  perspective-origin: 50% 46%;
  margin-bottom: 1rem;
  touch-action: pan-y;
  overflow: hidden;
}

/* แสงเรืองบางๆ ใต้แถวการ์ด */
.floor {
  position: absolute;
  left: 50%;
  bottom: 118px;
  width: 900px;
  height: 110px;
  margin-left: -450px;
  pointer-events: none;
  background: radial-gradient(60% 100% at 50% 50%, rgba(247, 150, 60, .13), transparent 70%);
  filter: blur(18px);
}

.ring {
  position: absolute;
  left: 50%;
  top: 16px;
  width: 0;
  height: 0;
  transform-style: preserve-3d;
  transform: translateX(var(--drag, 0px));
  transition: transform .5s var(--ease);
}

.carousel.is-dragging .ring { transition: none; }

.work-card {
  position: absolute;
  left: 0;
  top: 0;
  width: min(512px, 56vw);
  display: block;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  background: linear-gradient(170deg, #1b3159 0%, #142744 55%, #0e1d36 100%);
  text-decoration: none;
  transform:
    translateX(-50%)
    translateX(var(--x, 0px))
    translateZ(var(--z, 0px))
    rotateY(var(--r, 0deg))
    scale(var(--s, 1));
  opacity: var(--o, 1);
  filter: brightness(var(--b, 1));
  transition: transform .85s cubic-bezier(.22, .72, .16, 1),
              opacity .6s var(--ease),
              filter .6s var(--ease),
              box-shadow .5s var(--ease),
              border-color .5s var(--ease);
  box-shadow: 0 26px 55px -26px rgba(0, 0, 0, .95);
  -webkit-box-reflect: below 12px linear-gradient(transparent 74%, rgba(255, 255, 255, .14));
}

.work-card.is-front {
  border-color: rgba(247, 150, 60, .5);
  box-shadow:
    0 0 0 1px rgba(247, 150, 60, .2),
    0 34px 70px -24px rgba(0, 0, 0, .95),
    0 0 60px -14px rgba(247, 150, 60, .4);
}

.work-card:focus-visible { outline: 2px solid var(--orange); outline-offset: 4px; }

/* แสงกวาดผิวการ์ดแบบกระจก */
.card-sheen {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 36%, rgba(255, 255, 255, .2) 48%, transparent 60%);
  background-size: 250% 100%;
  background-position: 150% 0;
  opacity: 0;
  transition: opacity .4s var(--ease);
}

.work-card.is-front .card-sheen { opacity: 1; animation: card-sheen 4.2s var(--ease) infinite; }

@keyframes card-sheen {
  0%   { background-position: 150% 0; }
  55%  { background-position: -70% 0; }
  100% { background-position: -70% 0; }
}

.work-thumb {
  position: relative;
  aspect-ratio: 16 / 11;
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(58, 127, 176, .4), transparent 62%),
    radial-gradient(120% 120% at 88% 100%, rgba(247, 150, 60, .3), transparent 60%),
    var(--navy-600);
  border-bottom: 1px solid var(--line);
  color: var(--white);
  font-weight: 800;
  font-size: 3.1rem;
  letter-spacing: .06em;
}

.work-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(181, 188, 198, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(181, 188, 198, .07) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 50%, #000, transparent 78%);
  mask-image: radial-gradient(70% 70% at 50% 50%, #000, transparent 78%);
}

.work-thumb span { position: relative; z-index: 1; }

.work-body { padding: 1.7rem 2rem 2.1rem; }
.work-body h3 { font-size: 1.5rem; margin-bottom: .5rem; }
.work-body p  { color: var(--silver-dim); font-size: 1.04rem; margin-bottom: 0; }

.tag {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue-soft);
  border: 1px solid rgba(58, 127, 176, .35);
  border-radius: 999px;
  padding: .12rem .7rem;
  margin-bottom: .8rem;
}

/* ปุ่มเลื่อน */
.car-nav {
  position: absolute;
  top: 40%;
  z-index: 20;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: rgba(11, 23, 44, .72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--white);
  transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}

.car-nav svg { width: 22px; height: 22px; }
.car-nav.prev { left: max(16px, 4vw); }
.car-nav.next { right: max(16px, 4vw); }

.car-nav:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--navy-900);
  transform: scale(1.08);
}

/* จุดบอกตำแหน่ง */
.car-dots {
  position: absolute;
  left: 50%;
  bottom: 4px;
  transform: translateX(-50%);
  display: flex;
  gap: 9px;
  z-index: 20;
}

.car-dots button {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(181, 188, 198, .35);
  transition: width .4s var(--ease), background .4s var(--ease);
}

.car-dots button[aria-current="true"] {
  width: 26px;
  background: var(--orange);
}

@media (max-width: 991.98px) {
  .carousel { height: 570px; }
  .work-card { width: min(400px, 70vw); }
  .work-thumb { font-size: 2.4rem; }
  .work-body { padding: 1.4rem 1.5rem 1.7rem; }
  .work-body h3 { font-size: 1.25rem; }
}

@media (max-width: 575.98px) {
  .carousel { height: 480px; }
  .work-card { width: min(300px, 78vw); }
  .work-thumb { font-size: 2rem; }
  .work-body { padding: 1.15rem 1.3rem 1.45rem; }
  .work-body h3 { font-size: 1.12rem; }
  .work-body p  { font-size: .92rem; }
  .car-nav { width: 40px; height: 40px; }
}

/* ส่วนผลงานไม่ต้องเว้นด้านล่างเยอะ เพราะม้าหมุนมีที่ว่างของตัวเองอยู่แล้ว */
#work { padding-bottom: clamp(1.5rem, 3vw, 3rem); }

/* ---------- pillars — การ์ด 3 มิติ ไอคอนทะลุกรอบตอนชี้ ---------------- */

.pillar {
  perspective: 1000px;
  height: 100%;
  padding-top: 26px;          /* เผื่อที่ให้ไอคอนทะลุออกนอกกรอบ */
}

.pillar-inner {
  position: relative;
  height: 100%;
  padding: 5.6rem 1.1rem 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .012));
  transform-style: preserve-3d;
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform .55s var(--ease), border-color .45s var(--ease),
              background .45s var(--ease), box-shadow .45s var(--ease);
  will-change: transform;
}

.pillar:hover .pillar-inner {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, .085), rgba(255, 255, 255, .02));
  box-shadow: 0 38px 70px -30px rgba(0, 0, 0, .95);
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateZ(14px);
  transition-duration: .16s, .45s, .45s, .45s;
}

/* แสงส้มวิ่งตามเมาส์ */
.pillar-glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  pointer-events: none;
  background: radial-gradient(170px 170px at var(--mx, 50%) var(--my, 50%),
              rgba(247, 150, 60, .2), transparent 70%);
  transition: opacity .45s var(--ease);
}

.pillar:hover .pillar-glow { opacity: 1; }

/* ---- ลูกเล่นวิบวับ: ขอบแสงวิ่ง ประกาย และออร่า ---- */

@property --ring-angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

/* เส้นแสงวิ่งรอบขอบการ์ด */
.pillar-inner::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from var(--ring-angle),
              transparent 0 48%,
              rgba(247, 150, 60, .95) 62%,
              rgba(255, 176, 102, .9) 68%,
              rgba(74, 144, 196, .75) 78%,
              transparent 90%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  pointer-events: none;
  transition: opacity .5s var(--ease);
  animation: ring-spin 4s linear infinite;
}

.pillar:hover .pillar-inner::before { opacity: 1; }

@keyframes ring-spin {
  to { --ring-angle: 360deg; }
}

/* ออร่าเรืองแสงหลังวัตถุ */
.pillar-icon::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 96px;
  height: 96px;
  margin: -48px 0 0 -48px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(247, 150, 60, .42), rgba(247, 150, 60, .08) 62%, transparent 72%);
  transform: translateZ(-30px);
  opacity: 0;
  transition: opacity .55s var(--ease);
  animation: aura-breathe 3.4s ease-in-out infinite;
}

.pillar:hover .pillar-icon::before { opacity: 1; }

@keyframes aura-breathe {
  0%, 100% { transform: translateZ(-30px) scale(.88); }
  50%      { transform: translateZ(-30px) scale(1.12); }
}

/* ประกายวิบวับรอบการ์ด */
.sparks {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.sparks i {
  position: absolute;
  width: 13px;
  height: 13px;
  background: #fff;
  /* ประกายสี่แฉก */
  clip-path: polygon(50% 0%, 60% 40%, 100% 50%, 60% 60%, 50% 100%, 40% 60%, 0% 50%, 40% 40%);
  filter: drop-shadow(0 0 6px rgba(247, 150, 60, .95));
  opacity: 0;
  transform: scale(0);
}

.pillar:hover .sparks i { animation: twinkle 1.9s ease-in-out infinite; }

.sparks i:nth-child(1) { top: 12%; left: 14%; animation-delay: 0s; }
.sparks i:nth-child(2) { top: 6%;  right: 18%; width: 10px; height: 10px; animation-delay: .35s; }
.sparks i:nth-child(3) { top: 34%; right: 8%;  width: 16px; height: 16px; animation-delay: .75s; }
.sparks i:nth-child(4) { bottom: 20%; left: 10%; width: 10px; height: 10px; animation-delay: 1.05s; }
.sparks i:nth-child(5) { bottom: 12%; right: 22%; animation-delay: 1.45s;
                         filter: drop-shadow(0 0 6px rgba(74, 144, 196, .95)); }

@keyframes twinkle {
  0%, 100% { opacity: 0; transform: scale(0) rotate(0deg); }
  35%      { opacity: 1; transform: scale(1.25) rotate(90deg); }
  70%      { opacity: .25; transform: scale(.7) rotate(160deg); }
}

/* กราฟิก 3 มิติประจำคำ — อยู่ในกรอบตอนปกติ ทะลุขอบบนออกมาตอนชี้ */
.pillar-icon {
  position: absolute;
  top: 12px;
  left: 50%;
  display: grid;
  place-items: center;
  width: 92px;
  height: 66px;
  transform: translate(-50%, 0) translateZ(0);
  transition: transform .6s var(--ease), filter .5s var(--ease);
}

.pillar:hover .pillar-icon {
  transform: translate(-50%, -78%) translateZ(90px) scale(1.08);
  filter: drop-shadow(0 24px 22px rgba(0, 0, 0, .75));
}

/* เงาใต้วัตถุตอนลอยขึ้น */
.pillar-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -10px;
  width: 52px;
  height: 11px;
  border-radius: 50%;
  transform: translateX(-50%) translateZ(-40px);
  background: radial-gradient(closest-side, rgba(0, 0, 0, .6), transparent);
  opacity: 0;
  transition: opacity .5s var(--ease);
}

.pillar:hover .pillar-icon::after { opacity: 1; }

/* ---- แท่นโชว์ + อุปกรณ์ประกอบที่ลอยขึ้นเป็นฉากหลัง ---- */

.stage {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1px;
  height: 1px;
  transform-style: preserve-3d;
  pointer-events: none;
}

/* แท่นวางใต้วัตถุ */
.pedestal {
  position: absolute;
  left: 50%;
  top: 20px;
  width: 90px;
  height: 24px;
  margin-left: -45px;
  border-radius: 50%;
  border: 1.5px solid rgba(247, 150, 60, .75);
  background:
    radial-gradient(closest-side, rgba(247, 150, 60, .55), rgba(247, 150, 60, .14) 68%, transparent),
    linear-gradient(180deg, rgba(255, 255, 255, .16), transparent);
  box-shadow: 0 0 30px rgba(247, 150, 60, .6), inset 0 0 14px rgba(255, 176, 102, .5);
  transform: translateZ(-10px) rotateX(66deg) scale(.4);
  opacity: 0;
  transition: transform .6s var(--ease), opacity .5s var(--ease);
}

.pillar:hover .pedestal {
  opacity: 1;
  transform: translateZ(-10px) rotateX(66deg) scale(1);
}

/* อุปกรณ์ประกอบ ซ่อนอยู่หลังวัตถุแล้วกระจายออกตอนชี้ */
.prop {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  transform: translate(-50%, -50%) translateZ(-40px) scale(.35);
  transition: transform .65s var(--ease), opacity .5s var(--ease);
}

.pillar:hover .prop { opacity: .92; }

.pillar:hover .p1 { transform: translate(-215%, -165%) translateZ(-34px) scale(1) rotate(-10deg); }
.pillar:hover .p2 { transform: translate(105%, -185%)  translateZ(-44px) scale(.9) rotate(12deg); }
.pillar:hover .p3 { transform: translate(140%, -15%)   translateZ(-30px) scale(.82) rotate(-6deg); }

.pillar:hover .p2 { transition-delay: .06s; }
.pillar:hover .p3 { transition-delay: .12s; }

/* ผิวร่วมของอุปกรณ์ประกอบ */
.prop > span {
  display: block;
  border: 1px solid rgba(181, 188, 198, .3);
  background: linear-gradient(150deg, #2a4772 0%, #1a3057 60%, #122443 100%);
  box-shadow: 1px 2px 0 -1px #0d1a31, 3px 4px 8px -2px rgba(0, 0, 0, .75);
}

/* ฐานข้อมูล */
.pr-db {
  width: 22px;
  height: 26px;
  border-radius: 50% / 22%;
  position: relative;
}

.pr-db::after {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  top: 3px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid rgba(247, 150, 60, .65);
}

/* ชิป */
.pr-chip {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  position: relative;
}

.pr-chip::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 2px;
  border: 1.5px solid rgba(247, 150, 60, .75);
}

/* แถบโค้ด/ข้อมูล */
.pr-bar {
  width: 30px;
  height: 13px;
  border-radius: 4px;
  position: relative;
}

.pr-bar::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 4px;
  width: 15px;
  height: 2.5px;
  border-radius: 2px;
  background: rgba(74, 144, 196, .85);
  box-shadow: 0 5px 0 rgba(181, 188, 198, .45);
}

/* แท็บเบราว์เซอร์ */
.pr-tab {
  width: 28px;
  height: 18px;
  border-radius: 5px 5px 3px 3px;
  position: relative;
}

.pr-tab::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 4px;
  width: 6px;
  height: 3px;
  border-radius: 2px;
  background: var(--orange);
  box-shadow: 9px 0 0 rgba(181, 188, 198, .4);
}

/* ลูกศรเมาส์ */
.pr-cursor {
  width: 16px;
  height: 20px;
  border: 0 !important;
  background: linear-gradient(160deg, #fff, var(--silver)) !important;
  box-shadow: none !important;
  clip-path: polygon(0 0, 0 78%, 27% 60%, 46% 100%, 66% 88%, 47% 50%, 82% 44%);
  filter: drop-shadow(2px 4px 5px rgba(0, 0, 0, .8));
}

/* ไทล์แอป */
.pr-tile {
  width: 19px;
  height: 19px;
  border-radius: 6px;
  position: relative;
}

.pr-tile::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 7px;
  height: 7px;
  margin: -3.5px 0 0 -3.5px;
  border-radius: 2px;
  background: rgba(247, 150, 60, .8);
}

/* แจ้งเตือน */
.pr-bubble {
  width: 22px;
  height: 17px;
  border-radius: 7px 7px 7px 2px;
  position: relative;
}

.pr-bubble::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 6px 0 0 rgba(181, 188, 198, .5), 12px 0 0 rgba(181, 188, 198, .5);
}

/* เฟือง */
.pr-gear {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 5px dotted rgba(247, 150, 60, .8) !important;
  background: radial-gradient(closest-side, #1c3258 62%, transparent 64%) !important;
  box-shadow: 2px 3px 7px -2px rgba(0, 0, 0, .8) !important;
  animation: gear-turn 7s linear infinite;
}

.pr-gear.sm { width: 17px; height: 17px; border-width: 4px !important; animation-direction: reverse; }

@keyframes gear-turn { to { transform: rotate(360deg); } }

/* ประแจ */
.pr-wrench {
  width: 26px;
  height: 8px;
  border-radius: 4px;
  position: relative;
  transform: rotate(-38deg);
}

.pr-wrench::after {
  content: "";
  position: absolute;
  right: -4px;
  top: -3px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 3px solid rgba(74, 144, 196, .85);
  border-right-color: transparent;
}

/* ฐานของวัตถุ 3 มิติทุกชิ้น */
.obj {
  position: relative;
  display: block;
  width: 62px;
  height: 58px;
  transform-style: preserve-3d;
  transition: transform .7s var(--ease);
}

/* ลอยขึ้นลงเบาๆ ตลอดเวลา คนละจังหวะกันแต่ละใบ */
.pillar-icon { animation: obj-bob 5.5s ease-in-out infinite; }

#pillars > div:nth-child(2) .pillar-icon { animation-delay: -1.4s; }
#pillars > div:nth-child(3) .pillar-icon { animation-delay: -2.8s; }
#pillars > div:nth-child(4) .pillar-icon { animation-delay: -4.1s; }

@keyframes obj-bob {
  0%, 100% { translate: 0 0; }
  50%      { translate: 0 -7px; }
}

/* แสงกวาดผ่านผิววัตถุ */
.obj .face::before,
.obj .slab::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(105deg, transparent 38%, rgba(255, 255, 255, .55) 50%, transparent 62%);
  background-size: 260% 100%;
  background-position: 160% 0;
  opacity: .55;
  pointer-events: none;
}

.pillar:hover .obj .face::before,
.pillar:hover .obj .slab::before { animation: sheen 1.5s var(--ease) infinite; }

@keyframes sheen {
  0%   { background-position: 160% 0; }
  60%  { background-position: -60% 0; }
  100% { background-position: -60% 0; }
}

.obj .face,
.obj .slab {
  position: absolute;
  left: 50%;
  top: 50%;
  border: 1px solid rgba(181, 188, 198, .26);
  background: linear-gradient(150deg, #2b4a78 0%, #1b3159 55%, #132545 100%);
  /* ขอบหนาแบบวัตถุตัน */
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .16),
    2px 3px 0 -1px #0e1c33,
    4px 6px 0 -2px #0b1730,
    6px 9px 14px -4px rgba(0, 0, 0, .8);
}

/* ---- ระบบ: แร็กเซิร์ฟเวอร์วางซ้อน (ไอโซเมตริก) ---- */
.obj-server { transform: rotateX(58deg) rotateZ(-40deg); }
.pillar:hover .obj-server { transform: rotateX(52deg) rotateZ(-30deg); }

.obj-server .slab {
  width: 52px;
  height: 15px;
  margin: -7px 0 0 -26px;
  border-radius: 4px;
}

.obj-server .slab:nth-child(1) { transform: translateZ(0); }
.obj-server .slab:nth-child(2) { transform: translateZ(11px); }
.obj-server .slab:nth-child(3) { transform: translateZ(22px); }

.pillar:hover .obj-server .slab:nth-child(2) { transform: translateZ(15px); }
.pillar:hover .obj-server .slab:nth-child(3) { transform: translateZ(30px); }

.obj-server .slab::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 50%;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 7px rgba(247, 150, 60, .9);
  animation: led-blink 2.2s ease-in-out infinite;
}

@keyframes led-blink {
  0%, 100% { opacity: 1; }
  45%      { opacity: .25; }
}

.obj-server .slab:nth-child(2)::after {
  background: var(--blue-soft);
  box-shadow: 0 0 7px rgba(74, 144, 196, .9);
  animation-delay: -1.1s;
}

.obj-server .slab:nth-child(3)::after { animation-delay: -.6s; }

/* ---- เว็บ: หน้าต่างเบราว์เซอร์ ---- */
.obj-browser { transform: rotateX(11deg) rotateY(-26deg); }
.pillar:hover .obj-browser { transform: rotateX(8deg) rotateY(-14deg); }

.obj-browser .face {
  width: 58px;
  height: 44px;
  margin: -22px 0 0 -29px;
  border-radius: 7px;
  padding: 6px 6px 0;
  overflow: hidden;
}

.obj-browser .bar {
  display: flex;
  gap: 3px;
  padding-bottom: 5px;
  margin-bottom: 6px;
  border-bottom: 1px solid rgba(181, 188, 198, .22);
}

.obj-browser .bar i { width: 4px; height: 4px; border-radius: 50%; background: rgba(181, 188, 198, .5); }
.obj-browser .bar i:first-child { background: var(--orange); }

.obj .ln {
  display: block;
  height: 3px;
  border-radius: 2px;
  margin-bottom: 4px;
  background: rgba(181, 188, 198, .42);
}

.obj .ln.w1 { width: 80%; background: rgba(247, 150, 60, .8); }
.obj .ln.w2 { width: 58%; }
.obj .ln.w3 { width: 68%; background: rgba(74, 144, 196, .75); }

/* ---- แอป: โทรศัพท์ ---- */
.obj-phone { transform: rotateX(10deg) rotateY(-24deg); }
.pillar:hover .obj-phone { transform: rotateX(7deg) rotateY(-12deg); }

.obj-phone .face {
  width: 32px;
  height: 54px;
  margin: -27px 0 0 -16px;
  border-radius: 9px;
  padding: 13px 7px 0;
}

.obj-phone .ln { height: 2.5px; margin-bottom: 5px; }
.obj-phone .ln.w1 { width: 100%; }
.obj-phone .ln.w2 { width: 62%; }

.obj-phone .notch {
  position: absolute;
  top: 4px;
  left: 50%;
  width: 12px;
  height: 3px;
  margin-left: -6px;
  border-radius: 2px;
  background: rgba(181, 188, 198, .45);
}

.obj-phone .home {
  position: absolute;
  bottom: 5px;
  left: 50%;
  width: 14px;
  height: 3px;
  margin-left: -7px;
  border-radius: 2px;
  background: rgba(247, 150, 60, .85);
}

/* ---- ดูแล: โล่พร้อมเครื่องหมายถูก ---- */
.obj-shield { transform: rotateX(12deg) rotateY(-22deg); }
.pillar:hover .obj-shield { transform: rotateX(8deg) rotateY(-10deg); }

.obj-shield .face {
  width: 44px;
  height: 50px;
  margin: -25px 0 0 -22px;
  border-radius: 8px 8px 46% 46% / 8px 8px 62% 62%;
}

.obj-shield .tick {
  position: absolute;
  top: 17px;
  left: 12px;
  width: 19px;
  height: 10px;
  border-left: 3px solid var(--orange);
  border-bottom: 3px solid var(--orange);
  border-radius: 1px;
  transform: rotate(-45deg);
}

.stat-value {
  position: relative;
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -.01em;
  line-height: 1.35;
  transform: translateZ(0);
  transition: transform .55s var(--ease), color .45s var(--ease);
}

.pillar:hover .stat-value { transform: translateZ(40px); }

.stat-label {
  position: relative;
  color: var(--silver-dim);
  font-size: clamp(.95rem, 1.35vw, 1.05rem);
  letter-spacing: .01em;
  transform: translateZ(0);
  transition: transform .55s var(--ease), color .45s var(--ease);
}

.pillar:hover .stat-label {
  color: var(--silver);
  transform: translateZ(22px);
}

/* ---------- contact ---------------------------------------------------- */

.contact-panel {
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(100% 140% at 0% 0%, rgba(247, 150, 60, .13), transparent 55%),
    radial-gradient(100% 140% at 100% 100%, rgba(58, 127, 176, .15), transparent 55%),
    var(--navy-800);
}

.ig-handle {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: .02em;
  transition: color .25s var(--ease);
}

.ig-handle:hover { color: var(--orange); }
.ig-handle svg { width: 20px; height: 20px; }

/* ---------- footer ----------------------------------------------------- */

.site-footer {
  background: var(--navy-900);
  border-top: 1px solid var(--line);
  padding: 3.5rem 0 2.5rem;
  font-size: .9rem;
}

.site-footer a { color: var(--silver-dim); text-decoration: none; transition: color .25s var(--ease); }
.site-footer a:hover { color: var(--white); }
.site-footer .muted { color: var(--silver-dim); font-size: .84rem; }

/* ---------- scroll reveal ---------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .code-window, .logo-plate, .chip, .caret { animation: none; }
  .pillar-inner, .stat-value, .stat-label { transform: none !important; transition: none; }
  .pillar-icon { transform: translate(-50%, 0) !important; transition: none; }

  /* คงมุมสามมิติไว้ แต่ไม่ขยับตอนชี้ */
  .obj { transition: none !important; }
  .pillar-icon, .pillar-icon::before, .obj .face::before, .obj .slab::before,
  .sparks i, .pillar-inner::before, .obj-server .slab::after { animation: none !important; }
  .sparks { display: none; }
  .pr-gear { animation: none !important; }
  .prop, .pedestal { transition: none; }
  .pillar:hover .obj-server  { transform: rotateX(58deg) rotateZ(-40deg); }
  .pillar:hover .obj-browser { transform: rotateX(11deg) rotateY(-26deg); }
  .pillar:hover .obj-phone   { transform: rotateX(10deg) rotateY(-24deg); }
  .pillar:hover .obj-shield  { transform: rotateX(12deg) rotateY(-22deg); }
  .pillar:hover .obj-server .slab:nth-child(2) { transform: translateZ(11px); }
  .pillar:hover .obj-server .slab:nth-child(3) { transform: translateZ(22px); }
  .card-flat:hover, .work-card:hover, .btn-brand:hover, .btn-ghost:hover { transform: none; }
}

/* ---------- responsive ------------------------------------------------- */

@media (max-width: 991.98px) {
  .site-nav .navbar-collapse {
    background: rgba(11, 23, 44, .97);
    border: 1px solid var(--line);
    border-radius: 16px;
    margin-top: .8rem;
    padding: 1rem;
  }

  .site-nav .nav-link { padding: .55rem .4rem; }

  .hero-stage { margin-top: 2.5rem; }
}

@media (hover: none) {
  /* จอสัมผัสไม่มีการชี้เมาส์ ใช้สถานะปกติของการ์ดไปเลย ไม่ต้องให้ไอคอนทะลุกรอบ */
  .pillar-inner { transform: none; }
}

@media (max-width: 575.98px) {
  .pillar { padding-top: 22px; }
  .pillar-inner { padding: 4.3rem .7rem 1.5rem; }
  .pillar-icon { width: 48px; height: 48px; border-radius: 14px; top: 14px; }
  .pillar-icon svg { width: 23px; height: 23px; }

  /* จอมือถือ เลิกเอียง 3 มิติ เพราะอ่านโค้ดยากกว่าที่ได้ความสวย */
  .hero-stage { perspective: none; padding-bottom: 4.5rem; }
  .code-window, .logo-plate, .chip { transform: none; }
  .stage-grid { display: none; }
  .logo-plate { left: auto; right: 4%; bottom: -7%; width: 104px; }
  .chip-1     { width: 42px; height: 42px; top: -2%; right: 4%; }
  .chip-2     { width: 42px; height: 42px; right: auto; left: 2%; bottom: -4%; }
}