/* ============================================================
   ABOUT — فرتاک
   
   طراحی مدرن، بک‌گراند سه‌بعدی تعاملی Canvas، کارت‌های ۳ بعدی ارزش
   و نوار دستاوردهای آماری با موشن و افکت‌های واکنش‌گرای ماوس.
   ============================================================ */

.about {
  position: relative;
  isolation: isolate;
  display: block;
  min-block-size: clamp(42rem, 90svh, 68rem);
  padding-block: clamp(5rem, 9vw, 9rem);
  background-color: var(--c-bg);
  overflow: clip;
  perspective: 1200px;
}

/* ------------------------------------------------------------
   3D CANVAS & AMBIENT GLOWS
   ------------------------------------------------------------ */

.about__canvas {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.88;
  mix-blend-mode: screen;
}

:root[data-theme='light'] .about__canvas {
  mix-blend-mode: multiply;
  opacity: 0.55;
}

.about__glow {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(80px);
  z-index: 0;
  opacity: 0.35;
  transition: opacity var(--dur-slow) var(--ease);
}

.about__glow--primary {
  inline-size: clamp(22rem, 40vw, 42rem);
  block-size: clamp(22rem, 40vw, 42rem);
  top: 15%;
  left: 50%;
  transform: translate(-50%, -20%);
  background: radial-gradient(circle, rgba(155, 95, 217, 0.42) 0%, rgba(186, 234, 60, 0.12) 50%, transparent 75%);
  animation: floatGlow 14s ease-in-out infinite alternate;
}

.about__glow--secondary {
  inline-size: clamp(18rem, 30vw, 32rem);
  block-size: clamp(18rem, 30vw, 32rem);
  bottom: 10%;
  right: 15%;
  background: radial-gradient(circle, rgba(247, 69, 198, 0.28) 0%, rgba(252, 144, 36, 0.14) 50%, transparent 75%);
  animation: floatGlow 18s ease-in-out infinite alternate-reverse;
}

@keyframes floatGlow {
  0% { transform: translate(-50%, -20%) scale(0.95); }
  50% { transform: translate(-45%, -15%) scale(1.08); }
  100% { transform: translate(-55%, -25%) scale(1.02); }
}

.about__mesh {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image: 
    linear-gradient(to right, rgb(var(--rgb-ink) / 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgb(var(--rgb-ink) / 0.03) 1px, transparent 1px);
  background-size: 5rem 5rem;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 80%);
}

/* ------------------------------------------------------------
   CONTAINER & HEADER
   ------------------------------------------------------------ */

.about__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(2.5rem, 5vw, 4.5rem);
}

.about__header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: clamp(1.2rem, 2.5vw, 1.8rem);
  max-inline-size: min(100%, 54rem);
}

.about__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.15rem;
  border-radius: var(--r-pill);
  border: 1px solid rgb(var(--rgb-ink) / 0.14);
  background-color: rgb(var(--rgb-ink) / 0.04);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.about__badge-pulse {
  inline-size: 0.55rem;
  block-size: 0.55rem;
  border-radius: 50%;
  background-color: #BAEA3C;
  box-shadow: 0 0 10px #BAEA3C;
  animation: pulseDot 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

.about__badge-text {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.03em;
  color: var(--c-text);
}

.about__title {
  max-inline-size: 22ch;
  font-size: clamp(1.65rem, 3.2vw, 2.5rem);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
}

.about__lead {
  max-inline-size: 46ch;
  font-size: clamp(0.92rem, 1.1vw, 1.05rem);
  font-weight: var(--fw-normal);
  line-height: 1.7;
  color: var(--c-text-soft);
}

/* ------------------------------------------------------------
   3D PILLAR CARDS (کارت‌های ارزش‌آفرینی با انیمیشن خلاقانه)
   ------------------------------------------------------------ */

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

.about__pillars {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1rem, 1.8vw, 1.6rem);
  inline-size: 100%;
}

/* افکت تمرکز هوشمند: محو ملایم سایر کارت‌ها هنگام انتخاب یک کارت */
@media (hover: hover) {
  .about__pillars:has(.about-pillar:hover) .about-pillar:not(:hover) {
    opacity: 0.58;
    transform: scale(0.985);
  }
}

.about-pillar {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 2.4vw, 2rem);
  border-radius: var(--r-card);
  border: 1px solid rgb(var(--rgb-ink) / 0.10);
  background-color: rgb(var(--rgb-ink) / 0.03);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: clip;
  transform-style: preserve-3d;
  cursor: default;
  animation: pillarFloat 6.5s ease-in-out infinite;
  animation-delay: calc(var(--i, 0) * 1.3s);
  transition:
    transform var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease),
    box-shadow var(--dur-base) var(--ease),
    opacity var(--dur-base) var(--ease);
}

@keyframes pillarFloat {
  0%, 100% {
    --lev-y: 0px;
    --lev-rot: 0deg;
  }
  50% {
    --lev-y: -6px;
    --lev-rot: 0.4deg;
  }
}

.js .about-pillar[data-tilt] {
  transform:
    perspective(var(--perspective))
    translate3d(var(--fade-x, 0px), calc(var(--fade-y, 30px) + var(--lift, 0px) + var(--lev-y, 0px)), 0)
    rotateX(var(--tilt-x, 0deg))
    rotateY(var(--tilt-y, 0deg))
    rotateZ(var(--lev-rot, 0deg));
}

.js .about-pillar[data-tilt].is-in {
  --fade-x: 0px;
  --fade-y: 0px;
}

.about-pillar:hover {
  animation-play-state: paused;
  border-color: transparent;
  box-shadow: 
    0 22px 46px -12px rgb(var(--rgb-shadow) / 0.52),
    0 0 34px -6px var(--accent-color, rgba(186, 234, 60, 0.25));
}

/* هالهٔ نور چرخشی لیزری دور کارت */
.about-pillar__border-aura {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: conic-gradient(from var(--aura-angle), transparent 60%, var(--accent-color, #BAEA3C) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.25;
  pointer-events: none;
  animation: rotateAura 5.5s linear infinite;
  transition: opacity var(--dur-base) var(--ease), filter var(--dur-base) var(--ease);
}

.about-pillar:hover .about-pillar__border-aura {
  opacity: 1;
  animation-duration: 2.2s;
  filter: drop-shadow(0 0 7px var(--accent-color, #BAEA3C));
}

@keyframes rotateAura {
  to { --aura-angle: 360deg; }
}

/* نشانگر شماره کارت در گوشهٔ کارت */
.about-pillar__index {
  position: absolute;
  top: 1.1rem;
  left: 1.25rem;
  font-size: 0.78rem;
  font-weight: var(--fw-bold);
  font-family: var(--font-number, monospace);
  letter-spacing: 0.08em;
  color: rgb(var(--rgb-ink) / 0.22);
  pointer-events: none;
  z-index: 3;
  transition: color var(--dur-base) var(--ease), transform var(--dur-base) var(--ease-out);
}

.about-pillar:hover .about-pillar__index {
  color: var(--accent-color, #BAEA3C);
  transform: translateZ(16px) scale(1.1);
  text-shadow: 0 0 10px var(--accent-color);
}

.about-pillar__glass {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(135deg,
    rgb(255 255 255 / 0.06) 0%,
    rgb(255 255 255 / 0.01) 50%,
    transparent 100%);
}

.about-pillar__shine {
  position: absolute;
  inset: -100%;
  pointer-events: none;
  background: radial-gradient(circle at var(--shine-x, 50%) var(--shine-y, 50%),
    rgb(var(--rgb-shine) / 0.14) 0%,
    transparent 60%);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease);
}

.about-pillar:hover .about-pillar__shine {
  opacity: 1;
}

.about-pillar__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  height: 100%;
  transform: translateZ(24px);
  transition: transform var(--dur-base) var(--ease-out);
}

.about-pillar__icon {
  display: grid;
  place-items: center;
  inline-size: 3rem;
  block-size: 3rem;
  border-radius: var(--r-tile);
  border: 1px solid rgb(var(--rgb-ink) / 0.16);
  background-color: rgb(var(--rgb-ink) / 0.04);
  color: var(--accent-color, #BAEA3C);
  transition: 
    transform var(--dur-base) var(--ease),
    border-color var(--dur-base) var(--ease),
    box-shadow var(--dur-base) var(--ease);
}

.about-pillar__icon svg {
  inline-size: 1.5rem;
  block-size: 1.5rem;
}

.about-pillar__ripple {
  position: absolute;
  inline-size: 24px;
  block-size: 24px;
  transform: translate(-50%, -50%) scale(0);
  border-radius: 50%;
  background: radial-gradient(circle, var(--ripple-color, #BAEA3C) 0%, transparent 70%);
  pointer-events: none;
  z-index: 10;
  animation: pillarRipple 0.85s cubic-bezier(0.15, 0.85, 0.25, 1) forwards;
}

@keyframes pillarRipple {
  0% { transform: translate(-50%, -50%) scale(0); opacity: 0.65; }
  100% { transform: translate(-50%, -50%) scale(22); opacity: 0; }
}

.about-pillar:hover .about-pillar__icon {
  transform: scale(1.12) rotate(-5deg) translateZ(12px);
  border-color: var(--accent-color, #BAEA3C);
  box-shadow: 
    0 0 24px -3px var(--accent-color, #BAEA3C),
    inset 0 0 10px -2px var(--accent-color, #BAEA3C);
}

.about-pillar__title {
  margin: 0;
  font-size: clamp(1.05rem, 1.25vw, 1.25rem);
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  color: var(--c-text-strong);
}

.about-pillar__desc {
  margin: 0;
  font-size: var(--fs-sm);
  font-weight: var(--fw-normal);
  line-height: 1.75;
  color: var(--c-text-dim);
}

/* ------------------------------------------------------------
   ACTIONS (دکمه‌های اقدام)
   ------------------------------------------------------------ */

.about__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.about__btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding-inline: clamp(2rem, 3vw, 2.75rem);
}

.about__btn-cta svg {
  inline-size: 1.15rem;
  block-size: 1.15rem;
  transition: transform var(--dur-fast) var(--ease);
}

.about__btn-cta:hover svg {
  transform: translateX(-4px);
}

.about__btn-ghost {
  padding-inline: clamp(2rem, 3vw, 2.5rem);
}

/* ------------------------------------------------------------
   RESPONSIVE DESIGN
   ------------------------------------------------------------ */

@media (max-width: 1080px) {
  .about__pillars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

@media (max-width: 640px) {
  .about__pillars {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .about__actions {
    flex-direction: column;
    inline-size: 100%;
  }

  .about__btn-cta,
  .about__btn-ghost {
    inline-size: 100%;
  }
}

/* ------------------------------------------------------------
   LIGHT THEME SUPPORT
   ------------------------------------------------------------ */

:root[data-theme='light'] .about {
  background-color: var(--c-bg);
}

:root[data-theme='light'] .about__mesh {
  background-image: 
    linear-gradient(to right, rgb(var(--rgb-ink) / 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgb(var(--rgb-ink) / 0.05) 1px, transparent 1px);
}

:root[data-theme='light'] .about__glow--primary {
  background: radial-gradient(circle, rgba(155, 95, 217, 0.2) 0%, rgba(186, 234, 60, 0.08) 50%, transparent 75%);
}

:root[data-theme='light'] .about__glow--secondary {
  background: radial-gradient(circle, rgba(247, 69, 198, 0.15) 0%, rgba(252, 144, 36, 0.08) 50%, transparent 75%);
}

:root[data-theme='light'] .about__badge {
  background-color: rgb(255 255 255 / 0.85);
  border-color: rgb(var(--rgb-ink) / 0.12);
  box-shadow: 0 4px 14px rgb(var(--rgb-shadow) / 0.06);
}

:root[data-theme='light'] .about-pillar {
  background-color: rgb(255 255 255 / 0.78);
  border-color: rgb(var(--rgb-ink) / 0.10);
  box-shadow: 0 8px 24px rgb(var(--rgb-shadow) / 0.05);
}

:root[data-theme='light'] .about-pillar:hover {
  border-color: rgb(var(--rgb-ink) / 0.20);
  box-shadow: 0 16px 36px rgb(var(--rgb-shadow) / 0.10);
}

:root[data-theme='light'] .about-pillar__icon {
  background-color: rgb(255 255 255 / 0.9);
  border-color: rgb(var(--rgb-ink) / 0.12);
}

/* ------------------------------------------------------------
   REDUCED MOTION
   ------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  .about__glow {
    animation: none;
  }
  .about__badge-pulse {
    animation: none;
  }
  .about-pillar {
    transition: none;
  }
  .about-pillar__content {
    transform: none;
  }
}