/* =====================================================================
   Brand layer — Mehran Sattari
   Electric purple + metallic silver on deep black. Loaded after stylesRtl/stylesLtr.
   Palette (dark): bg #090B10 · charcoal #171923 · purple #922EFF · violet #C56BFF
                   text #E5E7EF · soft #9295A5 · border #292D39 · dark purple #302044 · glow #B14AFF
   Palette (light): bg #F8F9FC · surface #FFFFFF · purple #7B2BEA · accent #922EFF · text #20212A · soft #686B78 · border #E4E5EC
   ===================================================================== */

::selection { background: rgba(146, 46, 255, .35); color: #fff; }
body { background-image: radial-gradient(60% 40% at 50% -10%, rgba(146, 46, 255, .08), transparent 70%); background-repeat: no-repeat; }
body.light-theme { background-image: radial-gradient(60% 40% at 50% -10%, rgba(123, 43, 234, .06), transparent 70%); }
:focus-visible { outline: 2px solid var(--accent-color); outline-offset: 3px; }

/* ---------- buttons ---------- */
.button { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; padding: .85rem 1.6rem; border-radius: .85rem; border: 1px solid transparent; background-color: transparent; background-image: var(--brand-gradient); color: #fff; font-weight: var(--font-semibold); text-shadow: 0 1px 2px rgba(0, 0, 0, .25); box-shadow: 0 8px 24px -8px var(--glow-color); transition: transform .25s, box-shadow .25s, filter .25s; }
.button:hover { background-color: transparent; color: #fff; transform: translateY(-2px); box-shadow: 0 14px 32px -8px var(--glow-color); filter: brightness(1.07); }
.button--ghost, .button--ghost:hover { background-image: none; text-shadow: none; box-shadow: none; }
.button--ghost { background-color: transparent; border-color: var(--border-color); color: var(--title-color); }
.button--ghost:hover { border-color: var(--accent-color); background-color: rgba(146, 46, 255, .12); color: var(--title-color); transform: translateY(-2px); }
.light-theme .button:not(.button--ghost), .light-theme .button:not(.button--ghost):hover { color: #fff; }

/* ---------- section titles ---------- */
.section__title { position: relative; padding-bottom: 1rem; margin-bottom: 2.5rem; letter-spacing: .01em; }
.section__title::after { content: ""; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 3rem; height: 3px; border-radius: 3px; background: var(--brand-gradient); }
.skills__content, .about-box, .services__card, .contact__card, .work__card { border: 1px solid var(--border-color); }
.skills__content, .about-box, .services__card { border-radius: 1.25rem; }

/* ---------- header / navigation (logo on the start side, menu on the end side) ---------- */
.header { position: fixed; top: 0; left: 0; right: 0; width: 100%; background: transparent; }
/* the frosted background lives on a layer behind the content: a backdrop-filter on the header itself would
   turn it into the containing block of the fixed mobile menu panel */
.header::before { content: ""; position: absolute; inset: 0; z-index: -1; background: color-mix(in srgb, var(--body-color) 76%, transparent); -webkit-backdrop-filter: blur(14px) saturate(1.4); backdrop-filter: blur(14px) saturate(1.4); border-bottom: 1px solid var(--border-color); opacity: 0; transition: opacity .3s; pointer-events: none; }
.header.scroll-header::before, .header.nav-open::before { opacity: 1; }
.header.scroll-header, .header.nav-open { box-shadow: none; }
.header .nav { height: 4.25rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.nav__logo { display: inline-flex; align-items: center; flex: none; min-width: 0; font-family: 'Poppins', sans-serif; font-size: 1.35rem; font-weight: 600; background: linear-gradient(180deg, #fff, #9295A5); -webkit-background-clip: text; background-clip: text; color: transparent; }
.light-theme .nav__logo { background-image: linear-gradient(180deg, #20212A, #686B78); }
.nav__logo img { max-height: 2.6rem; width: auto; max-width: 100%; }
.nav__right { display: flex; align-items: center; gap: .6rem; }

.header .nav__menu { position: static; width: auto; max-width: none; margin: 0; padding: 0; border: 0; border-radius: 0; background: none; box-shadow: none; -webkit-backdrop-filter: none; backdrop-filter: none; overflow: visible; animation: none; transition: none; }
.header .nav__list { display: flex; flex-direction: row; align-items: center; justify-content: flex-start; gap: .15rem; margin: 0; padding: 0; }
.header .nav__link { position: relative; display: inline-flex; align-items: center; padding: .55rem .8rem; border-radius: .6rem; font-size: .9rem; font-weight: var(--font-medium); line-height: 1.2; color: var(--text-color-light); background: none; box-shadow: none; transform: none; transition: color .2s; }
.header .nav__link::after { content: ""; position: absolute; inset-inline: .8rem; bottom: .2rem; height: 2px; border-radius: 2px; background: var(--brand-gradient); transform: scaleX(0); transform-origin: 0 50%; transition: transform .3s cubic-bezier(.2, .8, .2, 1); }
[dir="rtl"] .header .nav__link::after { transform-origin: 100% 50%; }
.header .nav__link:hover, .header .nav__link.active-link { color: var(--title-color); background: none; box-shadow: none; transform: none; }
.header .nav__link:hover::after, .header .nav__link.active-link::after { transform: scaleX(1); }
.header .nav__lang { gap: .35rem; margin-inline-start: .35rem; padding: .4rem .75rem; border: 1px solid var(--border-color); border-radius: 3rem; font-size: .78rem; font-weight: 700; letter-spacing: .06em; }
.header .nav__lang::after { display: none; }
.header .nav__lang i { font-size: 1rem; }
.header .nav__lang:hover { border-color: var(--accent-color); background: rgba(146, 46, 255, .1); }
.header .nav__item--lang { margin: 0; padding: 0; border: 0; }
.header .nav__label { font-size: inherit; font-weight: inherit; opacity: 1; text-transform: uppercase; letter-spacing: .06em; }

.change-theme-btn { width: 2.5rem; height: 2.5rem; display: inline-grid; place-items: center; border: 1px solid var(--border-color); border-radius: 50%; background: transparent; color: var(--title-color); transition: border-color .2s, background .2s, box-shadow .2s; }
.change-theme-btn:hover { border-color: var(--accent-color); background: rgba(146, 46, 255, .1); box-shadow: 0 0 18px -4px var(--glow-color); }
.change-theme-btn .change-theme:hover { color: inherit; }

.nav__toggle { display: none; width: 2.5rem; height: 2.5rem; border: 1px solid var(--border-color); border-radius: .75rem; background: transparent; padding: 0; position: relative; }
.nav__toggle span { position: absolute; inset-inline: .7rem; height: 2px; border-radius: 2px; background: var(--title-color); transition: transform .3s, opacity .2s, top .3s; }
.nav__toggle span:nth-child(1) { top: .85rem; } .nav__toggle span:nth-child(2) { top: 1.17rem; } .nav__toggle span:nth-child(3) { top: 1.49rem; }
.nav-open .nav__toggle span:nth-child(1) { top: 1.17rem; transform: rotate(45deg); }
.nav-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav__toggle span:nth-child(3) { top: 1.17rem; transform: rotate(-45deg); }

@media screen and (max-width: 991px) {
  .nav__toggle { display: inline-block; }
  .header .nav__menu { position: fixed; top: 4.5rem; bottom: auto; left: 1rem; right: 1rem; padding: .6rem; border: 1px solid var(--border-color); border-radius: 1.25rem; background: color-mix(in srgb, var(--container-color) 96%, transparent); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); box-shadow: 0 24px 50px rgba(0, 0, 0, .45); opacity: 0; visibility: hidden; transform: translateY(-10px); transition: opacity .25s, transform .25s, visibility .25s; max-height: calc(100vh - 6rem); overflow-y: auto; }
  .header .nav__menu.is-open { opacity: 1; visibility: visible; transform: none; }
  .header .nav__list { flex-direction: column; align-items: stretch; gap: .1rem; }
  .header .nav__link { display: flex; padding: .85rem 1rem; font-size: 1rem; }
  .header .nav__link::after { inset-inline: 1rem; bottom: .45rem; }
  .header .nav__item--lang { margin-top: .4rem; padding-top: .6rem; border-top: 1px solid var(--border-color); }
  .header .nav__lang { margin: 0; width: fit-content; }
}
@media (prefers-reduced-motion: reduce) { .header .nav__menu, .header .nav__link::after, .nav__toggle span { transition: none; } }

/* ---------- hero ---------- */
.home { position: relative; isolation: isolate; overflow: hidden; padding-top: 7rem; padding-bottom: 3rem; }
.home__lights span { position: absolute; z-index: -1; border-radius: 50%; filter: blur(80px); opacity: .38; pointer-events: none; will-change: transform; animation: home-drift 20s ease-in-out infinite alternate; }
.home__lights span:nth-child(1) { width: 34rem; height: 34rem; top: -11rem; inset-inline-start: -9rem; background: radial-gradient(circle, #922EFF, transparent 68%); }
.home__lights span:nth-child(2) { width: 28rem; height: 28rem; bottom: -8rem; inset-inline-end: -7rem; background: radial-gradient(circle, #B14AFF, transparent 68%); animation-duration: 26s; animation-delay: -7s; }
.light-theme .home__lights span { opacity: .2; }
@keyframes home-drift { from { transform: translate3d(0, 0, 0) scale(1); } to { transform: translate3d(3rem, 2.5rem, 0) scale(1.12); } }
@media (prefers-reduced-motion: reduce) { .home__lights span { animation: none; } }

.home .home__container { padding-top: 1rem; row-gap: 3rem; }
.home__logo { display: block; height: clamp(4.5rem, 11vw, 7rem); width: auto; margin: 0 auto 1.5rem; filter: drop-shadow(0 0 26px var(--glow-color)); }
.home__greeting { color: var(--text-color-light); letter-spacing: .02em; }
.home__name { font-size: clamp(2.4rem, 7vw, 4.4rem); line-height: 1.2; margin-bottom: .6rem; letter-spacing: -.01em; background: linear-gradient(180deg, #ffffff 0%, #E5E7EF 38%, #9295A5 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.light-theme .home__name { background-image: linear-gradient(180deg, #20212A 0%, #3a3c4b 45%, #686B78 100%); }
.home__education { margin-bottom: 1rem; font-family: 'yekan', sans-serif; font-size: clamp(1.05rem, 2.4vw, 1.45rem); font-weight: var(--font-semibold); color: var(--link-color); }
.home__intro { max-width: 36rem; margin: 0 auto 2rem; line-height: 2; color: var(--text-color); }
.home__buttons { flex-wrap: wrap; gap: .9rem; }
.home__handle { background: linear-gradient(180deg, #922EFF, rgba(48, 32, 68, .35)); box-shadow: 0 30px 60px -20px var(--glow-color); }
.home__social-link { border: 1px solid var(--border-color); border-radius: .6rem; }
.home__social-link:hover { background: var(--brand-gradient); border-color: transparent; box-shadow: 0 0 18px -4px var(--glow-color); }

@media screen and (min-width: 992px) {
  .home { padding-top: 8rem; }
  .home .home__container { max-width: 1120px; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); align-items: center; column-gap: 4rem; min-height: calc(100vh - 11rem); }
  .home .home__data { text-align: start; }
  .home__logo { margin-inline: 0; }
  .home__intro { margin-inline: 0; }
  .home__buttons { justify-content: flex-start; }
  .home__handle { width: 300px; height: 440px; justify-self: end; }
  .home__img { width: 250px; }
}

/* ---------- projects ---------- */
.work__container.container { max-width: 1120px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.work__card.pcard { display: block; padding: 0; overflow: hidden; border-radius: 1.4rem; background: var(--container-color); transition: transform .35s cubic-bezier(.2, .8, .2, 1), border-color .3s, box-shadow .35s; }
.work__card.pcard:hover { transform: translateY(-6px); border-color: rgba(146, 46, 255, .55); box-shadow: 0 22px 44px -16px var(--glow-color); }
.pcard__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--dark-purple); }
.pcard__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(9, 11, 16, .6)); pointer-events: none; }
.pcard__media .work__img { width: 100%; height: 100%; object-fit: cover; margin: 0; border-radius: 0; transition: transform .7s cubic-bezier(.2, .8, .2, 1); }
.pcard:hover .pcard__media .work__img { transform: scale(1.06); }
.pcard__cat { position: absolute; z-index: 2; top: .8rem; inset-inline-start: .8rem; padding: .25rem .75rem; border-radius: 3rem; font-size: var(--smaller-font-size); font-weight: var(--font-semibold); color: #fff; background: rgba(9, 11, 16, .55); border: 1px solid rgba(255, 255, 255, .18); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.pcard__body { padding: 1.15rem 1.25rem 1.3rem; text-align: start; }
.pcard__title { font-size: 1.08rem; margin: 0 0 .5rem; color: var(--title-color); }
.pcard__desc { font-size: var(--small-font-size); line-height: 1.9; color: var(--text-color); margin-bottom: .9rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.pcard__tech { list-style: none; margin: 0 0 1.1rem; padding: 0; display: flex; flex-wrap: wrap; gap: .4rem; }
.pcard__tech li { padding: .2rem .7rem; border-radius: 3rem; font-size: var(--smaller-font-size); color: var(--link-color); background: rgba(146, 46, 255, .1); border: 1px solid rgba(146, 46, 255, .28); }
.pcard__links { display: flex; flex-wrap: wrap; gap: .6rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.pcard__btn { display: inline-flex; align-items: center; gap: .4rem; padding: .5rem 1rem; border-radius: .7rem; font-size: var(--small-font-size); font-weight: var(--font-semibold); color: var(--title-color); border: 1px solid var(--border-color); transition: border-color .2s, background .2s, transform .2s, box-shadow .2s; }
.pcard__btn:hover { border-color: var(--accent-color); background: rgba(146, 46, 255, .1); transform: translateY(-1px); }
.pcard__btn--primary { border-color: transparent; color: #fff; background-image: var(--brand-gradient); text-shadow: 0 1px 2px rgba(0, 0, 0, .25); }
.pcard__btn--primary:hover { background-color: transparent; border-color: transparent; box-shadow: 0 8px 20px -6px var(--glow-color); filter: brightness(1.07); }
.pcard__btn i { font-size: 1.1rem; }
.work__item { border-radius: 3rem; padding: .45rem 1.1rem; border: 1px solid transparent; transition: border-color .2s, color .2s, background .2s; }
.work__item:hover { color: var(--title-color); }
.work__item.active-work { color: #fff; background-image: var(--brand-gradient); border-color: transparent; }
.light-theme .work__item.active-work { color: #fff; }

/* ---------- footer ---------- */
.ft__role { margin: -.4rem 0 .8rem; font-size: var(--small-font-size); font-weight: var(--font-semibold); color: var(--link-color); letter-spacing: .03em; }
.ft::before { height: 2px; background: linear-gradient(90deg, transparent, #922EFF 30%, #C56BFF 70%, transparent); }

/* ---------- light theme polish ---------- */
.light-theme .header::before { background: color-mix(in srgb, #F8F9FC 82%, transparent); }
.light-theme .header .nav__menu.is-open { box-shadow: 0 24px 50px rgba(32, 33, 42, .14); }
.light-theme .pcard__cat { color: #20212A; background: rgba(255, 255, 255, .78); border-color: rgba(0, 0, 0, .08); }
.light-theme .work__card.pcard:hover { box-shadow: 0 22px 44px -18px var(--glow-color); }
.light-theme .change-theme-btn { color: var(--title-color); }
.light-theme .skills__content, .light-theme .about-box, .light-theme .services__card { box-shadow: 0 2px 14px rgba(32, 33, 42, .06); }

/* ---------- hero social links: a quiet row at the end of the hero (never over the buttons) ---------- */
.home__social { position: absolute; top: auto; left: auto; right: auto; inset-inline-start: 0; inset-inline-end: auto; bottom: 4.5rem; display: flex; flex-direction: row; gap: .5rem; }
@media screen and (min-width: 992px) { .home__social { bottom: 3rem; } .home__scroll { bottom: 3rem; } }
@media screen and (max-width: 991px) { .home__social { inset-inline-start: auto; inset-inline-end: 0; bottom: 6rem; flex-direction: column; } }

/* ---------- skills: balanced card grid ---------- */
.skills__container.container { max-width: 1120px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; justify-content: center; }
.skills__content { padding: 1.5rem 1.4rem; background: var(--container-color); }
.skills__title { color: var(--link-color); }