/* ==========================================================================
   Mohammed Anwar Omran — Personal Website
   Design system: premium dark (navy/black) with blue+sky accents
   Supports: light/dark, RTL/LTR, fully responsive
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --bg: #060b18;
  --bg-soft: #0b1224;
  --bg-elev: #101a33;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(120, 180, 255, 0.28);

  --text: #eaf1ff;
  --text-soft: #a9b7d4;
  --text-dim: #7d8bad;

  --brand: #2f7cf6;
  --brand-2: #38bdf8;
  --brand-grad: linear-gradient(120deg, #2f7cf6 0%, #38bdf8 55%, #22d3ee 100%);
  --accent: #22d3ee;

  --shadow-sm: 0 4px 18px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 12px 40px rgba(2, 10, 30, 0.45);
  --shadow-lg: 0 26px 70px rgba(2, 10, 30, 0.55);
  --glow: 0 0 0 1px rgba(56, 189, 248, 0.25), 0 10px 40px rgba(56, 189, 248, 0.18);

  --radius: 18px;
  --radius-lg: 26px;
  --radius-sm: 12px;

  --maxw: 1200px;
  --gutter: clamp(1.1rem, 4vw, 2.4rem);
  --section-pad: clamp(4rem, 10vw, 8rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-ar: "Tajawal", "Cairo", system-ui, sans-serif;
  --font-en: "Outfit", "Cairo", system-ui, sans-serif;
  --font: var(--font-ar);
}

html[lang="en"] { --font: var(--font-en); }

html[data-theme="light"] {
  --bg: #eef3fb;
  --bg-soft: #e6ecf7;
  --bg-elev: #ffffff;
  --surface: rgba(12, 30, 70, 0.035);
  --surface-2: rgba(12, 30, 70, 0.06);
  --border: rgba(12, 30, 70, 0.10);
  --border-strong: rgba(47, 124, 246, 0.30);
  --text: #0b1b3a;
  --text-soft: #3f5077;
  --text-dim: #64749a;
  --shadow-md: 0 12px 40px rgba(20, 40, 90, 0.12);
  --shadow-lg: 0 26px 70px rgba(20, 40, 90, 0.16);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .4s var(--ease), color .4s var(--ease);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-pad); position: relative; }
.section--alt { background: var(--bg-soft); }

/* ---------- Background canvas ---------- */
.bg-canvas { position: fixed; inset: 0; z-index: -1; overflow: hidden; }
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120, 170, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 170, 255, 0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 20%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 20%, #000 0%, transparent 78%);
}
html[data-theme="light"] .bg-grid { opacity: .5; }
.bg-glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55; }
.glow-1 { width: 520px; height: 520px; top: -160px; inset-inline-start: -120px; background: radial-gradient(circle, rgba(47,124,246,.55), transparent 70%); }
.glow-2 { width: 620px; height: 620px; bottom: -220px; inset-inline-end: -180px; background: radial-gradient(circle, rgba(34,211,238,.35), transparent 70%); }
html[data-theme="light"] .bg-glow { opacity: .35; }
#particles { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }

/* ---------- Header ---------- */
.header {
  position: fixed; top: 0; inset-inline: 0; z-index: 100;
  transition: background .35s var(--ease), box-shadow .35s var(--ease), backdrop-filter .35s;
}
.header.scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 74px; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .7rem; font-weight: 800; font-size: 1.05rem; }
.brand__mark {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  background: var(--brand-grad); color: #04122b; font-weight: 900; font-size: 1.2rem;
  box-shadow: 0 6px 20px rgba(47,124,246,.45);
}
.brand__text { letter-spacing: .2px; }

.nav__list { display: flex; gap: .35rem; }
.nav__link {
  position: relative; padding: .5rem .85rem; border-radius: 10px; font-weight: 600;
  color: var(--text-soft); font-size: .95rem; transition: color .25s, background .25s;
}
.nav__link::after {
  content: ""; position: absolute; inset-inline: .85rem; bottom: .3rem; height: 2px;
  background: var(--brand-grad); border-radius: 2px; transform: scaleX(0); transform-origin: center;
  transition: transform .3s var(--ease);
}
.nav__link:hover { color: var(--text); background: var(--surface); }
.nav__link.active { color: var(--text); }
.nav__link.active::after { transform: scaleX(1); }

.header__actions { display: flex; align-items: center; gap: .5rem; }
.icon-btn {
  display: inline-flex; align-items: center; gap: .4rem; height: 42px; padding: 0 .7rem;
  border-radius: 12px; background: var(--surface); border: 1px solid var(--border);
  color: var(--text); transition: transform .2s var(--ease), background .25s, border-color .25s;
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--border-strong); transform: translateY(-2px); }
.icon-btn__label { font-size: .82rem; font-weight: 700; letter-spacing: .5px; }
.icon-sun { display: none; }
html[data-theme="light"] .icon-sun { display: block; }
html[data-theme="light"] .icon-moon { display: none; }

.menu-btn { display: none; flex-direction: column; gap: 5px; width: 44px; height: 42px; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); align-items: center; justify-content: center; }
.menu-btn span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s var(--ease); }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.scroll-progress { height: 3px; width: 0; background: var(--brand-grad); box-shadow: 0 0 12px rgba(56,189,248,.8); }

/* ---------- Buttons ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.4rem; border-radius: 14px; font-weight: 700; font-size: .95rem;
  border: 1px solid transparent; overflow: hidden; transition: transform .25s var(--ease), box-shadow .25s, background .25s, color .25s;
  white-space: nowrap;
}
.btn::before {
  content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent, rgba(255,255,255,.25), transparent);
  transform: translateX(-120%); transition: transform .6s var(--ease);
}
.btn:hover::before { transform: translateX(120%); }
.btn--primary { background: var(--brand-grad); color: #04122b; box-shadow: 0 10px 30px rgba(47,124,246,.35); }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(47,124,246,.5); }
.btn--ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn--ghost:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--surface-2); }
.btn--accent { background: linear-gradient(120deg, #1ec8b0, #22d3ee); color: #04122b; box-shadow: 0 10px 30px rgba(34,211,238,.32); }
.btn--accent:hover { transform: translateY(-3px); }
.btn--block { width: 100%; }
.btn--sm { padding: .55rem 1rem; font-size: .85rem; border-radius: 11px; }

/* ---------- Section heads ---------- */
.section__head { max-width: 760px; margin-bottom: clamp(2rem, 5vw, 3.4rem); }
.section__tag {
  display: inline-block; font-family: var(--font-en); font-weight: 800; font-size: .8rem; letter-spacing: 2px;
  color: var(--brand-2); padding: .3rem .8rem; border: 1px solid var(--border-strong); border-radius: 999px;
  background: color-mix(in srgb, var(--brand-2) 8%, transparent); margin-bottom: 1rem;
}
.section__title { font-size: clamp(1.7rem, 4.5vw, 2.7rem); font-weight: 800; margin: 0 0 .6rem; line-height: 1.25; }
.section__subtitle { color: var(--text-soft); font-size: clamp(1rem, 2.2vw, 1.12rem); margin: 0; }

/* ---------- Hero ---------- */
.hero { position: relative; padding-top: clamp(7rem, 16vw, 10rem); padding-bottom: var(--section-pad); min-height: 100vh; display: flex; align-items: center; }
.hero__inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero__greeting { color: var(--brand-2); font-weight: 700; letter-spacing: 1px; }
.hero__name {
  font-size: clamp(2.1rem, 6vw, 3.6rem); font-weight: 900; line-height: 1.15; margin: .4rem 0 .8rem;
  background: linear-gradient(120deg, var(--text) 20%, var(--brand-2) 70%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__title { font-size: clamp(.95rem, 2.4vw, 1.15rem); font-weight: 600; color: var(--text-soft); margin: 0 0 1rem; max-width: 40ch; }
.hero__tagline { color: var(--text-soft); font-size: clamp(1rem, 2.3vw, 1.1rem); max-width: 52ch; margin: 0 0 1.8rem; }
.hero__buttons { display: flex; flex-wrap: wrap; gap: .8rem; margin-bottom: 1.8rem; }
.hero__social { display: flex; gap: .6rem; }
.hero__social a {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-soft);
  transition: transform .25s var(--ease), color .25s, border-color .25s, background .25s;
}
.hero__social a:hover { transform: translateY(-4px); color: var(--brand-2); border-color: var(--border-strong); background: var(--surface-2); }

.hero__media { position: relative; display: grid; place-items: center; }
.hero__photo-frame { position: relative; width: min(360px, 80vw); aspect-ratio: 1; }
.hero__photo-ring {
  position: absolute; inset: -14px; border-radius: 34px; padding: 2px;
  background: conic-gradient(from 0deg, var(--brand), var(--accent), transparent 55%, var(--brand));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: spin 9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero__photo {
  width: 100%; height: 100%; object-fit: cover; border-radius: 28px; border: 1px solid var(--border-strong);
  background: var(--bg-elev); box-shadow: var(--shadow-lg);
}
.hero__badge {
  position: absolute; bottom: 14px; inset-inline-start: 14px; display: inline-flex; align-items: center; gap: .5rem;
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(10px);
  padding: .45rem .85rem; border-radius: 999px; border: 1px solid var(--border); font-size: .82rem; font-weight: 600;
}
.hero__badge .dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 10px #22c55e; animation: pulse 1.8s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }

.scroll-cue { position: absolute; bottom: 22px; inset-inline-start: 50%; translate: -50% 0; width: 26px; height: 42px; border: 2px solid var(--border-strong); border-radius: 14px; display: grid; justify-items: center; padding-top: 7px; }
.scroll-cue span { width: 4px; height: 8px; border-radius: 2px; background: var(--brand-2); animation: cue 1.6s infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(14px); opacity: 0; } }

/* ---------- About ---------- */
.about__grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(2rem, 5vw, 3.5rem); align-items: start; }
.about__text p { color: var(--text-soft); font-size: 1.05rem; margin: 0 0 1rem; }
.about__facts { display: grid; gap: .8rem; }
.fact {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 1rem 1.2rem; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border); transition: transform .25s var(--ease), border-color .25s;
}
.fact:hover { transform: translateX(4px); border-color: var(--border-strong); }
.fact__label { color: var(--text-dim); font-size: .88rem; }
.fact__value { font-weight: 700; }

/* ---------- Cards ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.4rem; }
.cards-grid--services { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

.card {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform .35s var(--ease), border-color .35s, box-shadow .35s, background .35s;
  display: flex; flex-direction: column;
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(56,189,248,.16), transparent 45%);
  opacity: 0; transition: opacity .35s;
}
.card:hover { transform: translateY(-8px); border-color: var(--border-strong); box-shadow: var(--shadow-md); background: var(--surface-2); }
.card:hover::after { opacity: 1; }

.card__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-elev); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.card:hover .card__media img { transform: scale(1.07); }
.card__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(6,11,24,.85)); }
.card__tech-badge { position: absolute; top: .8rem; inset-inline-start: .8rem; z-index: 2; }

.card__body { padding: 1.2rem 1.25rem 1.4rem; display: flex; flex-direction: column; gap: .7rem; flex: 1; }
.card__title { font-size: 1.15rem; font-weight: 800; margin: 0; }
.card__desc { color: var(--text-soft); font-size: .95rem; margin: 0; flex: 1; }
.card__actions { margin-top: .3rem; }

.tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag {
  font-family: var(--font-en); font-size: .74rem; font-weight: 700; letter-spacing: .4px;
  padding: .28rem .65rem; border-radius: 999px; color: var(--brand-2);
  background: color-mix(in srgb, var(--brand-2) 10%, transparent); border: 1px solid var(--border-strong);
}

/* Service card */
.service-card { padding: 1.5rem 1.4rem; text-align: start; }
.service-card .icon-wrap {
  width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center; margin-bottom: 1rem;
  background: linear-gradient(140deg, color-mix(in srgb, var(--brand) 22%, transparent), color-mix(in srgb, var(--accent) 18%, transparent));
  border: 1px solid var(--border-strong); color: var(--brand-2);
  transition: transform .3s var(--ease);
}
.service-card:hover .icon-wrap { transform: translateY(-4px) rotate(-4deg); }
.service-card h3 { font-size: 1.05rem; margin: 0 0 .5rem; font-weight: 800; }
.service-card p { color: var(--text-soft); font-size: .92rem; margin: 0 0 1.1rem; }
.service-card .card__actions { margin-top: auto; }

/* ---------- Skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.3rem; }
.skill-card {
  padding: 1.5rem 1.4rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.skill-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.skill-card__head { display: flex; align-items: center; gap: .8rem; margin-bottom: 1rem; }
.skill-card__head .icon-wrap {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; color: var(--brand-2);
  background: color-mix(in srgb, var(--brand) 16%, transparent); border: 1px solid var(--border-strong);
}
.skill-card__head h3 { font-size: 1.08rem; margin: 0; font-weight: 800; }
.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  padding: .4rem .8rem; border-radius: 10px; font-size: .88rem; font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-soft);
  transition: transform .2s var(--ease), color .2s, border-color .2s;
}
.chip:hover { transform: translateY(-2px); color: var(--text); border-color: var(--border-strong); }

/* ---------- Timeline ---------- */
.qual__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 3.5rem); }
.qual__col-title { font-size: 1.25rem; font-weight: 800; margin: 0 0 1.5rem; padding-inline-start: .9rem; border-inline-start: 4px solid transparent; border-image: var(--brand-grad) 1; }
.timeline { position: relative; padding-inline-start: 1.6rem; }
.timeline::before { content: ""; position: absolute; inset-inline-start: 5px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--brand), var(--accent), transparent); }
.tl-item { position: relative; padding: 0 0 1.6rem; }
.tl-item::before {
  content: ""; position: absolute; inset-inline-start: -1.6rem; top: .4rem; width: 12px; height: 12px; border-radius: 50%;
  background: var(--brand-grad); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 22%, transparent);
}
.tl-item h4 { margin: 0 0 .25rem; font-size: 1.02rem; font-weight: 700; }
.tl-item .tl-org { color: var(--text-soft); font-size: .92rem; margin: 0; }
.tl-item .tl-meta { display: inline-block; margin-top: .5rem; font-size: .8rem; font-weight: 700; color: var(--brand-2); padding: .2rem .6rem; border-radius: 8px; background: color-mix(in srgb, var(--brand-2) 10%, transparent); }

/* ---------- Why grid ---------- */
.why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.3rem; }
.why-card { padding: 1.5rem 1.4rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); transition: transform .3s var(--ease), border-color .3s, box-shadow .3s; }
.why-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.why-card .icon-wrap { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 1rem; color: var(--brand-2); background: color-mix(in srgb, var(--brand) 16%, transparent); border: 1px solid var(--border-strong); }
.why-card h3 { font-size: 1.05rem; margin: 0 0 .45rem; font-weight: 800; }
.why-card p { color: var(--text-soft); font-size: .92rem; margin: 0; }

/* ---------- Contact ---------- */
.contact__grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2rem, 5vw, 3.4rem); align-items: start; }
.contact__info { display: grid; gap: 1rem; }
.info-card { display: flex; align-items: center; gap: 1rem; padding: 1.2rem 1.3rem; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); transition: transform .25s var(--ease), border-color .25s; }
.info-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.info-card .icon-wrap { width: 50px; height: 50px; flex-shrink: 0; border-radius: 14px; display: grid; place-items: center; color: var(--brand-2); background: color-mix(in srgb, var(--brand) 16%, transparent); border: 1px solid var(--border-strong); }
.info-card .info-label { font-size: .82rem; color: var(--text-dim); }
.info-card .info-value { font-weight: 700; word-break: break-word; direction: ltr; text-align: start; }
.info-card .info-value.rtl-text { direction: inherit; }
.contact__info .btn { margin-top: .2rem; }
.info-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }

.contact__form { padding: clamp(1.4rem, 4vw, 2rem); border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-md); display: grid; gap: 1.1rem; }
.field { display: grid; gap: .5rem; }
.field label { font-weight: 600; font-size: .92rem; color: var(--text-soft); }
.field input, .field textarea {
  width: 100%; padding: .85rem 1rem; border-radius: var(--radius-sm); font-family: inherit; font-size: .95rem;
  background: var(--bg); color: var(--text); border: 1px solid var(--border); transition: border-color .25s, box-shadow .25s;
  resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 18%, transparent); }
.field.has-error input, .field.has-error textarea { border-color: #ef4444; box-shadow: 0 0 0 4px rgba(239,68,68,.14); }
.field__error { color: #f87171; font-size: .82rem; min-height: 0; display: none; }
.field.has-error .field__error { display: block; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }
.form-status { margin: 0; font-size: .92rem; font-weight: 600; padding: 0; }
.form-status.ok { color: #34d399; }
.form-status.err { color: #f87171; }
.form-status.info { color: var(--brand-2); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding-block: 2.5rem; }
.footer__inner { display: grid; gap: 1.4rem; text-align: center; justify-items: center; }
.footer__brand { display: flex; align-items: center; gap: .9rem; text-align: start; }
.footer__brand p { margin: .15rem 0 0; color: var(--text-dim); font-size: .88rem; }
.footer__social { display: flex; gap: .6rem; }
.footer__social a { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: var(--surface); border: 1px solid var(--border); color: var(--text-soft); transition: transform .25s var(--ease), color .25s, border-color .25s; }
.footer__social a:hover { transform: translateY(-4px); color: var(--brand-2); border-color: var(--border-strong); }
.footer__copy { color: var(--text-dim); font-size: .88rem; margin: 0; }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; inset-inline-end: 1.4rem; bottom: 1.4rem; z-index: 90;
  width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center;
  background: var(--brand-grad); color: #04122b; border: none; box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; transform: translateY(16px); transition: .35s var(--ease);
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: var(--gutter); opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
.modal.open { opacity: 1; visibility: visible; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(2, 6, 18, .72); backdrop-filter: blur(6px); }
.modal__dialog {
  position: relative; width: min(720px, 100%); max-height: 88vh; overflow: auto; background: var(--bg-elev);
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(.97); transition: transform .35s var(--ease);
}
.modal.open .modal__dialog { transform: translateY(0) scale(1); }
.modal__close { position: absolute; top: .8rem; inset-inline-end: .8rem; z-index: 2; width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 80%, transparent); color: var(--text); font-size: 1.4rem; line-height: 1; }
.modal__close:hover { background: var(--surface-2); }
.modal__media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.modal__media img { width: 100%; height: 100%; object-fit: cover; }
.modal__body { padding: 1.5rem 1.6rem 1.8rem; }
.modal__body h3 { margin: 0 0 .7rem; font-size: 1.4rem; }
.modal__body .tags { margin-bottom: .9rem; }
.modal__body p { color: var(--text-soft); margin: 0; }
.modal__dialog--form { width: min(560px, 100%); padding: 1.6rem 1.6rem 1.8rem; }
.modal__dialog--form h3 { margin: 0 0 .5rem; font-size: 1.3rem; padding-inline-end: 2.5rem; }
.modal__dialog--form .muted { color: var(--text-dim); font-size: .92rem; margin: 0 0 1.1rem; }
.modal__dialog--form .field { margin-bottom: .9rem; }
.modal__dialog--form label { display: block; font-size: .9rem; margin-bottom: .35rem; color: var(--text-soft); }
.modal__dialog--form input, .modal__dialog--form textarea {
  width: 100%; padding: .75rem .9rem; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-family: inherit; font-size: .95rem; resize: vertical;
}
.modal__dialog--form input:focus, .modal__dialog--form textarea:focus { outline: none; border-color: var(--brand-2); }
.cv-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: .4rem; }
.cv-actions .btn { flex: 1 1 auto; justify-content: center; }
.cv-have { margin: .9rem 0 0; font-size: .88rem; }
.cv-have a { color: var(--brand-2); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Consent modal ---------- */
.consent-list { margin: 0 0 1rem; padding-inline-start: 1.2rem; display: grid; gap: .5rem; }
.consent-list li { color: var(--text-soft); font-size: .92rem; line-height: 1.6; }
.consent-check {
  display: flex; gap: .6rem; align-items: flex-start; margin-bottom: 1.1rem;
  padding: .8rem .9rem; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border); font-size: .92rem; cursor: pointer;
}
.consent-check input { margin-top: .2rem; width: 1.05rem; height: 1.05rem; flex: none; accent-color: var(--brand-2); }
.consent-check span { color: var(--text-soft); }

/* ---------- Grades button ---------- */
.icon-btn--text { width: auto; gap: .45rem; padding: 0 .8rem; }

/* ---------- Grades panel (collapsible, hidden by default) ---------- */
.grades-panel {
  position: fixed; inset: 0; z-index: 190; display: grid; place-items: start center;
  padding: clamp(.8rem, 4vw, 3rem) var(--gutter);
  overflow-y: auto; background: rgba(2, 6, 18, .78); backdrop-filter: blur(8px);
  opacity: 0; visibility: hidden; transition: opacity .35s var(--ease), visibility .35s;
}
.grades-panel.open { opacity: 1; visibility: visible; }
.grades-panel__inner {
  width: min(1080px, 100%); background: var(--bg-elev); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: clamp(1.1rem, 3vw, 2rem);
  transform: translateY(-18px); transition: transform .4s var(--ease);
}
.grades-panel.open .grades-panel__inner { transform: none; }
.grades-panel__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1.2rem; }
.grades-panel__title { margin: 0; font-size: clamp(1.25rem, 3vw, 1.7rem); }
.grades-panel__subtitle { margin: .3rem 0 0; color: var(--text-dim); font-size: .92rem; }
.grades-panel__close { width: 40px; height: 40px; flex: none; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 1.5rem; line-height: 1; }
.grades-panel__close:hover { background: var(--surface-2); }

.grade-level { margin-bottom: 1.4rem; }
.grade-level__head {
  display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: .4rem;
  padding: .55rem .9rem; border-radius: var(--radius-sm); margin-bottom: .8rem;
  background: var(--brand-grad); color: #04122b; font-weight: 800;
}
.grade-level__year { font-size: .82rem; font-weight: 700; opacity: .85; }
.grade-sem { margin-bottom: 1rem; }
.grade-sem__title { font-size: .98rem; font-weight: 700; margin: 0 0 .5rem; color: var(--text); display: flex; align-items: center; gap: .5rem; }
.grade-sem__title::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand-2); flex: none; }
.grade-sem__pending {
  padding: .9rem 1rem; border-radius: var(--radius-sm); border: 1px dashed var(--border-strong);
  background: var(--surface); color: var(--text-dim); font-size: .92rem; text-align: center;
}
.grade-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.grade-table th, .grade-table td { padding: .55rem .7rem; text-align: start; border-bottom: 1px solid var(--border); }
.grade-table th { font-weight: 700; color: var(--text-soft); font-size: .82rem; text-transform: none; }
.grade-table td.num, .grade-table th.num { text-align: center; width: 88px; font-variant-numeric: tabular-nums; }
.grade-table td.grade-val { font-weight: 700; }
.grade-badge { display: inline-block; padding: .18rem .6rem; border-radius: 999px; font-size: .78rem; font-weight: 700; }
.grade-badge--pass { background: rgba(34, 197, 94, .16); color: #22c55e; }
.grade-badge--fail { background: rgba(239, 68, 68, .16); color: #ef4444; }
.grade-sem__avg { margin-top: .5rem; font-size: .86rem; color: var(--text-dim); text-align: end; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .hero__content { display: grid; justify-items: center; }
  .hero__title, .hero__tagline { max-width: 60ch; }
  .hero__buttons { justify-content: center; }
  .hero__media { order: -1; margin-bottom: 1rem; }
  .about__grid { grid-template-columns: 1fr; }
  .qual__grid { grid-template-columns: 1fr; }
  .section__head { text-align: center; margin-inline: auto; }
}
@media (max-width: 900px) {
  .nav {
    position: fixed; inset: 74px 0 auto 0; background: color-mix(in srgb, var(--bg) 96%, transparent);
    backdrop-filter: blur(18px); border-bottom: 1px solid var(--border);
    max-height: 0; overflow: hidden; transition: max-height .4s var(--ease);
  }
  .nav.open { max-height: 480px; }
  .nav__list { flex-direction: column; padding: 1rem var(--gutter); gap: .2rem; }
  .nav__link { display: block; padding: .85rem 1rem; font-size: 1rem; }
  .nav__link::after { display: none; }
  .nav__link.active { background: var(--surface); }
  .menu-btn { display: flex; }
  .contact__grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .brand__text { display: none; }
  .icon-btn__label { display: none; }
  .hero__buttons .btn { flex: 1 1 100%; }
  .info-buttons { grid-template-columns: 1fr; }
  .section__title { font-size: 1.6rem; }
  .hero__badge { inset-inline-start: 50%; transform: translateX(-50%); }
  html[dir="ltr"] .hero__badge { transform: translateX(50%); }
  /* Grades panel: keep the button label, it is the main entry point */
  .icon-btn--text { padding: 0 .55rem; }
  .grade-table { font-size: .86rem; }
  .grade-table th, .grade-table td { padding: .45rem .5rem; }
  .grade-table td.num, .grade-table th.num { width: 62px; }
  .grades-panel__head { flex-direction: column; }
  .cv-actions .btn { flex: 1 1 100%; }
}

/* Draft preview banner (index.html?preview=1) — fixed at the bottom so it never
   collides with the fixed header. */
.preview-banner { position: fixed; inset-inline: 0; bottom: 0; z-index: 300; display: flex; align-items: center;
  justify-content: center; gap: .4rem; flex-wrap: wrap; text-align: center; padding: .55rem 1rem;
  font-size: .86rem; background: linear-gradient(135deg, #f59e0b, #f97316); color: #241000;
  font-weight: 600; box-shadow: 0 -8px 24px rgba(0,0,0,.25); }

/* Print */
@media print {
  .header, .back-to-top, .bg-canvas, .hero__buttons, .contact__form, .scroll-cue { display: none !important; }
  body { background: #fff; color: #000; }
}