/* ==========================================================
   Saraswati Engineering Works – custom CSS
   Layout, spacing, type, colour, borders and simple hovers live
   in Tailwind classes in the HTML. This file only holds what
   utilities can't express: keyframes, pseudo-elements, SVG styling,
   JS-driven states and CSS variables.
   ========================================================== */
:root{
  /* ===== BRAND PALETTE from the SEW logo =====
     orange  #F47820  primary accent (buttons, highlights)   orange-light #FF8F3F  hover
     black   #171717  headings, dark sections                 deep #0F0F0F  darker sections
     grey    #5A5A5A  body text                               light #F5F5F5  page tint   line #E5E5E5  borders
     (HTML uses these hex codes directly - keep them in sync here) */
  --orange:#F47820;
  --orange-light:#FF8F3F;
  --black:#171717;
  --deep:#0F0F0F;
  --ease:cubic-bezier(.22,.8,.3,1);
  --spring:cubic-bezier(.34,1.56,.64,1);
  --header-h:86px;
}

.container{--bs-gutter-x:24px;width:100%;padding-right:calc(var(--bs-gutter-x)*.5);padding-left:calc(var(--bs-gutter-x)*.5);margin-right:auto;margin-left:auto}
@media (min-width:576px){.container{max-width:540px}}
@media (min-width:768px){.container{max-width:720px}}
@media (min-width:992px){.container{max-width:960px}}
@media (min-width:1200px){.container{max-width:1140px}}
@media (min-width:1400px){.container{max-width:1320px}}

:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
.orange_text{color:var(--orange)}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes spin_back{to{transform:rotate(-360deg)}}

/* ---------- Scroll progress bar (CSS scroll timeline) ---------- */
.scroll_progress{display:none}
@supports (animation-timeline: scroll()){
  .scroll_progress{display:block;position:fixed;inset:0 0 auto;height:3px;z-index:60;background:var(--orange);transform-origin:0 50%;
    animation:grow linear both;animation-timeline:scroll(root)}
  @keyframes grow{from{transform:scaleX(0)}to{transform:scaleX(1)}}
}

/* ---------- Buttons: magnetic pull, shine, outline wipe ---------- */
.site_button{--tx:0px;--ty:0px;--lift:0px;
  transform:translate(var(--tx),calc(var(--ty) - var(--lift)));
  transition:transform .35s var(--ease),box-shadow .35s,background-color .35s,color .3s,border-color .3s}
.site_button>span{position:relative;z-index:2}
.site_button:hover{--lift:3px}
.site_button:active{--lift:0px;transition-duration:.1s}
.site_button_arrow{position:relative;z-index:2;flex:none;width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;transition:transform .35s var(--spring)}
.site_button:hover .site_button_arrow{transform:translateX(5px)}
.site_button_primary{color:var(--black);background:var(--orange);box-shadow:0 8px 22px -10px #F47820}
.site_button_primary:hover{background:var(--orange-light);box-shadow:0 16px 30px -12px #F47820}
.site_button_primary::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(105deg,transparent 30%,#FFFFFF66 50%,transparent 70%);transform:translateX(-120%);transition:transform .8s var(--ease)}
.site_button_primary:hover::after{transform:translateX(120%)}
.site_button_outline::before{content:"";position:absolute;inset:0;z-index:1;background:#FFFFFF;border-radius:inherit;transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.site_button_outline:hover{color:var(--black);border-color:#FFFFFF}
.site_button_outline:hover::before{transform:scaleX(1)}

/* ---------- Header: nav underline, burger to X, scrolled shadow ---------- */
.header_bar{transition:box-shadow .3s}
.header_bar.is_scrolled{box-shadow:0 10px 30px -18px #00000066}
/* nav: one orange line (.nav_pill) slides between links; hovered / active link text turns orange.
   Position is set by main.js (moves on hover, returns to the active page link on mouse leave). */
.header_link:hover,.header_link.is_active{color:var(--orange)}
.nav_pill{position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--orange);pointer-events:none;z-index:20;transition:left .35s ease,width .35s ease;will-change:left,width}
#mobile_menu a.is_active{color:var(--orange)}
.header_menu_button span{transition:transform .3s var(--ease),opacity .2s}
.header_menu_button[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.header_menu_button[aria-expanded="true"] span:nth-child(2){opacity:0}
.header_menu_button[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero: blueprint grid, slash stripes, gears, load sequence ---------- */
.hero_grid{background-image:linear-gradient(#FFFFFF0D 1px,transparent 1px),linear-gradient(90deg,#FFFFFF0D 1px,transparent 1px);background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at 70% 45%,#000 5%,transparent 70%);mask-image:radial-gradient(ellipse at 70% 45%,#000 5%,transparent 70%)}
.hero_glow{background:radial-gradient(circle,#F4782040 0%,transparent 65%)}
.hero_slash{clip-path:polygon(70% 0,78% 0,46% 100%,38% 100%)}
.hero_slash_two{clip-path:polygon(84% 0,87% 0,55% 100%,52% 100%)}
.hero_pulse{box-shadow:0 0 0 0 #F47820B3;animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px #F4782000}100%{box-shadow:0 0 0 0 #F4782000}}
/* gears: transform-origin is each gear's own centre (SVG user units) */
.hero_gear{stroke-linejoin:round}
.hero_gear_big{transform-origin:200px 200px;animation:spin 60s linear infinite}
.hero_gear_small{transform-origin:423px 292px;animation:spin_back 34s linear infinite}
.hero_gear_arc{transform-origin:200px 200px;animation:spin_back 20s linear infinite}
/* page-load order: tag, headline lines, lead text, buttons, visual, strip */
.hero_load{opacity:0;transform:translateY(18px);animation:loadIn .8s var(--ease) forwards}
.hero_load_up{transform:translateY(110%);animation:upIn .9s var(--ease) forwards}
@keyframes loadIn{to{opacity:1;transform:none}}
@keyframes upIn{to{transform:none}}
.hero_tag{animation-delay:0s}
.hero_title span:nth-child(1) .hero_load_up{animation-delay:.1s}
.hero_title span:nth-child(2) .hero_load_up{animation-delay:.22s}
.hero_title span:nth-child(3) .hero_load_up{animation-delay:.34s}
.hero_lead{animation-delay:.5s}
.hero_text{animation-delay:.6s}
.hero_actions{animation-delay:.7s}
.hero_visual{animation-delay:.3s}
.hero_strip{animation-delay:.9s}
@keyframes cue{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* ---------- Hero feature strip ---------- */
.strip_item .strip_icon{transition:background .35s,color .35s,transform .5s var(--spring)}
.strip_item:hover .strip_icon{background:var(--orange);color:var(--black);transform:rotate(-8deg) scale(1.08)}

/* ---------- Process timeline (scroll-driven: main.js sets --p on [data-chain] and .is_lit on each .proc_node) ---------- */
.proc_track{position:absolute;left:27px;top:28px;bottom:28px;width:2px;background:#E5E5E5}
.proc_fill{position:absolute;inset:0;background:var(--orange);transform-origin:top;transform:scaleY(var(--p,1));transition:transform .25s linear}
.proc_head{position:absolute;left:50%;top:calc(var(--p,1) * 100%);width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 6px #F4782033;transition:top .25s linear,left .25s linear}
.proc_dot{background:var(--orange);border-color:var(--orange);color:var(--black);position:relative;z-index:2;transition:background .45s,border-color .45s,color .45s,transform .45s var(--spring),box-shadow .45s}
.proc_node.is_lit .proc_dot{transform:scale(1.08);box-shadow:0 0 0 7px #F4782026}
.proc_body{transition:opacity .45s,transform .3s var(--ease),border-color .3s,box-shadow .3s}
.proc_img{transition:filter .7s,transform .7s var(--ease)}
.scroll_enabled .proc_node:not(.is_lit) .proc_dot{background:#FFFFFF;border-color:#E5E5E5;color:#9A9A9A;box-shadow:none;transform:none}
.scroll_enabled .proc_node:not(.is_lit) .proc_body{opacity:.55}
.scroll_enabled .proc_node:not(.is_lit) .proc_img{filter:grayscale(100%)}
@media (min-width:1024px){
  .proc_track{left:12.5%;right:12.5%;top:27px;bottom:auto;width:auto;height:2px}
  .proc_fill{transform-origin:left;transform:scaleX(var(--p,1))}
  .proc_head{top:50%;left:calc(var(--p,1) * 100%);margin:-7px 0 0 -7px}
}

/* ---------- Form validation (main.js adds .is_invalid and fills .field_error) ---------- */
.field_error{display:none;margin-top:6px;font-size:13px;line-height:18px;color:#D93025}
.is_invalid + .field_error,.is_invalid ~ .field_error{display:block}
input.is_invalid,select.is_invalid,textarea.is_invalid{border-color:#D93025}
.form_success{display:none}
.form_success.is_shown{display:block}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .hero_load{opacity:1;transform:none}
  .hero_load_up{transform:none}
}