/* =========================================================
   TOKENS
   ========================================================= */
:root{
  --df-primary:      #0D3B66;
  --df-primary-dark: #082744;
  --df-secondary:    #1D6F8A;
  --df-accent:       #F4B400;
  --df-accent-dark:  #c9930a;
  --df-bg:           #F7F9FC;
  --df-card:         #FFFFFF;
  --df-text:         #1A2B3C;
  --df-muted:        #5C7080;
  --df-border:       #E3E9F1;
  --df-success:      #1E8E5A;
  --df-danger:       #C0392B;

  --df-radius-sm: 10px;
  --df-radius-md: 14px;
  --df-radius-lg: 20px;

  --df-shadow-sm: 0 2px 10px rgba(13,59,102,0.06);
  --df-shadow-md: 0 12px 30px rgba(13,59,102,0.10);
  --df-shadow-lg: 0 24px 60px rgba(13,59,102,0.16);

  --df-font-body: 'Vazirmatn', sans-serif;
  --df-font-mono: ui-monospace, 'SFMono-Regular', 'Vazirmatn', Menlo, Consolas, monospace;
}

*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  font-family: var(--df-font-body);
  background: var(--df-bg);
  color: var(--df-text);
  line-height: 1.8;
  overflow-x: hidden;
  direction: rtl;
}
.mono{ font-family: var(--df-font-mono); font-variant-numeric: tabular-nums; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
img{ max-width:100%; display:block; }

.skip-link{
  position:absolute; right:-9999px; top:0; background:var(--df-primary); color:#fff;
  padding:10px 18px; border-radius: 0 0 10px 10px; z-index:2000;
}
.skip-link:focus{ right:20px; }

*:focus-visible{
  outline: 3px solid var(--df-accent);
  outline-offset: 2px;
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn{
  display:inline-flex; align-items:center; gap:10px; justify-content:center;
  font-family: var(--df-font-body); font-weight:700; font-size:0.95rem;
  padding: 0.85rem 1.6rem; border-radius: 999px; border:none; cursor:pointer;
  position:relative; overflow:hidden; transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  white-space:nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-lg{ padding:1rem 2rem; font-size:1.02rem; }
.btn-sm{ padding:0.55rem 1.1rem; font-size:0.85rem; }

.btn-accent{
  background: linear-gradient(135deg, var(--df-accent), var(--df-accent-dark));
  color: var(--df-primary-dark);
  box-shadow: 0 10px 24px rgba(244,180,0,0.35);
}
.btn-accent:hover{ box-shadow: 0 14px 30px rgba(244,180,0,0.45); transform: translateY(-2px); }

.btn-outline-light{
  background: rgba(255,255,255,0.08);
  color:#fff; border: 1.5px solid rgba(255,255,255,0.55);
  backdrop-filter: blur(6px);
}
.btn-outline-light:hover{ background: rgba(255,255,255,0.18); }

.btn-ghost{
  background: transparent; color: var(--df-primary); border: 1.5px solid var(--df-border);
}
.btn-ghost:hover{ background: var(--df-bg); border-color: var(--df-primary); }

.btn-submit{ width:100%; margin-top:1rem; padding:1.05rem; font-size:1.05rem; }

/* ripple */
.btn .ripple{
  position:absolute; border-radius:50%; transform: scale(0);
  background: rgba(255,255,255,0.5); animation: ripple .6s ease-out;
  pointer-events:none;
}
@keyframes ripple{ to{ transform: scale(3); opacity:0; } }

/* =========================================================
   HEADER
   Note: the real site header (.top-bar, header, .header-container,
   .logo, .nav-menu ...) is styled by assets/css/style.css, which is
   loaded on this page alongside this file. Nothing to add here.
   ========================================================= */

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative;
  background: linear-gradient(160deg, var(--df-primary-dark) 0%, var(--df-primary) 55%, var(--df-secondary) 130%);
  color:#fff;
  padding: 5rem 0 7rem;
  overflow:hidden;
}
.hero-strata{
  position:absolute; inset:0; opacity:0.35; pointer-events:none;
}
.hero-strata svg{ width:100%; height:100%; }
.strata-line{ fill:none; stroke-width:2; }
.strata-1{ stroke: rgba(244,180,0,0.55); }
.strata-2{ stroke: rgba(255,255,255,0.25); }
.strata-3{ stroke: rgba(29,111,138,0.55); }

.hero-inner{ position:relative; z-index:2; max-width:760px; }
.eyebrow{
  display:inline-block; font-size:0.85rem; font-weight:700; letter-spacing:0.02em;
  background: rgba(244,180,0,0.16); color: var(--df-accent);
  border: 1px solid rgba(244,180,0,0.4);
  padding: 0.4rem 1rem; border-radius:999px; margin-bottom:1.4rem;
}
.hero h1{
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  font-weight:900; line-height:1.35; margin-bottom:1.2rem;
}
.hero-sub{
  font-size:1.05rem; color: rgba(255,255,255,0.86); max-width:620px; margin-bottom:2.2rem;
}
.hero-actions{ display:flex; flex-wrap:wrap; gap:1rem; margin-bottom:3rem; }

.hero-stats{ display:flex; gap:2.5rem; flex-wrap:wrap; }
.hero-stat{ display:flex; flex-direction:column; gap:0.2rem; }
.hero-stat .mono{ font-size:1.6rem; font-weight:800; color: var(--df-accent); }
.hero-stat small{ color: rgba(255,255,255,0.75); font-size:0.82rem; }

/* drill bit ambient decoration */
.hero-bit{
  position:absolute; left:6%; top:12%; width:10px; height:70%;
  display:flex; flex-direction:column; align-items:center; z-index:1;
  opacity:0.5;
}
.bit-shaft{
  width:4px; flex:1; background: linear-gradient(to bottom, rgba(255,255,255,0.5), rgba(255,255,255,0));
  border-radius: 4px;
  animation: drillDown 6s ease-in-out infinite;
}
.bit-head{
  width:34px; height:34px; border-radius:50%;
  background: var(--df-accent); color: var(--df-primary-dark);
  display:flex; align-items:center; justify-content:center; font-size:0.95rem;
  box-shadow: 0 0 0 6px rgba(244,180,0,0.15);
  animation: drillSpin 6s ease-in-out infinite;
}
@keyframes drillDown{ 0%,100%{ transform: scaleY(1); } 50%{ transform: scaleY(0.7); } }
@keyframes drillSpin{ 0%,100%{ transform: rotate(0deg); } 50%{ transform: rotate(35deg); } }

/* =========================================================
   MAIN GRID
   ========================================================= */
.main-grid{
  display:grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 2rem;
  margin-top: -3.5rem;
  position: relative; z-index: 3;
  padding-bottom: 5rem;
}
.card{
  background: var(--df-card);
  border-radius: var(--df-radius-lg);
  box-shadow: var(--df-shadow-md);
  padding: 2.2rem;
}
.form-card{ padding: 2.4rem; }
.card-head{ margin-bottom: 1.8rem; }
.card-head h2{ font-size:1.5rem; color: var(--df-primary-dark); font-weight:800; margin-bottom:0.4rem; }
.card-head p{ color: var(--df-muted); font-size:0.9rem; }
.req-star{ color: var(--df-danger); }

/* =========================================================
   FORM
   ========================================================= */
.form-section{
  border:none; padding: 1.6rem 0; border-top: 1px dashed var(--df-border);
}
.form-section:first-of-type{ border-top:none; padding-top:0; }
.form-section legend{
  display:flex; align-items:center; gap:10px;
  font-size:1.05rem; font-weight:800; color: var(--df-secondary);
  margin-bottom:1.3rem; padding:0;
}
.section-hint{ color: var(--df-muted); font-size:0.85rem; margin-bottom:1rem; }

.field-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:1.4rem 1.2rem;
}
.field{ position:relative; }
.field-full{ grid-column: 1 / -1; }

.field input,
.field select,
.field textarea{
  width:100%; font-family: var(--df-font-body); font-size:0.95rem; color: var(--df-text);
  background: #FBFCFE;
  border: 1.6px solid var(--df-border);
  border-radius: var(--df-radius-sm);
  padding: 1.05rem 1rem 0.55rem;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.field textarea{ padding-top:1.3rem; resize: vertical; min-height:120px; }
.field select{ appearance:none; cursor:pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%235C7080' stroke-width='2' fill='none' fill-rule='evenodd'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position: left 1rem center; }

.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color: var(--df-secondary); background:#fff;
  box-shadow: 0 0 0 4px rgba(29,111,138,0.12);
}

.field label{
  position:absolute; right:1rem; top:1.05rem;
  color: var(--df-muted); font-size:0.95rem; pointer-events:none;
  transition: all .18s ease; background: transparent; padding: 0 4px;
}
.field label.label-static{ position:static; display:block; margin-bottom:0.4rem; font-size:0.85rem; }

.field input:not([type=date]):focus + label,
.field input:not([type=date]):not(:placeholder-shown) + label,
.field select:focus + label,
.field select:valid + label,
.field textarea:focus + label,
.field textarea:not(:placeholder-shown) + label{
  top:-0.55rem; font-size:0.76rem; background: var(--df-card); color: var(--df-secondary); border-radius:6px;
}
.field select{ color: var(--df-muted); }
.field select:valid{ color: var(--df-text); }

.field.invalid input, .field.invalid select, .field.invalid textarea{
  border-color: var(--df-danger);
  box-shadow: 0 0 0 4px rgba(192,57,43,0.10);
}
.field-error{
  display:none; color: var(--df-danger); font-size:0.78rem; margin-top:0.4rem; align-items:center; gap:6px;
}
.field.invalid .field-error{ display:flex; }
.field-error::before{ content:'\f06a'; font-family:'Font Awesome 6 Free'; font-weight:900; }

/* checkboxes */
.checkbox-grid{
  display:grid; grid-template-columns: repeat(2, 1fr); gap:0.9rem;
}
.checkbox-pill{
  display:flex; align-items:center; gap:10px; cursor:pointer;
  border: 1.6px solid var(--df-border); border-radius: var(--df-radius-sm);
  padding: 0.85rem 1rem; font-size:0.9rem; transition: all .2s ease;
  background:#FBFCFE;
}
.checkbox-pill:hover{ border-color: var(--df-secondary); }
.checkbox-pill input{ accent-color: var(--df-secondary); width:17px; height:17px; }
.checkbox-pill:has(input:checked){
  background: rgba(29,111,138,0.08); border-color: var(--df-secondary); color: var(--df-primary-dark); font-weight:700;
}

.checkbox-line{
  display:flex; align-items:flex-start; gap:12px; cursor:pointer; font-size:0.9rem; color: var(--df-text);
  background:#FBFCFE; border:1.6px solid var(--df-border); border-radius: var(--df-radius-sm); padding:1.1rem;
}
.checkbox-line input{ margin-top:4px; accent-color: var(--df-accent-dark); width:18px; height:18px; flex-shrink:0; }
.checkbox-line:has(input:invalid){ }
#agree.invalid-field ~ .field-error,
[data-error-for="agree"]{ margin-top:0.5rem; }
.form-section:has(#agree.invalid) .checkbox-line{ border-color: var(--df-danger); }
.form-section .field-error[data-error-for="agree"]{ display:none; }
.form-section.show-agree-error .field-error[data-error-for="agree"]{ display:flex; }

/* submit button spinner */
.btn-submit .btn-spinner{
  display:none; width:20px; height:20px; border-radius:50%;
  border: 3px solid rgba(13,39,68,0.25); border-top-color: var(--df-primary-dark);
  animation: spin .7s linear infinite;
}
.btn-submit.loading .btn-label{ opacity:0; position:absolute; }
.btn-submit.loading .btn-spinner{ display:inline-block; }
.btn-submit.loading{ position:relative; }
@keyframes spin{ to{ transform: rotate(360deg); } }

/* =========================================================
   SIDEBAR
   ========================================================= */
.sidebar{ display:flex; flex-direction:column; gap:2rem; }
.process-card h3, .info-card h3{
  display:flex; align-items:center; gap:10px; font-size:1.1rem; color: var(--df-primary-dark);
  font-weight:800; margin-bottom:0.5rem;
}
.process-card i, .info-card h3 i{ color: var(--df-accent-dark); }

/* depth gauge - signature element */
.depth-gauge{
  position:relative; margin-top:1.8rem; padding-right: 2.2rem;
}
.depth-gauge::before{
  content:''; position:absolute; right:11px; top:6px; bottom:6px; width:2px;
  background: repeating-linear-gradient(to bottom, var(--df-border) 0 6px, transparent 6px 11px);
}
.depth-step{
  position:relative; padding-bottom:2.1rem; display:flex; gap:1rem; align-items:flex-start;
}
.depth-step:last-child{ padding-bottom:0; }
.depth-mark{
  position:absolute; right:-2.2rem; top:1px; font-size:0.68rem; color: var(--df-muted); width:2.1rem; text-align:left;
}
.depth-node{
  width:24px; height:24px; border-radius:50%; background:var(--df-card); border:2.5px solid var(--df-secondary);
  color: var(--df-secondary); display:flex; align-items:center; justify-content:center; font-size:0.72rem;
  flex-shrink:0; z-index:1; position:relative;
}
.depth-node-final{ background: var(--df-accent); border-color: var(--df-accent-dark); color: var(--df-primary-dark); }
.depth-text{ display:flex; flex-direction:column; padding-top:1px; }
.depth-text strong{ font-size:0.92rem; color: var(--df-text); }
.depth-text span{ font-size:0.78rem; color: var(--df-muted); }

.dot-list li{ position:relative; padding-right:1.3rem; margin-bottom:0.6rem; font-size:0.9rem; color: var(--df-text); }
.dot-list li::before{ content:''; position:absolute; right:0; top:0.65rem; width:6px; height:6px; border-radius:50%; background: var(--df-accent-dark); }

.divider{ height:1px; background: var(--df-border); margin: 1.4rem 0; }
.response-time{ font-size:1.1rem; }
.response-time .mono{ color: var(--df-secondary); font-weight:800; font-size:1.3rem; }

.contact-line{
  display:flex; align-items:center; gap:10px; margin-top:0.7rem; font-size:0.9rem; font-weight:600;
  color: var(--df-primary-dark); transition: color .2s ease;
}
.contact-line i{ color: var(--df-secondary); }
.contact-line:hover{ color: var(--df-secondary); }

/* =========================================================
   FOOTER
   Note: the real site footer (footer, .footer-grid, .footer-col,
   .footer-end-logo, .footer-bottom-info, .copyright ...) is styled
   by assets/css/style.css, already loaded on this page.
   ========================================================= */

/* =========================================================
   BACK TO TOP
   ========================================================= */
.back-to-top{
  position:fixed; bottom:24px; left:24px; width:48px; height:48px; border-radius:50%;
  background: var(--df-primary); color:#fff; border:none; box-shadow: var(--df-shadow-md);
  display:flex; align-items:center; justify-content:center; font-size:1.1rem; cursor:pointer;
  opacity:0; transform: translateY(20px); pointer-events:none; transition: all .3s ease; z-index:800;
}
.back-to-top.visible{ opacity:1; transform: translateY(0); pointer-events:auto; }
.back-to-top:hover{ background: var(--df-secondary); }

/* =========================================================
   MODAL
   ========================================================= */
.modal-overlay{
  position:fixed; inset:0; background: rgba(8,39,68,0.55); backdrop-filter: blur(4px);
  display:flex; align-items:center; justify-content:center; z-index:1500; padding:1.5rem;
}
.modal-overlay[hidden]{ display:none; }
.modal-box{
  background:#fff; border-radius: var(--df-radius-lg); padding:2.6rem 2rem; max-width:420px; text-align:center;
  box-shadow: var(--df-shadow-lg); animation: modalIn .3s ease;
}
@keyframes modalIn{ from{ opacity:0; transform: translateY(16px) scale(0.97); } to{ opacity:1; transform:none; } }
.modal-icon{ font-size:3rem; color: var(--df-success); margin-bottom:1rem; }
.modal-box h3{ font-size:1.25rem; color: var(--df-primary-dark); margin-bottom:0.7rem; }
.modal-box p{ color: var(--df-muted); font-size:0.9rem; margin-bottom:1.6rem; }

/* =========================================================
   REVEAL ANIMATION
   ========================================================= */
.reveal{ opacity:0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible{ opacity:1; transform:none; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; transition:none; }
  .bit-shaft, .bit-head{ animation:none; }
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1200px){
  .container{ width:94%; }
}

@media (max-width: 992px){
  .main-grid{ grid-template-columns: 1fr; margin-top:-2.5rem; }
  .hero-bit{ display:none; }
}

@media (max-width: 768px){
  .hero{ padding: 3.5rem 0 5.5rem; text-align:center; }
  .hero-inner{ max-width:100%; }
  .hero-actions, .hero-stats{ justify-content:center; }
  .field-grid, .checkbox-grid{ grid-template-columns:1fr; }
  .card{ padding:1.6rem; }
  .footer-row{ flex-direction:column; text-align:center; }
}

@media (max-width: 576px){
  .hero h1{ font-size:1.7rem; }
  .btn-lg{ width:100%; }
  .hero-actions{ flex-direction:column; }
  .depth-mark{ display:none; }
  .depth-gauge{ padding-right:1.2rem; }
}