/* ==========================================================================
   RISHI OIL — COMPONENTS
   Every reusable UI block used across pages. Keep page CSS out of here;
   page-specific rules belong in css/pages/*.css
   ========================================================================== */

/* ---------------------------------------------------------------------- */
/* Buttons                                                                 */
/* ---------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.75rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-flame);
  color: var(--color-navy-900);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.35);
}
.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--outline-navy {
  background: transparent;
  color: var(--color-navy-900);
  border: 1.5px solid var(--color-navy-700);
}
.btn--outline-navy:hover {
  background: var(--color-navy-900);
  color: var(--color-white);
}

.btn--sm { padding: 0.6rem 1.25rem; font-size: 0.8125rem; }

/* ---------------------------------------------------------------------- */
/* Site Header                                                             */
/* ---------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(13, 30, 51, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-white);
}

.brand img {
  height: 42px;
  width: auto;
}

.brand-word {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}
.brand-word span { color: var(--color-accent); }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
}

.nav-links a {
  position: relative;
  color: rgba(255,255,255,0.82);
  font-size: 0.9375rem;
  font-weight: 500;
  padding-block: var(--space-2);
  transition: color var(--dur-fast) var(--ease-out);
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  transition: right var(--dur-med) var(--ease-out);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-white);
}
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  right: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  color: var(--color-white);
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur-med) var(--ease-out), opacity var(--dur-fast);
}

/* ---------------------------------------------------------------------- */
/* Hero                                                                    */
/* ---------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--gradient-navy);
  color: var(--color-white);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-7);
  align-items: center;
  padding-block: var(--space-9) var(--space-8);
}

.hero-copy h1 { 
  margin-top: var(--space-4);
  color: var(--color-white);
 }

.hero-copy p {
  max-width: 46ch;
  margin-top: var(--space-5);
  color: rgba(255,255,255,0.78);
  font-size: 1.0625rem;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-7);
  flex-wrap: wrap;
}

.hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
}
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.hero-blob {
  position: absolute;
  z-index: 1;
  inset: auto -20% -60% auto;
  width: 60vw;
  aspect-ratio: 1;
  background: var(--gradient-flame);
  opacity: 0.16;
  filter: blur(60px);
  border-radius: 50%;
  pointer-events: none;
}

/* Signature flame-drop divider — echoes the amber/navy curve on the card */
.flame-divider {
  display: block;
  width: 100%;
  height: 64px;
  margin-top: -1px;
}

/* ---------------------------------------------------------------------- */
/* Stats strip                                                             */
/* ---------------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  padding-block: var(--space-7);
}

.stat {
  text-align: left;
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-4);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
  font-weight: 600;
  color: var(--color-navy-900);
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.stat-label {
  margin-top: var(--space-2);
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------- */
/* Section headings                                                        */
/* ---------------------------------------------------------------------- */
.section-head {
  max-width: 60ch;
  margin-bottom: var(--space-7);
}
.section-head h2 { margin-top: var(--space-3); }
.section-head p {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
}
.section-head--center { margin-inline: auto; text-align: center; }

/* ---------------------------------------------------------------------- */
/* Cards                                                                   */
/* ---------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-media { aspect-ratio: 16/10; overflow: hidden; }
.card-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.card:hover .card-media img { transform: scale(1.06); }

.card-body { padding: var(--space-5); }
.card-body h3 { font-size: 1.15rem;}
.card-body p { margin-top: var(--space-2); color: var(--color-text-muted); font-size: var(--fs-small); }

.card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-strong);
  background: var(--color-amber-100);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: var(--space-3);
}

/* Application icon-cards (no photo, mono-style tile) */
.tile {
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-fast), transform var(--dur-fast) var(--ease-out);
}
.tile:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
}
.tile-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-navy-900);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.tile h3 { font-size: 1rem; }
.tile p { margin-top: var(--space-2); font-size: 0.875rem; color: var(--color-text-muted); }

/* ---------------------------------------------------------------------- */
/* Product detail — datasheet styling (mono face signals real spec data)  */
/* ---------------------------------------------------------------------- */
.product-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-8);
  align-items: start;
  padding-block: var(--space-8);
}
.product-block:not(:last-child) {
  border-bottom: 1px solid var(--color-line);
}

.product-media {
  position: sticky;
  top: calc(var(--space-8));
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 4/5;
}
.product-media img { width: 100%; height: 100%; object-fit: cover; }

.product-id {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-accent-strong);
  letter-spacing: 0.06em;
}

.product-body h3 {
  font-size: var(--fs-h2);
  margin-top: var(--space-2);
}

.product-lede {
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  max-width: 62ch;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}
.spec-table caption {
  text-align: left;
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--color-navy-900);
  margin-bottom: var(--space-3);
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 0.65rem var(--space-3);
  border-bottom: 1px solid var(--color-line);
}
.spec-table thead th {
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--color-navy-900);
}
.spec-table tbody tr:hover { background: var(--color-amber-100); }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}
.tag-list li {
  font-size: 0.8125rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--color-navy-900);
  color: var(--color-white);
}

.product-cta {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-6);
  flex-wrap: wrap;
}

/* ---------------------------------------------------------------------- */
/* Quote / CTA band                                                        */
/* ---------------------------------------------------------------------- */
.cta-band {
  background: var(--gradient-navy);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-band::after {
  content: '';
  position: absolute;
  inset: -40% -10% auto auto;
  width: 40%;
  aspect-ratio: 1;
  background: var(--gradient-flame);
  opacity: 0.18;
  filter: blur(50px);
  border-radius: 50%;
}
.cta-band h2 { max-width: 34ch; position: relative; z-index: 1; color: var(--color-white);}
.cta-band .btn { position: relative; z-index: 1; }

/* ---------------------------------------------------------------------- */
/* Forms                                                                   */
/* ---------------------------------------------------------------------- */
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.form-field label {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-navy-900);
}
.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.8rem var(--space-4);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--dur-fast) var(--ease-out);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-accent);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }

.form-note {
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.form-success {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-sm);
  background: var(--color-amber-100);
  color: var(--color-navy-900);
  font-weight: 600;
  margin-bottom: var(--space-5);
}
.form-success.is-visible { display: flex; }

/* ---------------------------------------------------------------------- */
/* Contact info list                                                       */
/* ---------------------------------------------------------------------- */
.info-list { display: flex; flex-direction: column; gap: var(--space-5); }
.info-item { display: flex; gap: var(--space-4); align-items: flex-start; }
.info-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-navy-900);
  color: var(--color-accent);
  display: grid; place-items: center;
  flex-shrink: 0;
}
.info-item h4 { font-size: 0.95rem; }
.info-item p { color: var(--color-text-muted); font-size: 0.9rem; margin-top: 2px; }

/* ---------------------------------------------------------------------- */
/* Timeline (About page)                                                   */
/* ---------------------------------------------------------------------- */
.timeline { position: relative; padding-left: var(--space-6); border-left: 2px solid var(--color-line); }
.timeline-item { position: relative; padding-bottom: var(--space-7); }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-6) - 5px);
  top: 4px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-amber-100);
}
.timeline-year {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--color-accent-strong);
}
.timeline-item h3 { margin-top: var(--space-2); font-size: 1.1rem; }
.timeline-item p { margin-top: var(--space-2); color: var(--color-text-muted); }

/* ---------------------------------------------------------------------- */
/* Footer                                                                  */
/* ---------------------------------------------------------------------- */
.site-footer {
  background: var(--color-navy-900);
  color: rgba(255,255,255,0.72);
  padding-block: var(--space-8) var(--space-6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-7);
}
.footer-brand .brand-word { color: var(--color-white); }
.footer-brand p { margin-top: var(--space-4); max-width: 32ch; font-size: 0.9rem; }
.footer-col h4 {
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { font-size: 0.9rem; transition: color var(--dur-fast); }
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.8125rem;
}

/* ---------------------------------------------------------------------- */
/* Reveal-on-scroll utility (progressive enhancement, JS toggles class)    */
/* ---------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------------------------------------------------------------------- */
/* Back-to-top                                                             */
/* ---------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  left: var(--space-5);
  bottom: var(--space-5);
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--gradient-flame);
  color: var(--color-navy-900);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--dur-med) var(--ease-out), transform var(--dur-med) var(--ease-out);
  z-index: var(--z-header);
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }

/* ---------------------------------------------------------------------- */
/* WhatsApp floating action button                                        */
/* ---------------------------------------------------------------------- */
.whatsapp-fab {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  width: 54px; height: 54px;
  border-radius: 50%;
  background: #25d366;
  color: var(--color-white);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  z-index: var(--z-header);
  transition: transform var(--dur-fast) var(--ease-out);
}
.whatsapp-fab:hover { transform: scale(1.08); }