/* =========================================================================
   Manes Minerals — Premium Mining Landing Page
   Dark-premium design system + section layouts
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
  --bg-base: #0a0a0a;
  --bg-surface: #18181b;
  --bg-card: #1f1f22;
  --accent-copper: #c8842a;
  --accent-gold: #f5c842;
  --text-primary: #f4f4f5;
  --text-muted: #a1a1aa;
  --border: #2e2e32;
  --radius: 8px;
  --transition: 0.3s ease;

  --success: #22c55e;
  --error: #ef4444;
  --nav-height: 4.5rem;
  --maxw: 1200px;
}

/* ---------- Global reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  padding: 0;
}

/* ---------- Typography ---------- */
h1,
h2,
h3 {
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  margin-bottom: 0.75rem;
}

.section-lead {
  color: var(--text-muted);
  max-width: 60ch;
  margin-bottom: 3rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-copper);
  margin-bottom: 1rem;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.section-alt {
  background-color: var(--bg-surface);
}

/* ---------- Button system ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), background-color var(--transition),
    color var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.btn-primary {
  background-color: var(--accent-copper);
  color: #0a0a0a;
}

.btn-primary:hover {
  background-color: var(--accent-gold);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(200, 132, 42, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--accent-copper);
}

.btn-outline:hover {
  background-color: rgba(200, 132, 42, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(200, 132, 42, 0.18);
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 3px;
}

/* ---------- Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 10, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition), border-color var(--transition);
}

.site-header.scrolled {
  background-color: rgba(10, 10, 10, 0.9);
  border-bottom-color: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--accent-copper);
  font-size: 1.1rem;
}

.brand__tagline {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}

.nav__links a:hover {
  color: var(--text-primary);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin-inline: auto;
  background-color: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  background-image: url("https://images.unsplash.com/photo-1578662996442-48f60103fc96?w=1920&h=1080");
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.65),
    rgba(0, 0, 0, 0.3) 55%,
    rgba(10, 10, 10, 0.95)
  );
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-block: clamp(4rem, 10vh, 8rem);
  max-width: 760px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: 1.25rem;
}

.hero__sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--text-muted);
  max-width: 55ch;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__scroll {
  position: absolute;
  bottom: 1.75rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  color: var(--text-muted);
  font-size: 1.4rem;
  animation: bob 2s ease-in-out infinite;
}

@keyframes bob {
  0%,
  100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, 8px);
  }
}

/* ---------- Stats bar ---------- */
.stats {
  background-color: var(--bg-surface);
  border-block: 1px solid var(--border);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 800;
  color: var(--accent-copper);
  line-height: 1;
}

.stat-number .suffix {
  color: var(--accent-gold);
}

.stat__label {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.about__media img {
  width: 100%;
  border-radius: var(--radius);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--border);
}

.about__body p + p {
  margin-top: 1rem;
  color: var(--text-muted);
}

/* ---------- Minerals grid ---------- */
.minerals__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.mineral-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.mineral-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-copper);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.5);
}

.mineral-card__img {
  aspect-ratio: 3 / 2;
  object-fit: cover;
  width: 100%;
}

.mineral-card__body {
  padding: 1.25rem;
}

.mineral-card__body h3 {
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.mineral-card__body p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.mineral-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  text-align: center;
  padding: 1.5rem;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.95),
    rgba(200, 132, 42, 0.35)
  );
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition);
}

.mineral-card:hover .mineral-card__overlay,
.mineral-card:focus-within .mineral-card__overlay {
  opacity: 1;
  transform: translateY(0);
}

.mineral-card__overlay h3 {
  font-size: 1.3rem;
}

.mineral-card__overlay a {
  font-weight: 600;
  color: var(--accent-gold);
  border-bottom: 1px solid var(--accent-gold);
  padding-bottom: 2px;
}

/* ---------- Operations ---------- */
.op-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.op-row + .op-row {
  margin-top: clamp(3rem, 6vw, 5rem);
}

.op-row--reverse .op-row__media {
  order: 2;
}

.op-row__media {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.op-row__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.op-row__body h3 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 1rem;
}

.op-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
}

.op-list li::before {
  content: "\f058"; /* fa-circle-check */
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 0.15rem;
  color: var(--accent-copper);
  font-size: 0.95rem;
}

/* ---------- Certifications ---------- */
.cert__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.cert-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex: 1 1 220px;
  transition: border-color var(--transition), transform var(--transition);
}

.cert-badge:hover {
  border-color: var(--accent-copper);
  transform: translateY(-2px);
}

.cert-badge i {
  color: var(--accent-copper);
  font-size: 1.4rem;
}

.cert-badge span {
  font-weight: 600;
  font-size: 0.95rem;
}

.partner-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.partner-strip__label {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.partner-strip__logos {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
}

.partner-strip__logos span {
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  opacity: 0.75;
  transition: opacity var(--transition), color var(--transition);
}

.partner-strip__logos span:hover {
  opacity: 1;
  color: var(--text-primary);
}

/* ---------- Sustainability ---------- */
.sustain__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.sustain-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform var(--transition), border-color var(--transition);
}

.sustain-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-copper);
}

.sustain-card i {
  font-size: 1.9rem;
  color: var(--accent-copper);
  margin-bottom: 1rem;
}

.sustain-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
}

.sustain-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Testimonials ---------- */
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.25rem 1.75rem 1.75rem;
}

.testimonial__mark {
  font-size: 3rem;
  line-height: 0.6;
  color: var(--accent-copper);
  font-family: Georgia, "Times New Roman", serif;
}

.testimonial__quote {
  margin-block: 1rem;
  color: var(--text-primary);
}

.testimonial__author {
  font-weight: 700;
}

.testimonial__role {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Contact ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.contact-info__item i {
  color: var(--accent-copper);
  font-size: 1.15rem;
  margin-top: 0.25rem;
}

.contact-info__item span {
  color: var(--text-muted);
}

.contact-social {
  display: flex;
  gap: 0.85rem;
  margin-top: 1rem;
}

.contact-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition),
    transform var(--transition);
}

.contact-social a:hover {
  color: var(--accent-gold);
  border-color: var(--accent-copper);
  transform: translateY(-2px);
}

/* form */
.contact-form {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.field {
  margin-bottom: 1.5rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.65rem 0.25rem;
  background-color: transparent;
  color: var(--text-primary);
  border: none;
  border-bottom: 1px solid var(--border);
  font: inherit;
  transition: border-color var(--transition);
}

.field textarea {
  resize: vertical;
  min-height: 120px;
}

.field select option {
  background-color: var(--bg-surface);
  color: var(--text-primary);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--accent-copper);
}

.field.has-error input,
.field.has-error select,
.field.has-error textarea {
  border-bottom-color: var(--error);
}

.field__error {
  display: block;
  min-height: 1rem;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--error);
}

/* morphing submit button states */
#submit-btn {
  width: 100%;
  position: relative;
  transition: transform var(--transition), background-color var(--transition),
    box-shadow var(--transition);
}

#submit-btn.loading {
  background-color: var(--accent-copper);
  opacity: 0.85;
  cursor: progress;
}

#submit-btn.success {
  background-color: var(--success);
  color: #0a0a0a;
}

#submit-btn.error {
  background-color: var(--error);
  color: #fff;
}

@keyframes shake {
  10%,
  90% {
    transform: translateX(-1px);
  }
  20%,
  80% {
    transform: translateX(2px);
  }
  30%,
  50%,
  70% {
    transform: translateX(-4px);
  }
  40%,
  60% {
    transform: translateX(4px);
  }
}

#submit-btn.shake {
  animation: shake 0.5s ease;
}

/* ---------- Footer ---------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  padding-block: clamp(3rem, 6vw, 4.5rem);
}

.footer__brand .brand__name {
  font-size: 1.3rem;
}

.footer__brand p {
  color: var(--text-muted);
  margin-top: 0.75rem;
  max-width: 34ch;
}

.footer__col h4 {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer__col li {
  margin-bottom: 0.6rem;
}

.footer__col a,
.footer__col span {
  color: var(--text-muted);
  font-size: 0.92rem;
  transition: color var(--transition);
}

.footer__col a:hover {
  color: var(--accent-copper);
}

.footer__bottom {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Scroll-reveal base ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    inset: var(--nav-height) 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.25rem 1.25rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }

  .nav.nav-open .nav__links {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__links a {
    width: 100%;
    padding-block: 0.85rem;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }

  /* hamburger -> X */
  .nav.nav-open .nav__toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav.nav-open .nav__toggle span:nth-child(2) {
    opacity: 0;
  }
  .nav.nav-open .nav__toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem 1rem;
  }

  .about__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .op-row {
    grid-template-columns: 1fr;
  }

  .op-row--reverse .op-row__media {
    order: 0;
  }

  .sustain__grid,
  .testimonials__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .stats__grid {
    grid-template-columns: 1fr;
  }

  .partner-strip {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 1280px) {
  .container {
    padding-inline: 2rem;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}