/* ========================================
   TORKE AI - Landing Page Styles
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-black: #0a0a0a;
  --color-dark: #1a1a1a;
  --color-gray-900: #222;
  --color-gray-700: #555;
  --color-gray-500: #888;
  --color-gray-300: #ccc;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f5f5f5;
  --color-white: #ffffff;
  --color-accent: #1a1a2e;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container: 1120px;
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s ease;
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-dark);
  background: var(--color-white);
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.25rem; }

p {
  color: var(--color-gray-700);
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.btn:hover::after {
  transform: translateX(100%);
}

.btn--sm { padding: 8px 20px; font-size: 0.875rem; }
.btn--lg { padding: 16px 32px; font-size: 1rem; }

.btn--primary {
  background: var(--color-black);
  color: var(--color-white);
}

.btn--primary:hover {
  background: #222;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.btn--outline {
  background: transparent;
  color: var(--color-dark);
  border: 1.5px solid var(--color-gray-300);
}

.btn--outline:hover {
  border-color: var(--color-dark);
  background: var(--color-gray-100);
  transform: translateY(-2px);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-black);
}

.btn--white:hover {
  background: var(--color-gray-100);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}

.btn--full { width: 100%; }

/* --- Nav --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

.nav--scrolled {
  border-bottom-color: transparent;
}

.nav::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,0,0,0.08), transparent);
  background-size: 200% 100%;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.nav--scrolled::before {
  opacity: 1;
  animation: navGlow 4s ease-in-out infinite;
}

.nav--scrolled::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 8px;
  background: radial-gradient(ellipse at var(--nav-light-x, 50%) 0%, rgba(0,0,0,0.06) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.nav--scrolled::after {
  opacity: 1;
}

@keyframes navGlow {
  0%, 100% { background-position: 200% 0; }
  50% { background-position: -200% 0; }
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-black);
  letter-spacing: -0.03em;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.nav__logo-ai {
  color: var(--color-gray-500);
  font-weight: 500;
}

.nav__logo-by {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-gray-500);
  margin-left: 6px;
  padding-left: 10px;
  border-left: 1px solid var(--color-gray-300);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__links a:not(.btn)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-black);
  transition: width var(--transition);
}

.nav__links a:not(.btn):hover {
  color: var(--color-black);
}

.nav__links a:not(.btn):hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  padding: 140px 0 60px;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.hero__title {
  margin-bottom: 40px;
  font-size: clamp(2.5rem, 5.5vw, 3.75rem);
}

/* Hero Checklist */
.hero__checklist {
  display: inline-flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
  text-align: left;
}

.hero__check {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 1.05rem;
  color: var(--color-dark);
  font-weight: 500;
  opacity: 0;
  transform: translateX(-16px);
  animation: checkSlideIn 0.5s ease forwards;
  transition: transform 0.2s ease;
}

.hero__check:hover {
  transform: translateX(4px);
}

.hero__check:nth-child(1) { animation-delay: 0.2s; }
.hero__check:nth-child(2) { animation-delay: 0.5s; }
.hero__check:nth-child(3) { animation-delay: 0.8s; }
.hero__check:nth-child(4) { animation-delay: 1.1s; }

@keyframes checkSlideIn {
  to { opacity: 1; transform: translateX(0); }
}

.hero__tick {
  width: 22px;
  height: 22px;
  color: var(--color-black);
  flex-shrink: 0;
}

.hero__tick path {
  stroke-dasharray: 28;
  stroke-dashoffset: 28;
  animation: tickDraw 0.4s ease forwards;
}

.hero__check:nth-child(1) .hero__tick path { animation-delay: 0.4s; }
.hero__check:nth-child(2) .hero__tick path { animation-delay: 0.7s; }
.hero__check:nth-child(3) .hero__tick path { animation-delay: 1.0s; }
.hero__check:nth-child(4) .hero__tick path { animation-delay: 1.3s; }

@keyframes tickDraw {
  to { stroke-dashoffset: 0; }
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

/* --- Torque Graphic --- */
.torque-graphic {
  position: relative;
  width: 340px;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.torque-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid var(--color-gray-200);
}

.torque-ring--outer {
  width: 320px;
  height: 320px;
  animation: torqueSpin 20s linear infinite;
  border-style: dashed;
  border-color: var(--color-gray-300);
}

.torque-ring--mid {
  width: 200px;
  height: 200px;
  animation: torqueSpin 15s linear infinite reverse;
  border-color: var(--color-gray-300);
}

.torque-ring--inner {
  width: 100px;
  height: 100px;
  background: var(--color-gray-100);
  border-color: var(--color-gray-200);
  animation: torquePulse 3s ease-in-out infinite;
}

@keyframes torqueSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes torquePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

/* Particles on outer ring */
.torque-particle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--color-black);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform-origin: 0 0;
  transform: rotate(calc(var(--i) * 45deg)) translateX(160px) translateY(-4px);
  opacity: 0.3;
  animation: particlePulse 2s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.25s);
}

@keyframes particlePulse {
  0%, 100% { opacity: 0.2; transform: rotate(calc(var(--i) * 45deg)) translateX(160px) translateY(-4px) scale(1); }
  50% { opacity: 0.7; transform: rotate(calc(var(--i) * 45deg)) translateX(160px) translateY(-4px) scale(1.5); }
}

.torque-core {
  position: relative;
  z-index: 2;
  width: 48px;
  height: 48px;
  color: var(--color-black);
  animation: coreFloat 4s ease-in-out infinite;
}

@keyframes coreFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.torque-bolt {
  position: absolute;
  width: 28px;
  height: 28px;
  color: var(--color-dark);
  opacity: 0.4;
  animation: boltFloat 3s ease-in-out infinite;
}

.torque-bolt--1 { top: 15%; right: 18%; animation-delay: 0s; }
.torque-bolt--2 { bottom: 20%; left: 12%; animation-delay: 1s; }
.torque-bolt--3 { bottom: 15%; right: 15%; animation-delay: 2s; }

@keyframes boltFloat {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
  50% { transform: translateY(-8px) scale(1.1); opacity: 0.6; }
}

/* Hover liveness on graphic */
.torque-graphic:hover .torque-ring--outer { animation-duration: 8s; border-color: var(--color-dark); }
.torque-graphic:hover .torque-ring--mid { animation-duration: 6s; border-color: var(--color-dark); }
.torque-graphic:hover .torque-ring--inner { background: var(--color-gray-200); }
.torque-graphic:hover .torque-bolt { opacity: 0.7; }
.torque-graphic:hover .torque-particle { opacity: 0.7; }

/* --- Clients Section --- */
.clients-section {
  padding: 40px 0 48px;
  border-bottom: 1px solid var(--color-gray-100);
}

.clients__label {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-500);
  margin-bottom: 24px;
}

.clients {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.clients__track {
  display: flex;
  gap: 48px;
  animation: scroll 25s linear infinite;
  width: max-content;
}

.clients__logo {
  flex-shrink: 0;
  width: 140px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.4;
  filter: grayscale(100%);
  transition: all var(--transition);
}

.clients__logo:hover {
  opacity: 0.8;
  filter: grayscale(0%);
  transform: scale(1.05);
}

.clients__logo svg {
  width: 120px;
  height: 40px;
}

@keyframes scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(-140px * 6 - 48px * 6)); }
}

/* --- Sections --- */
.section {
  padding: 100px 0;
}

.section--dark {
  background: var(--color-accent);
  color: var(--color-white);
}

.section--dark .section__title { color: var(--color-white); }
.section--dark .section__desc { color: rgba(255,255,255,0.7); }

.section--light {
  background: var(--color-gray-100);
}

.section__header {
  margin-bottom: 64px;
}

.section__header--center {
  text-align: center;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section__header--left {
  max-width: 600px;
}

.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-500);
  margin-bottom: 12px;
}

.section__label--light { color: rgba(255,255,255,0.5); }

.section__title { margin-bottom: 16px; }

.section__title--sm {
  font-size: clamp(1.5rem, 2.5vw, 1.75rem);
}

.section__desc {
  font-size: 1.125rem;
  color: var(--color-gray-700);
}

/* --- About --- */
.about__inner {
  max-width: 640px;
}

.about__placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gray-100), var(--color-white));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--transition);
}

.about__placeholder:hover {
  transform: scale(1.05);
}

.about__placeholder:hover .about__icon-ring {
  transform: scale(1.1);
  opacity: 0.6;
}

.about__icon-wrapper {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about__icon-wrapper svg {
  width: 48px;
  height: 48px;
  color: var(--color-dark);
  transition: all var(--transition);
}

.about__placeholder:hover .about__icon-wrapper svg {
  color: var(--color-black);
  transform: scale(1.1);
}

.about__icon-ring {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  border: 1.5px dashed var(--color-gray-300);
  animation: torqueSpin 12s linear infinite;
  transition: all var(--transition);
}

.about__content p {
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.about__highlight {
  font-weight: 600;
  color: var(--color-black) !important;
  margin-top: 8px;
}

.about__credentials {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.credential {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-dark);
  transition: all var(--transition-fast);
}

.credential:hover {
  transform: translateX(4px);
}

.credential__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-black);
  flex-shrink: 0;
  transition: all var(--transition);
}

.credential:hover .credential__dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.1);
}

/* --- Problem --- */
.problem__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.problem__text p {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.problem__text p:last-child {
  color: var(--color-black);
  font-weight: 500;
}

.problem__bar { margin-bottom: 32px; }

.problem__bar-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: 8px;
}

.problem__bar-fill {
  height: 8px;
  border-radius: 4px;
  background: var(--color-gray-300);
  position: relative;
  overflow: hidden;
}

.problem__bar-fill::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-radius: 4px;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0;
}

.problem__bar-fill--low::after { background: var(--color-gray-500); }
.problem__bar-fill--high::after { background: var(--color-black); }

.problem__bar-fill.animate.problem__bar-fill--low::after { width: 20%; }
.problem__bar-fill.animate.problem__bar-fill--high::after { width: 85%; }

/* --- Steps --- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.step {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  border: 1px solid transparent;
}

.step:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-200);
  transform: translateY(-4px);
}

.step__number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-gray-200);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
  transition: color var(--transition);
}

.step:hover .step__number {
  color: var(--color-gray-300);
}

.step__title { margin-bottom: 12px; }

.step__text {
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.step__list li {
  font-size: 0.95rem;
  color: var(--color-gray-700);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.step__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gray-500);
}

/* --- Includes --- */
.includes__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.includes__item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid rgba(0,0,0,0.05);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition);
  cursor: default;
}

.includes__item:hover {
  border-color: var(--color-dark);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-3px);
}

.includes__item:hover .includes__icon {
  transform: scale(1.15);
}

.includes__icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-black);
  transition: transform var(--transition-bounce);
}

/* --- Cases --- */
.cases__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.case {
  padding: 32px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.case::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.case:hover::before {
  transform: scaleX(1);
}

.case:hover {
  border-color: var(--color-gray-300);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}

.case__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  background: var(--color-gray-100);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
  transition: all var(--transition);
}

.case:hover .case__tag {
  background: var(--color-black);
  color: var(--color-white);
}

.case__title {
  margin-bottom: 12px;
  font-size: 1.15rem;
}

.case__text {
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.case__result {
  padding-top: 20px;
  border-top: 1px solid var(--color-gray-100);
}

.case__metric {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 4px;
  transition: all var(--transition);
}

.case:hover .case__metric {
  transform: scale(1.05);
  transform-origin: left;
}

.case__label {
  font-size: 0.8rem;
  color: var(--color-gray-500);
}

/* --- CTA --- */
.cta {
  background: var(--color-accent);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.05);
  top: -200px;
  right: -100px;
  animation: torqueSpin 30s linear infinite;
}

.cta::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.05);
  bottom: -150px;
  left: -50px;
  animation: torqueSpin 25s linear infinite reverse;
}

.cta__inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta__title {
  color: var(--color-white);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Contact --- */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact__info p {
  font-size: 1.05rem;
  max-width: 360px;
}

.contact__signature {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-gray-300);
}

.contact__sig-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 2px;
}

.contact__sig-detail {
  font-size: 0.85rem;
  color: var(--color-gray-500);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form__group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-dark);
}

.form__group input,
.form__group textarea {
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 14px 16px;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-dark);
  transition: all var(--transition);
  outline: none;
}

.form__group input:focus,
.form__group textarea:focus {
  border-color: var(--color-black);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
  transform: translateY(-1px);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
  color: var(--color-gray-500);
}

.form__group textarea {
  resize: vertical;
  min-height: 100px;
}

.form__header {
  font-family: 'Caveat', cursive;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-black);
  text-align: center;
  padding-bottom: 12px;
  transform: rotate(-1deg);
}

.form__header-highlight {
  position: relative;
  display: inline-block;
}

.form__header-highlight::after {
  content: '';
  position: absolute;
  left: -4px;
  right: -4px;
  bottom: 2px;
  height: 8px;
  background: rgba(0,0,0,0.08);
  border-radius: 4px;
  z-index: -1;
}

/* --- Footer --- */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-gray-100);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--color-gray-500);
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 968px) {
  .hero {
    min-height: auto;
    padding: 140px 0 60px;
  }

  .problem__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .steps { grid-template-columns: 1fr; gap: 24px; }
  .step { padding: 24px; }

  .cases__grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }


  .contact__inner { grid-template-columns: 1fr; gap: 40px; }

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

  .section { padding: 72px 0; }
  .cta { padding: 72px 0; }
}

@media (max-width: 640px) {
  .nav__links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 99;
  }

  .nav__links.open { display: flex; }

  .nav__links a { font-size: 1.25rem; }
  .nav__links a:not(.btn)::after { display: none; }

  .nav__toggle { display: flex; z-index: 101; }

  .nav__toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav__toggle.open span:nth-child(2) { opacity: 0; }
  .nav__toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .nav__logo-by { display: none; }

  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }

  .includes__grid { grid-template-columns: 1fr; }
  .cases__grid { grid-template-columns: 1fr; }

  .footer__inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}