/* ==============================================
   NHẬT NAM DECOR - MAIN STYLESHEET
   Design System: Material-first, Minimal, Premium
   ============================================== */

/* RESET & BASE */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0e0e0e;
  color: #ffffff;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', 'Playfair Display', serif;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

h1 { font-size: clamp(42px, 6vw, 72px); }
h2 { font-size: clamp(32px, 4vw, 48px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }

p {
  color: #b5b5b5;
  line-height: 1.8;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

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

/* CONTAINERS */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #c9ab7a, #b9965a);
  color: #111;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #d9bc8c, #c9ab7a);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(201, 171, 122, 0.3);
}

.btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  background: transparent;
}

.btn-outline:hover {
  border-color: #c9ab7a;
  color: #c9ab7a;
}

.btn-large {
  padding: 18px 48px;
  font-size: 16px;
}

/* NAVIGATION */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(14, 14, 14, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo a {
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 40px;
  width: auto;
  transition: opacity 0.3s ease;
}

.nav-logo a:hover img {
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 40px;
  align-items: center;
}

.nav-menu a {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.8);
}

.nav-menu a:hover {
  color: #c9ab7a;
}

.nav-cta {
  padding: 8px 20px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 2px;
}

.nav-cta:hover {
  border-color: #c9ab7a;
  color: #c9ab7a;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 25px;
  height: 2px;
  background: #fff;
  transition: all 0.3s;
}

/* HERO SECTION */
.hero {
  position: relative;
  height: 100vh;
  background-image: url('images/hero-aluminum.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.65) 0%,
    rgba(0, 0, 0, 0.55) 50%,
    rgba(0, 0, 0, 0.75) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  text-align: center;
}

.hero-content h1 {
  margin-bottom: 24px;
}

.hero-content h1 span {
  font-weight: 600;
  color: #c9ab7a;
}

.hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: #d1d1d1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 48px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.hero-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.06em;
}

.scroll-indicator {
  position: absolute;
  bottom: 24px;
  z-index: 2;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.6);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(8px);
  }
  60% {
    transform: translateY(4px);
  }
}

/* SECTION INTRO */
.section-intro {
  text-align: center;
  padding: 120px 24px 80px;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #c9ab7a;
  margin-bottom: 16px;
  font-weight: 600;
}

.section-title {
  margin-bottom: 24px;
  color: #ffffff;
}

.section-desc {
  max-width: 700px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: #b5b5b5;
}

/* FEATURE GRID */
.feature-grid {
  padding: 80px 24px;
  background: #0e0e0e;
  position: relative;
}

.feature-grid::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(201, 171, 122, 0.2) 50%,
    transparent 100%
  );
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-item {
  position: relative;
  padding: 40px 32px;
  background: rgba(26, 26, 26, 0.3);
  border: 1px solid rgba(201, 171, 122, 0.1);
  border-radius: 2px;
  text-align: center;
  transition: all 0.4s ease;
}

.feature-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(to right, transparent, #c9ab7a, transparent);
  transition: width 0.4s ease;
}

.feature-item:hover {
  background: rgba(26, 26, 26, 0.6);
  border-color: rgba(201, 171, 122, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.feature-item:hover::before {
  width: 80%;
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  color: #c9ab7a;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform 0.4s ease;
}

.feature-icon::after {
  content: '';
  position: absolute;
  inset: -8px;
  border: 1px solid rgba(201, 171, 122, 0.2);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.feature-item:hover .feature-icon {
  transform: scale(1.1);
}

.feature-item:hover .feature-icon::after {
  opacity: 1;
  transform: scale(1.1);
}

.feature-item h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #ffffff;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.4s ease;
}

.feature-item:hover h3 {
  color: #c9ab7a;
}

.feature-item p {
  font-size: 15px;
  color: #b5b5b5;
  line-height: 1.8;
  transition: color 0.4s ease;
}

.feature-item:hover p {
  color: #d1d1d1;
}

/* SOLUTION SECTION */
.solution-section {
  padding: 120px 24px;
  background: #0e0e0e;
  position: relative;
}

.solution-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 120px;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.solution-item:last-child {
  margin-bottom: 0;
}

.solution-item::before {
  content: '';
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(201, 171, 122, 0.2) 50%,
    transparent 100%
  );
}

.solution-item:last-child::before {
  display: none;
}

.solution-item.reverse {
  direction: rtl;
}

.solution-item.reverse > * {
  direction: ltr;
}

.solution-image {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  aspect-ratio: 4/3;
  background: #1a1a1a;
}

.solution-image::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(201, 171, 122, 0.15);
  z-index: 2;
  pointer-events: none;
  transition: border-color 0.4s ease;
}

.solution-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(201, 171, 122, 0.1) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 1;
}

.solution-item:hover .solution-image::before {
  border-color: rgba(201, 171, 122, 0.4);
}

.solution-item:hover .solution-image::after {
  opacity: 1;
}

.solution-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  filter: brightness(0.9) contrast(1.05);
}

.solution-item:hover .solution-image img {
  transform: scale(1.05);
  filter: brightness(1) contrast(1.1);
}

.solution-text {
  padding: 20px;
}

.solution-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.15em;
  color: #c9ab7a;
  margin-bottom: 16px;
  font-weight: 600;
  text-transform: uppercase;
  position: relative;
  padding-left: 32px;
}

.solution-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 2px;
  background: linear-gradient(to right, #c9ab7a, transparent);
  transition: width 0.4s ease;
}

.solution-item:hover .solution-label::before {
  width: 24px;
}

.solution-text h3 {
  font-size: 32px;
  margin-bottom: 20px;
  color: #ffffff;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.4s ease;
}

.solution-item:hover .solution-text h3 {
  color: #c9ab7a;
}

.solution-text p {
  font-size: 16px;
  line-height: 1.8;
  color: #b5b5b5;
  margin-bottom: 24px;
  transition: color 0.4s ease;
}

.solution-item:hover .solution-text p {
  color: #d1d1d1;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #c9ab7a;
  transition: gap 0.3s ease, color 0.3s ease;
  position: relative;
}

.link-arrow::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #c9ab7a;
  transition: width 0.3s ease;
}

.link-arrow:hover {
  gap: 12px;
  color: #d9bc8c;
}

.link-arrow:hover::after {
  width: 100%;
}

/* GALLERY */
.gallery {
  padding: 120px 0;
  background: #0e0e0e;
  position: relative;
}

.gallery::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(201, 171, 122, 0.3) 50%,
    transparent 100%
  );
}

.gallery .container {
  margin-bottom: 60px;
}

.gallery .section-intro {
  padding: 0 24px 60px;
  margin: 0;
  position: relative;
}

.gallery .section-label {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #c9ab7a;
  margin-bottom: 16px;
  font-weight: 600;
  position: relative;
  padding-left: 40px;
}

.gallery .section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 2px;
  background: linear-gradient(to right, #c9ab7a, transparent);
}

.gallery .section-title {
  font-size: clamp(32px, 4vw, 48px);
  margin-bottom: 0;
  color: #ffffff;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
  border-radius: 2px;
  background: #1a1a1a;
}

.gallery-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(201, 171, 122, 0.1);
  transition: border-color 0.4s ease;
  z-index: 2;
  pointer-events: none;
}

.gallery-item:hover::before {
  border-color: rgba(201, 171, 122, 0.4);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.4s ease;
  filter: brightness(0.9) contrast(1.05);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(0, 0, 0, 0.4) 60%,
    rgba(0, 0, 0, 0.85) 100%
  );
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 32px;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 1;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-item:hover img {
  transform: scale(1.08);
  filter: brightness(1) contrast(1.1);
}

.gallery-overlay span {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffffff;
  position: relative;
  padding-left: 24px;
  transition: padding-left 0.3s ease;
}

.gallery-overlay span::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 2px;
  background: #c9ab7a;
  transition: width 0.3s ease;
}

.gallery-item:hover .gallery-overlay span::before {
  width: 16px;
}

.gallery-item:hover .gallery-overlay span {
  padding-left: 28px;
}

.gallery-zoom-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 171, 122, 0.2);
  border: 1px solid rgba(201, 171, 122, 0.4);
  border-radius: 50%;
  color: #c9ab7a;
  font-size: 20px;
  transition: all 0.3s ease;
}

.gallery-item:hover .gallery-zoom-icon {
  background: rgba(201, 171, 122, 0.3);
  transform: scale(1.1);
}

/* LIGHTBOX */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
  animation: fadeIn 0.3s ease;
}

.lightbox.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.lightbox-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border: 2px solid rgba(201, 171, 122, 0.3);
  border-radius: 2px;
}

.lightbox-close {
  position: absolute;
  top: -50px;
  right: 0;
  width: 40px;
  height: 40px;
  background: rgba(201, 171, 122, 0.2);
  border: 1px solid rgba(201, 171, 122, 0.4);
  border-radius: 50%;
  color: #c9ab7a;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lightbox-close:hover {
  background: rgba(201, 171, 122, 0.3);
  transform: rotate(90deg);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(201, 171, 122, 0.2);
  border: 1px solid rgba(201, 171, 122, 0.4);
  border-radius: 50%;
  color: #c9ab7a;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lightbox-nav:hover {
  background: rgba(201, 171, 122, 0.3);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
  left: -70px;
}

.lightbox-next {
  right: -70px;
}

.lightbox-caption {
  position: absolute;
  bottom: -50px;
  left: 0;
  right: 0;
  text-align: center;
  color: #c9ab7a;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* PROCESS SECTION */
.process-section {
  padding: 120px 24px;
  background: #0e0e0e;
  position: relative;
}

.process-section .section-intro {
  padding-bottom: 80px;
  margin-bottom: 0;
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.process-step {
  position: relative;
  padding: 40px 32px;
  background: rgba(26, 26, 26, 0.5);
  border: 1px solid rgba(201, 171, 122, 0.15);
  border-radius: 2px;
  transition: all 0.4s ease;
}

.process-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: linear-gradient(180deg, #c9ab7a, #b9965a);
  transition: height 0.4s ease;
}

.process-step:hover {
  background: rgba(26, 26, 26, 0.8);
  border-color: rgba(201, 171, 122, 0.3);
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

.process-step:hover::before {
  height: 100%;
}

.process-number {
  font-size: 72px;
  font-weight: 600;
  color: rgba(201, 171, 122, 0.15);
  margin-bottom: 20px;
  font-family: 'Montserrat', sans-serif;
  line-height: 1;
  transition: color 0.4s ease;
}

.process-step:hover .process-number {
  color: rgba(201, 171, 122, 0.3);
}

.process-step h3 {
  font-size: 22px;
  margin-bottom: 16px;
  color: #ffffff;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.4s ease;
}

.process-step:hover h3 {
  color: #c9ab7a;
}

.process-step p {
  font-size: 15px;
  color: #b5b5b5;
  line-height: 1.8;
  transition: color 0.4s ease;
}

.process-step:hover p {
  color: #d1d1d1;
}

/* ABOUT SECTION */
.about-section {
  padding: 120px 24px;
  text-align: center;
}

.about-section h2 {
  margin-bottom: 32px;
  color: #ffffff;
}

.about-text {
  font-size: 18px;
  line-height: 1.9;
  color: #b5b5b5;
  margin-bottom: 32px;
}

.about-info {
  font-size: 14px;
  color: #c9ab7a;
  letter-spacing: 0.08em;
}

.about-info span {
  display: inline-block;
  margin: 0 8px;
}

/* CTA FINAL */
.cta-final {
  padding: 120px 24px;
  background: linear-gradient(135deg, #1a1a1a 0%, #0e0e0e 100%);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.cta-final h2 {
  font-size: 36px;
  margin-bottom: 20px;
  color: #ffffff;
}

.cta-final p {
  font-size: 18px;
  color: #b5b5b5;
  margin-bottom: 40px;
}

/* FOOTER */
.footer {
  padding: 80px 24px 40px;
  background: #0e0e0e;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto 60px;
}

.footer-col h4 {
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
  color: #c9ab7a;
  font-weight: 600;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.8;
  color: #b5b5b5;
}

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .solution-item {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .solution-item.reverse {
    direction: ltr;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-sub {
    font-size: 14px;
  }

  .section-intro {
    padding: 80px 24px 60px;
  }

  .feature-grid {
    padding: 60px 24px;
  }

  .grid-3 {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .solution-section {
    padding: 80px 24px;
  }

  .solution-item {
    margin-bottom: 80px;
  }

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

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .gallery-overlay {
    padding: 20px;
  }
  
  .gallery-overlay span {
    font-size: 14px;
  }
  
  .lightbox {
    padding: 20px;
  }
  
  .lightbox-close {
    top: 10px;
    right: 10px;
  }
  
  .lightbox-nav {
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  
  .lightbox-prev {
    left: 10px;
  }
  
  .lightbox-next {
    right: 10px;
  }
  
  .lightbox-caption {
    bottom: 10px;
    font-size: 12px;
  }

  .cta-final h2 {
    font-size: 28px;
  }

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

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}