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

:root {
  --bg: #0a0a0f;
  --bg-card: #141419;
  --bg-card-hover: #1c1c24;
  --text: #f5f5f7;
  --text-secondary: #a1a1a6;
  --accent: #2997ff;
  --accent-hover: #0077ed;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --success: #30d158;
  --warning: #ffd60a;
  --error: #ff453a;
  --info: #64d2ff;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.site-header {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-header__nav a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition);
}

.site-header__nav a:hover {
  color: var(--text);
}

@media (max-width: 600px) {
  .site-header__nav {
    gap: 16px;
  }
  .site-header__nav a {
    font-size: 0.8rem;
  }
}

/* ===== Hero ===== */
.hero {
  padding: 48px 0 32px;
  text-align: center;
}

.hero__title {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero__image {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius);
  overflow: hidden;
}

.hero__image img {
  width: 100%;
  border-radius: var(--radius);
}

/* ===== Product Grid ===== */
.catalog {
  padding: 48px 0;
}

.catalog__title {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

@media (max-width: 400px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Product Card (catalog) ===== */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.14);
}

.product-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #111;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.product-card:hover .product-card__image img {
  transform: scale(1.03);
}

.product-card__body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card__nominal {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.product-card__price {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.product-card__price span {
  color: var(--accent);
  font-weight: 600;
}

.product-card__btn {
  margin-top: auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: 980px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: scale(1.03);
}

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

.btn--outline:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.03);
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  color: var(--text);
  transform: scale(1.03);
}

.btn--large {
  padding: 16px 40px;
  font-size: 1.05rem;
}

.btn--block {
  display: flex;
  width: 100%;
}

.btn--small {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ===== Features ===== */
.features {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  text-align: center;
}

.feature {
  padding: 32px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.feature__icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== How-To ===== */
.howto {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.howto__title {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: -0.02em;
}

.howto__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.howto__step {
  position: relative;
  padding: 28px 24px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  counter-increment: step;
}

.howto__step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 14px;
}

.howto__step-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.howto__step-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== Footer ===== */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--accent);
}

.site-footer__links {
  margin-top: 12px;
}

/* ===== Product Page ===== */
.product {
  padding: 48px 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 28px;
  transition: gap var(--transition);
}

.back-link:hover {
  gap: 10px;
}

.back-link::before {
  content: "\2190";
}

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

@media (min-width: 768px) {
  .product__layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.product__image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.product__image img {
  width: 100%;
  border-radius: var(--radius);
}

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

.product__badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(41, 151, 255, 0.12);
  color: var(--accent);
  border-radius: 980px;
  width: fit-content;
}

.product__nominal {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.product__price {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

.product__price strong {
  color: var(--text);
  font-size: 1.5rem;
}

.product__description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.product__cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 8px;
}

/* ===== Services List ===== */
.services {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.services__title {
  font-size: 1.35rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.service {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: border-color var(--transition), background var(--transition);
}

.service:hover {
  border-color: rgba(255, 255, 255, 0.14);
  background: var(--bg-card-hover);
}

.service__icon {
  font-size: 2rem;
}

.service__name {
  font-size: 0.88rem;
  font-weight: 500;
}

/* ===== Activation Steps (product page) ===== */
.activation {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.activation__title {
  font-size: 1.35rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.activation__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  counter-reset: activation-step;
}

.activation__step {
  position: relative;
  padding: 24px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  counter-increment: activation-step;
}

.activation__step::before {
  content: counter(activation-step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 12px;
}

.activation__step-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.activation__step-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== Custom Nominal Section ===== */
.custom-nominal {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.custom-nominal__inner {
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
}

.custom-nominal__title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.custom-nominal__subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.custom-nominal__input-group {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.custom-nominal__input-group input {
  flex: 1;
  min-width: 0;
}

.custom-nominal__result {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 1.6em;
}

.custom-nominal__result span {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.3rem;
}

/* ===== Form Elements ===== */
.form-input {
  width: 100%;
  padding: 14px 20px;
  font-size: 1rem;
  font-family: inherit;
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}

.form-input:focus {
  border-color: var(--accent);
  background: rgba(41, 151, 255, 0.06);
}

.form-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.form-input--error {
  border-color: var(--error);
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-align: left;
}

.form-group {
  margin-bottom: 24px;
}

.form-error {
  font-size: 0.82rem;
  color: var(--error);
  margin-top: 6px;
  text-align: left;
}

/* ===== Order Page ===== */
.order-page {
  padding: 48px 0;
  min-height: 60vh;
}

.order-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.order-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.order-card__badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(41, 151, 255, 0.12);
  color: var(--accent);
  border-radius: 980px;
  margin-bottom: 24px;
}

.order-summary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 28px;
}

.order-summary__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
}

.order-summary__row + .order-summary__row {
  border-top: 1px solid var(--border);
}

.order-summary__label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.order-summary__value {
  font-size: 0.95rem;
  font-weight: 600;
}

.order-summary__value--total {
  font-size: 1.25rem;
  color: var(--accent);
}

.order-card__divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

/* ===== Payment Page ===== */
.payment-page {
  padding: 48px 0;
  min-height: 60vh;
}

.payment-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
}

.payment-card__order-id {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.payment-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
  letter-spacing: -0.02em;
}

.payment-amount {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.payment-amount__label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.payment-details {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px;
  margin-bottom: 28px;
  text-align: left;
}

.payment-details__title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-align: center;
}

.payment-details__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  gap: 12px;
}

.payment-details__row + .payment-details__row {
  border-top: 1px solid var(--border);
}

.payment-details__label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.payment-details__value {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: inherit;
  background: rgba(41, 151, 255, 0.12);
  color: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.copy-btn:hover {
  background: rgba(41, 151, 255, 0.2);
}

.copy-btn:active {
  transform: scale(0.95);
}

.copy-btn--copied {
  background: rgba(48, 209, 88, 0.15);
  color: var(--success);
}

.payment-email {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.payment-email strong {
  color: var(--text);
}

.payment-timer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--warning);
  margin-top: 24px;
}

.payment-timer__dot {
  width: 8px;
  height: 8px;
  background: var(--warning);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ===== Status Page ===== */
.status-page {
  padding: 48px 0;
  min-height: 60vh;
}

.status-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.status-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.status-lookup {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
}

.status-lookup input {
  flex: 1;
  min-width: 0;
}

.status-result {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.status-result__icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.status-result__label {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.status-result__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.status-result--pending {
  border-color: rgba(255, 214, 10, 0.2);
}

.status-result--pending .status-result__label {
  color: var(--warning);
}

.status-result--paid {
  border-color: rgba(41, 151, 255, 0.2);
}

.status-result--paid .status-result__label {
  color: var(--info);
}

.status-result--completed {
  border-color: rgba(48, 209, 88, 0.2);
}

.status-result--completed .status-result__label {
  color: var(--success);
}

.status-result--cancelled {
  border-color: rgba(255, 69, 58, 0.2);
}

.status-result--cancelled .status-result__label {
  color: var(--error);
}

.status-result--error {
  border-color: rgba(255, 69, 58, 0.2);
}

.status-result--error .status-result__label {
  color: var(--error);
}

.status-auto-refresh {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 16px;
  opacity: 0.7;
}

/* ===== Spinner ===== */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner--large {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Loading overlay ===== */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  z-index: 1000;
}

.loading-overlay__text {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ===== Page-level message (empty state, loading) ===== */
.page-message {
  text-align: center;
  padding: 80px 20px;
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.page-message__icon {
  font-size: 3rem;
  opacity: 0.7;
}

.page-message__text {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* ===== Responsive utility ===== */
@media (max-width: 480px) {
  .order-card,
  .payment-card,
  .status-card,
  .custom-nominal__inner {
    padding: 28px 20px;
  }

  .payment-amount {
    font-size: 2rem;
  }

  .payment-details__row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .custom-nominal__input-group {
    flex-direction: column;
  }

  .status-lookup {
    flex-direction: column;
  }
}