/* ══════════════════════════════════════════
   100% Грамр — Style System
   Modern SaaS, light theme, mint/cyan accents
   ══════════════════════════════════════════ */

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

:root {
  /* Brand palette */
  --color-mint-50: #effefb;
  --color-mint-100: #c7fff3;
  --color-mint-200: #90ffe7;
  --color-mint-300: #50f5d6;
  --color-mint-400: #1de4c2;
  --color-mint-500: #05c8a9;
  --color-mint-600: #00a18b;
  --color-mint-700: #058071;
  --color-mint-800: #09655b;
  --color-mint-900: #0d534c;

  /* Neutrals */
  --color-gray-50: #f8fafb;
  --color-gray-100: #f1f4f6;
  --color-gray-200: #e3e8ec;
  --color-gray-300: #cdd5db;
  --color-gray-400: #9ba7b3;
  --color-gray-500: #6b7a88;
  --color-gray-600: #4f5d6a;
  --color-gray-700: #3a4550;
  --color-gray-800: #252e36;
  --color-gray-900: #141a20;

  /* Semantic */
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-primary: var(--color-mint-600);
  --color-primary-hover: var(--color-mint-700);
  --color-primary-light: var(--color-mint-50);
  --color-text: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-500);
  --color-border: var(--color-gray-200);
  --color-error: #e5484d;
  --color-error-bg: #fff0f0;
  --color-success: #30a46c;
  --color-success-bg: #e9f9ee;
  --color-warning: #f5a623;
  --color-warning-bg: #fff8eb;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.09);

  /* Transitions */
  --transition-fast: 180ms ease;
  --transition-normal: 240ms ease;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  min-height: 100vh;
}

/* ─── Focus ring (A11y) ─── */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ─── Header ─── */
.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.header__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 18px;
  font-weight: 700;
}

.header__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

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

.header__email {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: none;
}

.header__logout {
  font-size: 13px;
  color: var(--color-text-secondary);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: none;
}

.header__logout:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
  color: var(--color-text);
}

/* ─── Main ─── */
.main {
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  min-height: calc(100vh - 70px);
}

/* ─── Screens ─── */
.screen {
  display: none;
  animation: fadeSlideIn var(--transition-normal) both;
}

.screen--active {
  display: block;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Loader ─── */
.loader-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  gap: var(--space-md);
  min-height: 300px;
}

.loader-card__text {
  font-size: 15px;
  color: var(--color-text-secondary);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner--sm {
  width: 18px;
  height: 18px;
  border-width: 2px;
  display: none;
}

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

/* ─── Card ─── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card__header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card__title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
}

/* ─── Auth Card ─── */
.auth-card {
  max-width: 440px;
  margin: var(--space-2xl) auto 0;
}

.auth-card__header {
  padding: var(--space-xl) var(--space-lg) var(--space-md);
  text-align: center;
}

.auth-card__title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.auth-card__subtitle {
  font-size: 15px;
  color: var(--color-text-secondary);
}

.auth-step {
  padding: var(--space-md) var(--space-lg) var(--space-xl);
  animation: fadeSlideIn var(--transition-normal) both;
}

.auth-step--hidden {
  display: none;
}

/* ─── Field ─── */
.field {
  margin-bottom: var(--space-md);
}

.field__label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: var(--space-xs);
}

.field__input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field__input::placeholder {
  color: var(--color-gray-400);
}

.field__input:hover {
  border-color: var(--color-gray-300);
}

.field__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 161, 139, 0.12);
}

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

.field__input--error:focus {
  box-shadow: 0 0 0 3px rgba(229, 72, 77, 0.12);
}

.field__input--otp {
  text-align: center;
  font-size: 24px;
  font-family: var(--font-mono);
  letter-spacing: 8px;
  padding: 12px 14px;
}

.field__error {
  font-size: 13px;
  color: var(--color-error);
  margin-top: var(--space-xs);
  min-height: 20px;
}

.field__status {
  font-size: 13px;
  margin-top: var(--space-xs);
  min-height: 20px;
}

.field__status--success {
  color: var(--color-success);
}

.field__status--error {
  color: var(--color-error);
}

.field__status--info {
  color: var(--color-text-secondary);
}

.captcha-block {
  margin-bottom: var(--space-md);
  padding: var(--space-sm);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.6);
}

.captcha-block--hidden {
  display: none;
}

.captcha-block__hint {
  margin: 0 0 var(--space-sm) 0;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.captcha-block__widget {
  min-height: 70px;
  display: flex;
  align-items: center;
}

.field__row {
  display: flex;
  gap: var(--space-sm);
}

.field__row .field__input {
  flex: 1;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

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

.btn--outline:hover:not(:disabled) {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

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

.btn--lg {
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
}

.btn--loading .btn__text {
  visibility: hidden;
}

.btn--loading .btn__loader {
  display: block;
  position: absolute;
}

.btn--primary.btn--loading .btn__loader {
  border-top-color: #fff;
}

.btn--outline.btn--loading .btn__loader {
  border-top-color: var(--color-text);
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  cursor: pointer;
  padding: 0;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.btn-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.btn-link:disabled {
  color: var(--color-gray-400);
  cursor: not-allowed;
  text-decoration: none;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--color-gray-50);
  color: var(--color-text);
}

/* ─── OTP ─── */
.otp-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
}

.otp-info__text {
  font-size: 14px;
  color: var(--color-gray-700);
}

.otp-info__email {
  font-weight: 600;
  color: var(--color-text);
}

.otp-retry {
  text-align: center;
  margin-top: var(--space-md);
}

/* ─── Dashboard ─── */
.dashboard {
  display: grid;
  gap: var(--space-lg);
}

/* ─── Payment return banner ─── */
.payment-banner {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  animation: fadeSlideIn var(--transition-normal) both;
}

.payment-banner--hidden {
  display: none;
}

.payment-banner--success {
  background: var(--color-success-bg);
  border: 1px solid #86efac;
  color: #166534;
}

.payment-banner--error {
  background: var(--color-error-bg);
  border: 1px solid #fca5a5;
  color: #991b1b;
}

.payment-banner--info {
  background: var(--color-primary-light);
  border: 1px solid var(--color-mint-200);
  color: var(--color-mint-800);
}

.payment-banner__icon {
  font-size: 20px;
  flex-shrink: 0;
}

.payment-banner__text {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
}

/* ─── Account card ─── */
.account-card__body {
  padding: var(--space-lg);
}

.account-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.account-info__avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-mint-300), var(--color-mint-600));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.account-info__email {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-all;
}

.account-info__plan {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.account-info__until {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ─── Badge ─── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge--free {
  background: var(--color-gray-100);
  color: var(--color-gray-600);
}

.badge--pro {
  background: var(--color-mint-100);
  color: var(--color-mint-800);
}

.badge--ultra {
  background: linear-gradient(135deg, #e8d5ff, #d5e8ff);
  color: #5b21b6;
}

/* ─── Plans grid ─── */
.plans-grid {
  padding: var(--space-lg);
  display: grid;
  gap: var(--space-md);
}

.plan-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  position: relative;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.plan-item:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-md);
}

.plan-item--accent {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.plan-item--accent:hover {
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
}

.plan-item__popular {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 12px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.plan-item__header {
  margin-bottom: var(--space-md);
}

.plan-item__name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.plan-item__price {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-text);
}

.plan-item__price--soon {
  font-size: 20px;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.plan-item__period {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.plan-item__features {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.plan-item__features li {
  font-size: 14px;
  color: var(--color-gray-600);
  padding: var(--space-xs) 0;
  padding-left: 20px;
  position: relative;
}

.plan-item__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 13px;
}

.plan-btn--current {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  cursor: default;
}

.plan-btn--blocked {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ─── Checkout ─── */
.checkout-card--hidden {
  display: none;
}

.checkout-body {
  padding: var(--space-lg);
}

.checkout-plan-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.promo-section {
  margin-bottom: var(--space-lg);
}

/* ─── Price breakdown ─── */
.price-breakdown {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.price-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-md);
  font-size: 14px;
  color: var(--color-gray-600);
}

.price-row + .price-row {
  border-top: 1px solid var(--color-border);
}

.price-row--discount {
  color: var(--color-success);
  background: var(--color-success-bg);
}

.price-row--hidden {
  display: none;
}

.price-row--total {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  background: var(--color-gray-50);
}

/* ─── Checkout Message ─── */
.checkout-message {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-bottom: var(--space-md);
}

.checkout-message--hidden {
  display: none;
}

.checkout-message--warning {
  background: var(--color-warning-bg);
  color: #92400e;
  border: 1px solid #fcd34d;
}

.checkout-message--info {
  background: var(--color-primary-light);
  color: var(--color-mint-800);
  border: 1px solid var(--color-mint-200);
}

.checkout-message--error {
  background: var(--color-error-bg);
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.checkout-message--success {
  background: var(--color-success-bg);
  color: #166534;
  border: 1px solid #86efac;
}

/* ─── Free badge ─── */
.free-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-success-bg);
  border: 1px solid #86efac;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  animation: fadeSlideIn var(--transition-normal) both;
}

.free-badge--hidden {
  display: none;
}

.free-badge__icon {
  font-size: 20px;
}

.free-badge__text {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-success);
}

.checkout-note {
  font-size: 12px;
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: var(--space-md);
  line-height: 1.5;
}

.checkout-note--hidden {
  display: none;
}

/* ─── Toast ─── */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn var(--transition-normal) both;
  max-width: 380px;
}

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

.toast--success {
  background: var(--color-success);
  color: #fff;
}

.toast--info {
  background: var(--color-gray-800);
  color: #fff;
}

.toast--out {
  animation: toastOut var(--transition-normal) both;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(16px) scale(0.96);
  }
}

/* ─── Desktop layout (>768px) ─── */
@media (min-width: 769px) {
  .header__email {
    display: block;
  }

  .dashboard {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }

  .payment-banner {
    grid-column: 1 / -1;
  }

  .account-card {
    grid-column: 1 / -1;
  }

  .plans-card {
    grid-column: 1 / -1;
  }

  .plans-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .checkout-card {
    grid-column: 1 / -1;
    max-width: 520px;
    justify-self: center;
    width: 100%;
  }
}

/* ─── Small screens ─── */
@media (max-width: 768px) {
  :root {
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;
  }

  .header__inner {
    padding: var(--space-sm) var(--space-md);
  }

  .main {
    padding: var(--space-md);
  }

  .auth-card {
    margin-top: var(--space-lg);
  }

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

  .otp-info {
    flex-direction: column;
    text-align: center;
  }

  .toast-container {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }

  .toast {
    max-width: 100%;
  }
}

/* ─── Utilities ─── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}