/* Refero / Apple España inspired design system */

:root {
  --color-text: #1d1d1f;
  --color-secondary: #707070;
  --color-deep-gray: #474747;
  --color-white: #ffffff;
  --color-canvas: #f5f5f7;
  --color-surface: #fafafc;
  --color-cool-wash: #e8e8ed;
  --color-blue: #0071e3;
  --color-blue-hover: #0077ed;
  --color-blue-active: #006edb;
  --color-link: #0066cc;
  --color-border: #d6d6d6;
  --color-error: #b64400;
  --color-success: #1f8a4c;
  --color-vk: #0077ff;
  --color-vk-hover: #0066dd;
  --color-vk-active: #005bcc;

  --radius-card: 28px;
  --radius-input: 18px;
  --radius-button: 9999px;

  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --header-h: 52px;
  --transition: 180ms ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.022em;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

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

a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 12px 16px;
  background: var(--color-text);
  color: var(--color-white);
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
}

/* ——— Header ——— */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

.site-header__inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  opacity: 0.8;
}

.settings-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 14px;
  border: 0;
  border-radius: var(--radius-button);
  background: transparent;
  color: var(--color-deep-gray);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.settings-trigger:hover {
  background: var(--color-cool-wash);
  color: var(--color-text);
}

.settings-trigger:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.settings-trigger__icon {
  flex-shrink: 0;
}

.api-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 4px;
  padding-left: 10px;
  border-left: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-success);
}

.api-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
}

.api-status--vk {
  color: var(--color-vk);
}

.api-status--vk .api-status__dot {
  background: var(--color-vk);
}

/* ——— Hero ——— */

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 72px 24px 56px;
  text-align: center;
}

.hero__eyebrow {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-secondary);
}

.hero__title {
  margin: 0 auto 18px;
  max-width: 16ch;
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--color-text);
}

.hero__subtitle {
  margin: 0 auto;
  max-width: 36ch;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--color-secondary);
}

/* ——— Workspace ——— */

.workspace {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 100px;
}

.workspace__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.panel {
  background: var(--color-canvas);
  border-radius: var(--radius-card);
  padding: 36px;
}

.panel--result {
  min-height: 420px;
  display: flex;
  flex-direction: column;
}

/* Mode switch */

.mode-switch {
  display: inline-flex;
  padding: 4px;
  margin-bottom: 28px;
  background: var(--color-cool-wash);
  border-radius: var(--radius-button);
}

.mode-switch__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--color-deep-gray);
  height: 36px;
  padding: 0 18px;
  border-radius: var(--radius-button);
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.mode-switch__btn.is-active {
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.mode-switch__btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* Fields */

.field {
  margin-bottom: 24px;
}

.field__label {
  display: block;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.field__control {
  width: 100%;
  padding: 14px 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  outline: none;
  transition: border-color var(--transition);
}

.field__control--textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.45;
}

.field__control::placeholder {
  color: #a1a1a6;
}

.field__control:hover {
  border-color: #c2c2c2;
}

.field__control:focus {
  border-color: var(--color-blue);
}

.tone-fieldset {
  margin: 0 0 24px;
  padding: 0;
  border: 0;
}

.tone-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tone-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--color-white);
  border: 1.5px solid transparent;
  border-radius: 20px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.tone-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tone-card__title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tone-card__desc {
  font-size: 13px;
  color: var(--color-secondary);
  letter-spacing: 0;
}

.tone-card:hover {
  border-color: #c7c7cc;
}

.tone-card.is-selected {
  border-color: var(--color-blue);
  background: #f0f7ff;
}

.tone-card:focus-within {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.form-error {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-radius: 14px;
  background: #fff4ee;
  color: var(--color-error);
  font-size: 15px;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-button);
  border: 1px solid transparent;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), opacity var(--transition), transform var(--transition);
}

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

.btn--primary {
  width: 100%;
  background: var(--color-blue);
  color: var(--color-white);
}

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

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

.btn--primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
  min-height: 40px;
  padding: 0 18px;
  font-size: 15px;
}

.btn--ghost:hover {
  background: var(--color-cool-wash);
}

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

.btn--copy-mobile {
  display: none;
  width: 100%;
  margin-top: 20px;
}

.btn--vk {
  width: 100%;
  background: var(--color-vk);
  color: var(--color-white);
}

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

.btn--vk:active:not(:disabled) {
  background: var(--color-vk-active);
}

.btn--small {
  min-height: 34px;
  padding: 0 14px;
  font-size: 14px;
}

.result__actions-top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.publish-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 8px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.schedule-row__label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-deep-gray);
}

.schedule-row__controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

.schedule-row__input {
  min-height: 44px;
}

/* Library */

.library {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.library__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.panel--library {
  padding: 28px;
}

.library__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.library__title {
  margin: 0;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.library__empty {
  margin: 0;
  color: var(--color-secondary);
  font-size: 15px;
}

.library-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.library-item {
  padding: 16px;
  background: var(--color-white);
  border-radius: 18px;
}

.library-item__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.library-item__title {
  font-size: 15px;
}

.library-item__meta {
  font-size: 13px;
  color: var(--color-secondary);
}

.library-item__status {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
}

.library-item__status--published {
  background: #e8f7ee;
  color: var(--color-success);
}

.library-item__status--failed {
  background: #fff4ee;
  color: var(--color-error);
}

.library-item__text {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--color-deep-gray);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  white-space: pre-wrap;
}

.library-item__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Settings tabs */

.modal__panel--wide {
  width: min(100%, 480px);
}

.settings-tabs {
  display: inline-flex;
  padding: 4px;
  margin-bottom: 20px;
  background: var(--color-cool-wash);
  border-radius: var(--radius-button);
}

.settings-tabs__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--color-deep-gray);
  height: 34px;
  padding: 0 16px;
  border-radius: var(--radius-button);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}

.settings-tabs__btn.is-active {
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.settings-pane[hidden] {
  display: none;
}

.field__help {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--color-secondary);
  line-height: 1.4;
}

/* Result */

.result-placeholder {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.result-placeholder[hidden] {
  display: none;
}

.result-placeholder__text {
  margin: 0;
  font-size: 21px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: #a1a1a6;
}

.result {
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: fadeRise 220ms ease;
}

.result[hidden] {
  display: none;
}

.result__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.result__title {
  margin: 0;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.result__usage {
  margin: 0.75rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-muted, #6b7280);
}

.result__body {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: -0.016em;
  color: var(--color-text);
  max-width: 62ch;
}

@keyframes fadeRise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Modal */

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.28);
}

.modal__panel {
  position: relative;
  width: min(100%, 420px);
  padding: 28px;
  background: var(--color-white);
  border-radius: var(--radius-card);
  animation: fadeRise 200ms ease;
}

.modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.modal__title {
  margin: 0;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.modal__close {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: var(--color-cool-wash);
  color: var(--color-deep-gray);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition);
}

.modal__close:hover {
  background: #dcdce0;
}

.modal__close:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.modal__hint {
  margin: 0 0 20px;
  font-size: 15px;
  color: var(--color-secondary);
}

.modal__hint.is-warn {
  color: var(--color-error);
}

/* Toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 200;
  transform: translateX(-50%) translateY(12px);
  padding: 12px 20px;
  background: var(--color-text);
  color: var(--color-white);
  border-radius: var(--radius-button);
  font-size: 15px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast[hidden] {
  display: block;
  visibility: hidden;
}

.toast.is-visible[hidden] {
  visibility: visible;
}

/* Responsive */

@media (max-width: 900px) {
  .hero {
    padding: 56px 20px 40px;
  }

  .workspace {
    padding: 0 20px 72px;
  }

  .workspace__grid,
  .library__grid {
    grid-template-columns: 1fr;
  }

  .schedule-row__controls {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 24px 20px;
  }

  .panel--result {
    min-height: 280px;
  }

  .result__head .btn--ghost {
    display: none;
  }

  .btn--copy-mobile {
    display: inline-flex;
  }

  .api-status__text {
    display: none;
  }
}

@media (max-width: 560px) {
  .site-header__inner {
    padding: 0 16px;
  }

  .settings-trigger span:not(.api-status):not(.api-status__dot):not(.api-status__text) {
    /* keep "Настройки" visible on small screens if space allows */
  }

  .hero {
    padding: 40px 16px 32px;
  }

  .hero__title {
    max-width: none;
  }

  .workspace {
    padding: 0 16px 56px;
  }

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

  .mode-switch {
    width: 100%;
  }

  .mode-switch__btn {
    flex: 1;
  }
}