/* ============================================
   WebPay - Base CSS
   Variables, reset, typography, layout
   ============================================ */

:root {
  /* ViePay — đêm / ngày (chủ đạo) */
  --vp-night: #461B65;
  --vp-day: #26C6DA;
  --vp-night-deep: #0d0614;
  --vp-night-surface: #241436;
  --vp-night-elevated: #2d1a42;
  --vp-night-border: #5c3d75;
  --vp-night-muted: #b89bc9;
  --vp-day-hover: #1fbad4;
  /* Nền theme ngày — xanh ngọc bích nhạt (chủ đạo, không trắng) */
  --vp-day-bg: #95eaf5;
  --vp-day-surface: #b8f0f8;
  --vp-day-muted: #c8eefa;

  /* Colors — trang công khai / light: accent ngày */
  --color-primary: #26C6DA;
  --color-primary-hover: #1fbad4;
  --color-success: #059669;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-bg: var(--vp-day-bg);
  --color-bg-card: var(--vp-day-surface);
  --color-border: rgba(15, 23, 42, 0.12);
  --color-shadow: rgba(0, 0, 0, 0.06);
  --color-shadow-lg: rgba(0, 0, 0, 0.1);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Typography */
  --font-family: 'Lexend', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 60px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* Layout */
.main-content {
  flex: 1;
  padding: var(--space-xl) var(--space-md);
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

/* ============================================
   Header
   ============================================ */
.app-header {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
}
.app-logo__img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 4px;
}

.app-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.app-nav a {
  color: var(--color-text);
  font-weight: 500;
}

.app-nav a:hover {
  color: var(--color-primary);
}

.app-nav .btn {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  font-weight: 500;
}

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

.app-nav .btn-primary:hover {
  background: var(--color-primary-hover);
  color: white;
}

/* ============================================
   Footer
   ============================================ */
.app-footer {
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-xl);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ============================================
   Components: Cards, Buttons, Forms
   ============================================ */
.card {
  background: var(--color-bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 1px 3px var(--color-shadow);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  font-family: inherit;
}

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

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

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

.btn-secondary:hover {
  background: #d1d5db;
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ============================================
   Page structure
   ============================================ */
.page-header {
  margin-bottom: var(--space-xl);
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
}

.page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ============================================
   Toast notification
   ============================================ */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-text);
  color: white;
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  box-shadow: 0 4px 12px var(--color-shadow-lg);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  z-index: 1000;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success { background: var(--color-success); }
.toast.error { background: var(--color-danger); }
.toast.warning { background: var(--color-warning); }

/* ============================================
   Auth pages - full background (login, register)
   ============================================ */
body.auth-page {
  display: block;
  background: var(--vp-night);
}

.auth-page-bg {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-xl);
  overflow: hidden;
}

.auth-page-bg__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}

.auth-lang-switcher {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10;
  font-size: 0.875rem;
}
.auth-lang-link {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
}
.auth-lang-link:hover {
  color: #fff;
}
.auth-lang-link--active {
  color: #fff;
  font-weight: 600;
  text-decoration: underline;
}
.auth-lang-sep {
  color: rgba(255,255,255,0.5);
  margin: 0 0.25rem;
}

.auth-page-bg .auth-form-wrap--left {
  position: relative;
  z-index: 1;
}

.auth-form-wrap {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.auth-form-wrap--left {
  margin-left: 8%;
  margin-right: auto;
}

.auth-form__title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: left;
  margin-bottom: var(--space-2xl);
  color: #fff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.auth-form-wrap .auth-form__title {
  color: #fff;
}

.auth-form {
  width: 100%;
  margin-bottom: var(--space-2xl);
}

.auth-form .form-group {
  margin-bottom: var(--space-lg);
}

.auth-form .form-label {
  color: #fff;
}

.auth-input {
  background: rgba(255,255,255,0.95);
  border: 1px solid rgba(255,255,255,0.5);
}

.auth-input:focus {
  background: #fff;
  border-color: var(--color-primary);
}

.auth-form__submit {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius);
  margin-top: var(--space-sm);
}

.auth-form__register {
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.9);
}

.auth-form__register a {
  color: #fff;
  font-weight: 600;
}

.auth-form__register a:hover {
  text-decoration: underline;
}

.auth-footer-links {
  display: flex;
  justify-content: flex-start;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
}

.auth-footer-links a {
  color: rgba(255,255,255,0.9);
}

.auth-footer-links a:hover {
  color: #fff;
}

@media (max-width: 768px) {
  .auth-form-wrap--left {
    margin-left: auto;
    margin-right: auto;
  }
}

/* ============================================
   Login page — ViePay (glass card, fintech bg)
   ============================================ */
body.auth-page:has(.login-page),
body.auth-page.auth-page--login {
  background: var(--vp-night-deep);
}

.login-page {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  overflow: hidden;
  font-family: 'Lexend', var(--font-family);
  box-sizing: border-box;
}

.login-page__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  z-index: 0;
  filter: blur(2px);
  transform: scale(1.03);
}

.login-page__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    105deg,
    rgba(70, 27, 101, 0.34) 0%,
    rgba(70, 27, 101, 0.2) 42%,
    rgba(70, 27, 101, 0.07) 68%,
    rgba(38, 198, 218, 0.03) 88%,
    transparent 95%
  );
}

.login-page .auth-lang-switcher {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 3;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(70, 27, 101, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(92, 61, 117, 0.55);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.2);
}

.login-page .auth-lang-link {
  color: rgba(233, 213, 255, 0.92);
}

.login-page .auth-lang-link:hover {
  color: #fff;
}

.login-page .auth-lang-link--active {
  color: #fff;
}

.login-page .auth-lang-sep {
  color: rgba(184, 155, 201, 0.55);
}

.login-page__content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 440px;
  margin-left: clamp(0.5rem, 8vw, 6rem);
  margin-right: auto;
}

.login-card {
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 3vw, 1.75rem) clamp(1.5rem, 4vw, 2rem);
  border-radius: 20px;
  background: rgba(70, 27, 101, 0.48);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(92, 61, 117, 0.5);
  box-shadow:
    0 8px 36px rgba(0, 0, 0, 0.28),
    0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}

.login-card__header {
  display: flex;
  flex-direction: column;
  margin: 0 0 1.25rem;
  text-align: center;
}

.login-card__logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
  height: 160px;
}

.login-card__logo {
  display: block;
  margin: 0;
  width: auto;
  height: auto;
  max-height: 160px;
  max-width: 100%;
  object-fit: contain;
  object-position: center;
  filter: drop-shadow(0 2px 14px rgba(0, 0, 0, 0.35));
}

.login-card__title {
  margin-top: 0.75rem;
  font-family: 'Manrope', 'Lexend', sans-serif;
  font-size: clamp(1.5rem, 4vw, 1.75rem);
  font-weight: 700;
  color: #f5f3ff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.login-card__form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.login-field {
  margin-bottom: 1.15rem;
}

.login-field__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: rgba(221, 214, 254, 0.95);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.login-field__input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: #faf5ff;
  background: rgba(13, 6, 20, 0.65);
  border: 1px solid rgba(92, 61, 117, 0.45);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.login-field__input::placeholder {
  color: rgba(196, 181, 253, 0.45);
}

.login-field__input:hover {
  border-color: rgba(38, 198, 218, 0.35);
  background: rgba(36, 20, 54, 0.75);
}

.login-field__input:focus {
  border-color: rgba(38, 198, 218, 0.65);
  box-shadow: 0 0 0 3px rgba(38, 198, 218, 0.15);
  background: rgba(36, 20, 54, 0.85);
}

.login-card__submit {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.85rem 1.25rem;
  font-family: 'Manrope', 'Lexend', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  background: linear-gradient(180deg, #4a1f5e 0%, #35124a 100%);
  border: 1px solid rgba(70, 27, 101, 0.7);
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(52, 18, 74, 0.5);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.login-card__submit:hover:not(:disabled) {
  filter: brightness(1.08);
  box-shadow: 0 6px 24px rgba(52, 18, 74, 0.6);
  transform: translateY(-1px);
}

.login-card__submit:active:not(:disabled) {
  transform: translateY(0);
}

.login-card__submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.login-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(92, 61, 117, 0.4);
  font-size: 0.8125rem;
}

.login-card__footer a {
  color: rgba(216, 180, 254, 0.92);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.login-card__footer a:hover {
  color: var(--vp-day);
}

@media (max-width: 768px) {
  .login-page {
    justify-content: center;
    padding: 1rem;
  }

  .login-page__content {
    margin-left: auto;
    margin-right: auto;
    max-width: 100%;
  }

  .login-page__scrim {
    background: linear-gradient(
      180deg,
      rgba(70, 27, 101, 0.3) 0%,
      rgba(70, 27, 101, 0.18) 50%,
      rgba(38, 198, 218, 0.04) 100%
    );
  }

  .login-page .auth-lang-switcher {
    top: 0.75rem;
    right: 0.75rem;
    font-size: 0.75rem;
  }
}