/* ===== Variables ===== */
:root {
  --color-primary: #0600b8;
  --color-primary-light: #4f46e5;
  --color-primary-dark: #04008a;
  --color-primary-glow: rgba(6, 0, 184, 0.15);

  --color-bg: #f0f2f8;
  --color-surface: #ffffff;
  --color-text: #1a1d2e;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-border: #e5e7eb;
  --color-border-focus: #0600b8;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;

  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05),
                 0 20px 50px -12px rgba(6, 0, 184, 0.12);
  --shadow-input: 0 1px 2px rgba(0, 0, 0, 0.04);

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Vazirmatn', system-ui, -apple-system, sans-serif;
}

/* ===== Reset & Base ===== */
*,
*::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);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem 5rem;
  position: relative;
  overflow-x: hidden;
}

/* ===== Background ===== */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.bg-shape--1 {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, #0600b8 0%, #6366f1 100%);
  top: -150px;
  right: -100px;
  opacity: 0.12;
}

.bg-shape--2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, #818cf8 0%, #0600b8 100%);
  bottom: -100px;
  left: -80px;
  opacity: 0.1;
}

.bg-shape--3 {
  width: 300px;
  height: 300px;
  background: #c7d2fe;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.08;
}

/* ===== Login Page ===== */
.login-page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 900px;
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(255, 255, 255, 0.8);
  overflow: hidden;
}

.login-card__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 520px;
}

.login-card__panel {
  display: flex;
  flex-direction: column;
}

.login-card__panel--form {
  justify-content: center;
  border-left: 1px solid var(--color-border);
}

.login-card__panel--brand {
  position: relative;
  justify-content: center;
  align-items: center;
  padding: 2.5rem 2rem;
  background: linear-gradient(
    145deg,
    var(--color-primary-dark) 0%,
    var(--color-primary) 45%,
    var(--color-primary-light) 100%
  );
  overflow: hidden;
}

/* ===== Brand Panel Decor ===== */
.brand-panel__decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.brand-panel__circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.brand-panel__circle--1 {
  width: 280px;
  height: 280px;
  top: -80px;
  left: -60px;
}

.brand-panel__circle--2 {
  width: 180px;
  height: 180px;
  bottom: -40px;
  right: -30px;
  background: rgba(255, 255, 255, 0.08);
}

.brand-panel__circle--3 {
  width: 100px;
  height: 100px;
  bottom: 30%;
  left: 15%;
  background: rgba(255, 255, 255, 0.05);
}

/* ===== Center Brand ===== */
.center-brand {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 320px;
}

.center-brand__logo-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 112px;
  height: 112px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15),
              0 0 0 1px rgba(255, 255, 255, 0.2);
  margin-bottom: 1.5rem;
  transition: transform var(--transition);
}

.center-brand__logo-wrap:hover {
  transform: scale(1.04);
}

.center-brand__logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.center-brand__name {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.center-brand__subtitle {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  margin-bottom: 1rem;
}

.center-brand__desc {
  font-size: 0.8125rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 400;
}

/* ===== Login Form ===== */
.login-form-section {
  padding: 2.5rem 2.5rem;
  width: 100%;
}

.login-form__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.login-form__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group.has-error .form-input {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.form-group.has-error .form-input:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  right: 0.875rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  pointer-events: none;
  transition: color var(--transition);
}

.form-input {
  width: 100%;
  padding: 0.75rem 2.75rem 0.75rem 0.875rem;
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: #f9fafb;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition),
              box-shadow var(--transition),
              background var(--transition);
  box-shadow: var(--shadow-input);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-input:hover {
  border-color: #d1d5db;
  background: #fff;
}

.form-input:focus {
  border-color: var(--color-border-focus);
  background: #fff;
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-input:focus + .toggle-password,
.input-wrap:focus-within .input-icon {
  color: var(--color-primary);
}

.toggle-password {
  position: absolute;
  left: 0.625rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-light);
  padding: 0.25rem;
  display: flex;
  align-items: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.toggle-password:hover {
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

.form-error {
  font-size: 0.75rem;
  color: var(--color-error);
  min-height: 1rem;
  display: block;
}

/* ===== Login Button ===== */
.btn-login {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.875rem 1.5rem;
  margin-top: 0.25rem;
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition),
              box-shadow var(--transition),
              opacity var(--transition);
  box-shadow: 0 4px 14px rgba(6, 0, 184, 0.35);
}

.btn-login::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn-login:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(6, 0, 184, 0.4);
}

.btn-login:hover:not(:disabled)::before {
  opacity: 1;
}

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

.btn-login:disabled {
  opacity: 0.75;
  cursor: not-allowed;
}

.btn-login.is-loading .btn-login__text {
  opacity: 0;
}

.btn-login.is-loading .btn-login__loader {
  display: flex !important;
  position: absolute;
}

.spinner {
  animation: spin 0.8s linear infinite;
}

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

/* ===== App Footer ===== */
.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 1rem;
  background: linear-gradient(180deg, transparent 0%, rgba(240, 242, 248, 0.9) 30%);
}

.app-footer__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.app-footer__logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  opacity: 0.85;
}

.app-footer__name {
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.app-footer__divider {
  color: var(--color-border);
  font-weight: 300;
}

.app-footer__version {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-variant-numeric: tabular-nums;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .login-page {
    max-width: 440px;
  }

  .login-card__inner {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .login-card__panel--form {
    order: 2;
    border-left: none;
    border-top: 1px solid var(--color-border);
  }

  .login-card__panel--brand {
    order: 1;
    padding: 2rem 1.5rem;
  }

  .center-brand__desc {
    display: none;
  }

  .center-brand__logo-wrap {
    width: 88px;
    height: 88px;
    margin-bottom: 1rem;
  }

  .center-brand__logo {
    width: 68px;
    height: 68px;
  }

  .center-brand__name {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 1rem 0.75rem 4.5rem;
    justify-content: flex-start;
    padding-top: 2rem;
  }

  .login-card {
    border-radius: var(--radius-lg);
  }

  .login-form-section {
    padding: 1.5rem 1.25rem 2rem;
  }

  .login-card__panel--brand {
    padding: 1.75rem 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}