/* ============================================================
   Admin Login — Light & Dark theme (CSS variables)
   ============================================================ */

/* --- Light mode (default) --- */
:root,
[data-theme="light"] {
  --bg-base: #f0f4f8;
  --bg-gradient-start: #e8eef6;
  --bg-gradient-end: #f8fafc;
  --orb-1: rgba(37, 99, 235, 0.18);
  --orb-2: rgba(99, 102, 241, 0.12);
  --grid-color: rgba(15, 23, 42, 0.04);

  --card-bg: rgba(255, 255, 255, 0.92);
  --card-border: rgba(15, 23, 42, 0.08);
  --card-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.06),
    0 20px 50px -12px rgba(15, 23, 42, 0.12);

  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --label: #334155;

  --input-bg: #f8fafc;
  --input-border: #e2e8f0;
  --input-border-focus: #2563eb;
  --input-placeholder: #94a3b8;
  --input-icon: #94a3b8;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --accent-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);

  --error-bg: #fef2f2;
  --error-text: #b91c1c;
  --error-border: #fecaca;

  --toggle-bg: rgba(255, 255, 255, 0.85);
  --toggle-border: rgba(15, 23, 42, 0.1);
  --toggle-hover: #f1f5f9;

  --logo-ring: rgba(37, 99, 235, 0.15);
  --footer-badge-bg: #eff6ff;
  --footer-badge-text: #1d4ed8;

  --checkbox-bg: #fff;
  --checkbox-border: #cbd5e1;
  --checkbox-checked: #2563eb;

  /* Fluid spacing — scales with viewport */
  --page-pad-x: clamp(16px, 4vw, 32px);
  --page-pad-y: clamp(20px, 5vh, 48px);
  --card-pad-x: clamp(22px, 4vw, 40px);
  --card-pad-y: clamp(28px, 4vh, 44px);
  --field-gap: clamp(16px, 2.5vh, 22px);
  --radius-card: clamp(16px, 2vw, 24px);
  --radius-input: clamp(10px, 1.5vw, 14px);

  --brand-bg: linear-gradient(145deg, rgba(37, 99, 235, 0.12) 0%, rgba(79, 70, 229, 0.08) 100%);
  --brand-border: rgba(37, 99, 235, 0.15);
  --brand-accent: #2563eb;
}

/* --- Dark mode --- */
[data-theme="dark"] {
  --bg-base: #030712;
  --bg-gradient-start: #050812;
  --bg-gradient-end: #0f172a;
  --orb-1: rgba(37, 99, 235, 0.22);
  --orb-2: rgba(139, 92, 246, 0.15);
  --grid-color: rgba(255, 255, 255, 0.03);

  --card-bg: rgba(15, 23, 42, 0.75);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
    0 25px 50px -12px rgba(0, 0, 0, 0.5);

  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --label: #e2e8f0;

  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-border-focus: #3b82f6;
  --input-placeholder: #64748b;
  --input-icon: #64748b;

  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
  --accent-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);

  --error-bg: rgba(127, 29, 29, 0.25);
  --error-text: #fca5a5;
  --error-border: rgba(248, 113, 113, 0.3);

  --toggle-bg: rgba(15, 23, 42, 0.8);
  --toggle-border: rgba(255, 255, 255, 0.1);
  --toggle-hover: rgba(255, 255, 255, 0.06);

  --logo-ring: rgba(59, 130, 246, 0.25);
  --footer-badge-bg: rgba(37, 99, 235, 0.2);
  --footer-badge-text: #93c5fd;

  --checkbox-bg: rgba(255, 255, 255, 0.05);
  --checkbox-border: rgba(255, 255, 255, 0.2);
  --checkbox-checked: #3b82f6;

  --brand-bg: linear-gradient(145deg, rgba(37, 99, 235, 0.18) 0%, rgba(124, 58, 237, 0.12) 100%);
  --brand-border: rgba(59, 130, 246, 0.2);
  --brand-accent: #60a5fa;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: clamp(0.9375rem, 1.5vw, 1rem);
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-base);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding:
    max(var(--page-pad-y), env(safe-area-inset-top, 0px))
    max(var(--page-pad-x), env(safe-area-inset-right, 0px))
    max(var(--page-pad-y), env(safe-area-inset-bottom, 0px))
    max(var(--page-pad-x), env(safe-area-inset-left, 0px));
  overflow-x: hidden;
  overflow-y: auto;
  transition: background-color 0.35s ease, color 0.35s ease;
}

/* --- Animated background --- */
.login-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: linear-gradient(160deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  transition: background 0.35s ease;
}

.login-bg__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  transition: background 0.35s ease;
}

.login-bg__orb--1 {
  width: clamp(280px, 45vw, 520px);
  height: clamp(280px, 45vw, 520px);
  top: clamp(-140px, -12vw, -80px);
  right: clamp(-100px, -8vw, -40px);
  background: var(--orb-1);
}

.login-bg__orb--2 {
  width: clamp(240px, 38vw, 440px);
  height: clamp(240px, 38vw, 440px);
  bottom: clamp(-120px, -10vw, -60px);
  left: clamp(-80px, -6vw, -20px);
  background: var(--orb-2);
}

.login-bg__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 20%, transparent 75%);
}

/* --- Theme toggle --- */
.theme-toggle {
  position: fixed;
  top: max(16px, env(safe-area-inset-top, 0px));
  right: max(16px, env(safe-area-inset-right, 0px));
  z-index: 100;
  width: clamp(44px, 10vw, 48px);
  height: clamp(44px, 10vw, 48px);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--toggle-border);
  border-radius: 12px;
  background: var(--toggle-bg);
  color: var(--text-secondary);
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

.theme-toggle:hover {
  background: var(--toggle-hover);
  color: var(--text);
  transform: scale(1.04);
}

.theme-toggle:active {
  transform: scale(0.98);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition: opacity 0.25s, transform 0.25s;
}

[data-theme="light"] .theme-toggle .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(-30deg) scale(0.6);
}

[data-theme="dark"] .theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(30deg) scale(0.6);
}

[data-theme="dark"] .theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* --- Layout --- */
.login-page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: min(960px, 100%);
  margin: 0 auto;
}

.login-shell {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vh, 28px);
  width: 100%;
}

.login-card {
  flex: 1;
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  padding: var(--card-pad-y) var(--card-pad-x);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.35s, border-color 0.35s, box-shadow 0.35s;
}

/* --- Brand panel (tablet & desktop) --- */
.login-brand {
  display: none;
}

.login-brand__inner {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2vh, 20px);
}

.login-brand__logo {
  width: clamp(56px, 8vw, 72px);
  height: clamp(56px, 8vw, 72px);
  border-radius: 14px;
  object-fit: cover;
}

.login-brand__title {
  margin: 0;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text);
}

.login-brand__text {
  margin: 0;
  font-size: clamp(0.875rem, 1.6vw, 1rem);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 36ch;
}

.login-brand__features {
  margin: clamp(8px, 1.5vh, 16px) 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 1.2vh, 12px);
}

.login-brand__features li {
  position: relative;
  padding-left: 1.5rem;
  font-size: clamp(0.8125rem, 1.4vw, 0.9375rem);
  color: var(--text-secondary);
  line-height: 1.45;
}

.login-brand__features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* --- Header --- */
.login-header {
  text-align: center;
  margin-bottom: clamp(22px, 4vh, 32px);
}

.logo-wrap {
  display: inline-flex;
  padding: 4px;
  border-radius: 16px;
  background: var(--logo-ring);
  margin-bottom: 16px;
  transition: background 0.35s;
}

.logo {
  width: clamp(56px, 14vw, 72px);
  height: clamp(56px, 14vw, 72px);
  border-radius: 12px;
  display: block;
  object-fit: cover;
}

.login-header h1 {
  margin: 0 0 clamp(4px, 1vh, 8px);
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.subtitle {
  margin: 0 auto;
  max-width: 32ch;
  font-size: clamp(0.8125rem, 2.5vw, 0.9375rem);
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- Form fields --- */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.field {
  margin-bottom: var(--field-gap);
}

.field label {
  display: block;
  font-size: clamp(0.8125rem, 2vw, 0.875rem);
  font-weight: 500;
  color: var(--label);
  margin-bottom: clamp(6px, 1vh, 10px);
  transition: color 0.35s;
}

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

.input-icon {
  position: absolute;
  left: 14px;
  color: var(--input-icon);
  pointer-events: none;
  flex-shrink: 0;
  transition: color 0.2s;
}

.input-wrap:focus-within .input-icon {
  color: var(--accent);
}

.input-wrap input {
  width: 100%;
  min-height: 48px;
  padding: clamp(12px, 2vh, 14px) clamp(12px, 2vw, 16px) clamp(12px, 2vh, 14px) clamp(40px, 10vw, 48px);
  font-size: max(16px, clamp(0.9375rem, 2.5vw, 1rem));
  font-family: inherit;
  color: var(--text);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-input);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.35s, color 0.35s;
}

.input-wrap input::placeholder {
  color: var(--input-placeholder);
}

.input-wrap input:hover {
  border-color: var(--input-border-focus);
}

.input-wrap input:focus {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

[data-theme="dark"] .input-wrap input:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

#password {
  padding-right: clamp(44px, 12vw, 52px);
}

.password-toggle {
  position: absolute;
  right: clamp(6px, 1.5vw, 10px);
  display: flex;
  align-items: center;
  justify-content: center;
  width: clamp(40px, 10vw, 44px);
  height: clamp(40px, 10vw, 44px);
  padding: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--input-icon);
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.password-toggle:hover {
  color: var(--text-secondary);
  background: var(--toggle-hover);
}

.password-toggle .icon-eye-off {
  display: none;
}

.password-toggle.is-visible .icon-eye {
  display: none;
}

.password-toggle.is-visible .icon-eye-off {
  display: block;
}

/* --- Remember me --- */
.field-row {
  margin-bottom: 8px;
}

.remember {
  display: inline-flex;
  align-items: center;
  gap: clamp(8px, 2vw, 12px);
  font-size: clamp(0.8125rem, 2.5vw, 0.9375rem);
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  min-height: 44px;
  padding: 4px 0;
  transition: color 0.35s;
}

.remember input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.remember-box {
  width: clamp(18px, 4.5vw, 20px);
  height: clamp(18px, 4.5vw, 20px);
  border-radius: 5px;
  border: 1.5px solid var(--checkbox-border);
  background: var(--checkbox-bg);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}

.remember-box::after {
  content: "";
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  margin-top: -2px;
  transition: transform 0.15s ease;
}

.remember input:checked + .remember-box {
  background: var(--checkbox-checked);
  border-color: var(--checkbox-checked);
}

.remember input:checked + .remember-box::after {
  transform: rotate(45deg) scale(1);
}

.remember input:focus-visible + .remember-box {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- Error --- */
.error {
  min-height: 20px;
  margin: 4px 0 12px;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--error-text);
  line-height: 1.4;
}

.error:not(:empty) {
  padding: 10px 12px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: 10px;
}

/* --- Submit button --- */
.primary {
  position: relative;
  width: 100%;
  min-height: 52px;
  padding: clamp(14px, 2.5vh, 16px) clamp(20px, 4vw, 24px);
  font-size: clamp(0.9375rem, 2.5vw, 1rem);
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  border: none;
  border-radius: var(--radius-input);
  background: var(--accent-gradient);
  box-shadow: var(--accent-shadow);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.primary:active:not(:disabled) {
  transform: translateY(0);
}

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

.primary.is-loading .btn-text {
  opacity: 0;
}

.btn-spinner {
  display: none;
  position: absolute;
  inset: 0;
  margin: auto;
  width: 22px;
  height: 22px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.primary.is-loading .btn-spinner {
  display: block;
}

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

/* --- Footer --- */
.footer-note {
  margin-top: clamp(20px, 4vh, 28px);
  padding-top: clamp(16px, 3vh, 24px);
  border-top: 1px solid var(--card-border);
  font-size: clamp(0.6875rem, 2vw, 0.8125rem);
  color: var(--text-muted);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(6px, 1.5vh, 10px);
  transition: border-color 0.35s, color 0.35s;
}

.footer-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--footer-badge-text);
  background: var(--footer-badge-bg);
  border-radius: 6px;
  transition: background 0.35s, color 0.35s;
}

/* ============================================================
   Responsive — all devices
   ============================================================ */

/* Small phones (320px – 374px) */
@media (max-width: 374px) {
  body {
    align-items: flex-start;
  }

  .login-header h1 {
    font-size: 1.25rem;
  }

  .input-icon {
    left: 12px;
    width: 16px;
    height: 16px;
  }
}

/* Phones — full width, scrollable, airy padding */
@media (max-width: 599px) {
  body {
    align-items: flex-start;
    padding-top: max(72px, calc(env(safe-area-inset-top, 0px) + 56px));
  }

  .login-page {
    max-width: 100%;
  }

  .login-card {
    border-radius: clamp(14px, 4vw, 20px);
  }

  .login-header .logo-wrap {
    margin-bottom: clamp(12px, 2vh, 16px);
  }
}

/* Short screens — keyboard / landscape phone */
@media (max-height: 520px) and (orientation: landscape) {
  body {
    align-items: flex-start;
    padding-top: max(60px, env(safe-area-inset-top, 0px));
    padding-bottom: 16px;
  }

  .login-header {
    margin-bottom: 16px;
  }

  .login-header .logo-wrap,
  .logo-wrap {
    margin-bottom: 8px;
  }

  .logo {
    width: 48px;
    height: 48px;
  }

  .field {
    margin-bottom: 12px;
  }

  .footer-note {
    margin-top: 16px;
    padding-top: 12px;
  }
}

/* Tablets — wider card, more breathing room */
@media (min-width: 600px) {
  .login-page {
    max-width: min(480px, 92vw);
  }

  .login-shell {
    gap: 24px;
  }
}

@media (min-width: 768px) {
  body {
    align-items: center;
  }

  .login-page {
    max-width: min(520px, 88vw);
  }

  .login-card {
    padding: clamp(36px, 5vh, 48px) clamp(36px, 5vw, 48px);
  }
}

/* Tablet landscape & small laptop — split layout */
@media (min-width: 900px) {
  .login-page {
    max-width: min(920px, 94vw);
  }

  .login-shell {
    flex-direction: row;
    align-items: stretch;
    gap: 0;
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .login-brand {
    display: flex;
    flex: 1 1 42%;
    min-width: 0;
    padding: clamp(32px, 4vw, 48px);
    background: var(--brand-bg);
    border-right: 1px solid var(--brand-border);
    align-items: center;
  }

  .login-brand__inner {
    max-width: 100%;
  }

  .login-card {
    flex: 1 1 58%;
    min-width: 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: clamp(36px, 4vw, 52px) clamp(32px, 4vw, 48px);
  }

  /* Hide duplicate logo in form when brand panel visible */
  .login-header .logo-wrap {
    display: none;
  }

  .login-header h1 {
    text-align: left;
    font-size: clamp(1.4rem, 2vw, 1.65rem);
  }

  .subtitle {
    text-align: left;
    margin-left: 0;
    max-width: none;
  }

  .login-header {
    text-align: left;
    margin-bottom: clamp(24px, 3vh, 32px);
  }

  .footer-note {
    align-items: flex-start;
    text-align: left;
  }
}

/* Large desktop — extra spacious */
@media (min-width: 1200px) {
  .login-page {
    max-width: min(980px, 90vw);
  }

  .login-brand {
    flex: 1 1 44%;
    padding: clamp(40px, 4vw, 56px);
  }

  .login-card {
    flex: 1 1 56%;
    padding: clamp(44px, 4vw, 56px) clamp(40px, 4vw, 56px);
  }
}

/* Ultra-wide — cap width, stay centered */
@media (min-width: 1600px) {
  .login-page {
    max-width: 1020px;
  }
}

/* Touch devices — disable hover lift on button */
@media (hover: none) and (pointer: coarse) {
  .primary:hover:not(:disabled) {
    transform: none;
  }

  .theme-toggle:hover {
    transform: none;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}