/* ============================================================
   ACID BEAST - Authentication Pages
   Styles specific to login/register pages

   This file contains:
   - Background effects (grid, glows, shapes)
   - Page layout (container, brand, auth sections)
   - Form elements (fields, inputs, buttons)
   - Animations and transitions
   ============================================================ */

/* ==================== Background Effects ==================== */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(190, 250, 0, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(190, 250, 0, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  transform: perspective(500px) rotateX(60deg);
  transform-origin: center top;
  animation: grid-scroll 20s linear infinite;
}

@keyframes grid-scroll {
  0% { background-position: 0 0; }
  100% { background-position: 0 60px; }
}

.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  animation: glow-pulse 8s ease-in-out infinite;
}

.bg-glow--1 {
  width: 600px;
  height: 600px;
  background: var(--acid);
  top: -200px;
  left: -100px;
  animation-delay: 0s;
}

.bg-glow--2 {
  width: 400px;
  height: 400px;
  background: var(--hot);
  bottom: -100px;
  right: -50px;
  animation-delay: -4s;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.1); }
}

.bg-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.1) 2px,
    rgba(0, 0, 0, 0.1) 4px
  );
  pointer-events: none;
}

/* Floating Shapes */
.shapes {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.shape {
  position: absolute;
  border: 2px solid;
  opacity: 0.15;
}

.shape--1 {
  width: 300px;
  height: 300px;
  border-color: var(--acid);
  top: 15%;
  right: 10%;
  transform: rotate(45deg);
  animation: float-1 12s ease-in-out infinite;
}

.shape--2 {
  width: 150px;
  height: 150px;
  border-color: var(--hot);
  bottom: 20%;
  left: 5%;
  border-radius: 50%;
  animation: float-2 10s ease-in-out infinite;
}

.shape--3 {
  width: 80px;
  height: 80px;
  border-color: var(--acid);
  top: 60%;
  right: 25%;
  clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
  animation: float-3 8s ease-in-out infinite;
}

@keyframes float-1 {
  0%, 100% { transform: rotate(45deg) translate(0, 0); }
  50% { transform: rotate(45deg) translate(20px, -30px); }
}

@keyframes float-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-15px, 20px) scale(1.05); }
}

@keyframes float-3 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(10px, -15px) rotate(180deg); }
}

/* ==================== Page Layout ==================== */
.page {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-6);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
}

@media (max-width: 968px) {
  .container {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* ==================== Brand Section ==================== */
.brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.brand-inner {
  animation: brand-in 0.8s var(--ease-out) both;
}

@keyframes brand-in {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.brand-badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: var(--acid-muted);
  color: var(--acid);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  clip-path: polygon(
    0 0,
    calc(100% - 8px) 0,
    100% 8px,
    100% 100%,
    8px 100%,
    0 calc(100% - 8px)
  );
  margin-bottom: var(--space-4);
  width: fit-content;
}

.brand-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.brand-title-line {
  display: block;
}

.brand-title-line--accent {
  color: var(--acid);
  text-shadow: 0 0 30px var(--acid-glow);
}

.brand-tagline {
  font-size: 18px;
  color: var(--text-dim);
  line-height: 1.6;
  max-width: 500px;
}

.brand-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--acid);
  text-shadow: 0 0 20px var(--acid-glow);
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ==================== Auth Section ==================== */
.auth {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  outline: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-8);
  position: relative;
  clip-path: polygon(
    0 0,
    calc(100% - 24px) 0,
    100% 24px,
    100% 100%,
    24px 100%,
    0 calc(100% - 24px)
  );
  animation: card-in 0.8s var(--ease-out) both;
  animation-delay: 0.3s;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Corner accents */
.auth-card::before,
.auth-card::after {
  content: '';
  position: absolute;
  width: 40px;
  height: 2px;
  background: var(--acid);
  box-shadow: 0 0 10px var(--acid-glow);
}

.auth-card::before {
  top: 12px;
  right: 0;
  transform: rotate(-45deg);
  transform-origin: right;
}

.auth-card::after {
  bottom: 12px;
  left: 0;
  transform: rotate(-45deg);
  transform-origin: left;
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.auth-title {
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: 0.05em;
}

/* ==================== Form Elements ==================== */
.panel {
  display: none;
}

.panel.active {
  display: block;
  animation: panel-in 0.4s var(--ease-out);
}

@keyframes panel-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.field {
  margin-bottom: var(--space-5);
}

.field-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
}

.field-input-wrap {
  position: relative;
}

.field-input-wrap--grow {
  flex: 1;
}

.field-row {
  display: flex;
  gap: var(--space-3);
}

.field-input {
  width: 100%;
  height: 52px;
  padding: 0 var(--space-4);
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text);
  background: var(--void-light);
  border: 1px solid rgba(255, 255, 255, 0.08);
  outline: none;
  transition: all 0.2s ease;
}

.field-input::placeholder {
  color: var(--text-muted);
}

.field-input:focus {
  border-color: var(--acid);
  background: var(--void);
  box-shadow: 0 0 0 3px var(--acid-muted);
}

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

.field-input--error {
  border-color: var(--hot);
}

.field-input--error:focus {
  box-shadow: 0 0 0 3px rgba(255, 46, 99, 0.12);
}

.field-icon {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.field-toggle {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: var(--space-2);
  transition: color 0.2s ease;
}

.field-toggle:hover {
  color: var(--acid);
}

.field-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: var(--space-2);
}

.field-error {
  font-size: 12px;
  color: var(--hot);
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ==================== Buttons ==================== */
.btn {
  width: 100%;
  height: 52px;
  padding: 0 var(--space-6);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  outline: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--acid);
  color: var(--void);
  box-shadow: 0 0 20px var(--acid-glow);
}

.btn--primary:hover:not(:disabled) {
  background: var(--acid-dim);
  box-shadow: 0 0 30px var(--acid-glow);
}

.btn--primary:active:not(:disabled) {
  box-shadow: 0 0 15px var(--acid-glow);
}

.btn--secondary {
  background: var(--surface-light);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn--secondary:hover:not(:disabled) {
  border-color: var(--acid);
  color: var(--acid);
}

.btn--ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.btn--ghost:hover:not(:disabled) {
  border-color: var(--acid);
  color: var(--acid);
}

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

.btn--loading {
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: var(--space-2);
}

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

/* ==================== Messages ==================== */
.message {
  padding: var(--space-4);
  margin-bottom: var(--space-5);
  border-left: 3px solid;
  font-size: 14px;
  animation: message-in 0.3s var(--ease-out);
}

@keyframes message-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message--success {
  background: rgba(16, 185, 129, 0.1);
  border-color: #10b981;
  color: #10b981;
}

.message--error {
  background: rgba(255, 46, 99, 0.1);
  border-color: var(--hot);
  color: var(--hot);
}

.message--info {
  background: var(--acid-muted);
  border-color: var(--acid);
  color: var(--acid);
}

/* ==================== Links & Dividers ==================== */
.auth-link {
  display: block;
  text-align: center;
  margin-top: var(--space-5);
  font-size: 14px;
  color: var(--text-dim);
}

.auth-link a {
  color: var(--acid);
  font-weight: 600;
  transition: color 0.2s ease;
}

.auth-link a:hover {
  color: var(--acid-dim);
  text-decoration: underline;
}

.divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

/* ==================== OAuth Buttons ==================== */
.oauth-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.oauth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  height: 48px;
  padding: 0 var(--space-5);
  background: var(--surface-light);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.oauth-btn:hover {
  border-color: var(--acid);
  background: var(--surface);
}

.oauth-btn i {
  font-size: 18px;
}

/* ==================== Tabs/Switcher ==================== */
.auth-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  background: var(--void-light);
  padding: var(--space-2);
  border-radius: var(--radius-md);
}

.auth-tab {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: var(--radius-sm);
}

.auth-tab:hover {
  color: var(--text);
}

.auth-tab.active {
  background: var(--surface);
  color: var(--acid);
}

/* ==================== Responsive ==================== */
@media (max-width: 968px) {
  .brand {
    text-align: center;
  }

  .brand-badge {
    margin-left: auto;
    margin-right: auto;
  }

  .brand-tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .brand-stats {
    justify-content: center;
  }

  .auth {
    padding: var(--space-4);
  }

  .auth-card {
    padding: var(--space-6);
  }
}

@media (max-width: 480px) {
  .brand-title {
    font-size: 32px;
  }

  .brand-stats {
    gap: var(--space-6);
  }

  .stat-value {
    font-size: 24px;
  }

  .auth-card {
    padding: var(--space-5);
  }

  .field-input,
  .btn {
    height: 48px;
  }
}