/* ============================================================
   auth.css — Road Ready JA
   Panel slide animation:
     Register → yellow panel LEFT,  form RIGHT
     Login    → yellow panel RIGHT, form LEFT
   Both panels are absolutely positioned children of .card
   so they can cross over each other during the slide.
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500;600&display=swap");

/* ── Variables ───────────────────────────────────────────── */
:root {
  --bg: #1a1a1a;
  --surface: #242424;
  --surface-2: #2e2e2e;
  --border: #3a3a3a;
  --accent: #f0d316;
  --accent-dim: #f0b026;
  --text: #e8e3dc;
  --text-muted: #8a857e;
  --text-subtle: #5a5550;
  --error: #e05555;
  --success: #4caf87;
  --font-ui: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --slide-dur: 0.5s;
  --slide-ease: cubic-bezier(0.77, 0, 0.18, 1);
  --panel-w: 300px; /* yellow panel width */
}

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  padding-top: 52px;
}

/* ── Card ────────────────────────────────────────────────── */
.card {
  width: 780px;
  min-height: 480px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--bg);
  position: relative; /* anchor for absolute children */
  overflow: hidden;
}

/* ════════════════════════════════════════════════════════════
   YELLOW PANEL
   Absolutely positioned so it can slide freely across the card.
   Register state: sits on the LEFT  (left: 0)
   Login state:    sits on the RIGHT (left: calc(100% - 300px))
   ════════════════════════════════════════════════════════════ */
.panel-left {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--panel-w);
  background: var(--accent);
  color: #1a1a1a;
  display: flex;
  flex-direction: column;
  padding: 28px;
  overflow: hidden;
  z-index: 2;
  transition: left var(--slide-dur) var(--slide-ease);
}

/* Login: slide panel to the right edge */
.card.is-login .panel-left {
  left: calc(100% - var(--panel-w));
}

/* Grid texture */
.panel-left::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(0, 0, 0, 0.07) 39px,
      rgba(0, 0, 0, 0.07) 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 39px,
      rgba(0, 0, 0, 0.05) 39px,
      rgba(0, 0, 0, 0.05) 40px
    );
  pointer-events: none;
}

/* Brand */
.brand {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.7);
}

/* Centred message */
.panel-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.panel-msg {
  text-align: center;
}
.panel-msg h2 {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: #1a1a1a;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.panel-msg p {
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: 28px;
}
.panel-msg--hidden {
  display: none;
}

/* ════════════════════════════════════════════════════════════
   DARK FORM PANEL
   Also absolutely positioned, same height as the card.
   Register: form on the RIGHT → left: 300px
   Login:    form on the LEFT  → left: 0
   Width fills the remaining space (calc(100% - 300px)).
   ════════════════════════════════════════════════════════════ */
.panel-right {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--panel-w);
  width: calc(100% - var(--panel-w));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 50px;
  background: var(--bg);
  z-index: 1;
  transition: left var(--slide-dur) var(--slide-ease);
}

/* Login: form shifts to the left */
.card.is-login .panel-right {
  left: 0;
}

/* Card needs an explicit height so absolute children have
   something to fill — min-height alone isn't enough */
.card::after {
  content: "";
  display: block;
  min-height: 480px;
}

/* ── Form Wrappers ───────────────────────────────────────── */
.form-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  animation: formFadeIn 0.35s ease both;
  animation-delay: 0.15s;
}
.form-wrap--hidden {
  display: none;
}

@keyframes formFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-wrap h1 {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

/* ── Fields ──────────────────────────────────────────────── */
.field {
  width: 100%;
  margin-bottom: 1.2rem;
  position: relative;
}

.field__icon {
  display: none;
}

.field input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.88rem;
  outline: none;
  transition:
    border-color var(--transition),
    background var(--transition);
}
.field input:focus {
  border-color: var(--accent);
  background: var(--surface-2);
}
.field input::placeholder {
  color: var(--text-subtle);
}

/* ── Field errors ────────────────────────────────────────── */
.field-error {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--error);
  margin-top: 0.3rem;
  letter-spacing: 0.02em;
}

/* ── Forgot link ─────────────────────────────────────────── */
.forgot-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-decoration: none;
  align-self: flex-start;
  margin-bottom: 1rem;
  margin-top: -0.4rem;
  letter-spacing: 0.04em;
  transition: color var(--transition);
}
.forgot-link:hover {
  color: var(--accent);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.68rem 1.8rem;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition:
    background var(--transition),
    color var(--transition),
    transform 0.1s;
}
.btn:active {
  transform: translateY(1px);
}

.btn--outline {
  background: transparent;
  border: 1px solid rgba(0, 0, 0, 0.4);
  color: #1a1a1a;
}
.btn--outline:hover {
  background: rgba(0, 0, 0, 0.08);
}

.btn-main {
  background: var(--accent);
  color: #1a1a1a;
  width: 100%;
  margin-top: 0.4rem;
}
.btn-main:hover {
  background: var(--accent-dim);
}
.btn-main:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Toast ───────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 28px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
  z-index: 999;
  white-space: nowrap;
  pointer-events: none;
}
.toast--success {
  background: var(--success);
  color: #fff;
}
.toast--error {
  background: var(--error);
  color: #fff;
}
.toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE — Tablet (≤ 780px) & Mobile (≤ 480px)
   ══════════════════════════════════════════════════════════ */

@media (max-width: 820px) {
  body {
    padding: 16px;
    padding-top: 68px; /* topbar + breathing room */
    align-items: flex-start;
  }

  /* ── Card becomes single-column ── */
  .card {
    width: 100%;
    min-height: unset;
    border-radius: 2px;
    /* Reset absolute positioning — stack panels vertically */
    display: flex;
    flex-direction: column;
    overflow: visible;
  }

  /* ── Yellow panel sits on top, full width ── */
  .panel-left {
    position: relative;
    top: auto;
    bottom: auto;
    left: auto !important; /* override login/register states */
    width: 100%;
    min-height: 140px;
    padding: 20px 24px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    transition: none;
  }

  /* Keep panel content centred within its new row layout */
  .panel-content {
    flex: 1;
    justify-content: flex-end;
  }

  .panel-msg {
    text-align: right;
  }

  .panel-msg h2 {
    font-size: 1rem;
    margin-bottom: 6px;
  }

  .panel-msg p {
    font-size: 0.72rem;
    margin-bottom: 16px;
  }

  /* ── Dark form panel sits below, full width ── */
  .panel-right {
    position: relative;
    top: auto;
    bottom: auto;
    left: auto !important;
    width: 100%;
    padding: 28px 24px 32px;
    transition: none;
  }

  /* Remove the ::after spacer — no longer needed */
  .card::after {
    display: none;
  }

  /* ── Form layout tightens ── */
  .form-wrap {
    animation: none; /* avoid jarring re-animations on resize */
  }

  .form-wrap h1 {
    font-size: 1.15rem;
    margin-bottom: 6px;
  }

  .field {
    margin-bottom: 1rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 12px;
    padding-top: 64px;
  }

  /* Panel fully stacks */
  .panel-left {
    flex-direction: column;
    align-items: flex-start;
    min-height: 120px;
    padding: 18px 20px;
  }

  .panel-content {
    justify-content: flex-start;
    width: 100%;
    margin-top: 12px;
  }

  .panel-msg {
    text-align: left;
  }

  .panel-right {
    padding: 24px 20px 28px;
  }

  /* Buttons stretch full width */
  .btn--outline {
    width: 100%;
    margin-top: 4px;
  }
}