/* ═══════════════════════════════════════════════════════════════
   FORGE MAIL — Dark Forge Design System
   Fonts: Syne (headings) + DM Mono (inputs/code)
═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Mono:ital,wght@0,300;0,400;0,500;1,400&display=swap');

/* ── Tokens ─────────────────────────────────────────────────── */
:root {
  --bg:            #0a0a0f;
  --surface:       #10101a;
  --surface-2:     #16162a;
  --border:        rgba(0, 229, 255, 0.15);
  --border-hover:  rgba(0, 229, 255, 0.35);
  --cyan:          #00e5ff;
  --cyan-dim:      rgba(0, 229, 255, 0.08);
  --cyan-glow:     rgba(0, 229, 255, 0.25);
  --green:         #39ff14;
  --green-dim:     rgba(57, 255, 20, 0.15);
  --red:           #ff4560;
  --red-dim:       rgba(255, 69, 96, 0.15);
  --text:          #f0ece3;
  --text-muted:    rgba(240, 236, 227, 0.45);
  --text-dim:      rgba(240, 236, 227, 0.25);
  --radius:        12px;
  --radius-lg:     18px;
  --transition:    0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --font-display:  'Syne', sans-serif;
  --font-mono:     'DM Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background-color: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ── Animated Background Grid ───────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(0, 229, 255, 0.04) 39px,
      rgba(0, 229, 255, 0.04) 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 39px,
      rgba(0, 229, 255, 0.04) 39px,
      rgba(0, 229, 255, 0.04) 40px
    );
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse 70% 55% at 50% 40%,
    rgba(0, 229, 255, 0.07) 0%,
    transparent 70%
  );
  animation: pulse-glow 6s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%       { opacity: 1;   transform: scale(1.08); }
}

/* ── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: rgba(0, 229, 255, 0.25); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 229, 255, 0.45); }

/* ── Layout ──────────────────────────────────────────────────── */
.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 20px 80px;
}

.card {
  width: 100%;
  max-width: 680px;
  background: rgba(16, 16, 26, 0.82);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0, 229, 255, 0.04),
    0 32px 80px rgba(0, 0, 0, 0.55),
    0 0 80px rgba(0, 229, 255, 0.04);
}

/* ── Header ──────────────────────────────────────────────────── */
.card-header {
  padding: 32px 36px 28px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.header-left { flex: 1; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--cyan) 0%, #0090ff 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
  flex-shrink: 0;
}

.brand-icon svg { width: 18px; height: 18px; color: #0a0a0f; }

.brand-name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--cyan) 0%, #7b8fff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-tagline {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.status-dot {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: var(--green-dim);
  border: 1px solid rgba(57, 255, 20, 0.2);
  padding: 5px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.status-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--green);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

/* ── Form Body ───────────────────────────────────────────────── */
.card-body {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Floating Label Fields ───────────────────────────────────── */
.field {
  position: relative;
  opacity: 0;
  transform: translateY(18px);
  animation: slide-up 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slide-up {
  to { opacity: 1; transform: translateY(0); }
}

.field:nth-child(1)  { animation-delay: 0.05s; }
.field:nth-child(2)  { animation-delay: 0.13s; }
.field:nth-child(3)  { animation-delay: 0.21s; }
.field:nth-child(4)  { animation-delay: 0.29s; }
.field:nth-child(5)  { animation-delay: 0.37s; }

.field label {
  position: absolute;
  top: 50%;
  left: 16px;
  transform: translateY(-50%);
  font-size: 13px;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--text-muted);
  pointer-events: none;
  transition: all var(--transition);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.field.textarea-field label {
  top: 20px;
  transform: none;
}

.field input,
.field textarea {
  width: 100%;
  background: rgba(0, 229, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 16px 8px;
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  resize: none;
  -webkit-appearance: none;
}

.field textarea {
  min-height: 200px;
  padding-top: 28px;
  line-height: 1.6;
}

.field input:hover,
.field textarea:hover {
  border-color: var(--border-hover);
  background: rgba(0, 229, 255, 0.05);
}

.field input:focus,
.field textarea:focus {
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.06);
  box-shadow:
    0 0 0 3px var(--cyan-glow),
    inset 0 0 20px rgba(0, 229, 255, 0.03);
}

/* Float label when focused or filled */
.field input:focus + label,
.field input:not(:placeholder-shown) + label,
.field textarea:focus + label,
.field textarea:not(:placeholder-shown) + label {
  top: 8px;
  transform: translateY(0);
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.field.textarea-field input:focus + label,
.field.textarea-field textarea:focus + label,
.field.textarea-field textarea:not(:placeholder-shown) + label {
  top: 8px;
}

.field input::placeholder,
.field textarea::placeholder {
  color: transparent;
}

/* ── Field Meta (error + counter) ───────────────────────────── */
.field-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
  min-height: 18px;
}

.field-error {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--red);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.field-error.visible { opacity: 1; }

.field-counter {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-left: auto;
}

.field-counter.warn { color: var(--red); }

/* ── Error shake ─────────────────────────────────────────────── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-6px); }
  40%       { transform: translateX(6px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

.field.invalid input,
.field.invalid textarea {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(255, 69, 96, 0.2);
  animation: shake 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Divider ─────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 4px 0;
  opacity: 0;
  animation: slide-up 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.25s forwards;
}

/* ── Actions Row ─────────────────────────────────────────────── */
.actions {
  display: flex;
  gap: 12px;
  align-items: center;
  opacity: 0;
  animation: slide-up 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.45s forwards;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  border: none;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    background var(--transition),
    color var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn:active { transform: scale(0.97); }
.btn:hover  { transform: scale(1.03); }

.btn-preview {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--border);
}

.btn-preview:hover {
  border-color: var(--cyan);
  background: var(--cyan-dim);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
}

.btn-send {
  background: var(--cyan);
  color: #0a0a0f;
  flex: 1;
  font-weight: 700;
}

.btn-send:hover {
  box-shadow: 0 8px 32px rgba(0, 229, 255, 0.45);
}

.btn-send:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Send button states */
.btn-send.state-loading {
  background: var(--cyan);
  color: #0a0a0f;
}

.btn-send.state-success {
  background: var(--green);
  color: #0a0a0f;
  animation: success-pulse 1.5s ease-in-out 2;
}

.btn-send.state-error {
  background: var(--red);
  color: #fff;
}

@keyframes success-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.4); }
  50%       { box-shadow: 0 0 0 14px rgba(57, 255, 20, 0); }
}

/* ── Spinner ─────────────────────────────────────────────────── */
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(10, 10, 15, 0.3);
  border-top-color: #0a0a0f;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

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

/* ── Preview Section ─────────────────────────────────────────── */
.preview-section {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition:
    max-height var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1),
    opacity var(--transition-slow) ease;
}

.preview-section.open {
  max-height: 1000px;
  opacity: 1;
}

.preview-inner {
  border-top: 1px solid var(--border);
  padding: 28px 36px 32px;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

.preview-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Viewport toggle pill */
.viewport-toggle {
  display: flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.vp-btn {
  background: transparent;
  border: none;
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 12px;
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

.vp-btn.active {
  background: var(--cyan);
  color: #0a0a0f;
  font-weight: 700;
}

/* Preview iframe container */
.preview-frame-wrapper {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  display: flex;
  justify-content: center;
  padding: 20px;
  min-height: 300px;
}

.preview-frame-inner {
  width: 100%;
  max-width: 100%;
  transition: max-width var(--transition-slow) ease;
}

.preview-frame-inner.mobile {
  max-width: 375px;
  box-shadow:
    0 0 0 10px #1a1a2e,
    0 0 0 12px rgba(0, 229, 255, 0.15),
    0 24px 60px rgba(0, 0, 0, 0.6);
  border-radius: 20px;
  overflow: hidden;
}

.preview-iframe {
  width: 100%;
  min-height: 300px;
  border: none;
  display: block;
  background: #fff;
}

.preview-frame-inner:not(.mobile) .preview-iframe {
  border-radius: var(--radius);
}

.preview-note {
  margin-top: 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

/* ── Toast Notification ──────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.toast {
  background: rgba(16, 16, 26, 0.95);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  max-width: 340px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  animation: toast-in 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  will-change: transform, opacity;
}

.toast.toast-exit {
  animation: toast-out 0.35s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

@keyframes toast-out {
  from { opacity: 1; transform: translateX(0)   scale(1); }
  to   { opacity: 0; transform: translateX(40px) scale(0.95); }
}

.toast-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.toast-icon { font-size: 15px; }

.toast-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.toast.success .toast-title { color: var(--green); }
.toast.error   .toast-title { color: var(--red); }
.toast.success { border-color: rgba(57, 255, 20, 0.25); }
.toast.error   { border-color: rgba(255, 69, 96, 0.25); }

.toast-body {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  line-height: 1.5;
  word-break: break-all;
}

.toast-time {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-top: 4px;
}

/* ── Provider Bar ────────────────────────────────────────────── */
.provider-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: slide-up 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.02s forwards;
}

.provider-label {
  font-size: 11px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  flex-shrink: 0;
}

.provider-tabs {
  display: flex;
  background: rgba(0, 229, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 3px;
}

.prov-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  border-radius: 999px;
  border: none;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

.prov-btn svg { width: 13px; height: 13px; }

.prov-btn:hover:not(.active) {
  color: var(--text);
  background: rgba(0, 229, 255, 0.06);
}

.prov-btn.active {
  background: var(--cyan);
  color: #0a0a0f;
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.35);
}

/* ── Field Hint ──────────────────────────────────────────────── */
.field-hint {
  font-size: 10.5px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  margin-left: auto;
  text-align: right;
  font-style: italic;
}

.field-hint em {
  font-style: normal;
  color: rgba(0, 229, 255, 0.55);
}

/* When there's also an error, hint yields space */
.field-error.visible ~ .field-hint { display: none; }

/* ── Gmail Credentials Panel ─────────────────────────────────── */
.gmail-creds {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    max-height 0.38s cubic-bezier(0.4, 0, 0.2, 1),
    opacity    0.28s ease,
    transform  0.28s ease;
}

.gmail-creds.open {
  max-height: 300px;
  opacity: 1;
  transform: translateY(0);
}

/* ── OAuth UI ────────────────────────────────────────────────── */
.oauth-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: rgba(0, 229, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.gmail-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
}

.gmail-status i {
  color: var(--cyan);
  width: 16px;
  height: 16px;
}

.oauth-actions {
  display: flex;
  gap: 12px;
}

.btn-oauth {
  background: #fff;
  color: #3c4043;
  font-weight: 500;
  border: 1px solid #dadce0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0;
}

.btn-oauth:hover {
  background: #f8f9fa;
  box-shadow: 0 1px 2px 0 rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15);
  transform: none;
}

.btn-oauth:active {
  background: #e8eaed;
  transform: none;
}

.btn-logout {
  background: rgba(255, 69, 96, 0.1);
  color: var(--red);
  border-color: rgba(255, 69, 96, 0.3);
}

.btn-logout:hover {
  background: rgba(255, 69, 96, 0.2);
  box-shadow: none;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  .page-wrapper { padding: 24px 12px 60px; }
  .card-header  { padding: 24px 20px 20px; }
  .card-body    { padding: 24px 20px; }
  .preview-inner { padding: 20px 20px 24px; }
  .actions      { flex-direction: column; }
  .btn-send     { width: 100%; }
  #toast-container { right: 12px; bottom: 16px; left: 12px; }
  .toast        { max-width: 100%; }
  .provider-bar { flex-wrap: wrap; }
  .field-hint   { font-size: 10px; }
  .oauth-actions { flex-direction: column; }
}