/* ==========================================================================
   CloudMail Webmail — styles.css
   Independent branding (external email provider look)
   ========================================================================== */

:root {
  --primary: #4a3d8f;
  --accent: #6c5ce7;
  --bg-dark: #2d1b69;
  --bg-gradient: linear-gradient(135deg, #1a1040 0%, #4a3d8f 50%, #2d1b69 100%);
  --text: #333;
  --text-light: #666;
  --text-muted: #999;
  --border: #e0e0e0;
  --bg-hover: #f5f7fa;
  --bg-active: #e8f0fe;
  --white: #fff;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --font: 'Inter', sans-serif;
}

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

html, body {
  height: 100%;
  font-family: var(--font);
  color: var(--text);
  background: #f0f2f5;
}

/* ==========================================================================
   LOGIN SCREEN
   ========================================================================== */

.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg-gradient);
  padding: 1rem;
}

.login-card {
  background: var(--white);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-card .logo-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.login-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.login-card .subtitle {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 2rem;
}

.login-card .form-group {
  margin-bottom: 1rem;
  text-align: left;
}

.login-card label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 0.35rem;
}

.login-card input[type="email"],
.login-card input[type="password"] {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.login-card input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(42, 157, 143, 0.15);
}

.login-card .btn-login {
  width: 100%;
  padding: 0.75rem;
  margin-top: 0.75rem;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--white);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.login-card .btn-login:hover {
  background: #238b80;
}

.login-card .btn-login:active {
  transform: scale(0.98);
}

.login-card .login-error {
  color: #c0392b;
  font-size: 0.85rem;
  margin-top: 0.75rem;
  display: none;
}

/* ==========================================================================
   INBOX SCREEN
   ========================================================================== */

.inbox-screen {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.inbox-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--primary);
  color: var(--white);
  padding: 0 1.25rem;
  height: 56px;
  flex-shrink: 0;
}

.inbox-header .header-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1rem;
}

.inbox-header .header-left .logo-icon {
  font-size: 1.3rem;
}

.inbox-header .header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.inbox-header .user-email {
  font-size: 0.85rem;
  opacity: 0.85;
}

.inbox-header .btn-logout {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.inbox-header .btn-logout:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Body layout */
.inbox-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Email list (sidebar) */
.email-list {
  width: 400px;
  min-width: 400px;
  border-right: 1px solid var(--border);
  background: var(--white);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.email-list-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-light);
  flex-shrink: 0;
}

.email-list-items {
  flex: 1;
  overflow-y: auto;
}

.email-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
  transition: background 0.15s;
}

.email-item:hover {
  background: var(--bg-hover);
}

.email-item.active {
  background: var(--bg-active);
  border-left: 3px solid var(--accent);
  padding-left: calc(1rem - 3px);
}

.email-item.unread {
  background: #fafcff;
}

.email-item.unread .email-item-from {
  font-weight: 700;
}

.email-item.unread .email-item-subject {
  font-weight: 600;
  color: var(--text);
}

.email-item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.email-item-from {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 70%;
}

.email-item-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.email-item-subject {
  font-size: 0.82rem;
  color: var(--text-light);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Email viewer */
.email-viewer {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--white);
  overflow: hidden;
}

.email-viewer-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.email-viewer-content {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.email-viewer-content.visible {
  display: flex;
}

.email-viewer-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.email-viewer-subject {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.email-viewer-meta {
  font-size: 0.82rem;
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.email-viewer-body {
  flex: 1;
  overflow: hidden;
  padding: 0;
}

.email-viewer-body iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.email-viewer-body pre {
  padding: 1.5rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: var(--font);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
  overflow-y: auto;
  height: 100%;
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */

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

.email-item.slide-in {
  animation: slideIn 0.35s ease-out;
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.hidden {
  display: none !important;
}