/* ===== Theme ===== */
:root {
  --bg: #f6f8fc;
  --bg-surface: #ffffff;
  --bg-hover: #f0f4f9;
  --bg-row: #ffffff;
  --bg-row-unread: #f2f6fc;
  --bg-viewer: #ffffff;
  --bg-bottom: #ffffff;
  --text: #001d35;
  --text-secondary: #5e5e5e;
  --text-tertiary: #7b8794;
  --border: #dadce0;
  --border-light: #e8eaed;
  --accent: #1a73e8;
  --accent-hover: #1557b0;
  --dot: #1a73e8;
  --shadow-lg: 0 -4px 24px rgba(0,0,0,0.12);
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --scrollbar: #dadce0;
}
[data-theme="dark"] {
  --bg: #0b0f19;
  --bg-surface: #1a202c;
  --bg-hover: #1f2937;
  --bg-row: #1a202c;
  --bg-row-unread: #1a2332;
  --bg-viewer: #1a202c;
  --bg-bottom: #111827;
  --text: #e8eaed;
  --text-secondary: #9aa0a6;
  --text-tertiary: #6b7280;
  --border: #2d3748;
  --border-light: #374151;
  --accent: #8ab4f8;
  --accent-hover: #aecbfa;
  --dot: #8ab4f8;
  --shadow-lg: 0 -4px 24px rgba(0,0,0,0.4);
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --scrollbar: #374151;
}

/* ===== Reset ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html,body{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.4;}
::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--scrollbar);border-radius:3px;}

/* ===== App Layout ===== */
.app{
  display:flex;
  flex-direction:column;
  height:100vh;
  max-width:800px;
  margin:0 auto;
}

/* ===== Top Bar ===== */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 16px;
  border-bottom:1px solid var(--border-light);
  background:var(--bg-surface);
  flex-shrink:0;
  min-height:56px;
}
.topbar-title{font-size:22px;font-weight:600;letter-spacing:-0.3px;flex-shrink:0;}
.topbar-email{font-size:13px;color:var(--text-tertiary);margin:0 8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0;}
.topbar-right{display:flex;align-items:center;gap:12px;}
.tb-btn{
  background:none;border:none;font-size:24px;cursor:pointer;padding:10px;
  border-radius:50%;color:var(--text-secondary);line-height:1;
  transition:background 0.12s;
}
.tb-btn:hover{background:var(--bg-hover);color:var(--text);}
.tb-count{font-size:13px;color:var(--text-tertiary);min-width:48px;text-align:right;}

/* ===== Filter chips ===== */
.filters{
  display:flex;
  gap:10px;
  padding:10px 16px;
  border-bottom:1px solid var(--border-light);
  background:var(--bg-surface);
  flex-shrink:0;
  overflow-x:auto;
}
.filter-chip{
  padding:8px 18px;
  border:1px solid var(--border);
  border-radius:24px;
  background:none;
  color:var(--text-secondary);
  font-size:14px;
  font-weight:500;
  cursor:pointer;
  white-space:nowrap;
  transition:all 0.12s;
  flex-shrink:0;
}
.filter-chip:hover{background:var(--bg-hover);}
.filter-active{
  background:var(--accent);
  color:#fff;
  border-color:var(--accent);
}
.filter-active:hover{background:var(--accent-hover);}

/* ===== Email List ===== */
.emaillist{
  flex:1;
  overflow-y:auto;
  background:var(--bg-surface);
}

/* ===== Email Row ===== */
.erow{
  display:flex;
  align-items:stretch;
  min-height:68px;
  border-bottom:1px solid var(--border-light);
  cursor:pointer;
  transition:background 0.08s;
}
.erow:hover{background:var(--bg-hover);}
.erow.unread{background:var(--bg-row-unread);}

.ebar{width:4px;flex-shrink:0;background:transparent;}
.erow.unread .ebar{background:var(--dot);}

.econ{
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:10px 12px 10px 12px;
  overflow:hidden;
  gap:3px;
}

.efrom{font-size:15px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4;}
.erow.unread .efrom{font-weight:700;color:var(--text);}
.replied-badge{font-size:13px;color:var(--accent);opacity:0.7;margin-left:3px;}
.thread-count{font-size:13px;color:var(--text-tertiary);margin-left:3px;font-weight:400;}

.esubj{font-size:15px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4;}
.esubj:empty::before{content:"(No subject)";color:var(--text-tertiary);font-style:italic;}
.erow.unread .esubj{font-weight:600;}

.esnip{font-size:14px;color:var(--text-tertiary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4;}

.eright{
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-end;
  padding:10px 10px 10px 4px;
  flex-shrink:0;
  gap:6px;
}
.edate{font-size:12px;color:var(--text-tertiary);white-space:nowrap;}
.eactions{display:flex;gap:4px;}
.ea-btn{
  background:none;border:1px solid var(--border-light);font-size:18px;cursor:pointer;
  padding:8px 10px;border-radius:10px;color:var(--text-secondary);line-height:1;
  transition:background 0.1s,opacity 0.1s;
}
.ea-btn:hover{background:var(--bg-hover);color:var(--text);}
.ea-disabled{opacity:0.25;cursor:default;}
.ea-disabled:hover{background:transparent;color:var(--text-secondary);}
.ea-send-active{color:var(--accent);}
.ea-send-active:hover{background:var(--bg-hover);color:var(--accent-hover);}

/* ===== Inline Draft ===== */
.edraft{
  border-bottom:1px solid var(--border-light);
  background:var(--bg-row-unread);
  padding:12px 16px 14px 20px;
  cursor:default;
}
.edraft-body{
  font-size:14px;
  line-height:1.6;
  color:var(--text-secondary);
  white-space:pre-wrap;
  max-height:120px;
  overflow-y:auto;
  margin-bottom:10px;
}
.edraft-actions{
  display:flex;
  gap:10px;
  justify-content:flex-end;
}
.edraft-btn{
  padding:10px 24px;
  border:none;
  border-radius:20px;
  background:var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:background 0.12s;
}
.edraft-btn:hover{background:var(--accent-hover);}
.edraft-btn:disabled{opacity:0.5;cursor:default;}

/* ===== Load More ===== */
.load-more-area{padding:20px;text-align:center;}
.load-more-btn{
  padding:12px 36px;border:1px solid var(--border);border-radius:24px;
  background:var(--bg-surface);color:var(--text);font-size:14px;font-weight:500;
  cursor:pointer;transition:background 0.12s;
}
.load-more-btn:hover{background:var(--bg-hover);}
.load-more-btn:disabled{opacity:0.5;cursor:default;}

/* ===== Bottom Tabs ===== */
.bottombar{
  display:flex;
  background:var(--bg-bottom);
  border-top:1px solid var(--border-light);
  flex-shrink:0;
}
.tab{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  padding:8px 0 10px;
  border:none;
  background:none;
  color:var(--text-tertiary);
  font-size:12px;
  font-weight:500;
  cursor:pointer;
  transition:color 0.12s;
  position:relative;
}
.tab span{font-size:22px;line-height:1;}
.tab-label{font-size:12px;}
.tab-active{color:var(--accent);}
.tab-badge{
  position:absolute;
  top:4px;
  right:50%;
  transform:translateX(calc(50% + 14px));
  background:var(--accent);
  color:#fff;
  font-size:10px;
  padding:1px 6px;
  border-radius:10px;
  font-weight:600;
  min-width:18px;
  text-align:center;
}

/* ===== States ===== */
.hidden{display:none!important;}
.app-content{display:flex;flex-direction:column;flex:1;min-height:0;}
.loading-state,.empty-state,.error-state{text-align:center;padding:48px 24px;color:var(--text-tertiary);font-size:14px;}
.error-state{color:#d93025;}
[data-theme="dark"] .error-state{color:#f28b82;}

/* ===== Login ===== */
.login-screen{
  position:fixed;inset:0;z-index:999;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg);
}
.login-card{
  background:var(--bg-surface);border-radius:20px;padding:48px 40px 40px;
  width:360px;max-width:90vw;box-shadow:var(--shadow-lg);text-align:center;
}
.login-icon{font-size:48px;margin-bottom:12px;}
.login-title{font-size:22px;font-weight:600;margin-bottom:4px;}
.login-desc{font-size:14px;color:var(--text-tertiary);margin-bottom:28px;}
.login-form{display:flex;flex-direction:column;gap:12px;}
.login-input{
  padding:12px 16px;border:1px solid var(--border);border-radius:12px;
  font-size:18px;text-align:center;letter-spacing:4px;
  background:var(--bg-surface);color:var(--text);outline:none;transition:border-color 0.15s;
}
.login-input:focus{border-color:var(--accent);}
.login-input::placeholder{letter-spacing:0;font-size:14px;color:var(--text-tertiary);}
.login-btn{
  padding:12px;border:none;border-radius:12px;background:var(--accent);
  color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:background 0.12s;
}
.login-btn:hover{background:var(--accent-hover);}
.login-btn:disabled{opacity:0.5;cursor:default;}
.login-error{font-size:13px;color:#d93025;margin-top:12px;min-height:20px;}
[data-theme="dark"] .login-error{color:#f28b82;}

/* ===== Viewer ===== */
.viewer{
  position:fixed;inset:0;z-index:100;
  display:flex;align-items:flex-end;
}
.viewer-backdrop{position:absolute;inset:0;background:rgba(0,0,0,0.5);}
.viewer-content{
  position:relative;z-index:101;width:100%;max-width:800px;margin:0 auto;
  background:var(--bg-viewer);border-radius:20px 20px 0 0;max-height:88vh;
  overflow-y:auto;box-shadow:var(--shadow-lg);
}
.viewer-header{
  display:flex;align-items:center;padding:14px 16px;
  border-bottom:1px solid var(--border);position:sticky;top:0;
  background:var(--bg-viewer);z-index:2;gap:10px;
}
.viewer-header-left{flex:1;display:flex;align-items:center;gap:8px;}
.viewer-header-right{display:flex;gap:8px;}
.vb-btn{
  background:none;border:none;color:var(--text-secondary);font-size:20px;
  cursor:pointer;padding:10px;border-radius:50%;line-height:1;transition:background 0.12s;
}
.vb-btn:hover{background:var(--bg-hover);color:var(--text);}
.vb-btn-primary{
  border-radius:24px;padding:8px 18px;font-size:14px;font-weight:500;
  color:var(--accent);border:1px solid var(--border);background:none;cursor:pointer;
  white-space:nowrap;transition:background 0.12s;
}
.vb-btn-primary:hover{background:var(--bg-hover);}
.vb-btn-primary:disabled{opacity:0.4;cursor:default;}
.viewer-body{padding:20px 20px 32px;}
.viewer-from{font-size:14px;color:var(--text-secondary);margin-bottom:2px;}
.viewer-to{font-size:13px;color:var(--text-tertiary);margin-bottom:8px;}
.viewer-subject{font-size:20px;font-weight:600;margin-bottom:4px;letter-spacing:-0.3px;}
.viewer-date{font-size:12px;color:var(--text-tertiary);margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border);}
.viewer-body-text{font-size:14px;line-height:1.7;white-space:pre-wrap;word-wrap:break-word;}
.viewer-spinner{font-size:14px;color:var(--accent);animation:spin 1s linear infinite;}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

/* ===== Compose ===== */
.compose{
  position:fixed;inset:0;z-index:200;
  display:flex;align-items:flex-end;justify-content:center;
}
.compose-backdrop{position:absolute;inset:0;background:rgba(0,0,0,0.4);}
.compose-window{
  position:relative;z-index:201;width:100%;max-width:680px;max-height:80vh;
  background:var(--bg-surface);border-radius:16px 16px 0 0;
  display:flex;flex-direction:column;box-shadow:var(--shadow-lg);overflow:hidden;
}
.compose-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;border-bottom:1px solid var(--border);
}
.compose-title{font-size:16px;font-weight:600;}
.compose-body{padding:0 16px;overflow-y:auto;flex:1;}
.cf{display:flex;align-items:center;padding:12px 0;border-bottom:1px solid var(--border-light);}
.cf label{width:56px;font-size:14px;color:var(--text-secondary);flex-shrink:0;}
.cf input{flex:1;border:none;background:none;padding:4px 8px;font-size:15px;color:var(--text);outline:none;}
.cf input::placeholder{color:var(--text-tertiary);}
.cf-body{border-bottom:none;flex:1;display:flex;flex-direction:column;align-items:stretch;padding-top:12px;}
.cf-body label{margin-bottom:6px;}
.cf-body textarea{
  flex:1;min-height:180px;max-height:400px;border:none;background:none;
  padding:4px 0;font-size:15px;line-height:1.6;color:var(--text);
  resize:vertical;outline:none;font-family:inherit;
}
.cf-body textarea::placeholder{color:var(--text-tertiary);}
.compose-footer{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;border-top:1px solid var(--border);gap:12px;
}
.compose-status{flex:1;font-size:14px;color:var(--text-tertiary);min-height:22px;}
.compose-status--error{color:#d93025;}
.compose-status--success{color:#188038;}
.compose-status--loading{color:var(--accent);animation:pulse 1.2s ease-in-out infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:0.4;}}
[data-theme="dark"] .compose-status--error{color:#f28b82;}
[data-theme="dark"] .compose-status--success{color:#81c995;}
.compose-actions{display:flex;gap:10px;flex-shrink:0;}
.btn-primary,.btn-secondary,.btn-ghost{
  padding:10px 24px;border-radius:24px;border:none;font-size:14px;font-weight:500;
  cursor:pointer;transition:background 0.12s,opacity 0.12s;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-hover);}
.btn-primary:disabled{opacity:0.5;cursor:default;}
.btn-secondary{background:none;border:1px solid var(--border);color:var(--text-secondary);}
.btn-secondary:hover{background:var(--bg-hover);}
.btn-ghost{
  background:none;border:1px dashed var(--border);color:var(--accent);
}
.btn-ghost:hover{background:var(--bg-hover);border-color:var(--accent);}
.btn-ghost:disabled{opacity:0.5;cursor:default;}

/* ===== Settings ===== */
.compose-window--settings{max-width:600px;}
.settings-section{margin-bottom:20px;}
.settings-theme{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 0;border-bottom:1px solid var(--border-light);
  font-size:14px;font-weight:500;
}
.settings-heading{font-size:14px;font-weight:600;margin-bottom:4px;margin-top:4px;}
.settings-desc{font-size:13px;color:var(--text-tertiary);margin-bottom:10px;line-height:1.5;}
.settings-prompt{
  width:100%;min-height:120px;border:1px solid var(--border-light);border-radius:8px;
  background:none;padding:12px;font-size:13px;line-height:1.6;
  color:var(--text);resize:vertical;outline:none;font-family:inherit;
}
.settings-prompt:focus{border-color:var(--accent);}
.settings-data-actions{display:flex;gap:10px;margin-top:4px;}
.btn-danger{
  padding:10px 24px;border-radius:24px;border:1px solid #d93025;
  background:none;color:#d93025;font-size:14px;font-weight:500;
  cursor:pointer;transition:background 0.12s;
}
.btn-danger:hover{background:#d9302515;}
[data-theme="dark"] .btn-danger{border-color:#f28b82;color:#f28b82;}
[data-theme="dark"] .btn-danger:hover{background:#f28b8215;}