/* Gmail Viewer — optimized, responsive, accessible. */

:root{
  --bg:#f6f7fb;--panel:#fff;--panel-2:#f1f3f8;--text:#15192a;--muted:#6b7280;
  --line:#e5e7eb;--line-2:#eef0f4;--accent:#4f46e5;--accent-2:#6366f1;
  --danger:#dc2626;--danger-bg:#fee2e2;--shadow:0 1px 2px rgba(15,23,42,.04),0 4px 16px rgba(15,23,42,.06);
  --radius:14px;--radius-sm:10px;--sidebar-w:280px;
  --header-h:64px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0b1020;--panel:#121831;--panel-2:#0e1430;--text:#e7e9f3;--muted:#9aa1b2;--line:#1f2547;--line-2:#161b3a;--accent:#7c83ff;--accent-2:#5b6cff;--danger:#f87171;--danger-bg:#3a1b1b;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);}
}

*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
img,svg{display:block;max-width:100%}
.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:8px;top:-40px;z-index:100;background:var(--accent);color:#fff;padding:8px 12px;border-radius:8px;transition:top .15s}
.skip-link:focus{top:8px}

.muted{color:var(--muted)}
.small{font-size:12.5px}

/* ---------- Buttons & inputs ---------- */
button,.ghost,.primary,.icon-btn,.logout{
  cursor:pointer;border:1px solid var(--line);background:var(--panel);
  border-radius:var(--radius-sm);padding:9px 14px;color:var(--text);
  transition:background .15s,border-color .15s,transform .05s,box-shadow .15s;
}
button:hover,.ghost:hover,.icon-btn:hover,.logout:hover{background:var(--panel-2)}
button:active,.ghost:active,.icon-btn:active{transform:translateY(1px)}
button:disabled,.ghost:disabled,.icon-btn:disabled{opacity:.55;cursor:not-allowed}

.primary{background:linear-gradient(180deg,var(--accent-2),var(--accent));border-color:transparent;color:#fff;font-weight:600;box-shadow:0 6px 18px rgba(79,70,229,.25)}
.primary.block{width:100%;padding:11px 14px}

.ghost{background:transparent}
.ghost.small{padding:6px 10px;font-size:13px}
.ghost.disabled{opacity:.5;pointer-events:none}

.icon-btn{display:inline-grid;place-items:center;width:36px;height:36px;padding:0;background:transparent;border:1px solid transparent}
.icon-btn:hover{background:var(--panel-2)}
.ghost.icon{padding:0 12px;display:grid;place-items:center}

input,select,textarea{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 12px;outline:0;width:100%;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,70,229,.15)}

.alert{font-size:14px;border-radius:var(--radius-sm);padding:10px 12px;border:1px solid}
.alert.error{color:var(--danger);background:var(--danger-bg);border-color:color-mix(in srgb,var(--danger) 35%,transparent)}

.only-mobile{display:none}
@media (max-width:880px){.only-mobile{display:inline-grid}}

/* ---------- Auth page ---------- */
.auth-page{min-height:100%;display:grid;place-items:center;padding:clamp(16px,4vw,32px);background:radial-gradient(1000px 600px at 10% -10%,rgba(99,102,241,.18),transparent 60%),radial-gradient(800px 500px at 110% 110%,rgba(56,189,248,.12),transparent 60%),var(--bg)}
.auth-shell{width:100%;max-width:min(420px,92vw)}
.auth-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:clamp(20px,4vw,28px);box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:12px}
.brand.small .brand-name{font-size:15px}
.brand-mark{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;color:#fff;background:linear-gradient(135deg,var(--accent-2),var(--accent));box-shadow:0 6px 18px rgba(79,70,229,.25);flex:0 0 auto}
.brand-name{font-weight:700;font-size:16px;letter-spacing:.1px;margin:0}
.brand-sub{color:var(--muted);font-size:13px;margin:2px 0 0}
.auth-form{margin-top:22px;display:grid;gap:10px}
.auth-form label{font-size:13px;color:var(--muted)}
.input-row{display:flex;gap:8px;align-items:stretch}
.input-row input{flex:1;min-width:0}
.auth-hint{margin-top:18px;font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding-top:14px;border-top:1px dashed var(--line)}
.auth-hint code{background:var(--panel-2);border:1px solid var(--line);border-radius:6px;padding:1px 6px;word-break:break-all}
.footer-note{text-align:center;color:var(--muted);font-size:12.5px;margin:18px 0 0}

/* ---------- App shell ---------- */
.app{display:grid;grid-template-columns:minmax(240px,var(--sidebar-w)) 1fr;min-height:100vh}
@media (max-width:880px){.app{grid-template-columns:1fr}}

.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow-y:auto}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line-2)}
.nav{padding:12px 10px;display:grid;gap:4px}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;color:var(--text)}
.nav-item:hover{background:var(--panel-2)}
.nav-item.active{background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent);font-weight:600}
.nav-item .badge{margin-left:auto;background:var(--panel-2);color:var(--muted);font-size:12px;border-radius:999px;padding:2px 8px;font-weight:500;min-width:24px;text-align:center}
.nav-item.active .badge{background:var(--accent);color:#fff}

.sidebar-section{padding:10px 18px 16px;border-top:1px solid var(--line-2)}
.section-title{font-size:11.5px;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);margin:10px 0 8px;font-weight:600}
.whitelist{display:flex;flex-direction:column;gap:6px}
.wl-chip{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text);background:var(--panel-2);padding:5px 10px;border-radius:999px;border:1px solid var(--line);max-width:100%;overflow:hidden}
.wl-chip .dot{width:8px;height:8px;border-radius:50%;flex:0 0 auto}
.wl-chip .truncate{flex:1;min-width:0}

.sidebar-foot{margin-top:auto;border-top:1px solid var(--line-2);padding:12px 14px;display:flex;align-items:center;gap:10px}
.account{display:flex;align-items:center;gap:10px;flex:1;min-width:0}
.acct-avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:13px;flex:0 0 auto}
.acct-info{min-width:0}
.acct-name{font-size:13px;font-weight:600}
.acct-email{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.logout{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;font-size:13px}
.logout span{white-space:nowrap}

/* Mobile drawer */
@media (max-width:880px){
  .sidebar{position:fixed;top:0;left:0;width:84%;max-width:320px;height:100dvh;z-index:40;transform:translateX(-100%);transition:transform .25s ease;box-shadow:0 0 40px rgba(0,0,0,.25)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:30;opacity:0;pointer-events:none;transition:opacity .2s}
  .sidebar-overlay.open{opacity:1;pointer-events:auto}
  .sidebar-overlay[hidden]{display:block}
  body.no-scroll{overflow:hidden}
}

/* Main */
.main{min-width:0}
.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:10px;padding:12px 18px;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:saturate(140%) blur(8px);-webkit-backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line);min-height:var(--header-h)}
.search{position:relative;display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 10px;flex:1;min-width:0}
.search svg{color:var(--muted);flex:0 0 auto}
.search input{background:transparent;border:0;padding:6px 4px;box-shadow:none}
.search input:focus{box-shadow:none}
.topbar-right{display:flex;gap:6px;align-items:center;flex:0 0 auto}

/* Mail list */
.mail-list{padding:8px 12px 24px;max-width:1000px;margin:0 auto;width:100%}
.mail{display:grid;grid-template-columns:44px 1fr;gap:12px;padding:12px 14px;border-radius:12px;align-items:center;border:1px solid transparent;transition:background .15s,border-color .15s,transform .05s;contain:layout style;will-change:transform}
.mail+.mail{margin-top:4px}
.mail:hover{background:var(--panel);border-color:var(--line)}
.mail:active{transform:scale(.998)}
.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px;letter-spacing:.3px;flex:0 0 auto}
.avatar.lg{width:48px;height:48px;font-size:15px}
.meta{min-width:0;display:grid;gap:2px}
.row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;min-width:0}
.from{font-weight:600;color:var(--text);min-width:0;flex:1}
.when{font-size:12.5px;color:var(--muted);flex:0 0 auto}
.subject{font-weight:500;min-width:0}
.preview{color:var(--muted);font-size:13.5px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;word-break:break-word}
.mail.unseen .from,.mail.unseen .subject{font-weight:700}
@media (min-width:881px){
  .mail{position:relative;padding-left:24px}
  .mail.unseen::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);position:absolute;left:10px;top:50%;transform:translateY(-50%)}
}

@media (max-width:600px){
  .mail{grid-template-columns:38px 1fr;padding:10px 10px}
  .avatar{width:38px;height:38px;font-size:13px}
  .preview{-webkit-line-clamp:2}
  .topbar{padding:10px 12px}
  .mail-list{padding:6px 6px 18px}
}

/* Empty */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty-mark{font-size:42px;margin-bottom:6px}
.empty h3{color:var(--text);margin:0 0 4px}

/* Pager */
.pager{display:flex;align-items:center;justify-content:space-between;padding:14px 18px 28px;max-width:1000px;margin:0 auto;flex-wrap:wrap;gap:10px}
.pager-info{color:var(--muted);font-size:13px}

/* ---------- Reader ---------- */
.reading{background:var(--bg)}
.reader-shell{width:100%;max-width:none;margin:0;padding:0 0 40px}
.reader-top{position:sticky;top:0;z-index:5;display:grid;grid-template-columns:40px 1fr 40px;align-items:center;gap:8px;padding:10px 6px;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:saturate(140%) blur(8px);-webkit-backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}
.reader-title-wrap{min-width:0;text-align:center}
.reader-title{font-weight:600;font-size:16px;margin:0}
.reader{background:var(--panel);border:1px solid var(--line);border-radius:16px;margin:14px 0 0;box-shadow:var(--shadow);overflow:hidden;width:100%;max-width:none}
.reader-header{display:grid;grid-template-columns:48px 1fr;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line-2);align-items:center}
.from-line{display:flex;gap:8px;flex-wrap:wrap;align-items:baseline;min-width:0}
.from-name{font-weight:700;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.from-addr{color:var(--muted);font-size:13px;word-break:break-all}
.reader-body{padding:8px 0 16px;width:100%;display:block}
.mail-frame{width:70% !important;max-width:100%;border:0;background:transparent;min-height:320px;display:block;height:auto;margin:0;padding:0;box-sizing:border-box}
.plain{white-space:pre-wrap;word-break:break-word;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13.5px;margin:0;padding:14px 18px}

@media (max-width:600px){
  .reader-header{grid-template-columns:40px 1fr;padding:12px 14px;gap:10px}
  .reader-top{grid-template-columns:40px 1fr 40px;padding:10px 4px}
  .reader{border-radius:12px}
}

/* Respect reduced motion */
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
}