:root{color-scheme:light;--color-bg: #ffffff;--color-bg-elevated: #f4f6f8;--color-fg: #1a1a1a;--color-fg-muted: #55606b;--color-accent: #1a3c6e;--color-accent-fg: #ffffff;--color-border: #d0d7de;--color-danger: #b3261e;--color-unread-marker: #1a3c6e}:root[data-theme=dark]{color-scheme:dark;--color-bg: #14181c;--color-bg-elevated: #1e242a;--color-fg: #e8ebee;--color-fg-muted: #a3aeb8;--color-accent: #6ea0e8;--color-accent-fg: #0b1220;--color-border: #333d47;--color-danger: #ff8a80;--color-unread-marker: #6ea0e8}:root[data-theme=hc-light]{color-scheme:light;--color-bg: #ffffff;--color-bg-elevated: #ffffff;--color-fg: #000000;--color-fg-muted: #000000;--color-accent: #0000cc;--color-accent-fg: #ffffff;--color-border: #000000;--color-danger: #b00000;--color-unread-marker: #0000cc;--border-width-strong: 2px}:root[data-theme=hc-dark]{color-scheme:dark;--color-bg: #000000;--color-bg-elevated: #000000;--color-fg: #ffffff;--color-fg-muted: #ffffff;--color-accent: #ffe066;--color-accent-fg: #000000;--color-border: #ffffff;--color-danger: #ff6b6b;--color-unread-marker: #ffe066;--border-width-strong: 2px}:root{--base-font-size-px: 16;--line-height-scale: 1;--line-height-base: 1.5;--sidebar-font-size-px: 16;--sidebar-line-height-scale: 1}html{font-size:calc(var(--base-font-size-px) * 1px)}body{line-height:calc(var(--line-height-base) * var(--line-height-scale))}.sidebar{font-size:calc(var(--sidebar-font-size-px) * 1px);line-height:calc(var(--line-height-base) * var(--sidebar-line-height-scale))}*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,Hiragino Sans,Yu Gothic,sans-serif;background:var(--color-bg);color:var(--color-fg)}button,input,select,textarea{font:inherit;color:inherit}input,select,textarea{background:var(--color-bg);border:1px solid var(--color-border);border-radius:.25rem;padding:.4rem}a{color:var(--color-accent)}.app-shell{display:flex;min-height:100vh}.sidebar{width:16rem;flex-shrink:0;background:var(--color-bg-elevated);border-right:1px solid var(--color-border);padding:1rem}.main-content{flex:1;padding:1.5rem;min-width:0}.message-list{list-style:none;margin:0;padding:0}.message-row{display:flex;gap:.75rem;align-items:baseline;padding:.75rem;border-bottom:1px solid var(--color-border)}.message-row.unread{font-weight:700;border-left:.25rem solid var(--color-unread-marker)}.field{display:flex;flex-direction:column;gap:.25rem;margin-bottom:1rem}.btn-primary{background:var(--color-accent);color:var(--color-accent-fg);border:1px solid var(--color-accent);border-radius:.25rem;padding:.5rem 1rem;cursor:pointer}.error-text{color:var(--color-danger)}.context-menu{display:flex;flex-direction:column;background:var(--color-bg);color:var(--color-fg);border:1px solid var(--color-border);border-radius:.25rem;box-shadow:0 .25rem .75rem #0000004d;padding:.5rem;min-width:16rem;max-height:80vh;overflow-y:auto;z-index:1000}.menu-item{display:block;width:100%;text-align:left;background:none;border:none;border-radius:.25rem;padding:.5rem;cursor:pointer}.menu-item:hover,.menu-item:focus-visible{background:var(--color-bg-elevated)}