:root{
  --bg:#fffafa;--surface:#fff;--ink:#1f1a1b;--muted:#6f6668;--line:#f0e4e5;
  --primary:#d6455d;--primary-ink:#fff;--primary-soft:#fff0f2;--gold:#d4a24c;
  --grad:linear-gradient(120deg,#d6455d,#ef7d8d);
  --ok:#2f7d5b;--ok-soft:#e6f3ec;--warn:#a5660f;--warn-soft:#fbf0dc;--danger:#b3261e;
  --radius:16px;--shadow:0 1px 2px rgba(120,40,50,.04),0 10px 28px rgba(120,40,50,.07);
  /* cùng bộ chữ với trang chủ: chữ đậm Be Vietnam Pro, điểm nhấn viết tay Dancing Script */
  --serif:'Be Vietnam Pro',system-ui,sans-serif;--sans:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;--script:'Dancing Script',cursive;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.55}
a{color:var(--primary)}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{line-height:1.2}
.wrap{max-width:1272px;margin:0 auto;padding:0 16px} /* khung 1240px như trang chủ */

/* thanh trên: thanh trắng bo góc nổi như trang chủ, nút màu "Thiệp của tôi" + mũi tên mở menu tài khoản */
.script{font-family:var(--script);font-weight:700;color:var(--primary)}
.topbar{position:sticky;top:0;z-index:30;padding:10px 0 8px;background:var(--bg)} /* nền đặc: nội dung cuộn bên dưới không lộ ra quanh thanh trên */
.topbar .wrap{display:flex;align-items:center;gap:10px;height:58px;padding:0 10px 0 22px;border-radius:999px;background:rgba(255,255,255,.6);backdrop-filter:blur(16px) saturate(1.6);-webkit-backdrop-filter:blur(16px) saturate(1.6);border:1px solid rgba(255,255,255,.55);box-shadow:0 10px 30px rgba(120,40,50,.1),inset 0 1px 0 rgba(255,255,255,.7)}
.logo{display:flex;align-items:center;gap:0;text-decoration:none;white-space:nowrap;line-height:1}
.logo .lw{position:relative;top:-2px;font:700 30px/1 var(--script);letter-spacing:.01em;text-transform:none;background:linear-gradient(135deg,#d6455d,#ef7d8d);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo .lh{flex:none;width:15px;height:14px;margin:-16px 0 0 -4px;fill:#ef7d8d} /* tim nhỏ như dấu chấm cuối "cưới nha ♥" */
[data-theme="dark"] .logo .lw{background-image:linear-gradient(135deg,#ff9aa9,#ef7d8d)}
/* 3 mục phẳng bên trái như trang chủ; nút sáng/tối và "Tài khoản" bên phải */
.nav{flex:1;display:flex;align-items:center;gap:20px;margin-left:12px}
.nav>a{padding:6px 0;text-decoration:none;color:var(--muted);font-size:14px;font-weight:500;white-space:nowrap;transition:color .2s}
.nav>a:hover,.nav>a.on{color:var(--ink)}
.nav>a.on{font-weight:600}
.nav .theme-btn{margin-left:auto;width:36px;height:36px;border:0;background:none;color:var(--muted)}
.nav .theme-btn:hover{color:var(--ink)}
.acct{position:relative;display:flex;margin-left:6px;border-radius:999px;background:var(--grad);box-shadow:0 8px 20px rgba(214,69,93,.28)}
.acct>a{display:block;line-height:20px;padding:8px 12px 8px 16px;color:#fff;font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap;border-radius:999px 0 0 999px}
.acct>button{width:32px;padding:0 4px 0 0;border:0;border-left:1px solid rgba(255,255,255,.35);border-radius:0 999px 999px 0;background:none;cursor:pointer;display:grid;place-items:center}
.acct>button::before{content:"";width:6px;height:6px;border-right:1.6px solid #fff;border-bottom:1.6px solid #fff;transform:translateY(-2px) rotate(45deg);transition:transform .2s}
.acct.open>button::before{transform:translateY(1px) rotate(225deg)}
.acct>a:hover,.acct>button:hover{background:rgba(255,255,255,.12)}
.acct-menu{position:absolute;right:0;top:calc(100% + 10px);min-width:220px;padding:8px;border-radius:14px;background:var(--surface);box-shadow:0 20px 50px rgba(120,40,50,.18);opacity:0;visibility:hidden;transform:translateY(-6px);transition:.2s;z-index:40}
.acct.open .acct-menu{opacity:1;visibility:visible;transform:none}
.acct-menu .who{padding:8px 10px 10px;margin-bottom:4px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.acct-menu .who b{display:block;color:var(--ink);font-size:14px}
.acct-menu a{display:block;padding:9px 10px;border-radius:10px;font-size:14px;color:var(--ink);text-decoration:none}
.acct-menu a:hover{background:var(--primary-soft)}
@media (max-width:720px){.nav .hide-sm{display:none}}
@media (max-width:480px){.topbar .wrap{padding-left:12px}.logo .lw{font-size:26px}.nav>a{padding:6px 8px;font-size:13px}.acct>a{padding:7px 10px 7px 13px;font-size:13px}.hide-xs{display:none}}

/* nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:999px;border:1px solid transparent;background:var(--grad) border-box;color:var(--primary-ink);font-weight:600;font-size:14px;text-decoration:none;cursor:pointer;transition:filter .15s,transform .1s;white-space:nowrap}
.btn:hover{filter:brightness(1.08)}
.btn:active{transform:scale(.98)}
.btn[disabled]{opacity:.55;pointer-events:none}
.btn.ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn.soft{background:var(--primary-soft);border-color:transparent;color:var(--primary)}
.btn.plain{background:transparent;border-color:var(--line);color:var(--ink)}
.btn.lg{padding:14px 26px;font-size:16px}
.btn.sm{padding:6px 12px;font-size:13px}
.btn.block{width:100%}
.btn.danger{color:var(--danger);border-color:var(--line);background:transparent}

/* thẻ, ô nhập */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.field{display:grid;gap:6px;margin-bottom:14px;align-content:start;min-width:0}
.field>span{font-size:13px;font-weight:600;color:var(--ink)}
.field small{color:var(--muted);font-size:12px}
.input,.field input:not([type=checkbox]):not([type=radio]):not([type=color]):not([type=range]),.field select,.field textarea{width:100%;min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);font:inherit;font-size:15px;line-height:1.4;outline:none;transition:border-color .15s,box-shadow .15s}
/* ô ngày, ô chọn: cùng cao, cùng kiểu chữ với ô chữ (Safari/Chrome mặc định vẽ to nhỏ khác nhau) */
.field input[type=date],.field input[type=time],.input[type=date]{-webkit-appearance:none;appearance:none;min-width:0;display:block}
.field input[type=date]::-webkit-date-and-time-value{text-align:left}
.field select,select.input{-webkit-appearance:none;appearance:none;padding-right:38px;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236f6668' stroke-width='2.2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") right 12px center/16px no-repeat}
/* ô gõ có gợi ý (datalist): dùng chung mũi tên với ô chọn, ẩn mũi tên mặc định nhưng vẫn bấm mở được */
.field input[list]{padding-right:38px;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236f6668' stroke-width='2.2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") right 12px center/16px no-repeat}
.field input[list]::-webkit-calendar-picker-indicator{opacity:0;cursor:pointer}
.field input::placeholder,.field textarea::placeholder,.input::placeholder{color:#b3a7a9}
.field input:focus,.field select:focus,.field textarea:focus,.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}
.field textarea{resize:vertical;min-height:80px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}
@media (max-width:560px){.grid2{grid-template-columns:1fr}}
.check{display:flex;align-items:center;gap:8px;font-size:14px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--primary)}

.chip{display:inline-flex;align-items:center;gap:5px;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600;background:#f1ece6;color:var(--muted)}
.chip.ok{background:var(--ok-soft);color:var(--ok)}
.chip.warn{background:var(--warn-soft);color:var(--warn)}
.chip.red{background:var(--primary-soft);color:var(--primary)}
.muted{color:var(--muted)}
.err{color:var(--danger);font-size:14px;min-height:1.2em;margin:6px 0 0}

/* modal */
.modal{position:fixed;inset:0;z-index:80;background:rgba(30,20,24,.45);display:grid;place-items:center;padding:16px;animation:fade .2s}
.modal[hidden]{display:none}
.modal-box{background:var(--surface);border-radius:20px;width:min(520px,100%);max-height:92vh;overflow:auto;padding:24px;position:relative;box-shadow:0 30px 80px rgba(0,0,0,.25)}
.modal-x{position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:50%;border:0;background:var(--primary-soft);color:var(--primary);cursor:pointer;font-size:20px;line-height:1}
.modal h2{margin:0 0 4px;font-family:var(--serif);font-weight:800;letter-spacing:-.01em;padding-right:40px}
@keyframes fade{from{opacity:0}}

.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:#2e2226;color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;opacity:0;transition:.25s;pointer-events:none;z-index:99;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.bad{background:var(--danger)}

/* tab */
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--line)}
.tabs::-webkit-scrollbar{display:none}
.tab{padding:12px 14px;border:0;background:none;border-bottom:2px solid transparent;cursor:pointer;font-weight:600;font-size:14px;color:var(--muted);white-space:nowrap}
.tab.on{color:var(--primary);border-color:var(--primary)}

table.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.empty{padding:36px 16px;text-align:center;color:var(--muted)}
.skeleton{background:linear-gradient(90deg,#f1ebe4,#f8f3ee,#f1ebe4);background-size:200% 100%;animation:sk 1.2s infinite;border-radius:var(--radius)}
@keyframes sk{to{background-position:-200% 0}}

/* nút đổi nền sáng / tối (theme.js dựng) */
.theme-btn{flex:none;width:40px;height:40px;padding:0;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;transition:transform .25s}
.theme-btn:hover{transform:rotate(-18deg)}
.theme-btn .i-sun,[data-theme="dark"] .theme-btn .i-moon{display:none}
[data-theme="dark"] .theme-btn .i-sun{display:block}

/* ===== nền tối ===== */
:root[data-theme="dark"]{--bg:#141012;--surface:#1f191b;--ink:#f5ece6;--muted:#b3a5a0;--line:#342a2d;--primary:#f0687b;--primary-soft:#3a1f26;--ok-soft:#1f3328;--warn-soft:#3a3020;--shadow:0 1px 2px rgba(0,0,0,.3),0 10px 28px rgba(0,0,0,.35);color-scheme:dark}
[data-theme="dark"] .topbar .wrap{background:rgba(18,13,14,.42);border-color:rgba(255,255,255,.14);box-shadow:0 10px 30px rgba(0,0,0,.3),inset 0 1px 0 rgba(255,255,255,.06);backdrop-filter:blur(18px) saturate(1.5);-webkit-backdrop-filter:blur(18px) saturate(1.5)}
[data-theme="dark"] .chip{background:#2a2124}
[data-theme="dark"] .skeleton{background:linear-gradient(90deg,#221b1e,#2a2124,#221b1e);background-size:200% 100%}
[data-theme="dark"] .field input::placeholder,[data-theme="dark"] .field textarea::placeholder,[data-theme="dark"] .input::placeholder{color:#7d7073}

/* điện thoại: thanh trên vừa một hàng — ẩn chữ logo, nút sáng/tối chuyển vào menu tài khoản */
.acct-menu .theme-item{display:none}
@media (max-width:600px){
  .topbar .wrap{gap:6px;padding:0 6px 0 14px}
  .topbar .logo .lw{display:none}
  .topbar .logo .lh{width:24px;height:22px;margin:0} /* chỉ còn tim làm biểu tượng */
  .nav{gap:14px;margin-left:6px}
  .nav>a{font-size:13px;padding:6px 0}
  .nav .theme-btn{display:none}
  .nav .acct{margin-left:auto}
  .acct-menu .theme-item{display:block}
}
.show-xs{display:none}
@media (max-width:480px){.show-xs{display:inline}} /* điện thoại: nút màu ghi "Của tôi" cho khỏi trùng mục "Thiệp" */