:root {
    --navy: #0b1f33;
    --navy-soft: #173b58;
    --magenta: #9b268f;
    --magenta-dark: #78186f;
    --surface: #f4f7f9;
    --line: #dce5eb;
    --ink: #172b3d;
    --muted: #6a7c89;
    --white: #fff;
    --danger: #bd2d3c;
    --success: #16734c;
    --shadow: 0 20px 55px rgba(11, 31, 51, .1);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--surface); }
body { min-height: 100vh; margin: 0; color: var(--ink); background: var(--surface); font-family: Pretendard, "Noto Sans KR", "Malgun Gothic", sans-serif; }
button, input, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

.isri-login-shell { display: grid; min-height: 100vh; place-items: center; padding: 32px 18px; background: radial-gradient(circle at 12% 15%, rgba(155,38,143,.17), transparent 27%), radial-gradient(circle at 90% 85%, rgba(41,118,157,.18), transparent 30%), linear-gradient(135deg, #081a2b, #123d5a); }
.isri-login-card { width: min(100%, 460px); padding: 44px; border: 1px solid rgba(255,255,255,.65); border-radius: 26px; background: rgba(255,255,255,.97); box-shadow: 0 30px 90px rgba(2,15,26,.34); }
.isri-manage-brand { display: flex; align-items: center; gap: 14px; }
.isri-manage-brand img { display: block; width: 230px; max-width: 100%; }
.isri-manage-brand span { color: #526774; font-size: 13px; font-weight: 800; letter-spacing: -.02em; white-space: nowrap; }
.isri-manage-eyebrow { margin: 36px 0 9px; color: var(--magenta); font-size: 11px; font-weight: 900; letter-spacing: .16em; }
.isri-login-card h1 { margin: 0; font-size: 34px; letter-spacing: -.055em; }
.isri-login-description { margin: 12px 0 28px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.isri-login-form { display: grid; gap: 17px; }
.isri-login-form label, .isri-field { display: grid; gap: 8px; }
.isri-login-form label span, .isri-field > span { color: #435866; font-size: 13px; font-weight: 800; }
.isri-login-form input, .isri-field input, .isri-field textarea { width: 100%; border: 1px solid #cbd8e0; border-radius: 11px; color: var(--ink); background: #fff; outline: none; transition: border-color 160ms ease, box-shadow 160ms ease; }
.isri-login-form input, .isri-field input { height: 48px; padding: 0 14px; }
.isri-field textarea { min-height: 310px; padding: 14px; resize: vertical; line-height: 1.75; }
.isri-login-form input:focus, .isri-field input:focus, .isri-field textarea:focus { border-color: var(--magenta); box-shadow: 0 0 0 3px rgba(155,38,143,.11); }
.isri-login-form button { min-height: 50px; margin-top: 5px; border: 0; border-radius: 11px; color: #fff; background: linear-gradient(135deg, var(--magenta), var(--magenta-dark)); font-weight: 800; box-shadow: 0 12px 26px rgba(123,24,111,.23); }
.isri-login-back { display: inline-block; margin-top: 24px; color: #647684; font-size: 13px; }

.isri-manage-layout { min-height: 100vh; }
.isri-manage-header { position: sticky; z-index: 10; top: 0; display: flex; min-height: 78px; align-items: center; justify-content: space-between; padding: 0 34px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.95); backdrop-filter: blur(14px); }
.isri-manage-header .isri-manage-brand img { width: 205px; }
.isri-manage-account { display: flex; align-items: center; gap: 16px; color: var(--muted); font-size: 13px; }
.isri-manage-account > span { color: var(--ink); font-weight: 800; }
.isri-manage-account a { font-weight: 700; }
.isri-manage-account form { margin: 0; }
.isri-manage-account button { min-height: 36px; padding: 0 13px; border: 1px solid var(--line); border-radius: 9px; color: #415662; background: #fff; font-weight: 700; }
.isri-manage-body { display: grid; grid-template-columns: 250px minmax(0, 1fr); min-height: calc(100vh - 78px); }
.isri-manage-sidebar { padding: 34px 24px; color: #c3d0d8; background: var(--navy); }
.isri-manage-sidebar > p { margin: 0 12px 18px; color: #698294; font-size: 10px; font-weight: 900; letter-spacing: .16em; }
.isri-manage-sidebar nav { display: grid; gap: 6px; }
.isri-manage-sidebar a { display: flex; min-height: 52px; align-items: center; justify-content: space-between; padding: 0 14px; border-radius: 11px; font-size: 14px; font-weight: 700; }
.isri-manage-sidebar a:hover { background: rgba(255,255,255,.06); }
.isri-manage-sidebar a.is-active { color: #fff; background: linear-gradient(135deg, rgba(155,38,143,.94), rgba(116,27,106,.94)); box-shadow: 0 10px 24px rgba(0,0,0,.17); }
.isri-manage-sidebar b { display: grid; min-width: 28px; height: 24px; place-items: center; padding: 0 7px; border-radius: 99px; background: rgba(255,255,255,.11); font-size: 11px; }
.isri-manage-content { width: min(100%, 1250px); padding: 42px clamp(24px, 4vw, 58px) 70px; }
.isri-manage-titlebar { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.isri-manage-titlebar p { margin: 0 0 7px; color: var(--magenta); font-size: 10px; font-weight: 900; letter-spacing: .15em; }
.isri-manage-titlebar h1 { margin: 0; font-size: clamp(27px, 3vw, 38px); letter-spacing: -.055em; }

.isri-button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 0 18px; border: 0; border-radius: 10px; font-size: 13px; font-weight: 800; }
.isri-button.is-primary { color: #fff; background: var(--magenta); box-shadow: 0 9px 20px rgba(155,38,143,.18); }
.isri-button.is-secondary { border: 1px solid var(--line); color: #465a67; background: #fff; }
.isri-manage-alert { margin-bottom: 20px; padding: 14px 17px; border: 1px solid; border-radius: 11px; font-size: 13px; font-weight: 700; }
.isri-manage-alert.is-success { border-color: #a8d8c2; color: var(--success); background: #effaf5; }
.isri-manage-alert.is-error { border-color: #efbbc1; color: var(--danger); background: #fff3f4; }

.isri-post-list-card, .isri-editor-card { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow); }
.isri-post-list-head, .isri-post-list-row { display: grid; grid-template-columns: minmax(0, 1fr) 120px 70px 130px; gap: 18px; align-items: center; }
.isri-post-list-head { min-height: 48px; padding: 0 22px; color: #71838f; background: #f8fafb; font-size: 11px; font-weight: 800; }
.isri-post-list-row { min-height: 66px; padding: 10px 22px; border-top: 1px solid #e8eef2; color: #61737f; font-size: 12px; }
.isri-post-subject { overflow: hidden; color: var(--ink); font-size: 14px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
.isri-post-subject:hover { color: var(--magenta); }
.isri-row-actions { display: flex; align-items: center; gap: 8px; }
.isri-row-actions a, .isri-row-actions button { display: inline-flex; min-height: 33px; align-items: center; justify-content: center; padding: 0 10px; border: 1px solid var(--line); border-radius: 7px; background: #fff; font-size: 11px; font-weight: 800; }
.isri-row-actions button { color: var(--danger); }
.isri-row-actions form { margin: 0; }
.isri-manage-empty { padding: 72px 20px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; }

.isri-editor-card { display: grid; gap: 24px; padding: clamp(24px, 4vw, 40px); }
.isri-field b { margin-left: 5px; color: var(--magenta); font-size: 10px; }
.isri-field small { color: #7a8c98; font-size: 11px; }
.isri-field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.isri-check-field { display: flex; align-items: center; gap: 9px; width: fit-content; color: #425866; font-size: 13px; font-weight: 700; }
.isri-check-field input { width: 17px; height: 17px; accent-color: var(--magenta); }
.isri-file-field input { height: auto; padding: 12px; }
.isri-current-file { display: flex; align-items: center; gap: 14px; padding: 15px 17px; border: 1px solid var(--line); border-radius: 11px; background: #f8fafb; font-size: 12px; }
.isri-current-file > span { color: var(--muted); }
.isri-current-file strong { overflow: hidden; margin-right: auto; text-overflow: ellipsis; white-space: nowrap; }
.isri-current-file label { color: var(--danger); font-weight: 700; white-space: nowrap; }
.isri-editor-actions { display: flex; justify-content: flex-end; gap: 10px; padding-top: 5px; }

@media (max-width: 900px) {
    .isri-manage-header { padding: 0 20px; }
    .isri-manage-brand span, .isri-manage-account > span { display: none; }
    .isri-manage-body { display: block; }
    .isri-manage-sidebar { padding: 12px 18px; }
    .isri-manage-sidebar > p { display: none; }
    .isri-manage-sidebar nav { grid-template-columns: repeat(3, 1fr); }
    .isri-manage-sidebar a { min-height: 44px; padding: 0 11px; font-size: 12px; }
    .isri-manage-content { padding-top: 30px; }
}

@media (max-width: 680px) {
    .isri-login-card { padding: 32px 24px; border-radius: 20px; }
    .isri-login-card h1 { font-size: 29px; }
    .isri-manage-header { min-height: 68px; padding: 0 14px; }
    .isri-manage-header .isri-manage-brand img { width: 145px; }
    .isri-manage-account { gap: 8px; }
    .isri-manage-account a { display: none; }
    .isri-manage-sidebar nav { gap: 4px; }
    .isri-manage-sidebar a { justify-content: center; padding: 0 8px; text-align: center; }
    .isri-manage-sidebar b { display: none; }
    .isri-manage-content { padding: 26px 15px 50px; }
    .isri-manage-titlebar { align-items: start; flex-direction: column; }
    .isri-post-list-head { display: none; }
    .isri-post-list-row { grid-template-columns: minmax(0, 1fr) auto; gap: 8px; padding: 15px; }
    .isri-post-list-row > time, .isri-post-list-row > span { display: none; }
    .isri-row-actions { justify-content: end; }
    .isri-field-grid { grid-template-columns: 1fr; }
    .isri-current-file { align-items: flex-start; flex-direction: column; }
    .isri-current-file strong { width: 100%; }
    .isri-editor-actions .isri-button { flex: 1; }
}