/* NajeonAAS Login — Digital Twin × AI 컨셉, 테마 변수 사용, 반응형 */

.aas-body.aas-blank {
    display: block;
    min-height: 100vh;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(31, 111, 235, 0.18), transparent 60%),
        radial-gradient(ellipse at 80% 80%, rgba(247, 140, 31, 0.13), transparent 60%),
        var(--aas-bg);
    overflow-x: hidden;
    transition: background-color 0.2s;
}
:root[data-theme="light"] .aas-body.aas-blank {
    background:
        radial-gradient(ellipse at 20% 30%, rgba(31, 111, 235, 0.08), transparent 60%),
        radial-gradient(ellipse at 80% 80%, rgba(247, 140, 31, 0.10), transparent 60%),
        linear-gradient(135deg, #f6f8fa 0%, #eef1f5 100%);
}

.login-stage {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
    min-height: 100vh;
    align-items: stretch;
}

/* ─── 좌측 비주얼 ─── */
.login-visual {
    position: relative;
    overflow: hidden;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: var(--aas-text);
}
.visual-bg { position: absolute; inset: 0; z-index: 0; }
.visual-bg .grid-bg, .visual-bg .network {
    position: absolute; inset: 0; width: 100%; height: 100%;
}
.visual-bg .network { opacity: 0.9; }
:root[data-theme="light"] .visual-bg .network { opacity: 0.7; }

.node-ring {
    fill: none;
    stroke-width: 1;
    transform-origin: center;
    transform-box: fill-box;
    animation: pulse-ring 2.6s ease-in-out infinite;
}
.node-core { stroke: var(--aas-accent-2); stroke-opacity: 0.6; }
.node-warn { stroke: var(--aas-accent); stroke-opacity: 0.6; animation-duration: 1.8s; }
.node-ok   { stroke: var(--aas-ok); stroke-opacity: 0.6; animation-duration: 3.2s; }
@keyframes pulse-ring {
    0%, 100% { transform: scale(1); opacity: 0.55; }
    50% { transform: scale(1.35); opacity: 0; }
}

.visual-overlay {
    position: relative;
    z-index: 2;
    max-width: 560px;
}
.brand-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    background: var(--aas-code-bg);
    border: 1px solid rgba(247, 140, 31, 0.3);
    border-radius: 999px;
    font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em;
    color: var(--aas-accent);
    margin-bottom: 2rem;
}
.brand-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--aas-accent);
    box-shadow: 0 0 12px var(--aas-accent);
    animation: blink 1.4s ease-in-out infinite;
}
.brand-badge-logo {
    position: relative;
    display: inline-block;
    width: 20px; height: 20px;
    flex-shrink: 0;
}
.brand-badge-logo img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: contain;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

.visual-title {
    font-size: clamp(1.6rem, 4vw, 3rem);
    line-height: 1.15;
    font-weight: 800;
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
    color: var(--aas-text);
}
.visual-title .t-accent {
    background: linear-gradient(135deg, var(--aas-accent) 0%, #ffb04a 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.visual-sub {
    color: var(--aas-muted);
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    line-height: 1.6;
    margin: 0 0 2.5rem;
    max-width: 480px;
}

.visual-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    max-width: 480px;
}
.stat {
    background: var(--aas-panel);
    border: 1px solid var(--aas-border-2);
    border-radius: 10px;
    padding: 1rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
:root[data-theme="dark"] .stat,
:root:not([data-theme]) .stat {
    background: rgba(255, 255, 255, 0.04);
}
.stat-num {
    font-size: 1.6rem; font-weight: 800; color: var(--aas-accent);
    display: inline-block;
}
.stat-unit { font-size: 0.85rem; color: var(--aas-muted); margin-left: 0.15rem; }
.stat-label { display: block; font-size: 0.75rem; color: var(--aas-muted); margin-top: 0.25rem; letter-spacing: 0.04em; }

/* ─── 우측 폼 ─── */
.login-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--aas-panel);
    border: 1px solid var(--aas-border);
    border-radius: 16px;
    padding: 2.25rem 2rem;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: var(--aas-shadow-lg);
    animation: card-in 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}
:root[data-theme="dark"] .login-card,
:root:not([data-theme]) .login-card {
    background: rgba(22, 27, 34, 0.75);
}
@keyframes card-in {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.card-head { text-align: center; margin-bottom: 1.5rem; }
.logo-mark {
    display: inline-flex;
    margin-bottom: 0.65rem;
    padding: 0.55rem;
    background: var(--aas-elev);
    border-radius: 16px;
    border: 1px solid var(--aas-border-2);
}
.logo-mark-img {
    position: relative;
    display: inline-block;
    width: 64px; height: 64px;
}
.logo-mark-img img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: contain;
}
.card-head h2 {
    margin: 0;
    font-size: 1.5rem; font-weight: 800;
    background: linear-gradient(135deg, var(--aas-accent), #ffb04a);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.01em;
}
.card-sub { color: var(--aas-muted); font-size: 0.85rem; margin: 0.25rem 0 0; }

.alert {
    display: flex; align-items: center; gap: 0.5rem;
    background: rgba(255, 61, 61, 0.1);
    border: 1px solid rgba(255, 61, 61, 0.3);
    color: var(--aas-crit);
    padding: 0.6rem 0.85rem;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.field { display: block; margin-bottom: 0.9rem; }
.field > span {
    display: block;
    font-size: 0.75rem; font-weight: 600; color: var(--aas-muted);
    margin-bottom: 0.3rem;
    letter-spacing: 0.04em; text-transform: uppercase;
}
.field input, .field select {
    width: 100%;
    padding: 0.65rem 0.8rem;
    background: var(--aas-input-bg);
    border: 1px solid var(--aas-border);
    color: var(--aas-text);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
    font-family: inherit;
}
.field input::placeholder { color: var(--aas-muted); opacity: 0.6; }
.field input:focus, .field select:focus {
    outline: none;
    border-color: var(--aas-accent);
    background: var(--aas-input-bg-focus);
    box-shadow: 0 0 0 3px rgba(247, 140, 31, 0.15);
}

.btn-primary {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.8rem;
    background: linear-gradient(135deg, var(--aas-accent), #e07c10);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem; font-weight: 700;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    transition: transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 4px 14px rgba(247, 140, 31, 0.35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(247, 140, 31, 0.5); }
.btn-primary:active { transform: translateY(0); }

.card-foot {
    margin: 1.25rem 0 0;
    text-align: center;
    font-size: 0.75rem; color: var(--aas-muted);
    display: flex; align-items: center; justify-content: center; gap: 0.5rem;
}
.card-foot .dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; }
.card-foot .dot.ok { background: var(--aas-ok); box-shadow: 0 0 6px var(--aas-ok); }
.card-foot .sep { opacity: 0.5; }

/* 우측 상단 테마 토글 */
.login-theme-toggle {
    position: absolute; top: 1rem; right: 1rem; z-index: 10;
}

/* ─── 반응형 ─── */
@media (max-width: 1024px) {
    .login-stage { grid-template-columns: 1fr; }
    .login-visual { min-height: 320px; padding: 2rem; padding-bottom: 1.5rem; }
    .visual-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; }
    .login-panel { padding: 1.5rem 1rem 3rem; }
}
@media (max-width: 640px) {
    .login-visual { padding: 1.25rem; min-height: 260px; }
    .brand-badge { margin-bottom: 1rem; font-size: 0.7rem; }
    .visual-sub { margin-bottom: 1.5rem; }
    .visual-stats { gap: 0.5rem; }
    .stat { padding: 0.65rem; }
    .stat-num { font-size: 1.2rem; }
    .login-card { padding: 1.75rem 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
    .node-ring, .brand-dot, .logo-mark svg, .pulses circle, .login-card {
        animation: none !important;
    }
}