:root {
    color-scheme: light;
    --bg: #ece6dc;
    --bg-2: #d8cec0;
    --surface: rgba(255, 249, 240, 0.84);
    --surface-strong: #fbf5ea;
    --surface-dark: #2f3438;
    --line: rgba(72, 54, 37, 0.12);
    --text: #20252a;
    --muted: #706655;
    --accent: #d36a28;
    --accent-soft: #f4d1b3;
    --accent-deep: #a24d17;
    --ok: #b45c24;
    --off: #c5b6a4;
    --shadow: 0 22px 46px rgba(56, 37, 18, 0.16);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.78), transparent 34%),
        radial-gradient(circle at bottom right, rgba(211, 106, 40, 0.18), transparent 28%),
        linear-gradient(160deg, var(--bg), var(--bg-2));
    background-attachment: fixed;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.24) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.24) 1px, transparent 1px);
    background-size: 24px 24px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 82%);
    pointer-events: none;
}

button {
    font: inherit;
}

.app-shell {
    width: min(1120px, 100%);
    margin: 0 auto;
    padding: 24px 18px 80px;
    position: relative;
}

.masthead {
    display: flex;
    gap: 18px;
    align-items: stretch;
    justify-content: space-between;
    padding: 24px;
    border-radius: 34px;
    background: linear-gradient(145deg, rgba(35, 40, 44, 0.96), rgba(57, 62, 68, 0.92));
    color: #fffaf2;
    box-shadow: var(--shadow);
    position: sticky;
    top: 16px;
    z-index: 10;
    backdrop-filter: blur(12px);
}

.masthead__copy h1 {
    margin: 6px 0 8px;
    font-size: clamp(2rem, 6vw, 3.1rem);
    line-height: 0.95;
}

.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    font-size: 0.72rem;
    color: rgba(255, 245, 228, 0.68);
}

.subtitle {
    margin: 0;
    max-width: 34ch;
    color: rgba(255, 245, 228, 0.76);
    line-height: 1.45;
}

.masthead__tools {
    min-width: 168px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-end;
    gap: 12px;
}

.masthead__actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.digital-clock {
    padding: 14px 18px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 1.6rem;
    letter-spacing: 0.06em;
    font-variant-numeric: tabular-nums;
}

.refresh-chip {
    appearance: none;
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    background: linear-gradient(135deg, var(--accent), #f39d55);
    color: #fff;
    font-weight: 700;
    box-shadow: 0 12px 24px rgba(211, 106, 40, 0.28);
    cursor: pointer;
}

.ghost-chip {
    appearance: none;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.08);
    color: #fffaf2;
    font-weight: 700;
    cursor: pointer;
}

.refresh-chip.is-loading {
    opacity: 0.72;
    pointer-events: none;
}

.status-strip,
.system-panel,
.room-card {
    backdrop-filter: blur(14px);
}

.status-strip {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.status-card {
    padding: 16px 18px;
    border-radius: var(--radius-lg);
    background: var(--surface);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.status-card__label {
    display: block;
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 8px;
}

.status-card__value {
    font-size: 1.05rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 82px;
    padding: 9px 12px;
    border-radius: 999px;
    font-size: 0.92rem;
}

.status-pill--idle,
.status-pill--stale {
    color: #6a5d4d;
    background: rgba(186, 169, 146, 0.28);
}

.status-pill--online {
    color: #fff;
    background: linear-gradient(135deg, #cd6b2a, #e7934f);
}

.status-pill--error {
    color: #fff;
    background: linear-gradient(135deg, #91331c, #c74a2b);
}

.system-panel {
    margin-top: 18px;
    padding: 20px;
    border-radius: 32px;
    background: linear-gradient(145deg, rgba(251, 245, 234, 0.92), rgba(240, 230, 215, 0.84));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.system-panel__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 14px;
    margin-bottom: 18px;
}

.system-panel__header h2 {
    margin: 6px 0 0;
    font-size: 1.45rem;
}

.system-panel__hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.system-panel__body {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 14px;
}

.system-tile {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 18px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(98, 74, 49, 0.08);
}

.system-tile--compact {
    align-items: flex-start;
}

.system-tile__copy {
    display: grid;
    gap: 4px;
}

.system-tile__meta {
    color: var(--muted);
    font-size: 0.8rem;
}

.system-tile__eyebrow {
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
}

.system-switch {
    appearance: none;
    border: 0;
    min-width: 110px;
    min-height: 56px;
    border-radius: 999px;
    padding: 10px 18px;
    background: linear-gradient(135deg, #d7c9ba, #b5a28d);
    color: #fff;
    font-weight: 800;
    cursor: pointer;
}

.system-switch.is-on {
    background: linear-gradient(135deg, var(--accent), #f0a262);
    box-shadow: 0 12px 24px rgba(211, 106, 40, 0.22);
}

.system-switch.is-pending {
    opacity: 0.72;
    pointer-events: none;
}

.air-panel {
    margin-top: 18px;
    padding: 20px;
    border-radius: 32px;
    background: linear-gradient(155deg, rgba(237, 245, 246, 0.96), rgba(225, 237, 239, 0.88));
    border: 1px solid rgba(54, 88, 92, 0.12);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.air-panel__header h2 {
    margin: 6px 0 0;
    font-size: 1.45rem;
}

.ac-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 14px;
}

.ac-card {
    padding: 18px;
    border-radius: 26px;
    background: linear-gradient(160deg, rgba(252, 255, 255, 0.88), rgba(231, 243, 244, 0.94));
    border: 1px solid rgba(57, 94, 98, 0.14);
    box-shadow: 0 18px 34px rgba(34, 67, 70, 0.12);
    display: grid;
    gap: 16px;
}

.ac-card.is-pending {
    opacity: 0.76;
}

.ac-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
}

.ac-card__header h3 {
    margin: 6px 0 4px;
    font-size: 1.3rem;
}

.ac-card__header p {
    margin: 0;
    color: #587177;
    font-size: 0.88rem;
}

.ac-card__eyebrow {
    display: inline-block;
    font-size: 0.74rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #587177;
}

.ac-power {
    appearance: none;
    border: 0;
    min-width: 92px;
    min-height: 52px;
    border-radius: 999px;
    padding: 10px 16px;
    background: linear-gradient(135deg, #bfd0d2, #91adb1);
    color: #fff;
    font-weight: 800;
    cursor: pointer;
}

.ac-power.is-on {
    background: linear-gradient(135deg, #2d7f84, #58adb1);
    box-shadow: 0 14px 24px rgba(45, 127, 132, 0.22);
}

.ac-power:disabled {
    cursor: default;
}

.ac-metric-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.ac-control-stack {
    display: grid;
    gap: 12px;
}

.ac-control-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.ac-field {
    display: grid;
    gap: 8px;
}

.ac-field span {
    color: #4f656a;
    font-size: 0.88rem;
    font-weight: 700;
}

.ac-field__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.ac-field__row strong {
    font-size: 1rem;
}

.ac-select {
    width: 100%;
    min-height: 48px;
    border-radius: 16px;
    border: 1px solid rgba(57, 94, 98, 0.14);
    background: rgba(255, 255, 255, 0.76);
    color: var(--text);
    padding: 0 14px;
    font: inherit;
}

.ac-range {
    width: 100%;
    accent-color: #2d7f84;
}

.ac-range__legend {
    display: flex;
    justify-content: space-between;
    color: #587177;
    font-size: 0.82rem;
}

.ac-toggle-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ac-timer-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.ac-timer-card {
    padding: 14px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(57, 94, 98, 0.12);
    display: grid;
    gap: 12px;
}

.ac-timer-card__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.ac-timer-card__head span,
.ac-timer-field span {
    color: #587177;
    font-size: 0.88rem;
    font-weight: 700;
}

.ac-timer-card__head small {
    display: block;
    margin-top: 2px;
    color: #6b8287;
    font-size: 0.78rem;
}

.ac-timer-card__head strong {
    font-size: 0.96rem;
    text-align: right;
}

.ac-timer-card__status {
    min-height: 36px;
    padding: 10px 12px;
    border-radius: 14px;
    background: rgba(45, 127, 132, 0.08);
    color: #3f5d63;
    font-size: 0.88rem;
    line-height: 1.35;
}

.ac-timer-card__controls {
    display: grid;
    gap: 8px;
}

.ac-timer-card__controls--absolute,
.ac-timer-card__controls--sleep {
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: end;
}

.ac-timer-field {
    display: grid;
    gap: 6px;
}

.ac-time-input {
    width: 100%;
    min-height: 42px;
    border-radius: 14px;
    border: 1px solid rgba(57, 94, 98, 0.14);
    background: rgba(255, 255, 255, 0.78);
    color: var(--text);
    padding: 0 12px;
    font: inherit;
}

.ac-duration-inputs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.ac-duration-field {
    min-height: 42px;
    border-radius: 14px;
    border: 1px solid rgba(57, 94, 98, 0.14);
    background: rgba(255, 255, 255, 0.78);
    display: grid;
    grid-template-columns: minmax(34px, 1fr) auto;
    align-items: center;
    overflow: hidden;
}

.ac-duration-field input {
    width: 100%;
    min-width: 0;
    border: 0;
    background: transparent;
    color: var(--text);
    padding: 0 4px 0 12px;
    font: inherit;
    font-weight: 700;
}

.ac-duration-field input:focus {
    outline: none;
}

.ac-duration-field span {
    padding-right: 10px;
    color: #587177;
    font-size: 0.84rem;
    font-weight: 700;
}

.ac-timer-button {
    appearance: none;
    border: 0;
    min-height: 42px;
    border-radius: 14px;
    padding: 0 12px;
    background: linear-gradient(135deg, #2d7f84, #58adb1);
    color: #fff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.ac-timer-button--ghost {
    border: 1px solid rgba(57, 94, 98, 0.14);
    background: rgba(255, 255, 255, 0.78);
    color: #496066;
}

.ac-timer-button:disabled {
    cursor: default;
    opacity: 0.72;
}

.ac-toggle-pill {
    appearance: none;
    border: 1px solid rgba(57, 94, 98, 0.14);
    min-height: 42px;
    border-radius: 999px;
    padding: 0 14px;
    background: rgba(255, 255, 255, 0.78);
    color: #496066;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

.ac-toggle-pill.is-on {
    background: linear-gradient(135deg, #2d7f84, #58adb1);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 10px 20px rgba(45, 127, 132, 0.18);
}

.ac-toggle-pill:disabled {
    cursor: default;
    opacity: 0.72;
}

.ac-note,
.air-empty {
    padding: 16px 18px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.56);
    border: 1px solid rgba(57, 94, 98, 0.12);
    color: #4d656b;
    line-height: 1.5;
}

.room-grid {
    margin-top: 20px;
    display: grid;
    gap: 18px;
}

.room-card {
    padding: 20px;
    border-radius: 32px;
    background: linear-gradient(160deg, rgba(251, 246, 237, 0.94), rgba(240, 232, 220, 0.86));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.room-card::after {
    content: "";
    position: absolute;
    right: -36px;
    top: -36px;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(211, 106, 40, 0.14), transparent 66%);
}

.room-card__header,
.room-card__body {
    position: relative;
    z-index: 1;
}

.room-card__header {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: flex-start;
}

.room-card__header h2 {
    margin: 6px 0 0;
    font-size: 1.55rem;
}

.room-card__note {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 0.85rem;
}

.temperature-rack {
    display: grid;
    grid-template-columns: repeat(2, minmax(78px, auto));
    gap: 10px;
}

.temperature-chip {
    padding: 10px 12px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid rgba(103, 80, 54, 0.08);
    text-align: right;
}

.temperature-chip span {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
}

.temperature-chip strong {
    font-size: 1.18rem;
    font-variant-numeric: tabular-nums;
}

.room-card__body {
    margin-top: 18px;
    display: grid;
    grid-template-columns: 1.55fr 0.95fr;
    gap: 14px;
}

.panel {
    padding: 16px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.56);
    border: 1px solid rgba(99, 75, 48, 0.08);
}

.panel__head {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 12px;
}

.panel__eyebrow {
    font-size: 0.74rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted);
}

.light-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.control-button,
.heating-button {
    position: relative;
    overflow: hidden;
    border: 0;
    cursor: pointer;
    touch-action: manipulation;
}

.control-button {
    min-height: 108px;
    padding: 16px;
    border-radius: 24px;
    background: linear-gradient(145deg, rgba(217, 205, 191, 0.86), rgba(200, 185, 166, 0.92));
    color: #fff;
    display: grid;
    align-content: space-between;
    text-align: left;
}

.control-button::before,
.heating-button::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.22), transparent 52%);
    pointer-events: none;
}

.control-button__meta {
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 248, 240, 0.76);
}

.control-button__title {
    font-size: 1.1rem;
}

.control-button__state {
    justify-self: start;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    font-size: 0.86rem;
    font-weight: 700;
}

.control-button.is-on {
    background: linear-gradient(145deg, var(--accent), #ef9c58);
    box-shadow: 0 16px 30px rgba(211, 106, 40, 0.26);
}

.control-button.is-pending,
.heating-button.is-pending {
    opacity: 0.72;
    pointer-events: none;
}

.heating-button {
    min-height: 100%;
    width: 100%;
    border-radius: 28px;
    padding: 18px;
    background: linear-gradient(145deg, rgba(54, 58, 62, 0.94), rgba(38, 41, 45, 0.96));
    color: #fff7ef;
    display: grid;
    place-items: center;
    gap: 10px;
}

.heating-button__halo {
    width: 92px;
    height: 92px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.18);
    box-shadow: inset 0 0 0 12px rgba(255, 255, 255, 0.06);
}

.heating-button__caption {
    color: rgba(255, 247, 239, 0.74);
    font-size: 0.94rem;
}

.heating-button__state {
    font-size: 1.4rem;
    letter-spacing: 0.06em;
}

.heating-button.is-on {
    background: radial-gradient(circle at top, rgba(243, 153, 81, 0.98), rgba(168, 74, 25, 0.98));
    box-shadow: 0 22px 34px rgba(174, 84, 29, 0.28);
}

.heating-button.is-on .heating-button__halo {
    border-color: rgba(255, 250, 245, 0.42);
    box-shadow: inset 0 0 0 12px rgba(255, 255, 255, 0.16), 0 0 26px rgba(255, 233, 214, 0.42);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 26px;
    transform: translateX(-50%);
    padding: 12px 18px;
    border-radius: 999px;
    background: rgba(34, 38, 42, 0.92);
    color: #fff;
    box-shadow: var(--shadow);
    max-width: min(92vw, 560px);
    text-align: center;
    z-index: 20;
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card {
    width: min(520px, 100%);
    padding: 28px;
    border-radius: 34px;
    background: linear-gradient(160deg, rgba(36, 39, 43, 0.95), rgba(66, 56, 45, 0.92));
    color: #fff6eb;
    box-shadow: var(--shadow);
}

.auth-card__hero h1 {
    margin: 8px 0 12px;
    font-size: clamp(2rem, 7vw, 3rem);
}

.auth-card__hero p:last-child {
    margin: 0;
    line-height: 1.6;
    color: rgba(255, 246, 235, 0.78);
}

.auth-form {
    margin-top: 22px;
    display: grid;
    gap: 14px;
}

.auth-field {
    display: grid;
    gap: 8px;
    font-weight: 700;
}

.auth-field span {
    color: rgba(255, 246, 235, 0.82);
}

.auth-field input {
    width: 100%;
    padding: 16px 18px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    font-size: 1rem;
}

.auth-field input::placeholder {
    color: rgba(255, 255, 255, 0.42);
}

.auth-check {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 246, 235, 0.82);
    font-weight: 700;
}

.auth-check input {
    width: 18px;
    height: 18px;
    margin: 0;
    accent-color: var(--accent);
}

.auth-check input:disabled {
    opacity: 0.52;
}

.auth-submit {
    appearance: none;
    border: 0;
    border-radius: 999px;
    padding: 14px 20px;
    background: linear-gradient(135deg, var(--accent), #f39d55);
    color: #fff;
    font-weight: 800;
    cursor: pointer;
}

.auth-submit:disabled {
    opacity: 0.52;
    cursor: not-allowed;
}

.auth-note {
    margin-top: 18px;
    padding: 14px 16px;
    border-radius: 18px;
    line-height: 1.5;
}

.auth-note--ok {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 246, 235, 0.86);
}

.auth-note--warn {
    background: rgba(225, 167, 73, 0.18);
    color: #ffe7b3;
}

.auth-note--error {
    background: rgba(196, 74, 43, 0.22);
    color: #ffd6cc;
}

@media (max-width: 860px) {
    .masthead,
    .system-panel__body,
    .room-card__body,
    .status-strip {
        grid-template-columns: 1fr;
    }

    .masthead {
        position: static;
        flex-direction: column;
    }

    .masthead__tools {
        min-width: 0;
        align-items: stretch;
    }

    .masthead__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .digital-clock,
    .refresh-chip,
    .ghost-chip {
        width: 100%;
        text-align: center;
    }

    .status-strip,
    .system-panel__body,
    .room-card__body {
        display: grid;
    }
}

@media (max-width: 640px) {
    .app-shell {
        padding: 16px 14px 86px;
    }

    .masthead {
        padding: 20px;
        border-radius: 28px;
    }

    .light-grid {
        grid-template-columns: 1fr 1fr;
    }

    .room-card {
        padding: 16px;
        border-radius: 26px;
    }

    .room-card__header {
        flex-direction: column;
    }

    .ac-card__header {
        flex-direction: column;
    }

    .ac-metric-grid {
        grid-template-columns: 1fr;
    }

    .ac-control-grid {
        grid-template-columns: 1fr;
    }

    .ac-timer-grid {
        grid-template-columns: 1fr;
    }

    .ac-timer-card__controls {
        grid-template-columns: 1fr;
    }

    .ac-duration-inputs {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .temperature-rack {
        width: 100%;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .auth-card {
        padding: 22px;
        border-radius: 26px;
    }

    .panel {
        padding: 14px;
    }

    .control-button {
        min-height: 96px;
    }
}