:root {
    color-scheme: light;
    --accent: #0a8cff;
    --accent-dark: #0074db;
    --text: #101114;
    --secondary: #7d8088;
    --line: #e7e9ee;
    --surface: #f5f6f8;
    --error: #e5484d;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 50% -10%, rgba(10, 140, 255, 0.10), transparent 38%),
        #fff;
    -webkit-font-smoothing: antialiased;
}

button,
input {
    font: inherit;
}

button {
    border: 0;
    cursor: pointer;
}

.activation-shell {
    width: min(100%, 520px);
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0 auto;
    padding: max(36px, env(safe-area-inset-top)) 22px max(24px, env(safe-area-inset-bottom));
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.activation-card {
    width: 100%;
    padding: 36px 30px 30px;
    border: 1px solid rgba(16, 17, 20, 0.06);
    border-radius: 32px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 22px 70px rgba(24, 39, 67, 0.10);
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    margin-bottom: 42px;
}

.app-mark {
    width: 43px;
    height: 43px;
    border-radius: 13px;
    display: grid;
    place-items: center;
    color: #fff;
    background: linear-gradient(145deg, #397bff, #2564e9);
    font-size: 29px;
    line-height: 1;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.brand-name {
    font-size: 18px;
    font-weight: 750;
    letter-spacing: -0.04em;
}

[hidden] {
    display: none !important;
}

.page-header {
    margin-bottom: 30px;
}

.eyebrow {
    margin-bottom: 10px;
    color: var(--accent);
    font-size: 14px;
    font-weight: 750;
}

.page-header h1 {
    margin-bottom: 12px;
    font-size: clamp(28px, 7vw, 36px);
    line-height: 1.16;
    letter-spacing: -0.055em;
}

.page-header > p:last-child {
    color: var(--secondary);
    font-size: 16px;
    line-height: 1.55;
    letter-spacing: -0.025em;
}

.login-actions {
    display: grid;
    gap: 12px;
}

.provider-button,
.primary-button,
.logout-button {
    width: 100%;
    min-height: 58px;
    border-radius: 17px;
    font-size: 17px;
    font-weight: 700;
    transition: transform 120ms ease, opacity 120ms ease, background-color 120ms ease;
}

.provider-button:active,
.primary-button:active,
.logout-button:active {
    transform: scale(0.985);
}

.provider-button:disabled,
.primary-button:disabled,
.logout-button:disabled {
    cursor: wait;
    opacity: 0.55;
}

.apple-button {
    color: #fff;
    background: #050505;
}

.kakao-button {
    color: #191600;
    background: #fee500;
}

.kakao-symbol {
    display: inline-block;
    width: 20px;
    height: 15px;
    margin-right: 9px;
    border-radius: 50%;
    background: #191600;
    position: relative;
    transform: translateY(2px);
}

.kakao-symbol::after {
    content: "";
    position: absolute;
    left: 3px;
    bottom: -3px;
    border-top: 5px solid #191600;
    border-right: 5px solid transparent;
    transform: rotate(12deg);
}

.account-summary {
    margin-bottom: 26px;
    padding: 17px 18px;
    border-radius: 17px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: var(--surface);
}

.account-summary > div {
    min-width: 0;
    display: grid;
    gap: 3px;
}

.summary-label {
    color: var(--secondary);
    font-size: 12px;
    font-weight: 650;
}

#account-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 17px;
}

.provider-pill {
    flex: 0 0 auto;
    padding: 7px 10px;
    border-radius: 999px;
    color: #5c6068;
    background: #fff;
    font-size: 12px;
    font-weight: 700;
}

#activation-form {
    display: grid;
}

#activation-form label {
    margin: 0 2px 9px;
    font-size: 14px;
    font-weight: 700;
}

#promotion-code {
    width: 100%;
    height: 60px;
    padding: 0 17px;
    border: 1.5px solid var(--line);
    border-radius: 16px;
    outline: none;
    color: var(--text);
    background: #fff;
    font-size: 16px;
    font-weight: 680;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    transition: border-color 120ms ease, box-shadow 120ms ease;
}

#promotion-code:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(10, 140, 255, 0.11);
}

#promotion-code::placeholder {
    color: #b8bbc2;
    font-weight: 550;
    letter-spacing: -0.01em;
}

.form-message {
    margin: 10px 3px 0;
    color: var(--error);
    font-size: 14px;
    line-height: 1.45;
}

.primary-button {
    margin-top: 16px;
    color: #fff;
    background: var(--accent);
}

.primary-button:hover {
    background: var(--accent-dark);
}

.logout-button {
    margin-top: 12px;
    color: #5f626a;
    background: transparent;
}

.logout-button:hover {
    background: var(--surface);
}

.logout-button.prominent {
    margin-top: 28px;
    border: 1px solid var(--line);
    background: #fff;
}

#loading-view {
    min-height: 260px;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 18px;
    color: var(--secondary);
    font-size: 15px;
}

.spinner {
    width: 28px;
    height: 28px;
    border: 3px solid #e7e9ed;
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.success-icon {
    width: 72px;
    height: 72px;
    margin: 8px auto 26px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--accent);
    font-size: 38px;
    font-weight: 800;
}

.success-header {
    margin-bottom: 0;
    text-align: center;
}

.supporter-badge {
    margin-top: 24px;
    padding: 13px 16px;
    border-radius: 15px;
    color: #765500;
    background: #fff4c5;
    text-align: center;
    font-size: 14px;
    font-weight: 720;
}

.supporter-badge span {
    margin-right: 5px;
    color: #f2b800;
}

.error-eyebrow {
    color: var(--error);
}

.activation-footer {
    margin-top: 22px;
    display: flex;
    justify-content: center;
    gap: 8px;
    color: #999ca3;
    font-size: 12px;
}

.activation-footer a {
    color: inherit;
    text-decoration: none;
}

@media (max-width: 560px) {
    .activation-shell {
        justify-content: flex-start;
        padding-left: 16px;
        padding-right: 16px;
    }

    .activation-card {
        padding: 30px 22px 24px;
        border-radius: 27px;
    }

    .brand {
        margin-bottom: 34px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}