:root {
    --premium-login-black: #0a0807;
    --premium-login-charcoal: #15110f;
    --premium-login-wine: #65151f;
    --premium-login-gold: #b78946;
    --premium-login-gold-soft: #e8d4a4;
    --premium-login-cream: #f6ead8;
    --premium-login-muted: #a99a88;
    --premium-login-line: rgba(232, 212, 164, 0.22);
    --premium-login-display: "Bodoni 72", "Didot", "Cormorant Garamond", "Georgia", "Times New Roman", serif;
    --premium-login-sans: "Aptos", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    overflow-x: hidden;
}

.premium-login-page {
    min-height: 100vh;
    min-height: 100svh;
    color: var(--premium-login-cream);
    background:
        radial-gradient(circle at 74% 26%, rgba(183, 137, 70, 0.13), transparent 28%),
        linear-gradient(135deg, #0a0807 0%, #17110f 48%, #090807 100%);
    font-family: var(--premium-login-sans);
    -webkit-font-smoothing: antialiased;
    text-rendering: geometricPrecision;
}

.premium-login-page button,
.premium-login-page input {
    font: inherit;
}

.premium-login-shell {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    overflow: hidden;
    background: #0a0807;
}

.premium-login-bg,
.premium-login-bg img,
.premium-login-tint {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.premium-login-bg {
    display: block;
    opacity: 0;
    transition: opacity 240ms ease;
}

.premium-login-assets-ready .premium-login-bg,
.premium-login-assets-ready .premium-login-logo {
    opacity: 1;
}

.premium-login-bg img {
    object-fit: cover;
    object-position: center;
    filter: saturate(0.96) contrast(1.04);
}

.premium-login-tint {
    z-index: 1;
    background:
        linear-gradient(90deg, rgba(8, 6, 5, 0.92) 0%, rgba(10, 8, 7, 0.76) 42%, rgba(10, 8, 7, 0.60) 100%),
        radial-gradient(circle at 72% 30%, rgba(183, 137, 70, 0.18), transparent 28%),
        radial-gradient(circle at 74% 70%, rgba(101, 21, 31, 0.24), transparent 34%);
}

.premium-login-main {
    position: relative;
    z-index: 2;
    width: min(1180px, calc(100vw - 56px));
    min-height: 100vh;
    min-height: 100svh;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 416px;
    align-items: center;
    gap: clamp(42px, 6vw, 92px);
    padding: 48px 0;
}

.premium-login-brand {
    min-width: 0;
}

.premium-login-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 12px;
    border: 1px solid rgba(232, 212, 164, 0.30);
    border-radius: 999px;
    background: rgba(12, 9, 8, 0.46);
    color: var(--premium-login-gold-soft);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.20em;
}

.premium-login-title {
    margin: 34px 0 0;
    max-width: 650px;
    color: #fff7e8;
    font-family: var(--premium-login-display);
    font-size: clamp(48px, 6vw, 78px);
    line-height: 0.96;
    font-weight: 600;
    letter-spacing: 0.085em;
    text-transform: uppercase;
    text-shadow: 0 18px 46px rgba(0, 0, 0, 0.58);
}

.premium-login-subtitle {
    margin: 22px 0 0;
    color: var(--premium-login-gold-soft);
    font-size: clamp(14px, 1.35vw, 18px);
    font-weight: 300;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.premium-login-cn {
    margin: 13px 0 0;
    color: rgba(246, 234, 216, 0.82);
    font-size: 17px;
    letter-spacing: 0.08em;
}

.premium-login-logos {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    width: min(580px, 100%);
    margin-top: 38px;
}

.premium-login-logo {
    width: 100%;
    height: auto;
    aspect-ratio: 620 / 216;
    display: block;
    padding: 9px 10px;
    border: 1px solid rgba(255, 255, 255, 0.82);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.24);
    object-fit: contain;
    opacity: 0;
    transition: opacity 240ms ease;
}


.premium-login-card {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(232, 212, 164, 0.20);
    border-radius: 26px;
    padding: 30px;
    background:
        linear-gradient(150deg, rgba(34, 24, 20, 0.84), rgba(14, 10, 9, 0.72)),
        rgba(15, 11, 10, 0.72);
    box-shadow:
        0 34px 82px rgba(0, 0, 0, 0.50),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px) saturate(1.12);
    animation: premium-login-card-in 260ms ease-out both;
}

.premium-login-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 18% 12%, rgba(183, 137, 70, 0.18), transparent 28%),
        linear-gradient(112deg, transparent 0%, rgba(255, 255, 255, 0.07) 44%, transparent 56%);
    pointer-events: none;
}

.premium-login-card > * {
    position: relative;
    z-index: 1;
}

.premium-login-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 24px;
}

.premium-login-card-head p {
    margin: 0 0 7px;
    color: rgba(232, 212, 164, 0.62);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.18em;
}

.premium-login-card-head h2 {
    margin: 0;
    color: #fff7e8;
    font-size: 25px;
    line-height: 1.18;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.premium-login-card-head span {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    border-radius: 50%;
    border: 1px solid rgba(183, 137, 70, 0.48);
    color: var(--premium-login-gold-soft);
    background: rgba(183, 137, 70, 0.09);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.premium-login-alerts {
    display: grid;
    gap: 10px;
    margin-bottom: 18px;
}

.premium-login-alert {
    padding: 11px 13px;
    border: 1px solid rgba(220, 38, 38, 0.36);
    border-radius: 14px;
    color: #ffe0df;
    background: rgba(101, 21, 31, 0.34);
    font-size: 13px;
    line-height: 1.45;
}

.premium-login-alert-success {
    border-color: rgba(22, 163, 74, 0.34);
    color: #dcfce7;
    background: rgba(22, 101, 52, 0.24);
}

.premium-login-form {
    display: grid;
    gap: 17px;
}

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

.premium-login-field span {
    color: rgba(246, 234, 216, 0.74);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
}

.premium-login-field input {
    width: 100%;
    height: 50px;
    padding: 0 15px;
    border: 1px solid rgba(232, 212, 164, 0.22);
    border-radius: 16px;
    outline: none;
    color: #fff7e8;
    background: rgba(6, 5, 4, 0.42);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.premium-login-field input::placeholder {
    color: rgba(169, 154, 136, 0.66);
}

.premium-login-field input:focus {
    border-color: rgba(183, 137, 70, 0.76);
    background: rgba(6, 5, 4, 0.52);
    box-shadow:
        0 0 0 4px rgba(183, 137, 70, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.premium-login-submit {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 52px;
    margin-top: 4px;
    border: 0;
    border-radius: 17px;
    color: #fff8ea;
    cursor: pointer;
    background: linear-gradient(135deg, #65151f 0%, #8b1f2a 42%, #b78946 100%);
    box-shadow:
        0 18px 36px rgba(101, 21, 31, 0.38),
        inset 0 1px 0 rgba(255, 255, 255, 0.22);
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.14em;
    transition: transform 180ms ease, filter 180ms ease, box-shadow 180ms ease;
}

.premium-login-submit::after {
    content: "";
    position: absolute;
    inset: -40% auto -40% -46%;
    width: 42%;
    transform: rotate(18deg);
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    animation: premium-login-shine 4.8s ease-in-out infinite;
}

.premium-login-submit:hover {
    transform: translateY(-1px);
    filter: brightness(1.04);
}

.premium-login-submit:active {
    transform: translateY(0);
}

.premium-login-submit span {
    position: relative;
    z-index: 1;
}

@keyframes premium-login-card-in {
    from {
        opacity: 0;
        transform: translateY(14px) scale(0.985);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes premium-login-shine {
    0%, 58% { left: -46%; }
    78%, 100% { left: 116%; }
}

@media (max-width: 980px) {
    .premium-login-main {
        width: min(660px, calc(100vw - 32px));
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 30px 0;
    }

    .premium-login-title {
        margin-top: 24px;
        font-size: clamp(42px, 10vw, 62px);
    }

    .premium-login-logos {
        width: 100%;
        max-width: 560px;
        margin-top: 24px;
    }
}

@media (max-width: 640px) {
    .premium-login-bg img {
        object-position: center;
    }

    .premium-login-tint {
        background:
            linear-gradient(180deg, rgba(8, 6, 5, 0.84) 0%, rgba(8, 6, 5, 0.62) 42%, rgba(8, 6, 5, 0.88) 100%),
            radial-gradient(circle at 50% 20%, rgba(183, 137, 70, 0.12), transparent 32%);
    }

    .premium-login-main {
        width: min(100% - 24px, 430px);
        min-height: 100svh;
        align-content: start;
        padding: 18px 0 20px;
        gap: 18px;
    }

    .premium-login-kicker {
        min-height: 26px;
        font-size: 10px;
        letter-spacing: 0.12em;
    }

    .premium-login-title {
        margin-top: 18px;
        font-size: 39px;
        line-height: 1.02;
        letter-spacing: 0.065em;
    }

    .premium-login-subtitle {
        margin-top: 12px;
        font-size: 12px;
        letter-spacing: 0.10em;
    }

    .premium-login-cn {
        margin-top: 9px;
        font-size: 14px;
        letter-spacing: 0.04em;
    }

    .premium-login-logos {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        margin-top: 15px;
    }

    .premium-login-logo {
        padding: 5px 6px;
        border-radius: 9px;
    }

    .premium-login-card {
        border-radius: 22px;
        padding: 22px;
    }

    .premium-login-card-head {
        margin-bottom: 18px;
    }

    .premium-login-card-head h2 {
        font-size: 22px;
    }

    .premium-login-card-head span {
        width: 42px;
        height: 42px;
    }

    .premium-login-field input,
    .premium-login-submit {
        height: 48px;
    }
}

@media (max-width: 370px) {
    .premium-login-main {
        width: calc(100% - 18px);
    }

    .premium-login-title {
        font-size: 34px;
    }

    .premium-login-card {
        padding: 18px;
    }
}

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