body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 12% 18%, rgba(255,255,255,0.18) 0%, rgba(255,255,255,0.05) 10%, transparent 18%),
        radial-gradient(circle at 88% 85%, rgba(255,221,87,0.18) 0%, rgba(255,221,87,0.06) 10%, transparent 18%),
        linear-gradient(145deg, #081b45 0%, #103f95 40%, #2574dd 100%);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.sksu-v3-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
    position: relative;
    overflow: hidden;
}

.sksu-v3-page::before,
.sksu-v3-page::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.sksu-v3-page::before {
    width: 260px;
    height: 260px;
    top: 40px;
    left: -40px;
    background: radial-gradient(circle, rgba(255,255,255,0.22) 0%, rgba(255,255,255,0.04) 45%, transparent 70%);
    filter: blur(8px);
}

.sksu-v3-page::after {
    width: 320px;
    height: 320px;
    right: -70px;
    bottom: -40px;
    background: radial-gradient(circle, rgba(255,221,87,0.18) 0%, rgba(255,221,87,0.04) 45%, transparent 70%);
    filter: blur(10px);
}

.sksu-v3-shell {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
}

.sksu-v3-top {
    text-align: center;
    color: #fff;
    margin-bottom: 22px;
}

.sksu-v3-kicker {
    display: inline-block;
    padding: 7px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,0.14);
    border: 1px solid rgba(255,255,255,0.18);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.9px;
    margin-bottom: 12px;
}

.sksu-v3-top h1 {
    margin: 0 0 8px;
    font-size: 2.15rem;
    font-weight: 800;
    line-height: 1.15;
    text-shadow: 0 4px 18px rgba(0,0,0,0.16);
}

.sksu-v3-top p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.55;
    color: rgba(255,255,255,0.93);
}

.sksu-v3-card-wrap {
    background: rgba(255,255,255,0.14);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 30px;
    box-shadow: 0 24px 60px rgba(0,0,0,0.22);
    overflow: hidden;
}

.sksu-v3-card {
    background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,251,255,0.98) 100%);
    border-radius: 28px;
    margin: 10px;
    padding: 32px 28px 24px;
}

.sksu-v3-header {
    text-align: center;
    margin-bottom: 24px;
}

.sksu-v3-logo-ring {
    width: 150px;
    height: 150px;
    margin: 0 auto 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #ffffff 0%, #f4f8ff 100%);
    border: 4px solid rgba(255,255,255,0.92);
    box-shadow:
        0 14px 35px rgba(17,72,168,0.16),
        inset 0 1px 0 rgba(255,255,255,0.9);
}

.sksu-v3-logo {
    width: 108px;
    height: 108px;
    object-fit: contain;
}

.sksu-v3-badge {
    display: inline-block;
    background: linear-gradient(135deg, #1148a8, #1d75d8);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 8px 15px;
    border-radius: 999px;
    box-shadow: 0 8px 18px rgba(17,72,168,0.24);
    margin-bottom: 14px;
}

.sksu-v3-school-name {
    font-size: 1.55rem;
    font-weight: 800;
    color: #0d2f73;
    line-height: 1.25;
    margin-bottom: 6px;
}

.sksu-v3-school-sub {
    font-size: 0.96rem;
    color: #64748b;
    line-height: 1.5;
}

.sksu-v3-form {
    text-align: left;
}

.sksu-v3-form-group {
    margin-bottom: 16px;
}

.sksu-v3-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: #22324a;
}

.sksu-v3-input-wrap {
    position: relative;
}

.sksu-v3-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: #6c7a8b;
    pointer-events: none;
}

.sksu-v3-input {
    width: 100%;
    min-height: 52px;
    border-radius: 16px;
    border: 1px solid #d6e0ee;
    background: #ffffff;
    box-sizing: border-box;
    padding: 12px 14px 12px 46px;
    font-size: 0.97rem;
    color: #233044;
    outline: none;
    transition: all 0.2s ease;
}

.sksu-v3-input:focus {
    border-color: #1d75d8;
    box-shadow: 0 0 0 0.2rem rgba(29,117,216,0.14);
}

.sksu-v3-btn {
    width: 100%;
    min-height: 52px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, #0f3f98, #1f76de);
    color: #fff;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.2px;
    cursor: pointer;
    box-shadow: 0 14px 28px rgba(17,72,168,0.22);
    transition: all 0.2s ease;
    margin-top: 6px;
}

.sksu-v3-btn:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, #0d377f, #1a68c5);
    box-shadow: 0 18px 32px rgba(17,72,168,0.26);
}

.sksu-v3-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 18px;
}

.sksu-v3-info-box {
    background: #f5f9ff;
    border: 1px solid #dbe8ff;
    border-radius: 16px;
    padding: 13px 14px;
    text-align: left;
}

.sksu-v3-info-title {
    font-size: 0.84rem;
    font-weight: 800;
    color: #0f3f98;
    margin-bottom: 5px;
}

.sksu-v3-info-text {
    font-size: 0.84rem;
    color: #5f6b7a;
    line-height: 1.45;
}

.sksu-v3-security {
    margin-top: 16px;
    background: linear-gradient(180deg, #f8fbff 0%, #f3f8ff 100%);
    border: 1px solid #dbe8ff;
    color: #405a7c;
    border-radius: 16px;
    padding: 14px;
    font-size: 0.9rem;
    line-height: 1.55;
    text-align: center;
}

.sksu-v3-security strong {
    color: #1148a8;
}

.sksu-v3-footer {
    text-align: center;
    margin-top: 14px;
    color: rgba(255,255,255,0.92);
    font-size: 0.88rem;
    text-shadow: 0 2px 8px rgba(0,0,0,0.10);
}

.alert {
    border-radius: 14px;
    font-size: 0.92rem;
}

@media (max-width: 768px) {
    .sksu-v3-page {
        padding: 22px 14px;
    }

    .sksu-v3-shell {
        max-width: 460px;
    }

    .sksu-v3-top h1 {
        font-size: 1.8rem;
    }

    .sksu-v3-top p {
        font-size: 0.92rem;
    }

    .sksu-v3-card {
        padding: 28px 22px 22px;
    }

    .sksu-v3-logo-ring {
        width: 130px;
        height: 130px;
    }

    .sksu-v3-logo {
        width: 92px;
        height: 92px;
    }

    .sksu-v3-school-name {
        font-size: 1.34rem;
    }

    .sksu-v3-school-sub {
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .sksu-v3-page {
        min-height: 100dvh;
        padding: 18px 12px;
        align-items: center;
    }

    .sksu-v3-shell {
        max-width: 100%;
    }

    .sksu-v3-top {
        margin-bottom: 16px;
    }

    .sksu-v3-kicker {
        font-size: 0.68rem;
        padding: 6px 12px;
        margin-bottom: 10px;
    }

    .sksu-v3-top h1 {
        font-size: 1.45rem;
        line-height: 1.22;
    }

    .sksu-v3-top p {
        font-size: 0.85rem;
        line-height: 1.45;
        padding: 0 8px;
    }

    .sksu-v3-card-wrap {
        border-radius: 24px;
    }

    .sksu-v3-card {
        margin: 8px;
        border-radius: 22px;
        padding: 22px 16px 18px;
    }

    .sksu-v3-logo-ring {
        width: 120px;
        height: 120px;
        margin-bottom: 14px;
    }

    .sksu-v3-logo {
        width: 84px;
        height: 84px;
    }

    .sksu-v3-badge {
        font-size: 0.72rem;
        padding: 7px 12px;
        margin-bottom: 12px;
    }

    .sksu-v3-school-name {
        font-size: 1.16rem;
    }

    .sksu-v3-school-sub {
        font-size: 0.84rem;
    }

    .sksu-v3-form-group {
        margin-bottom: 14px;
    }

    .sksu-v3-label {
        font-size: 0.9rem;
    }

    .sksu-v3-input {
        min-height: 47px;
        font-size: 0.92rem;
        border-radius: 14px;
    }

    .sksu-v3-btn {
        min-height: 48px;
        font-size: 0.95rem;
        border-radius: 14px;
    }

    .sksu-v3-info-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .sksu-v3-info-box {
        border-radius: 14px;
        padding: 12px;
    }

    .sksu-v3-security {
        margin-top: 14px;
        padding: 12px;
        font-size: 0.84rem;
        border-radius: 14px;
    }

    .sksu-v3-footer {
        margin-top: 12px;
        font-size: 0.82rem;
    }

    .alert {
        font-size: 0.86rem;
    }
}

@media (max-width: 380px) {
    .sksu-v3-top h1 {
        font-size: 1.28rem;
    }

    .sksu-v3-school-name {
        font-size: 1.06rem;
    }

    .sksu-v3-school-sub,
    .sksu-v3-info-text,
    .sksu-v3-security {
        font-size: 0.8rem;
    }
}