/* KKCSI Modern Light Theme Checkout Flow */
:root {
    --signup-bg: #f8fafc;
    --signup-card-bg: #ffffff;
    --signup-border: #e2e8f0;
    --signup-text: #0f172a;
    --signup-muted: #64748b;
    --signup-accent: #2563eb;
}

.kkcsi-signup-page {
    background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 100%) !important;
    min-height: 100vh !important;
    padding-top: 100px !important;
    padding-bottom: 80px !important;
    color: #0f172a !important;
}

.kkcsi-hs {
    max-width: 1040px !important;
    margin: 0 auto !important;
    color: #0f172a !important;
    background: #ffffff !important;
    padding: 36px 40px !important;
    border-radius: 24px !important;
    box-shadow: 0 20px 45px -10px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(226, 232, 240, 0.8) !important;
    border: 1px solid #e2e8f0 !important;
}

@media (max-width: 640px) {
    .kkcsi-hs {
        padding: 24px 20px !important;
        border-radius: 18px !important;
    }
}

.kkcsi-hs__form {
    display: grid !important;
    gap: 28px !important;
}

.kkcsi-hs__section {
    padding: 24px 28px !important;
    background: #f8fafc !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 18px !important;
    transition: all 0.2s ease !important;
}

.kkcsi-hs__section:focus-within {
    border-color: #93c5fd !important;
    background: #ffffff !important;
    box-shadow: 0 4px 15px -2px rgba(37, 99, 235, 0.05) !important;
}

.kkcsi-hs__section h2 {
    margin: 0 0 16px !important;
    font-size: 20px !important;
    font-weight: 800 !important;
    color: #0f172a !important;
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
}

/* Plan Selection Cards */
.kkcsi-hs__plans {
    display: block !important;
}

.kkcsi-hs__plan {
    display: flex !important;
    align-items: flex-start !important;
    gap: 14px !important;
    min-height: 120px !important;
    padding: 20px !important;
    border: 2px solid #e2e8f0 !important;
    border-radius: 16px !important;
    background: #ffffff !important;
    color: #0f172a !important;
    cursor: pointer !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
    position: relative !important;
}

.kkcsi-hs__plan:hover {
    border-color: #93c5fd !important;
    background: #f0f7ff !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.12) !important;
}

.kkcsi-hs__plan:has(input[type="radio"]:checked) {
    border-color: #2563eb !important;
    background: #eff6ff !important;
    box-shadow: 0 8px 24px -4px rgba(37, 99, 235, 0.18), inset 0 0 0 1px #2563eb !important;
}

.kkcsi-hs__plan input[type="radio"] {
    accent-color: #2563eb !important;
    width: 18px !important;
    height: 18px !important;
    margin-top: 4px !important;
}

.kkcsi-hs__plan span {
    display: grid !important;
    gap: 4px !important;
}

.kkcsi-hs__plan strong {
    color: #0f172a !important;
    font-size: 18px !important;
    font-weight: 800 !important;
    letter-spacing: -0.01em !important;
}

.kkcsi-hs__plan em {
    color: #2563eb !important;
    font-weight: 800 !important;
    font-style: normal !important;
    font-size: 15px !important;
}

.kkcsi-hs__plan small {
    color: #64748b !important;
    font-size: 12.5px !important;
    line-height: 1.4 !important;
}

/* Account Details Grid Inputs */
.kkcsi-hs__grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)) !important;
    gap: 18px !important;
}

.kkcsi-hs__grid label {
    display: grid !important;
    gap: 8px !important;
    font-size: 12px !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
    color: #475569 !important;
}

.kkcsi-hs__grid input,
.kkcsi-hs__grid select {
    width: 100% !important;
    padding: 13px 16px !important;
    border: 1.5px solid #cbd5e1 !important;
    border-radius: 12px !important;
    background: #ffffff !important;
    color: #0f172a !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    outline: none !important;
    transition: all 0.2s ease !important;
}

.kkcsi-hs__grid input:focus,
.kkcsi-hs__grid select:focus {
    border-color: #2563eb !important;
    background: #ffffff !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
}

.kkcsi-hs__grid input::placeholder {
    color: #94a3b8 !important;
    text-transform: none !important;
}

.kkcsi-hs__grid small {
    text-transform: none !important;
    color: #64748b !important;
    font-weight: 400 !important;
}

/* Payment Methods */
.kkcsi-hs__payments label {
    border: 2px solid #93c5fd !important;
    border-radius: 16px !important;
    padding: 18px 22px !important;
    background: #eff6ff !important;
    color: #0f172a !important;
    transition: all 0.2s ease !important;
}

.kkcsi-hs__payments label:hover {
    border-color: #2563eb !important;
    background: #e0f2fe !important;
}

.kkcsi-hs__payments strong {
    color: #1e3a8a !important;
    font-size: 16px !important;
}

.kkcsi-hs__payments small {
    color: #0369a1 !important;
}

/* Main Checkout Button */
.kkcsi-hs__submit {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 10px !important;
    width: 100% !important;
    padding: 18px 24px !important;
    border: none !important;
    border-radius: 16px !important;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%) !important;
    color: #ffffff !important;
    font-size: 16px !important;
    font-weight: 800 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
    cursor: pointer !important;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1) !important;
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3) !important;
}

.kkcsi-hs__submit:hover {
    background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 14px 30px rgba(37, 99, 235, 0.45) !important;
}

.kkcsi-hs__submit:active {
    transform: translateY(0) !important;
}

.kkcsi-hs__submit:disabled {
    opacity: 0.6 !important;
    cursor: not-allowed !important;
}

/* Terms Checkbox */
.kkcsi-hs form label:has(input[type="checkbox"]) {
    color: #475569 !important;
}

.kkcsi-hs form label:has(input[type="checkbox"]) a {
    color: #2563eb !important;
    text-decoration: underline !important;
}