/* ═══════════════════════════════════════════════════════
   CHECKOUT — Premium Dark UI v2
   ═══════════════════════════════════════════════════════ */

/* ─── Animations ──────────────────────────────────── */
@keyframes ckSlideUp {
    from { opacity: 0; transform: translateY(24px); filter: blur(6px); }
    to   { opacity: 1; transform: translateY(0);    filter: blur(0); }
}
@keyframes ckFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}
@keyframes ckGlow {
    0%, 100% { box-shadow: 0 0 30px rgba(0,85,254,0.08); }
    50%      { box-shadow: 0 0 50px rgba(0,85,254,0.16); }
}
@keyframes ckShine {
    from { left: -100%; }
    to   { left: 200%; }
}
@keyframes ckPriceGlow {
    0%, 100% {
        box-shadow:
            0 0 20px rgba(0,85,254,0.12),
            0 0 50px rgba(0,85,254,0.06),
            inset 0 1px 0 rgba(255,255,255,0.08),
            inset 0 -1px 0 rgba(0,0,0,0.15);
        text-shadow:
            0 0 10px rgba(0,85,254,0.5),
            0 0 30px rgba(0,85,254,0.3),
            0 0 60px rgba(0,85,254,0.15);
    }
    50% {
        box-shadow:
            0 0 28px rgba(0,85,254,0.2),
            0 0 70px rgba(0,85,254,0.10),
            inset 0 1px 0 rgba(255,255,255,0.10),
            inset 0 -1px 0 rgba(0,0,0,0.15);
        text-shadow:
            0 0 14px rgba(0,85,254,0.6),
            0 0 40px rgba(0,85,254,0.35),
            0 0 80px rgba(0,85,254,0.2);
    }
}

.ck-anim {
    animation: ckSlideUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ─── Top bar ─────────────────────────────────────── */
.ck-topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    height: 48px;
    background: rgba(4,4,10,0.90);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}
.ck-topbar-plan {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--accent);
}
.ck-topbar-back {
    font-size: 12px;
    color: rgba(255,255,255,0.35);
    transition: color 0.18s;
}
.ck-topbar-back:hover { color: #fff; }

/* ─── Page ────────────────────────────────────────── */
.ck-page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 120px 40px 60px;
    display: grid;
    grid-template-columns: 340px 1fr;
    column-gap: 48px;
    row-gap: 0;
    align-items: start;
    position: relative;
}
.ck-page::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse 40% 50% at 25% 50%, rgba(0,50,180,0.14) 0%, transparent 100%),
        radial-gradient(ellipse 40% 50% at 75% 30%, rgba(0,30,120,0.08) 0%, transparent 100%),
        #000;
    z-index: -1;
}

/* ─── Product image — left column ─────────────────── */
.ck-logo {
    grid-column: 1;
    grid-row: 1 / -1;
    position: sticky;
    top: 120px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}
.ck-logo-img {
    width: 280px;
    height: auto;
    filter: drop-shadow(0 24px 60px rgba(0,20,100,0.55));
    animation: ckFloat 5s ease-in-out infinite;
}

/* ─── Right column ────────────────────────────────── */
.ck-card, .ck-secure {
    grid-column: 2;
}

.ck-card {
    max-width: 500px;
    background: rgba(255,255,255,0.025);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    overflow: hidden;
}

/* ─── Label ───────────────────────────────────────── */
.ck-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: rgba(255,255,255,0.22);
    margin-bottom: 16px;
}

/* ─── Order Summary — Liquid Glass ────────────────── */
.ck-summary {
    padding: 24px 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.ck-summary-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.ck-badge {
    display: inline-block;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: #fff;
    background: var(--accent);
    padding: 3px 10px;
    border-radius: 5px;
    margin-bottom: 10px;
}
.ck-badge-monthly {
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.65);
}

.ck-plan-name {
    font-family: 'General Sans', 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 3px;
}
.ck-plan-sub {
    font-size: 12px;
    color: rgba(255,255,255,0.30);
}

.ck-plan-price {
    text-align: right;
    position: relative;
    z-index: 1;
}
.ck-price {
    font-family: 'General Sans', 'Inter', sans-serif;
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    color: #fff;
    text-shadow:
        0 0 10px rgba(0,85,254,0.5),
        0 0 30px rgba(0,85,254,0.3),
        0 0 60px rgba(0,85,254,0.15);
    position: relative;
    padding: 14px 22px;
    background: linear-gradient(
        135deg,
        rgba(0,85,254,0.08) 0%,
        rgba(255,255,255,0.06) 40%,
        rgba(0,85,254,0.05) 100%
    );
    border: 1px solid rgba(0,85,254,0.18);
    border-radius: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow:
        0 0 20px rgba(0,85,254,0.12),
        0 0 50px rgba(0,85,254,0.06),
        inset 0 1px 0 rgba(255,255,255,0.08),
        inset 0 -1px 0 rgba(0,0,0,0.15);
    animation: ckPriceGlow 4s ease-in-out infinite;
}
.ck-price-note {
    font-size: 11px;
    color: rgba(255,255,255,0.35);
    margin-top: 8px;
}

.ck-summary-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    position: relative;
    z-index: 1;
}
.ck-feat {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 12px;
    color: rgba(255,255,255,0.45);
}
.ck-feat svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}

/* ─── Steps ───────────────────────────────────────── */
.ck-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.ck-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}
.ck-step-num {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: rgba(255,255,255,0.20);
    border: 1.5px solid rgba(255,255,255,0.07);
    transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
}
.ck-step.active .ck-step-num {
    border-color: transparent;
    color: #fff;
    background: var(--accent);
    box-shadow: 0 0 20px rgba(0,85,254,0.40), 0 0 6px rgba(0,85,254,0.60);
}
.ck-step.done .ck-step-num {
    background: rgba(0,85,254,0.20);
    border-color: rgba(0,85,254,0.35);
    color: var(--accent);
}
.ck-step-label {
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.16em;
    color: rgba(255,255,255,0.16);
    transition: color 0.3s;
}
.ck-step.active .ck-step-label {
    color: rgba(255,255,255,0.55);
}
.ck-step-line {
    width: 48px;
    height: 1px;
    background: rgba(255,255,255,0.05);
    margin: 0 16px;
    margin-bottom: 18px;
}

/* ─── Form ────────────────────────────────────────── */
.ck-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 20px 24px 24px;
}
.ck-hidden { display: none !important; }

.ck-field {
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.ck-field label {
    font-size: 12px;
    font-weight: 500;
    color: rgba(255,255,255,0.40);
    letter-spacing: 0.02em;
}
.ck-optional {
    font-weight: 400;
    color: rgba(255,255,255,0.18);
    font-size: 10px;
    margin-left: 3px;
}

.ck-field input {
    background: rgba(255,255,255,0.035);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 10px;
    padding: 13px 14px;
    font-family: 'General Sans', 'Inter', sans-serif;
    font-size: 14px;
    color: #fff;
    outline: none;
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    -webkit-appearance: none;
}
.ck-field input::placeholder {
    color: rgba(255,255,255,0.14);
}
.ck-field input:hover {
    border-color: rgba(255,255,255,0.10);
    background: rgba(255,255,255,0.045);
}
.ck-field input:focus {
    border-color: rgba(0,85,254,0.45);
    box-shadow: 0 0 0 3px rgba(0,85,254,0.08), 0 0 24px rgba(0,85,254,0.06);
    background: rgba(255,255,255,0.05);
}

.ck-field-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
}

.ck-section-title {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,0.55);
    letter-spacing: 0.02em;
    padding-top: 8px;
    margin-bottom: -4px;
}

/* ─── Buttons ─────────────────────────────────────── */
.ck-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    font-family: 'General Sans', 'Inter', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4,0,0.2,1);
    box-shadow: 0 2px 10px rgba(0,85,254,0.25);
    margin-top: 2px;
    position: relative;
    overflow: hidden;
}
.ck-btn::after {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(105deg, transparent, rgba(255,255,255,0.12), transparent);
    transform: skewX(-15deg);
    transition: none;
    pointer-events: none;
}
.ck-btn:hover::after {
    left: 200%;
    transition: left 0.6s ease;
}
.ck-btn:hover {
    background: #1a6aff;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0,85,254,0.35);
}
.ck-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(0,85,254,0.20);
}
.ck-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}
.ck-btn span {
    margin-left: 4px;
    font-size: 15px;
}

.ck-btn-row {
    display: flex;
    gap: 10px;
    margin-top: 6px;
}
.ck-btn-back {
    padding: 13px 20px;
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 10px;
    background: transparent;
    color: rgba(255,255,255,0.35);
    font-family: 'General Sans', 'Inter', sans-serif;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.ck-btn-back:hover {
    border-color: rgba(255,255,255,0.14);
    color: #fff;
    background: rgba(255,255,255,0.03);
}

/* ─── Secure footer ───────────────────────────────── */
.ck-secure {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 14px;
    font-size: 11px;
    color: rgba(255,255,255,0.18);
    letter-spacing: 0.02em;
}
.ck-secure svg { opacity: 0.30; }

/* ─── Responsive ──────────────────────────────────── */
@media (max-width: 900px) {
    .ck-page {
        grid-template-columns: 1fr;
        max-width: 520px;
        padding: 100px 20px 60px;
        column-gap: 0;
    }
    .ck-logo {
        grid-row: auto;
        grid-column: 1;
        position: static;
        min-height: auto;
        margin-bottom: 20px;
    }
    .ck-logo-img {
        width: 220px;
        animation: none;
        filter: drop-shadow(0 20px 48px rgba(0,40,160,0.55));
    }
    .ck-card, .ck-secure {
        grid-column: 1;
        max-width: 100%;
        width: 100%;
    }
    .ck-label, .ck-summary, .ck-steps, .ck-form {
        grid-column: 1;
    }
}
@media (max-width: 600px) {
    .ck-page { padding: 90px 16px 48px; }
    .ck-logo { margin-bottom: 14px; }
    .ck-logo-img { width: 180px; }
    .ck-summary { padding: 20px; }
    .ck-summary-top { flex-direction: column; align-items: flex-start; gap: 12px; }
    .ck-plan-price { text-align: left; }
    .ck-price { font-size: 30px; padding: 10px 16px; }
    .ck-summary-features { grid-template-columns: 1fr; }
    .ck-field-row { grid-template-columns: 1fr; }
    .ck-btn-row { flex-direction: column; }
    .ck-btn-back { width: 100%; text-align: center; }
}