/* =====================================================
   PREMIUM SUBSCRIPTION SYSTEM
   4 Styles • Scroll Trigger • Modern UI
   ===================================================== */

:root {
    --premium-radius: 22px;
    --premium-shadow: 0 40px 100px rgba(0,0,0,0.35);
    --premium-ease: cubic-bezier(.22,.61,.36,1);
}

/* =====================================================
   BASE CONTAINER
   ===================================================== */

.premium-box {
    position: fixed;
    z-index: 99999;
    opacity: 0;
    pointer-events: none;
    transition: all .5s var(--premium-ease);
}

.premium-box.visible {
    opacity: 1;
    pointer-events: auto;
}

/* =====================================================
   INNER WRAPPER
   ===================================================== */

.premium-inner {
    position: relative;
    padding: 40px;
    border-radius: var(--premium-radius);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    box-shadow: var(--premium-shadow);
    overflow: hidden;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(20px);
    color: white;
}

/* Animated gradient accent */
.premium-inner::before {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(270deg,#7f5af0,#5f3dc4,#ff6ec7,#7f5af0);
    background-size: 600% 600%;
    animation: gradientShift 10s ease infinite;
    z-index: -1;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */

.premium-inner h2 {
    margin: 0 0 12px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.premium-inner p {
    margin: 0 0 20px;
    font-size: 15px;
    opacity: 0.85;
}

/* =====================================================
   FORM ELEMENTS
   ===================================================== */

.premium-inner input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    border: none;
    outline: none;
    font-size: 15px;
    margin-bottom: 12px;
    transition: box-shadow .2s ease, transform .2s ease;
}

.premium-inner input:focus {
    box-shadow: 0 0 0 3px rgba(127,90,240,.4);
    transform: translateY(-1px);
}

.premium-inner button {
    width: 100%;
    padding: 14px;
    border-radius: 14px;
    border: none;
    background: linear-gradient(135deg,#7f5af0,#5f3dc4);
    background-size: 200% 200%;
    color: white;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: transform .2s var(--premium-ease),
                box-shadow .2s var(--premium-ease),
                background-position .4s ease;
}

.premium-inner button:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 40px rgba(0,0,0,.35);
    background-position: right center;
}

.premium-inner button:active {
    transform: translateY(0);
}

/* =====================================================
   CLOSE BUTTON
   ===================================================== */

.premium-close {
    position: absolute;
    top: 14px;
    right: 18px;
    font-size: 22px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity .2s ease, transform .2s ease;
}

.premium-close:hover {
    opacity: 1;
    transform: rotate(90deg);
}

/* =====================================================
   STYLE 1 — CENTER MODAL
   ===================================================== */

.premium-box.center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(.9);
}

.premium-box.center.visible {
    transform: translate(-50%, -50%) scale(1);
}

/* Overlay */
.premium-box.center::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.55);
    backdrop-filter: blur(4px);
    z-index: -2;
}

/* =====================================================
   STYLE 2 — SLIDER LEFT
   ===================================================== */

.premium-box.slider-left {
    top: 50%;
    left: 0;
    transform: translateX(-100%) translateY(-50%);
}

.premium-box.slider-left.visible {
    transform: translateX(0) translateY(-50%);
}

/* =====================================================
   STYLE 3 — SLIDER RIGHT
   ===================================================== */

.premium-box.slider-right {
    top: 50%;
    right: 0;
    transform: translateX(100%) translateY(-50%);
}

.premium-box.slider-right.visible {
    transform: translateX(0) translateY(-50%);
}

/* =====================================================
   STYLE 4 — SPOTLIGHT FLOAT
   ===================================================== */

.premium-box.spotlight {
    bottom: 40px;
    right: 40px;
    transform: scale(.85);
}

.premium-box.spotlight.visible {
    transform: scale(1);
}

/* Spotlight special styling */
.premium-box.spotlight .premium-inner {
    background: linear-gradient(135deg,#0f0c29,#302b63,#24243e);
    border-radius: 28px;
    box-shadow: 0 30px 80px rgba(0,0,0,.45);
}

/* =====================================================
   SUCCESS STATE
   ===================================================== */

.premium-success {
    text-align: center;
    padding: 40px 20px;
    font-size: 18px;
    font-weight: 600;
    animation: fadeInUp .4s ease forwards;
}

/* =====================================================
   MOBILE OPTIMIZATION
   ===================================================== */

@media (max-width: 768px) {

    .premium-inner {
        width: 90vw;
        padding: 28px;
    }

    .premium-box.slider-left,
    .premium-box.slider-right {
        top: auto;
        bottom: 0;
        transform: translateY(100%);
        width: 100%;
    }

    .premium-box.slider-left.visible,
    .premium-box.slider-right.visible {
        transform: translateY(0);
    }

    .premium-box.spotlight {
        right: 50%;
        transform: translateX(50%) scale(.9);
    }

    .premium-box.spotlight.visible {
        transform: translateX(50%) scale(1);
    }
}

/* =====================================================
   ANIMATIONS
   ===================================================== */

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}