/* ===========================
   Futuristic Silver Feature Cards
   Fully Responsive
   =========================== */

/* Variables for easy tuning */
:root {
    --fg: #e6eef9;
    --muted: #b7c2cf;
    --silver-1: #f6f8fa;
    --silver-2: #e7eaee;
    --metal-accent: linear-gradient(135deg, #d7e0ea 0%, #e9edf2 45%, #cfd6dd 100%);
    --glow-accent: rgba(67, 137, 255, 0.12);
    --neon: #2b8cff;
    --card-radius: 14px;
}

/* ===========================
   Features Grid - Responsive
   =========================== */
.features-grid.futuristic {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(18px, 3vw, 24px);
    padding: clamp(12px, 2vw, 16px) 0;
}

/* ===========================
   Feature Card Base
   =========================== */
.feature-card.futuristic {
    position: relative;
    overflow: visible;
    background: var(--metal-accent);
    border-radius: var(--card-radius);
    padding: clamp(20px, 4vw, 26px);
    min-height: clamp(180px, 25vw, 220px);
    display: flex;
    flex-direction: column;
    gap: clamp(10px, 2vw, 14px);
    box-shadow:
        0 10px 30px rgba(6, 12, 30, 0.10),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        inset 0 -8px 20px rgba(15, 23, 42, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.45);
    transition: transform 280ms cubic-bezier(0.2, 0.9, 0.2, 1), 
                box-shadow 280ms ease;
    backdrop-filter: blur(6px) saturate(120%);
    -webkit-backdrop-filter: blur(6px) saturate(120%);
    color: #0f1724;
}

/* Metallic sheen pseudo element */
.feature-card.futuristic::before {
    content: "";
    position: absolute;
    left: -30%;
    top: -40%;
    width: 160%;
    height: 120%;
    background: linear-gradient(
        120deg,
        rgba(255, 255, 255, 0.30) 0%,
        rgba(255, 255, 255, 0.06) 45%,
        rgba(255, 255, 255, 0.0) 60%
    );
    transform: rotate(-18deg);
    pointer-events: none;
    filter: blur(8px);
    mix-blend-mode: screen;
    opacity: 0.95;
    border-radius: inherit;
}

/* Subtle bottom reflection */
.feature-card.futuristic::after {
    content: "";
    position: absolute;
    left: 6%;
    right: 6%;
    bottom: -10px;
    height: 14px;
    background: radial-gradient(
        ellipse at center,
        rgba(20, 30, 60, 0.08),
        rgba(20, 30, 60, 0.00) 60%
    );
    filter: blur(6px);
    border-radius: 50%;
    pointer-events: none;
}

/* ===========================
   Feature Icon
   =========================== */
.feature-icon {
    width: clamp(60px, 10vw, 72px);
    height: clamp(60px, 10vw, 72px);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    border-radius: clamp(10px, 2vw, 12px);
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.65),
        rgba(255, 255, 255, 0.12)
    );
    box-shadow: 0 6px 18px rgba(43, 140, 255, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: transform 280ms cubic-bezier(0.2, 0.9, 0.2, 1),
        box-shadow 280ms ease;
    flex-shrink: 0;
}

/* Make SVGs/images fit nicely */
.feature-icon img,
.feature-icon svg {
    width: clamp(44px, 8vw, 52px);
    height: clamp(44px, 8vw, 52px);
    display: block;
    filter: drop-shadow(0 6px 18px rgba(43, 140, 255, 0.06));
}

/* ===========================
   Card Content
   =========================== */
.feature-card.futuristic h3 {
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    margin: 0;
    color: #071233;
    font-weight: 700;
    letter-spacing: 0.1px;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.55);
    line-height: 1.3;
}

.feature-card.futuristic p {
    color: #374152;
    margin: 0;
    line-height: 1.5;
    font-size: clamp(0.875rem, 2vw, 0.95rem);
    flex: 1;
}

/* ===========================
   Hover Effects
   =========================== */
.feature-card.futuristic:hover {
    transform: translateY(-10px);
    box-shadow:
        0 28px 60px rgba(6, 12, 30, 0.18),
        inset 0 1px 0 rgba(255, 255, 255, 0.62);
}

.feature-card.futuristic:hover .feature-icon {
    transform: translateY(-6px) rotate(-1deg);
    box-shadow: 0 18px 40px rgba(43, 140, 255, 0.14),
        inset 0 1px 0 rgba(255, 255, 255, 0.72);
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.75),
        rgba(255, 255, 255, 0.10)
    );
}

/* ===========================
   Left Glow Strip
   =========================== */
.feature-card.futuristic .left-glow {
    position: absolute;
    left: 0;
    top: 8%;
    bottom: 8%;
    width: clamp(4px, 1vw, 6px);
    background: linear-gradient(
        180deg,
        rgba(43, 140, 255, 0.92),
        rgba(155, 92, 255, 0.35)
    );
    border-top-left-radius: var(--card-radius);
    border-bottom-left-radius: var(--card-radius);
    opacity: 0;
    box-shadow: 0 8px 24px rgba(43, 140, 255, 0.08);
    pointer-events: none;
    transition: opacity 280ms ease, transform 280ms ease;
}

.feature-card.futuristic:hover .left-glow {
    transform: scaleY(1.06);
    opacity: 0.9;
}

/* ===========================
   Accessibility
   =========================== */
.feature-card.futuristic:focus-within,
.feature-card.futuristic:focus {
    outline: 3px solid rgba(43, 140, 255, 0.3);
    outline-offset: 4px;
}

/* ===========================
   Tablet Responsive (max-width: 1024px)
   =========================== */
@media (max-width: 1024px) {
    .features-grid.futuristic {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 20px;
    }

    .feature-card.futuristic {
        padding: 22px;
        min-height: 190px;
    }
}

/* ===========================
   Mobile Responsive (max-width: 768px)
   =========================== */
@media (max-width: 768px) {
    .features-grid.futuristic {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 18px;
    }

    .feature-card.futuristic {
        padding: 20px;
        min-height: 170px;
        border-radius: 12px;
    }

    .feature-icon {
        width: 64px;
        height: 64px;
        border-radius: 10px;
    }

    .feature-icon img,
    .feature-icon svg {
        width: 48px;
        height: 48px;
    }

    .feature-card.futuristic h3 {
        font-size: 1.05rem;
    }

    .feature-card.futuristic p {
        font-size: 0.9rem;
    }
}

/* ===========================
   Small Mobile (max-width: 640px)
   =========================== */
@media (max-width: 640px) {
    .features-grid.futuristic {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 8px 0;
    }

    .feature-card.futuristic {
        padding: 18px;
        min-height: 160px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
    }

    .feature-icon img,
    .feature-icon svg {
        width: 44px;
        height: 44px;
    }

    .feature-card.futuristic h3 {
        font-size: 1rem;
    }

    .feature-card.futuristic p {
        font-size: 0.875rem;
        line-height: 1.5;
    }
}

/* ===========================
   Extra Small Mobile (max-width: 480px)
   =========================== */
@media (max-width: 480px) {
    .feature-card.futuristic {
        padding: 16px;
        min-height: 150px;
        gap: 10px;
    }

    .feature-icon {
        width: 56px;
        height: 56px;
        border-radius: 8px;
    }

    .feature-icon img,
    .feature-icon svg {
        width: 40px;
        height: 40px;
    }

    .feature-card.futuristic h3 {
        font-size: 0.95rem;
        line-height: 1.25;
    }

    .feature-card.futuristic p {
        font-size: 0.85rem;
    }

    .feature-card.futuristic:hover {
        transform: translateY(-6px);
    }

    .feature-card.futuristic:hover .feature-icon {
        transform: translateY(-4px) rotate(-1deg);
    }
}

/* ===========================
   Extra Small Mobile (max-width: 360px)
   =========================== */
@media (max-width: 360px) {
    .features-grid.futuristic {
        gap: 14px;
    }

    .feature-card.futuristic {
        padding: 14px;
        min-height: 140px;
    }

    .feature-icon {
        width: 52px;
        height: 52px;
    }

    .feature-icon img,
    .feature-icon svg {
        width: 36px;
        height: 36px;
    }

    .feature-card.futuristic h3 {
        font-size: 0.9rem;
    }

    .feature-card.futuristic p {
        font-size: 0.813rem;
    }
}

/* ===========================
   Large Desktop (min-width: 1440px)
   =========================== */
@media (min-width: 1440px) {
    .features-grid.futuristic {
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }

    .feature-card.futuristic {
        padding: 28px;
        min-height: 230px;
    }

    .feature-icon {
        width: 76px;
        height: 76px;
    }

    .feature-icon img,
    .feature-icon svg {
        width: 56px;
        height: 56px;
    }

    .feature-card.futuristic h3 {
        font-size: 1.15rem;
    }

    .feature-card.futuristic p {
        font-size: 1rem;
    }
}

/* ===========================
   Touch Device Optimizations
   =========================== */
@media (hover: none) and (pointer: coarse) {
    .feature-card.futuristic {
        /* Make cards more touch-friendly */
        min-height: 180px;
    }

    .feature-card.futuristic:active {
        transform: scale(0.98);
    }

    /* Remove hover effects on touch devices */
    .feature-card.futuristic:hover {
        transform: none;
        box-shadow:
            0 10px 30px rgba(6, 12, 30, 0.10),
            inset 0 1px 0 rgba(255, 255, 255, 0.6),
            inset 0 -8px 20px rgba(15, 23, 42, 0.03);
    }

    .feature-card.futuristic:hover .feature-icon {
        transform: none;
    }

    .feature-card.futuristic:hover .left-glow {
        opacity: 0;
    }
}

/* ===========================
   Reduced Motion
   =========================== */
@media (prefers-reduced-motion: reduce) {
    .feature-card.futuristic,
    .feature-icon,
    .left-glow {
        transition: none;
    }

    .feature-card.futuristic:hover {
        transform: none;
    }

    .feature-card.futuristic:hover .feature-icon {
        transform: none;
    }

    .feature-card.futuristic:hover .left-glow {
        transform: none;
    }
}

/* ===========================
   High Contrast Mode
   =========================== */
@media (prefers-contrast: high) {
    .feature-card.futuristic {
        border: 2px solid #000;
        background: #fff;
    }

    .feature-card.futuristic h3 {
        color: #000;
        text-shadow: none;
    }

    .feature-card.futuristic p {
        color: #333;
    }

    .feature-icon {
        border: 2px solid #000;
        background: #f0f0f0;
    }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    .features-grid.futuristic {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card.futuristic {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
        background: #fff;
    }

    .feature-card.futuristic::before,
    .feature-card.futuristic::after,
    .left-glow {
        display: none;
    }
}