/* PTransfer Premium Design System */
:root {
    --ptransfer-glow: rgba(0, 174, 255, 0.4);
    --ptransfer-primary: #00AEFF;
    --ptransfer-secondary: #0066FF;
    --ptransfer-bg-dark: #0f172a;
    --ptransfer-card-bg: rgba(30, 41, 59, 0.7);
}

.ptransfer-container {
    padding: 2rem;
    width: 100%;
    margin: 0 auto;
    max-width: 1200px;
    color: #fff;
    min-height: calc(100vh - 80px);
}

/* Header */
.ptransfer-header {
    margin-bottom: 3rem;
    position: relative;
}

.ptransfer-title {
    font-size: 25.6px;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 15px;
    color: #fff;
}

.title-icon {
    background: var(--pintor-btn-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ptransfer-subtitle {
    color: #ffffff;
    font-size: 1rem;
    margin-top: 4px;
}

/* Device Hub */
.device-hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    margin-top: 2rem;
}

.device-card {
    background: rgba(30, 30, 35, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    backdrop-filter: blur(10px);
    transition: transform 0.2s, background 0.2s;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.device-card:hover {
    transform: translateY(-2px);
    background: rgba(30, 30, 35, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

.device-card.active::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--ptransfer-primary);
    border-radius: 20px;
    animation: lightning-pulse 2s infinite;
}

@keyframes lightning-pulse {
    0% { opacity: 0.3; box-shadow: 0 0 5px var(--ptransfer-primary); }
    50% { opacity: 1; box-shadow: 0 0 20px var(--ptransfer-primary); }
    100% { opacity: 0.3; box-shadow: 0 0 5px var(--ptransfer-primary); }
}

.device-icon-wrapper {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0;
    font-size: 1.3rem;
    color: #fff;
    transition: transform 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
    flex-shrink: 0;
}

.device-card:hover .device-icon-wrapper {
    transform: scale(1.1) rotate(-5deg);
    background: linear-gradient(135deg, var(--ptransfer-primary), var(--ptransfer-secondary));
    color: #fff;
}

.device-icon-wrapper img {
    width: 24px;
    height: 24px;
    filter: invert(1);
    transition: filter 0.3s ease;
}

.device-card:hover .device-icon-wrapper img {
    filter: invert(0);
}

.device-info h3 {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.device-status {
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
    color: #ffffff;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #475569;
}

.status-dot.online {
    background: #00AEFF;
    box-shadow: 0 0 8px #00AEFF;
}

/* Drop Zone */
.transfer-zone {
    background: transparent;
    border: 2px dashed rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.transfer-zone:hover {
    border-color: rgba(0, 174, 255, 0.5);
    background: rgba(0, 174, 255, 0.03);
    transform: translateY(-2px);
}

.transfer-zone.drag-over {
    border-color: #00AEFF;
    background: rgba(0, 174, 255, 0.1);
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(0, 174, 255, 0.3);
}

.transfer-zone .bolt-icon {
    font-size: 2.5rem;
    color: var(--ptransfer-primary);
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 10px var(--ptransfer-primary));
    animation: bolt-float 3s ease-in-out infinite;
}

@keyframes bolt-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.transfer-zone h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.transfer-zone p {
    color: #ffffff;
    font-size: 0.9rem;
    max-width: 450px;
    margin: 0 auto 1.5rem;
}

.btn-transfer {
    background: linear-gradient(135deg, var(--ptransfer-primary), var(--ptransfer-secondary));
    color: #fff;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 174, 255, 0.3);
}

.btn-transfer:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 174, 255, 0.5);
}

/* Abstract Dot Overlay */
.lightning-effect {
    position: absolute;
    pointer-events: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
    opacity: 0.1;
    background-image: radial-gradient(circle at 50% 50%, var(--ptransfer-primary) 0.5px, transparent 1px);
    background-size: 30px 30px;
}

/* Empty Active Devices */
.empty-devices {
    text-align: center;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: #ffffff;
}

/* ── Section Heading ── */
.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ── Pair Section ── */
.pair-section {
    margin-top: 3rem;
}

.pair-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.pair-card {
    background: rgba(30, 30, 35, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}

.pair-card-qr {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.pair-card-link {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.qr-box {
    background: #fff;
    padding: 10px;
    border-radius: 12px;
    width: 130px;
    height: 130px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.pair-card-title {
    font-weight: 700;
    font-size: 1rem;
    color: #fff;
    margin-bottom: 0.5rem;
}

.pair-card-desc {
    font-size: 0.85rem;
    color: #ffffff;
    margin: 0;
}

.share-link-row {
    display: flex;
    gap: 10px;
}

.share-link-input {
    flex: 1;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    color: #ffffff;
    font-size: 0.85rem;
    min-width: 0;
}

.btn-copy {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
    font-size: 0.85rem;
}

.btn-copy:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* ── Mobile Responsive ── */
@media (max-width: 768px) {
    .ptransfer-container {
        padding: 1rem;
        min-height: unset;
        padding-bottom: 12rem;
    }

    /* Header */
    .ptransfer-header {
        margin-bottom: 1.5rem;
    }

    .ptransfer-title {
        font-size: 1.2rem;
        gap: 10px;
    }

    .ptransfer-subtitle {
        font-size: 0.85rem;
    }

    /* Devices section heading */
    .section-heading {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 6px;
    }

    /* Device grid — stack vertically on mobile */
    .device-hub-grid {
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        margin-bottom: 1.5rem;
        margin-top: 1rem;
    }

    .device-card {
        width: 100%;
        padding: 0.85rem 1rem;
        border-radius: 12px;
    }

    .device-icon-wrapper {
        width: 36px;
        height: 36px;
        font-size: 1rem;
        border-radius: 10px;
    }

    .device-info h3 {
        font-size: 0.85rem;
    }

    .device-status {
        font-size: 0.75rem;
    }

    /* Transfer zone */
    .transfer-zone {
        border-radius: 12px;
        padding: 0.75rem 1rem !important;
    }

    .transfer-zone .bolt-icon {
        font-size: 1.8rem;
    }

    /* Pair section */
    .pair-section {
        margin-top: 1.5rem;
    }

    .pair-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .pair-card-qr {
        flex-direction: row;
        gap: 1rem;
    }

    .qr-box {
        width: 100px;
        height: 100px;
    }

    .pair-card {
        padding: 1.25rem;
        border-radius: 12px;
    }

    .pair-card-title {
        font-size: 0.95rem;
    }

    .share-link-input {
        font-size: 0.8rem;
        padding: 0.45rem 0.6rem;
    }

    .btn-copy {
        padding: 0.45rem 0.85rem;
        font-size: 0.82rem;
    }
}

@media (max-width: 480px) {
    .ptransfer-container {
        padding: 0.75rem;
    }

    .ptransfer-title {
        font-size: 1.1rem;
    }

    .device-card {
        width: 100%;
        padding: 0.75rem;
    }

    .pair-card-qr {
        gap: 0.85rem;
    }

    .qr-box {
        width: 90px;
        height: 90px;
        padding: 8px;
    }
}