:root {
    --bg-color: #121215;
    --card-bg: rgba(40, 40, 45, 0.35);
    --card-bg-hover: rgba(50, 50, 55, 0.5);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-hover: rgba(255, 255, 255, 0.15);
    --accent-color: rgba(110, 170, 255, 0.85);
    --text-color: rgba(255, 255, 255, 0.9);
    --text-hover: rgba(255, 255, 255, 1);
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    --card-radius: 12px;
    --delete-button-bg: rgba(40, 40, 40, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
    "Helvetica Neue", sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    margin: 0 auto;
    min-height: 100vh;
    background-color: var(--bg-color);
    overflow-x: hidden;
    perspective: 1000px;
    position: relative;
}

/* Header styling */
header {
    text-align: center;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.logo {
    font-size: 2.3rem;
    font-weight: 600;
    letter-spacing: 1px;
    display: inline-block;
    color: var(--text-color);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: relative;
}

.logo::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 25%;
    width: 50%;
    height: 1px;
    background: linear-gradient(
            90deg,
            transparent,
            var(--accent-color),
            transparent
    );
}

/* Two column grid for links; always two columns */
.links-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    position: relative;
    z-index: 1;
    perspective: 2000px;
    max-width: 600px;
    margin: auto;
    width: 100%;
    visibility: hidden;
}

.link-card {
    background-color: var(--card-bg);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: all 0.2s ease;
    overflow: visible; /* Allow delete button to extend outside */
    text-align: center;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--card-border);
    transform-style: preserve-3d;
    position: relative;
}

.link-card:hover {
    background-color: var(--card-bg-hover);
    border-color: var(--card-border-hover);
}

.link-card a {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 20px;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    letter-spacing: 0.3px;
    position: relative;
    z-index: 2;
    transition: color 0.3s ease;
    height: 100%;
}

.link-card:hover a {
    color: var(--text-hover);
}

/* Subtle top gradient on cards */
.link-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
            90deg,
            transparent,
            rgba(255, 255, 255, 0.1),
            transparent
    );
}

/* Responsive adjustments for spacing and font sizes while keeping two columns */
@media (max-width: 768px) {
    .links-container {
        gap: 16px;
    }

    .link-card a {
        padding: 14px 16px;
        font-size: 0.95rem;
    }

    header .logo {
        font-size: 2rem;
    }

    body {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .links-container {
        gap: 12px;
    }

    .link-card a {
        padding: 12px;
        font-size: 0.9rem;
    }

    header .logo {
        font-size: 1.8rem;
    }
}

/* Controls styling */
.controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.footer-controls {
    margin-top: 30px;
}

.edit-mode-controls {
    flex-direction: column;
    align-items: center;
}

.control-button {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--card-border);
    border-radius: var(--card-radius);
    padding: 8px 12px;
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
}

.control-button:hover {
    background-color: var(--card-bg-hover);
    border-color: var(--card-border-hover);
}

.control-button.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Hidden links section */
.hidden-links-container {
    margin-top: 20px;
    text-align: center;
}

.hidden-links-toggle {
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    text-decoration: underline;
    opacity: 0.8;
}

.hidden-links-list {
    display: none;
    margin-top: 10px;
    position: relative;
}

.hidden-links-list.visible {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 600px;
    margin: 10px auto 0;
    width: 100%;
}

/* Restore link styled as a card */
.restore-link {
    background-color: var(--card-bg);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: all 0.2s ease;
    overflow: visible;
    text-align: center;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--card-border);
    transform-style: preserve-3d;
    position: relative;
    padding: 16px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    font-weight: 500;
    letter-spacing: 0.3px;
}

.restore-link:hover {
    background-color: var(--card-bg-hover);
    border-color: var(--card-border-hover);
    color: var(--text-hover);
}

/* Subtle top gradient on restore links */
.restore-link::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(
            90deg,
            transparent,
            rgba(255, 255, 255, 0.1),
            transparent
    );
}

.no-hidden-message {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: var(--card-radius);
    border: 1px solid var(--card-border);
    grid-column: 1 / span 2; /* Span both columns in the grid */
    margin: 0 auto;
    width: 100%;
    max-width: 600px;
}

.dismiss-button {
    margin-left: 10px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    font-size: 16px;
}

.dismiss-button:hover {
    color: rgba(255, 255, 255, 0.9);
}

/* Drag and drop styles */
.link-card {
    position: relative;
    cursor: default;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    user-select: none;
}

.edit-mode .link-card {
    cursor: grab;
    will-change: transform;
}

/* Prevent links from being clickable in edit mode */
.edit-mode .link-card a {
    pointer-events: none;
}

/* Card number indicator for edit mode */
.card-number {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 8px;
    color: var(--text-color);
    display: none;
    font-size: 13px;
    font-weight: bold;
    z-index: 3;
}

.edit-mode .card-number {
    display: block;
}

/* iOS-style delete button in top-left */
.hide-button {
    position: absolute;
    top: -10px;
    left: -10px;
    width: 22px;
    height: 22px;
    background-color: var(--delete-button-bg);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 100; /* Higher z-index to ensure it's on top */
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    transform: scale(0.9);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.edit-mode .hide-button,
.restore-link .hide-button {
    display: flex;
    opacity: 1;
    transform: scale(1);
    pointer-events: auto; /* Ensure it's clickable */
}

.hide-button:hover,
.hide-button:active {
    transform: scale(1.1);
    background-color: var(--delete-button-bg);
}

/* Replace the text inside with a minus sign for iOS style */
.hide-button::before {
    content: "-";
    font-weight: bold;
    font-size: 20px;
    line-height: 0;
    position: relative;
    top: -1px;
}

/* Use a plus sign for hidden links section to match regular section */
.hidden-links-list .hide-button::before {
    content: "+";
}

/* Drag indicator on the right side of cards in edit mode */
.drag-handle {
    position: absolute;
    top: 50%;
    right: 8px;
    transform: translateY(-50%);
    color: var(--text-color);
    font-size: 16px;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    cursor: grab;
    display: none;
    z-index: 3;
}

.edit-mode .drag-handle {
    display: block;
    opacity: 0.7;
}

.edit-mode .drag-handle:hover {
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}


.hidden-link {
    display: none;
}


/* Drop indicator styling */
.drop-indicator {
    position: absolute;
    background-color: rgba(110, 170, 255, 0.1);
    border: 2px dashed var(--accent-color);
    border-radius: var(--card-radius);
    z-index: 1;
    opacity: 0.8;
    pointer-events: none;
}

/* Ghost element styling */
.dragging-ghost {
    position: fixed !important;
    z-index: 1000 !important;
    pointer-events: none !important;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3) !important;
    background-color: var(--card-bg-hover) !important;
    border-color: var(--accent-color) !important;
}