[data-theme="light"] {
    --color-bg: linear-gradient(
        to bottom right,
        #eff6ff,   /* from-blue-50 */
        #ffffff,   /* via-white */
        #eef2ff    /* to-indigo-50 */
    );
    --color-fg: #000000;

    --theme-btn-bg-color: #1f2937;
    --theme-btn-hover-bg-color: #374151;
    --theme-btn-fg-color: #ffffff;

    --quote-card-bg-color: rgba(255, 255, 255, 0.9);
    --quote-card-border: 1px solid #e5e7eb;
    --quote-content-color: #1f2937;
    --quote-author-color: #2563eb;

    --new-quote-hover-bg-color: #1d4ed8;
    --copy-quote-hover-bg-color: #047857;

    --footer-fg-color: #4b5563;
 }
 
 [data-theme="dark"] {
    --color-bg: linear-gradient(
        to bottom right,
        #111827,  /* from-gray-900 */
        #1e3a8a,  /* via-blue-900 */
        #1f2937   /* to-gray-800 */
      );
    --color-fg: #ffffff;

    --theme-btn-bg-color: #f59e0b;
    --theme-btn-hover-bg-color: #fbbf24;
    --theme-btn-fg-color: #111827;

    --quote-card-bg-color: rgba(31, 41, 55, 0.9);
    --quote-card-border: 1px solid #374151;
    --quote-content-color: #f3f4f6;
    --quote-author-color: #60a5fa;
    
    --new-quote-hover-bg-color: #3b82f6;
    --copy-quote-hover-bg-color: #10b981;

    --footer-fg-color: #9ca3af;
 }

body {
    padding: 2rem 1.3rem;
    background: var(--color-bg);
    color: var(--color-fg);
}

header {
    margin: 1rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .title {
    font-size: 2rem;
    margin: 0;
}

header .theme_toggle_btn {
    background-color: var(--theme-btn-bg-color);
    color: var(--theme-btn-fg-color);
    padding: .6rem;
    border: none;
    outline: none;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

header .theme_toggle_btn:hover {
    transform: scale(1.1);
    background-color: var(--theme-btn-hover-bg-color);
}

.quote-card {
    margin: 2rem 0;
    padding: 2rem;
    background-color: var(--quote-card-bg-color);
    backdrop-filter: blur(4px);
    border: var(--quote-card-border);
    transition: transform 0.2s ease;
}

.quote-card:hover {
    transform: none;
}

.quote-card .quote {
    margin-bottom: 2rem;
}

.quote-card .quote .content {
    font-size: 1.4rem;
    color: var(--quote-content-color);
}

.quote-card .quote .author {
    font-size: 1.3rem;
    font-style: italic;
    color: var(--quote-author-color);
}

.quote-card .action {
    display: flex;
    flex-direction: column;
}

.quote-card .action .action-btn {
    width: 100%;
    padding: 1.2rem;
    font-size: 1.2rem;
    font-weight: bold;
    border: none;
    outline: none;
    margin-bottom: 1rem;
    border-radius: 1rem;
    color: white;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

.quote-card .action .action-btn:disabled {
    opacity: 0.5;
}

.quote-card .action .action-btn:hover {
    transform: none;
}

.quote-card .action .action-btn p {
    margin: 0;
    margin-left: .5rem;
}

.quote-card .action .new-quote-btn {
    background-color: #2563eb;
}

.quote-card .action .new-quote-btn:hover {
    background-color: var(--new-quote-hover-bg-color);
}

.quote-card .action .new-quote-btn .new-quote-btn-icon {
    transition: transform 0.3s ease;
}

.quote-card .action .new-quote-btn:hover .new-quote-btn-icon {
    transform: none;
}

.quote-card .action .new-quote-btn .new-quote-btn-icon.spin {
    animation: spin 0.5s linear infinite;
}

.quote-card .action .copy-quote-btn {
    background-color: #059669;
}

.quote-card .action .copy-quote-btn .copy-quote-btn-icon {
    transition: transform 0.3s ease;
}

.quote-card .action .copy-quote-btn:hover {
    background-color: var(--copy-quote-hover-bg-color);
}

.quote-card .action .copy-quote-btn:hover .copy-quote-btn-icon {
    transform: none;
}

.bound {
    animation: bounce 0.5s infinite;
}

footer {
    text-align: center;
    color: var(--footer-fg-color);
}

@keyframes spin {
    to {
      transform: rotate(360deg);
    }
}

@keyframes bounce {
    0%, 100% {
      transform: translateY(-25%);
      animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }
    50% {
      transform: translateY(0);
      animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
  }

@media (min-width: 768px) { 
    body {
        padding: 2.6rem 10rem;
    }

    .quote-card .action{
        width: 50%;
        margin: auto;
        flex-direction: row;
        justify-content: center;
        align-items: center;
    }

    .quote-card .action .action-btn {
        width: 50%;
        margin-right: 1rem;
        padding: 1.1rem;
        font-size: 1.1rem;
    }

    .quote-card:hover {
        transform: scale(1.02);
    }

    .quote-card .action .action-btn:hover {
        transform: scale(1.05);
    }

    .quote-card .action .new-quote-btn:hover .new-quote-btn-icon {
        transform: scale(1.1) rotate(180deg);
    }

    .quote-card .action .copy-quote-btn:hover .copy-quote-btn-icon {
        transform: scale(1.1);
    }
}