:root {
    --bg-color: #0f172a;
    /* Dark Blue Slate */
    --text-color: #f1f5f9;
    /* Slate 100 */
    --primary-color: #38bdf8;
    /* Sky 400 */
    --secondary-color: #818cf8;
    /* Indigo 400 */
    --accent-color: #22d3ee;
    /* Cyan 400 */
    --highlight-bg: rgba(56, 189, 248, 0.1);
    --glass-bg: rgba(15, 23, 42, 0.7);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    /* Hide scrollbars for presentation mode */
    height: 100vh;
    width: 100vw;
}

.slides-container {
    position: relative;
    height: 100%;
    width: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease-in-out, transform 0.6s ease-in-out;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* Default center, can be overridden */
    padding: 4rem 8rem;
    background: radial-gradient(circle at center, #1e293b 0%, var(--bg-color) 100%);
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 10;
}

/* Typography */
h1 {
    font-size: 5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

h2 {
    font-size: 3.5rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

p,
li {
    font-size: 1.8rem;
    line-height: 1.6;
    color: #cbd5e1;
}

ul {
    list-style: none;
    text-align: left;
    max-width: 800px;
}

li {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
    position: relative;
}

li::before {
    content: "•";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
    font-size: 2rem;
    line-height: 1.6rem;
}

strong {
    color: var(--accent-color);
}

.subtitle {
    font-size: 2.5rem;
    color: #94a3b8;
    font-weight: 300;
}

.note {
    font-size: 1.5rem;
    color: #64748b;
    font-style: italic;
    margin-top: 1rem;
}

.presenter-info {
    margin-top: 3rem;
    text-align: center;
}

.presenter-info p {
    font-size: 1.5rem;
    color: #94a3b8;
}

.presenter-info .collab {
    margin-top: 1rem;
    color: var(--secondary-color);
    font-weight: 600;
}

/* Layout Helpers */
.content-center {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.split-content {
    display: flex;
    gap: 4rem;
    width: 100%;
    max-width: 1200px;
    justify-content: center;
}

.box {
    flex: 1;
    background: var(--highlight-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid rgba(56, 189, 248, 0.2);
    text-align: center;
}

.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s;
}

.glass-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.definition-text {
    font-size: 2.5rem;
    max-width: 1000px;
    line-height: 1.4;
}

/* Flow Diagram */
.flow-diagram {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.step {
    background: var(--secondary-color);
    color: #fff;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1.5rem;
}

.arrow {
    font-size: 2rem;
    color: var(--primary-color);
}

/* Table */
table {
    width: 100%;
    max-width: 1000px;
    border-collapse: collapse;
    font-size: 1.5rem;
    margin-top: 2rem;
}

th,
td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

th {
    color: var(--primary-color);
    font-weight: 600;
    border-bottom: 2px solid var(--primary-color);
}

/* Mindset List */
.mindset-list p {
    font-size: 3rem;
    font-weight: 700;
    margin: 1rem 0;
    color: var(--text-color);
}

.highlight {
    margin-top: 3rem;
    background: linear-gradient(to right, var(--accent-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* QR Code */
.qr-container {
    margin-top: 2rem;
    padding: 1rem;
    background: #fff;
    border-radius: 10px;
    display: inline-block;
}

.qr-code {
    width: 200px;
    height: 200px;
    display: block;
}

.qr-container.large .qr-code {
    width: 400px;
    height: 400px;
}

.link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.link:hover {
    text-decoration: underline;
}

/* Announcement Styles */
.big-announcement {
    font-size: 6rem;
    margin-bottom: 2rem;
}

.highlight-box {
    background: var(--primary-color);
    color: #0f172a;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-weight: 700;
    margin-top: 2rem;
    display: inline-block;
}

/* Controls */
.controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 20px;
    z-index: 100;
    background: rgba(15, 23, 42, 0.8);
    padding: 10px 20px;
    border-radius: 30px;
    backdrop-filter: blur(5px);
}

button {
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px 10px;
    transition: color 0.3s;
}

button:hover {
    color: var(--primary-color);
}

.progress-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .slide {
        padding: 2rem 1rem;
        overflow-y: auto;
        /* Allow scrolling if content is too long */
        justify-content: flex-start;
        /* Start from top on mobile */
    }

    h1 {
        font-size: 3rem;
    }

    h2 {
        font-size: 2rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    p,
    li,
    .definition-text,
    .mindset-list p {
        font-size: 1.2rem;
    }

    .split-content {
        flex-direction: column;
        gap: 2rem;
    }

    .flow-diagram {
        flex-direction: column;
    }

    .arrow {
        transform: rotate(90deg);
        /* Point down */
        margin: 0.5rem 0;
    }

    .qr-container.large .qr-code {
        width: 250px;
        height: 250px;
    }

    .big-announcement {
        font-size: 3.5rem;
    }

    .controls {
        bottom: 10px;
        padding: 5px 15px;
    }

    .progress-bar {
        width: 100px;
    }

    /* Hide presenter info on small screens if needed, or adjust */
    .presenter-info {
        margin-top: 2rem;
    }
}