:root {
    /* LearnerConnect: Logo-Synced Design Tokens */
    --bg-page: #F5F7FA;
    --bg-slide: #ffffff;
    --bg-muted: #f4f4f5;

    /* Logo Colors */
    --accent: #0B4F6C;
    /* "Learner" - Deep Navy/Teal */
    --accent-light: #01BAEF;
    /* "Connect" - Bright Cyan */
    --accent-secondary: #F46036;
    /* Icon Dots - Orange/Coral */

    --teal: #01BAEF;
    /* Synced with accent-light */
    --accent-bg: rgba(1, 186, 239, 0.08);
    /* Light Cyan Background */

    --text-primary: #1C2321;
    --text-secondary: #525252;
    --text-muted: #a3a3a3;

    --border: #e5e5e5;
    --border-focus: #0B4F6C;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 12px 40px rgba(11, 79, 108, 0.08);
    /* Tinted shadow */

    --radius-xl: 20px;
    --radius-lg: 14px;
    --radius-md: 10px;

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background: var(--bg-page);
    color: var(--text-primary);
    height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    /* Prevent scroll on laptop view */
    -webkit-font-smoothing: antialiased;
}

/* Base Slide Container */
.slide {
    width: 95vw;
    height: calc(95vw * (9/16));
    /* Maintain 16:9 ratio */
    max-width: 1440px;
    max-height: calc(1440px * (9/16));

    /* Fallback if height limited */
    @media (min-aspect-ratio: 16/9) {
        height: 90vh;
        width: calc(90vh * (16/9));
    }

    background: var(--bg-slide);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 4vh 4vw;
    /* Responsive padding */
    height: 100%;
}

/* Global Navigation/Footer */
.global-footer {
    margin-top: auto;
    padding: 24px 64px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-slide);
    position: relative;
    z-index: 100;
}

.footer-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-controls {
    display: flex;
    justify-content: space-between;
    width: 100%;
    padding: 0 2vw;
    /* Side padding */
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    z-index: 1000;
    pointer-events: none;
    /* Let clicks pass through empty space */
}

.nav-btn {
    pointer-events: auto;
    /* Re-enable clicks on buttons */
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.5);
    /* Subtle border */
    background: rgba(255, 255, 255, 0.3);
    /* Transparent Glass */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: grid;
    place-items: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    /* Softer shadow */
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--accent);
    color: var(--accent);
    transform: scale(1.05);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.nav-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.footer-meta {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    gap: 24px;
}

.slide-number {
    color: var(--accent);
    font-weight: 600;
}

/* Shared Typography & Layout Defaults (Added for Standardization) */
.slide-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 24px;
    width: 100%;
    text-align: center;
}

.slide-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.2;
}

.slide-header .subtitle {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.5;
    max-width: 800px;
    margin: 0;
}

/* Common Components */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: var(--accent-bg);
    color: var(--accent);
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}