/* style.css */
/* Combined styles for layout, theme, slides, toggles, and effects */

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

/* --- Theme Variables --- */
:root {
	/* Light Mode Colors */
	--bg-color: #f8f8f8;
	--text-color: #333333; /* Dark text for light mode */
	--nav-bg: #e0e0e0;
	--nav-icon-color: #555555;
	--link-hover-bg: #cccccc;
	--cta-bg: var(--nav-icon-color);
	--cta-text: var(--nav-bg); /* Light text for dark button in light mode */
	--slide-button-bg: rgba(0, 0, 0, 0.3);
	--slide-button-hover-bg: rgba(0, 0, 0, 0.6);
	--slide-button-text: white;

    /* --- Hero Gradient Colors (Light Mode - Slightly Brighter/Different Palette) --- */
    --hero-grad-1: hsl(280, 48%, 74%); /* Muted Violet */
    --hero-grad-2: hsl(240, 47%, 79%); /* Muted Blue */
    --hero-grad-3: hsl(180, 40%, 78%); /* Muted Cyan */
    --hero-grad-4: hsl(120, 47%, 79%); /* Muted Green */
    --hero-grad-5: hsl(60, 46%, 84%);  /* Muted Yellow */
    --hero-grad-6: hsl(20, 53%, 84%);  /* Muted Orange */

	--hero-text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5); /* Shadow for light mode */
	--hero-cta-bg: hsla(
		0,
		0%,
		20%,
		0.7
	); /* Darker semi-transparent btn for light mode */
	--hero-cta-text: white; /* Light text on btn */
	--hero-cta-hover-bg: hsla(0, 0%, 10%, 0.8);
}

html.dark {
	/* Dark Mode Colors */
	--bg-color: #1a1a1a;
	--text-color: #e0e0e0; /* Light text for dark mode */
	--nav-bg: #2c2c2c;
	--nav-icon-color: #b0b0b0;
	--link-hover-bg: #444444;
	--cta-bg: var(--nav-icon-color);
	--cta-text: var(--nav-bg); /* Dark text for light button in dark mode */
	--slide-button-bg: rgba(255, 255, 255, 0.2);
	--slide-button-hover-bg: rgba(255, 255, 255, 0.4);
	--slide-button-text: white;

    /* --- Hero Gradient Colors (Dark Mode - Original Dark Rainbow) --- */
    --hero-grad-1: hsl(0, 64%, 6%);   /* Dark Red */
    --hero-grad-2: hsl(41, 66%, 9%);  /* Dark Orange */
    --hero-grad-3: hsl(80, 67%, 7%);  /* Dark Yellow-Green */
    --hero-grad-4: hsl(160, 68%, 6%); /* Dark Teal */
    --hero-grad-5: hsl(220, 66%, 8%); /* Dark Blue */
    --hero-grad-6: hsl(280, 68%, 6%); /* Dark Violet */

	--hero-text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7); /* Shadow for dark mode */
	--hero-cta-bg: hsla(
		0,
		0%,
		100%,
		0.75
	); /* Lighter semi-transparent btn for dark mode */
	--hero-cta-text: #1a1a1a; /* Dark text on btn */
	--hero-cta-hover-bg: hsla(0, 0%, 100%, 0.9);
}
/* --- End Theme Variables --- */

/* --- Base Styles --- */
html,
body {
	height: 100%;
	font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
		Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
	background-color: var(--bg-color);
	color: var(--text-color); /* Default text color applies */
	transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- Navigation Bar (Desktop - Default) --- */
#icon-nav {
	position: fixed;
	top: 0;
	right: 0;
	bottom: 0;
	width: 60px;
	background-color: var(--nav-bg);
	display: flex;
	flex-direction: column;
	align-items: center;
	padding-top: 20px;
	padding-bottom: 20px;
	gap: 15px;
	z-index: 10;
	transition: background-color 0.3s ease, width 0.3s ease, height 0.3s ease,
		top 0.3s ease, right 0.3s ease, left 0.3s ease, bottom 0.3s ease,
		flex-direction 0s;
}
/* Nav Links and Base Button Styles (Shared) */
#icon-nav a,
#icon-nav button {
	color: var(--nav-icon-color);
	font-size: 24px;
	text-decoration: none;
	padding: 8px;
	border-radius: 4px;
	display: flex;
	justify-content: center;
	align-items: center;
	transition: background-color 0.2s ease, color 0.3s ease;
	border: none;
	background: none;
	cursor: pointer;
	width: 40px;
	height: 40px;
	flex-shrink: 0;
}
#icon-nav a:hover,
#icon-nav button:hover {
	background-color: var(--link-hover-bg);
}
/* Theme Toggle Button Specifics (Desktop) */
#theme-toggle {
	margin-top: auto;
}
/* Snow Toggle Button Specifics (Desktop) */
#snow-toggle {
	margin-top: 0;
}

/* --- Hero Section (Desktop - Default) --- */
#hero {
	min-height: 100vh;
	display: flex;
	justify-content: center;
	align-items: center;
	text-align: center;
	transition: padding-top 0.3s ease, padding-right 0.3s ease;
	padding-right: 75px;
	padding-left: 15px;
	padding-top: 0;
	position: relative;
	overflow: hidden;
	/* --- Animated Dark Rainbow Background --- */
    /* Use CSS variables for gradient colors */
    background: linear-gradient(135deg,
        var(--hero-grad-1),
        var(--hero-grad-2),
        var(--hero-grad-3),
        var(--hero-grad-4),
        var(--hero-grad-5),
        var(--hero-grad-6),
        var(--hero-grad-1) /* Repeat first color for loop */
    );
	background-size: 500% 500%;
	animation: waveAnimation 10s ease infinite;
	/* --- End Animated Background --- */
}

/* Ensure hero text uses theme text color but adds shadow for readability */
#hero h2,
#hero p {
	color: var(--text-color); /* USE THEME VARIABLE */
	text-shadow: var(--hero-text-shadow); /* Use theme-dependent shadow */
	position: relative; /* Ensure text is layered above background */
	z-index: 2;
}
/* Style hero CTA button using theme variables for its specific context */
#hero .cta-button {
	background-color: var(--hero-cta-bg);
	color: var(--hero-cta-text);
	text-shadow: none;
	border: 1px solid rgba(0, 0, 0, 0.1);
	position: relative;
	z-index: 2;
	transition: background-color 0.3s ease, color 0.3s ease;
}
#hero .cta-button:hover {
	background-color: var(--hero-cta-hover-bg);
}


/* --- Slides --- */
.slides-container {
	width: 100%;
	height: auto;
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 200px;
	position: relative;
	z-index: 1; /* Behind text/buttons */
}
.slide {
	display: none;
	flex-direction: column;
	align-items: center;
	text-align: center;
	padding: 20px;
	width: 100%;
	max-width: 600px;
	animation: fadeIn 0.6s ease-in-out;
}

.slide.active {
	display: flex;
}

/* Call to Action Button in Slides */
.cta-button {
	display: inline-block;
	padding: 10px 20px;
	background-color: var(--cta-bg);
	color: var(--cta-text);
	text-decoration: none;
	border-radius: 5px;
	font-weight: bold;
	transition: background-color 0.3s ease, color 0.3s ease, opacity 0.2s ease;
}

.cta-button:hover {
	opacity: 0.9;
}

.slide h2 {
	font-size: 2rem;
	margin-bottom: 0.8rem;
	color: var(--text-color);
	transition: color 0.3s ease;
}

.slide p {
	font-size: 1.1rem;
	line-height: 1.6;
	margin-bottom: 1.5rem;
	color: var(--text-color);
	transition: color 0.3s ease;
}


/* Slide Content styles are handled by the #hero selectors above */

/* --- Slide Navigation Buttons (Prev/Next - Desktop Default) --- */
#prev-slide,
#next-slide {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	background-color: var(--slide-button-bg);
	color: var(--slide-button-text);
	border: none;
	font-size: 24px;
	font-weight: bold;
	padding: 10px 15px;
	cursor: pointer;
	border-radius: 5px;
	z-index: 5; /* Above slides, below nav */
	transition: background-color 0.3s ease, color 0.3s ease, right 0.3s ease,
		left 0.3s ease;
}
#prev-slide:hover,
#next-slide:hover {
	background-color: var(--slide-button-hover-bg);
}
#prev-slide {
	left: 15px;
}
#next-slide {
	right: calc(60px + 15px);
}

/* --- Snowfall Canvas --- */
#snowfall {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	pointer-events: none;
	z-index: 1000;
	/* display initial state set by JS */
}

/* --- Mobile Styles (screens <= 768px) --- */
@media (max-width: 768px) {
	#icon-nav {
		top: 0;
		right: 0;
		left: 0;
		bottom: auto;
		width: 100%;
		height: 55px;
		flex-direction: row;
		justify-content: space-around;
		align-items: center;
		padding-top: 0;
		padding-bottom: 0;
		padding-left: 10px;
		padding-right: 10px;
		gap: 5px;
	}
	#theme-toggle,
	#snow-toggle {
		margin-top: 0;
	}
	#hero {
		padding-right: 15px;
		padding-left: 15px;
		padding-top: 70px; /* Nav height + gap */
	}
	#prev-slide {
		left: 10px;
		padding: 8px 12px;
		font-size: 20px;
	}
	#next-slide {
		right: 10px;
		padding: 8px 12px;
		font-size: 20px;
	}
	#hero h2 {
		font-size: 1.8rem;
	}
	#hero p {
		font-size: 1rem;
	}
}

/* --- Animations --- */
@keyframes fadeIn {
	from {
		opacity: 0;
	}
	to {
		opacity: 1;
	}
}
/* Keyframes for Hero Background Animation */
@keyframes waveAnimation {
	0% {
		background-position: 0% 50%;
	}
	50% {
		background-position: 100% 50%;
	}
	100% {
		background-position: 0% 50%;
	}
}