:root[data-theme="light"] {
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --accent-orange: #f89820;
    --accent-blue: #5382a1;
    --hover-color: rgba(248, 152, 32, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --particle-color: #f89820;
    --nav-bg: rgba(255, 255, 255, 0.9);
}

:root[data-theme="dark"] {
    --primary-bg: #1a1a1a;
    --secondary-bg: #2d2d2d;
    --card-bg: #333333;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --accent-orange: #ff9933;
    --accent-blue: #6699cc;
    --hover-color: rgba(255, 153, 51, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --particle-color: #ff9933;
    --nav-bg: rgba(26, 26, 26, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Navbar Styles */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-logo {
    cursor: pointer;
}

.nav-logo span {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(45deg, var(--accent-orange), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.5rem;
    color: var(--accent-orange);
    transition: transform 0.3s ease;
    background: var(--secondary-bg);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: rotate(180deg);
}

/* Hero Section */
.hero {
    padding-top: 80px;
    height: 40vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--accent-orange), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: titleFloat 3s ease-in-out infinite;
}

.hero p {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

/* Coffee Cup Animation */
.coffee-cup {
    position: relative;
    width: 100px;
    height: 100px;
    margin-bottom: 2rem;
}

.steam {
    position: absolute;
    width: 8px;
    height: 50px;
    background: linear-gradient(to top, transparent, var(--accent-orange));
    border-radius: 50%;
    filter: blur(4px);
    animation: steam 2s infinite;
}

.steam:nth-child(1) { left: 20px; animation-delay: 0.2s; }
.steam:nth-child(2) { left: 40px; animation-delay: 0.6s; }
.steam:nth-child(3) { left: 60px; animation-delay: 0.4s; }

/* Phases Grid */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.phases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.phase-card {
    position: relative;
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    cursor: pointer;
    overflow: hidden;
    box-shadow: 0 10px 20px var(--shadow-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.phase-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.phase-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--accent-orange);
    opacity: 0.3;
    position: absolute;
    top: 10px;
    right: 20px;
}

.phase-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.phase-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.progress-bar {
    height: 6px;
    background: var(--secondary-bg);
    border-radius: 3px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: linear-gradient(45deg, var(--accent-orange), var(--accent-blue));
    border-radius: 3px;
    animation: progressFill 1s ease-out;
}

.card-decoration {
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-size: 2rem;
    color: var(--accent-orange);
    opacity: 0.2;
    transform: rotate(-15deg);
    transition: transform 0.3s;
}

.phase-card:hover .card-decoration {
    transform: rotate(0deg) scale(1.2);
    opacity: 0.4;
}

/* Animations */
@keyframes steam {
    0% { transform: translateY(0) scaleX(1); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(-50px) scaleX(2); opacity: 0; }
}

@keyframes titleFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes progressFill {
    from { width: 0; }
    to { width: 100%; }
}

/* Particles Background */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 { font-size: 3rem; }
    .hero p { font-size: 1.2rem; }
    .phases-grid { grid-template-columns: 1fr; }
    .navbar { padding: 1rem; }
}