/* Fractal Tree - Recursive branching pattern
   Showcases: CSS transforms, nested structures, animations, natural fractals */

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

:root {
    --sky-top: #1a1a2e;
    --sky-mid: #2d3a4a;
    --sky-bottom: #4a5568;
    --ground: #2d1b0e;
    --ground-grass: #1a3c1a;

    --bark-dark: #3d2314;
    --bark-light: #5c3d2e;
    --leaf-green: #4ade80;
    --leaf-light: #86efac;
    --leaf-dark: #22c55e;

    --text-light: #e8e8e8;
    --text-muted: #a0a0a0;
}

html, body {
    height: 100%;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    background: var(--sky-top);
    color: var(--text-light);
    line-height: 1.8;
    overflow-x: hidden;
}

.scene {
    position: relative;
    min-height: 100vh;
}

/* Sky gradient */
.sky {
    position: fixed;
    inset: 0;
    background: linear-gradient(
        to bottom,
        var(--sky-top) 0%,
        var(--sky-mid) 50%,
        var(--sky-bottom) 100%
    );
    z-index: 0;
}

/* Tree container */
.tree-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 3rem;
    min-height: 60vh;
}

.tree {
    position: relative;
    width: 300px;
    height: 350px;
}

/* Branch base styles */
.branch {
    position: absolute;
    background: linear-gradient(90deg, var(--bark-dark), var(--bark-light), var(--bark-dark));
    border-radius: 2px;
    transform-origin: bottom center;
}

/* Trunk */
.trunk {
    width: 20px;
    height: 100px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(90deg, var(--bark-dark), var(--bark-light), var(--bark-dark));
}

/* Level 1 branches */
.b1-left, .b1-right, .b1-center {
    width: 12px;
    height: 70px;
    bottom: 100%;
    left: 50%;
}

.b1-left {
    transform: translateX(-50%) rotate(-35deg);
    animation: sway-left 6s ease-in-out infinite;
}

.b1-right {
    transform: translateX(-50%) rotate(35deg);
    animation: sway-right 6s ease-in-out infinite;
}

.b1-center {
    transform: translateX(-50%) rotate(0deg);
    height: 50px;
}

/* Level 2 branches */
.b2-left, .b2-right {
    width: 8px;
    height: 45px;
    bottom: 100%;
    left: 50%;
}

.b2-left {
    transform: translateX(-50%) rotate(-30deg);
}

.b2-right {
    transform: translateX(-50%) rotate(30deg);
}

/* Level 3 branches */
.b3-left, .b3-right {
    width: 5px;
    height: 30px;
    bottom: 100%;
    left: 50%;
}

.b3-left {
    transform: translateX(-50%) rotate(-25deg);
}

.b3-right {
    transform: translateX(-50%) rotate(25deg);
}

/* Leaves */
.leaf {
    position: absolute;
    width: 20px;
    height: 20px;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(ellipse at center, var(--leaf-light) 0%, var(--leaf-green) 50%, var(--leaf-dark) 100%);
    border-radius: 50% 0 50% 0;
    animation: leaf-flutter 3s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(74, 222, 128, 0.3);
}

/* Stagger leaf animations */
.b1-left .b2-left .b3-left .leaf { animation-delay: 0s; }
.b1-left .b2-left .b3-right .leaf { animation-delay: 0.5s; }
.b1-left .b2-right .b3-left .leaf { animation-delay: 1s; }
.b1-left .b2-right .b3-right .leaf { animation-delay: 1.5s; }
.b1-right .b2-left .b3-left .leaf { animation-delay: 0.25s; }
.b1-right .b2-left .b3-right .leaf { animation-delay: 0.75s; }
.b1-right .b2-right .b3-left .leaf { animation-delay: 1.25s; }
.b1-right .b2-right .b3-right .leaf { animation-delay: 1.75s; }
.b1-center .b2-left .leaf { animation-delay: 2s; }
.b1-center .b2-right .leaf { animation-delay: 2.25s; }

@keyframes sway-left {
    0%, 100% { transform: translateX(-50%) rotate(-35deg); }
    50% { transform: translateX(-50%) rotate(-40deg); }
}

@keyframes sway-right {
    0%, 100% { transform: translateX(-50%) rotate(35deg); }
    50% { transform: translateX(-50%) rotate(40deg); }
}

@keyframes leaf-flutter {
    0%, 100% {
        transform: translateX(-50%) rotate(0deg) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateX(-50%) rotate(10deg) scale(1.1);
        opacity: 0.9;
    }
}

/* Ground */
.ground {
    width: 100%;
    height: 60px;
    background: linear-gradient(
        to bottom,
        var(--ground-grass) 0%,
        var(--ground) 40%,
        #1a0f08 100%
    );
    position: relative;
}

.ground::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 10px;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 8px,
        var(--leaf-dark) 8px,
        var(--leaf-dark) 10px
    );
    opacity: 0.5;
}

/* Content */
.content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
    background: linear-gradient(180deg,
        rgba(26, 26, 46, 0.9) 0%,
        rgba(26, 26, 46, 0.95) 100%
    );
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: clamp(2rem, 7vw, 3rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--leaf-green);
    text-shadow: 0 0 20px rgba(74, 222, 128, 0.3);
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: clamp(1rem, 3vw, 1.2rem);
    font-style: italic;
    color: var(--text-muted);
}

.text {
    margin-bottom: 2rem;
}

.philosophy {
    font-size: clamp(1.1rem, 2.5vw, 1.25rem);
    text-align: center;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--leaf-dark);
    background: rgba(74, 222, 128, 0.05);
    font-style: italic;
}

.sections {
    display: grid;
    gap: 2rem;
}

section {
    padding-bottom: 1.5rem;
    border-bottom: 1px dashed var(--text-muted);
}

section:last-child {
    border-bottom: none;
}

section h3 {
    font-size: 1.2rem;
    color: var(--leaf-light);
    margin-bottom: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

section p {
    font-size: 1rem;
    text-align: justify;
}

.footer {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    padding-top: 1rem;
    border-top: 1px solid var(--bark-dark);
}

/* Responsive */
@media (max-width: 600px) {
    .tree {
        transform: scale(0.8);
    }

    .content {
        padding: 2rem 1rem;
    }

    .tree-container {
        padding-top: 1rem;
        min-height: 50vh;
    }
}

@media (prefers-reduced-motion: reduce) {
    .b1-left, .b1-right {
        animation: none;
    }

    .leaf {
        animation: none;
    }
}

/* Stars for night sky effect */
.sky::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 20px 30px, white, transparent),
        radial-gradient(1px 1px at 40px 70px, white, transparent),
        radial-gradient(1px 1px at 50px 160px, white, transparent),
        radial-gradient(1px 1px at 90px 40px, white, transparent),
        radial-gradient(1px 1px at 130px 80px, white, transparent),
        radial-gradient(1px 1px at 160px 120px, white, transparent),
        radial-gradient(1px 1px at 200px 50px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1.5px 1.5px at 250px 100px, white, transparent),
        radial-gradient(1px 1px at 300px 60px, white, transparent),
        radial-gradient(1px 1px at 350px 140px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 400px 30px, white, transparent),
        radial-gradient(1.5px 1.5px at 450px 90px, white, transparent),
        radial-gradient(1px 1px at 500px 150px, white, transparent),
        radial-gradient(1px 1px at 80px 200px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 180px 180px, white, transparent),
        radial-gradient(1px 1px at 280px 220px, white, transparent),
        radial-gradient(1.5px 1.5px at 380px 200px, rgba(255,255,255,0.9), transparent),
        radial-gradient(1px 1px at 480px 240px, white, transparent);
    background-repeat: repeat;
    background-size: 500px 250px;
    animation: twinkle 8s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}