/* Common Stack Page Styles */

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('/hero-night.jpg') no-repeat center/cover;
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 20px 16px 28px;
    color: var(--text);
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: white;
    font-size: 2em;
    margin-bottom: 3px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.subtitle {
    text-align: center;
    color: rgba(255,255,255,0.95);
    font-size: 0.9em;
    margin-bottom: 10px;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.diagram {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 15px;
    padding: 15px 20px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow: hidden;
    text-align: left;
}

.stack-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
    flex: 1;
}

.layer {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow);
}

.layer:hover {
    transform: translateX(10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.25);
}

.layer-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 0 0 220px;
    min-width: 0;
    align-self: flex-start;
}

.layer-icon {
    width: 38px;
    height: 38px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3em;
    font-weight: bold;
    color: white;
    flex-shrink: 0;
}

.layer-title {
    flex: 1;
}

.layer-title h2 {
    font-size: 1.2em;
    margin-bottom: 1px;
    color: var(--text);
}

.layer-title .full-name {
    color: var(--muted);
    font-size: 0.75em;
}

.layer-description {
    color: var(--text);
    line-height: 1.45;
    font-size: 0.9em;
    flex: 1;
}

.layer-description ul {
    margin: 0;
    padding-left: 20px;
    list-style-position: outside;
}

.layer-description li {
    margin: 3px 0;
}

.arrow {
    text-align: center;
    font-size: 1em;
    color: #667eea;
    margin: -4px 0;
    z-index: 1;
}

.flow-description {
    text-align: center;
    margin-top: 6px;
    padding: 6px 8px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.75em;
    line-height: 1.2;
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
}

.flow-description strong {
    color: #667eea;
}

.home-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--glass);
    color: var(--text);
    text-decoration: none;
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    box-shadow: var(--shadow);
    transition: all 0.2s ease;
    z-index: 100;
    font-size: 14px;
    font-weight: 600;
}

.home-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(-2px);
}

/* Responsive Design */
@media (max-width: 900px) {
    body {
        background-attachment: scroll;
    }
}

@media (max-width: 768px) {
    .home-btn {
        position: static;
        margin-bottom: 10px;
    }

    h1 {
        font-size: 2em;
    }

    .diagram {
        padding: 15px 18px;
    }

    .layer {
        padding: 10px 12px;
    }
}

@media (max-width: 540px) {
    .layer {
        flex-direction: column;
        align-items: flex-start;
    }

    .layer-left {
        flex: none;
    }
}