/* ==========================================================================
   Analyzing Eccentric Binary Black Holes — Section 1
   ========================================================================== */

.bbh-blog {
    background-color: #12253A;
    min-height: 100vh;
}

/* Hide default navbar/footer backgrounds that conflict */
.bbh-blog + #footer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Intro description */
.bbh-intro {
    max-width: 1600px;
    margin: 0 auto;
    padding: 3rem 2rem 0;
    text-align: left;
}

.bbh-intro p {
    color: rgba(255, 255, 255, 0.7);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.7;
}

/* Section 1 layout */
#section-1 {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 2rem;
}

.section1-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    justify-content: flex-end;
    width: 100%;
    max-width: 1600px;
    padding: 0 2rem;
}

/* Controls area (left/center) */
.controls-area {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.control-row {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: nowrap;
}

/* Character area (right) */
.character-area {
    position: relative;
    flex-shrink: 0;
    width: 520px;
    margin-top: -2rem;
    margin-right: -2rem;
}

.character-area img {
    width: 100%;
    height: auto;
    display: block;
}

/* Speech bubble overlaid on the blue rectangle in the image */
.character-area .speech-bubble {
    top: 22%;
    left: 2%;
    width: 48%;
    height: 40%;
    display: flex;
    align-items: flex-start;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
}

.character-area .speech-bubble::-webkit-scrollbar {
    display: none;
}

/* Simulate button with divider lines */
.simulate-btn-wrap {
    margin-top: 3rem;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.simulate-btn-wrap .section-divider-line {
    flex: 1;
    height: 2px;
    background-color: #A74949;
}

#simulate-btn,
#analyze-btn,
#useful-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    width: 600px;
    flex-shrink: 0;
    outline: none;
}

#simulate-btn img,
#analyze-btn img,
#useful-btn img {
    width: 100%;
    height: auto;
    display: block;
}

#simulate-btn .btn-hover,
#analyze-btn .btn-hover,
#useful-btn .btn-hover {
    display: none;
}

#simulate-btn:hover .btn-normal,
#analyze-btn:hover .btn-normal,
#useful-btn:hover .btn-normal {
    display: none;
}

#simulate-btn:hover .btn-hover,
#analyze-btn:hover .btn-hover,
#useful-btn:hover .btn-hover {
    display: block;
}

@keyframes bbh-shake {
    0%, 100% { transform: translateX(0); }
    15% { transform: translateX(-3px) rotate(-1.5deg); }
    30% { transform: translateX(3px) rotate(1.5deg); }
    45% { transform: translateX(-2px) rotate(-1deg); }
    60% { transform: translateX(2px) rotate(1deg); }
    75% { transform: translateX(-1px) rotate(-0.5deg); }
}

#simulate-btn:hover,
#analyze-btn:hover,
#useful-btn:hover {
    animation: bbh-shake 0.4s ease-in-out;
}

#simulate-btn:disabled,
#analyze-btn:disabled,
#useful-btn:disabled {
    opacity: 0.5;
    cursor: wait;
    animation: none;
}

/* ==========================================================================
   Section 1 — Locked state
   ========================================================================== */

.bbh-section.locked {
    position: relative;
    pointer-events: none;
}

.bbh-section.locked::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(18, 37, 58, 0.55);
    z-index: 100;
}

/* ==========================================================================
   Section 2 — Simulation Results
   ========================================================================== */

#section-2 {
    padding: 2rem 1.5rem;
}

.section2-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    max-width: 1600px;
    margin: 0 auto;
}

/* Left: character area (same style as Section 1 but mirrored) */
.section2-character-area {
    position: relative;
    flex-shrink: 0;
    width: 420px;
}

.section2-character-area img {
    width: 100%;
    height: auto;
    display: block;
    transform: scaleX(-1);
}

.section2-character-area .speech-bubble {
    top: 22%;
    right: 2%;
    left: auto;
    width: 48%;
    height: 40%;
    display: flex;
    align-items: flex-start;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
}

.section2-character-area .speech-bubble::-webkit-scrollbar {
    display: none;
}

/* Right: simulation panels */
.section2-panels {
    flex: 1;
    position: relative;
    min-height: 500px;
}

.panel-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.panel-loading p {
    color: rgba(255, 255, 255, 0.5);
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    margin-top: 1rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: #ef8376;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.panel-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.panel-content canvas {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
}

#trajectory-canvas {
    height: 250px;
}

#hp-canvas {
    height: 150px;
}

#h1-strain-canvas, #l1-strain-canvas {
    height: 150px;
}

/* ==========================================================================
   Section 3 — Transition paragraphs + Analyze button
   ========================================================================== */

.full-divider-line {
    height: 2px;
    background-color: #A74949;
    max-width: 1600px;
    margin: 0 auto;
}

.bbh-paragraph-row {
    display: flex;
    gap: 2rem;
    align-items: center;
    max-width: 1600px;
    margin: 0 auto 2.5rem;
    padding: 0 2rem;
}

.bbh-paragraph-row.reverse {
    flex-direction: row-reverse;
}

.bbh-paragraph-text {
    flex: 1;
}

.bbh-paragraph-text p {
    color: rgba(255, 255, 255, 0.75);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.7;
}

.bbh-paragraph-character {
    flex: 1;
}

.bbh-paragraph-character img {
    width: 100%;
    height: auto;
    display: block;
}

.bbh-paragraph-character img.flipped {
    transform: scaleX(-1);
}

/* ==========================================================================
   Section 4 — Posterior distributions
   ========================================================================== */

.section4-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section4-character-area {
    position: relative;
    flex-shrink: 0;
    width: 420px;
}

.section4-character-area img {
    width: 100%;
    height: auto;
    display: block;
}

.section4-character-area img.flipped {
    transform: scaleX(-1);
}

.section4-character-area .speech-bubble {
    top: 22%;
    right: 2%;
    left: auto;
    width: 48%;
    height: 40%;
    display: flex;
    align-items: flex-start;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: none;
}

.section4-character-area .speech-bubble::-webkit-scrollbar {
    display: none;
}

.section4-posteriors {
    flex: 1;
    position: relative;
    min-height: 400px;
}

.posteriors-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.posteriors-grid canvas {
    width: 100%;
    height: 220px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
}

/* ==========================================================================
   Section 5 — Astrophysical Implications
   ========================================================================== */

.section5-layout {
    display: flex;
    gap: 0.5rem;
    align-items: stretch;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section5-sub {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
    min-height: 500px;
}

/* Hidden subsections still take up space */
#sub-sims, #sub-hists {
    opacity: 0;
    transition: opacity 0.5s ease;
}

#galaxy-canvas {
    width: 100%;
    height: 450px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
}

/* Arrows between subsections */
.s5-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
    width: 2rem;
}

/* Simulation boxes */
.sim-box, .hist-box {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    padding: 0.4rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.nsc-border { border: 1px solid rgba(255, 107, 107, 0.3); }
.gc-border  { border: 1px solid rgba(77, 166, 255, 0.3); }
.iso-border { border: 1px solid rgba(102, 187, 106, 0.3); }

.sim-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.sim-label {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    font-weight: 600;
}

.nsc-color { color: #ff6b6b; }
.gc-color  { color: #4da6ff; }
.iso-color { color: #66bb6a; }

.sim-slider-label {
    font-family: 'Courier New', monospace;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.sim-slider-label input[type="range"] {
    width: 80px;
    height: 4px;
    accent-color: #ef8376;
}

.sim-canvas {
    width: 100%;
    height: 120px;
    border-radius: 4px;
}

.hist-canvas {
    width: 100%;
    height: 200px;
    border-radius: 4px;
}

/* Section 5 buttons */
.s5-btn {
    display: block;
    margin: 0.5rem auto 0;
    padding: 0.5rem 1.5rem;
    background: rgba(167, 73, 73, 0.6);
    border: 1px solid #A74949;
    border-radius: 4px;
    color: #ffffff;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background 0.2s;
}

.s5-btn:hover {
    background: rgba(167, 73, 73, 0.9);
    color: #ffffff;
}

/* Responsive */
@media (max-width: 960px) {
    .section5-layout {
        flex-direction: column;
    }

    .s5-arrow {
        transform: rotate(90deg);
        width: auto;
        height: 2rem;
    }
}

/* Responsive */
@media (max-width: 960px) {
    .section2-character-area,
    .section4-character-area {
        display: none;
    }

    .bbh-paragraph-character {
        display: none;
    }

    .posteriors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Responsive */
@media (max-width: 960px) {
    .character-area {
        display: none;
    }

    .section1-layout {
        justify-content: center;
    }
}

@media (max-width: 740px) {
    .control-row {
        flex-direction: column;
        align-items: center;
    }

    .bbh-section {
        padding: 2rem 1rem;
    }
}