/*=====================================================
  THE SCIENCE SIGNAL — ABOUT PAGE
  Design system: "Signal" — editorial science journalism
  broadcasting metaphor (waveforms, channels, readouts)
======================================================*/

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{

    /* -- palette -- */
    --paper:#F6F4EC;
    --paper-dim:#EFEBDF;
    --ink:#14181F;
    --ink-soft:#525860;
    --navy:#0C1A2A;
    --navy-soft:#16283D;
    --signal:#17B8A6;
    --signal-dim:rgba(23,184,166,.14);
    --line:#DCD6C4;
    --line-dark:rgba(255,255,255,.14);

    /* -- type -- */
    --font-display:'Fraunces', Georgia, serif;
    --font-body:'Inter', -apple-system, sans-serif;
    --font-mono:'IBM Plex Mono', monospace;

    --radius:4px;
}

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

.tss-about-page{
    background:var(--paper);
    color:var(--ink);
    font-family:var(--font-body);
    -webkit-font-smoothing:antialiased;
}

.tss-about-page a{
    color:inherit;
}

.tss-about-page ::selection{
    background:var(--signal);
    color:var(--navy);
}

.tss-about-page :focus-visible{
    outline:2px solid var(--signal);
    outline-offset:3px;
}

/*=========================================
Container
==========================================*/

.container{
    width:90%;
    max-width:1180px;
    margin:auto;
}

/*=========================================
Shared: eyebrow / mono labels
==========================================*/

.eyebrow{
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:.14em;
    text-transform:uppercase;
    display:inline-flex;
    align-items:center;
    gap:10px;
}

.eyebrow::before{
    content:"";
    width:16px;
    height:1px;
    background:currentColor;
    display:inline-block;
}

/*=========================================
Hero
==========================================*/

.about-hero{
    background:var(--navy);
    color:var(--paper);
    padding:120px 20px 90px;
    position:relative;
    overflow:hidden;
}

.about-hero .container{
    position:relative;
    z-index:2;
    text-align:center;
}

.hero-tag{
    color:var(--signal);
    justify-content:center;
    margin-bottom:28px;
}

.hero-tag::before,
.hero-tag::after{
    content:"";
    width:16px;
    height:1px;
    background:currentColor;
    display:inline-block;
}

.about-hero h1{
    font-family:var(--font-display);
    font-weight:500;
    font-size:clamp(38px,6vw,64px);
    line-height:1.08;
    letter-spacing:-.01em;
    margin-bottom:24px;
}

.hero-description{
    max-width:640px;
    margin:0 auto;
    font-size:18px;
    line-height:1.75;
    color:rgba(246,244,236,.72);
}

.hero-buttons{
    margin-top:44px;
    display:flex;
    justify-content:center;
    gap:16px;
    flex-wrap:wrap;
}

/* waveform signature graphic */
.hero-waveform{
    margin-top:64px;
    width:100%;
    height:64px;
    position:relative;
    z-index:2;
}

.hero-waveform svg{
    width:100%;
    height:100%;
    display:block;
    overflow:visible;
}

.hero-waveform path{
    fill:none;
    stroke:var(--signal);
    stroke-width:1.5;
    stroke-linecap:round;
    opacity:.85;
}

.hero-waveform .wave-2{
    stroke:rgba(246,244,236,.28);
}

@media (prefers-reduced-motion: no-preference){
    .hero-waveform .wave-1{
        animation:drift 9s ease-in-out infinite;
    }
    .hero-waveform .wave-2{
        animation:drift 12s ease-in-out infinite reverse;
    }
}

@keyframes drift{
    0%,100%{ transform:translateY(0); }
    50%{ transform:translateY(-6px); }
}

/* faint grid backdrop in hero */
.about-hero::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:
        linear-gradient(rgba(246,244,236,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(246,244,236,.045) 1px, transparent 1px);
    background-size:48px 48px;
    z-index:1;
}

/*=========================================
Buttons
==========================================*/

.btn-primary{
    background:var(--signal);
    color:var(--navy);
    padding:14px 32px;
    text-decoration:none;
    border-radius:var(--radius);
    font-weight:600;
    font-size:15px;
    transition:.25s ease;
    display:inline-block;
    border:1px solid var(--signal);
}

.btn-primary:hover{
    background:transparent;
    color:var(--signal);
}

.about-hero .btn-primary:hover{
    color:var(--signal);
}

.btn-secondary{
    border:1px solid rgba(246,244,236,.35);
    color:var(--paper);
    padding:14px 32px;
    border-radius:var(--radius);
    text-decoration:none;
    font-weight:600;
    font-size:15px;
    transition:.25s ease;
    display:inline-block;
}

.btn-secondary:hover{
    border-color:var(--signal);
    color:var(--signal);
}

/*=========================================
Sections — base rhythm
==========================================*/

.about-section,
.coverage-section,
.mission-section,
.editorial-section,
.verification-section,
.contact-section{
    padding:110px 0;
}

.section-heading{
    margin-bottom:56px;
}

.section-heading span{
    color:var(--signal);
}

.section-heading h2{
    font-family:var(--font-display);
    font-weight:500;
    font-size:clamp(28px,3.4vw,42px);
    color:var(--ink);
    margin-top:18px;
    max-width:14ch;
    letter-spacing:-.01em;
}

/*=========================================
Who We Are
==========================================*/

.about-section .section-heading{
    text-align:left;
}

.about-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:70px;
    align-items:start;
}

.about-content{
    border-left:1px solid var(--line);
    padding-left:36px;
}

.about-content p{
    margin-bottom:22px;
    color:var(--ink-soft);
    line-height:1.85;
    font-size:17px;
}

.about-content p:first-of-type{
    font-family:var(--font-display);
    font-size:22px;
    color:var(--ink);
    line-height:1.5;
}

.about-image{
    position:relative;
}

.about-image img{
    width:100%;
    border-radius:var(--radius);
    display:block;
}

.about-image::after{
    content:"";
    position:absolute;
    top:18px;
    left:18px;
    right:-18px;
    bottom:-18px;
    border:1px solid var(--signal);
    border-radius:var(--radius);
    z-index:-1;
}

/*=========================================
Coverage — channel directory
==========================================*/

.coverage-section{
    background:var(--navy);
    color:var(--paper);
}

.coverage-section .section-heading span{
    color:var(--signal);
}

.coverage-section .section-heading h2{
    color:var(--paper);
    max-width:20ch;
}

.coverage-list{
    border-top:1px solid var(--line-dark);
}

.coverage-row{
    display:grid;
    grid-template-columns:90px 1fr 2fr auto;
    align-items:center;
    gap:28px;
    padding:26px 0;
    border-bottom:1px solid var(--line-dark);
    transition:.25s ease;
}

.coverage-row:hover{
    background:rgba(23,184,166,.06);
}

.channel-id{
    font-family:var(--font-mono);
    font-size:13px;
    color:var(--signal);
    letter-spacing:.05em;
}

.coverage-row h3{
    font-family:var(--font-display);
    font-weight:500;
    font-size:21px;
    color:var(--paper);
}

.coverage-row p{
    color:rgba(246,244,236,.6);
    font-size:15px;
    line-height:1.65;
}

/* decorative signal bars, unique heights per row via nth-child */
.signal-bars{
    display:flex;
    align-items:flex-end;
    gap:3px;
    height:22px;
    justify-self:end;
}

.signal-bars span{
    width:3px;
    background:var(--signal);
    opacity:.55;
    display:block;
}

.coverage-row:nth-child(1) .signal-bars span:nth-child(1){height:40%}
.coverage-row:nth-child(1) .signal-bars span:nth-child(2){height:90%}
.coverage-row:nth-child(1) .signal-bars span:nth-child(3){height:60%}
.coverage-row:nth-child(1) .signal-bars span:nth-child(4){height:100%}
.coverage-row:nth-child(1) .signal-bars span:nth-child(5){height:50%}

.coverage-row:nth-child(2) .signal-bars span:nth-child(1){height:70%}
.coverage-row:nth-child(2) .signal-bars span:nth-child(2){height:35%}
.coverage-row:nth-child(2) .signal-bars span:nth-child(3){height:95%}
.coverage-row:nth-child(2) .signal-bars span:nth-child(4){height:55%}
.coverage-row:nth-child(2) .signal-bars span:nth-child(5){height:75%}

.coverage-row:nth-child(3) .signal-bars span:nth-child(1){height:100%}
.coverage-row:nth-child(3) .signal-bars span:nth-child(2){height:45%}
.coverage-row:nth-child(3) .signal-bars span:nth-child(3){height:65%}
.coverage-row:nth-child(3) .signal-bars span:nth-child(4){height:30%}
.coverage-row:nth-child(3) .signal-bars span:nth-child(5){height:80%}

.coverage-row:nth-child(4) .signal-bars span:nth-child(1){height:55%}
.coverage-row:nth-child(4) .signal-bars span:nth-child(2){height:100%}
.coverage-row:nth-child(4) .signal-bars span:nth-child(3){height:40%}
.coverage-row:nth-child(4) .signal-bars span:nth-child(4){height:70%}
.coverage-row:nth-child(4) .signal-bars span:nth-child(5){height:50%}

.coverage-row:nth-child(5) .signal-bars span:nth-child(1){height:60%}
.coverage-row:nth-child(5) .signal-bars span:nth-child(2){height:30%}
.coverage-row:nth-child(5) .signal-bars span:nth-child(3){height:100%}
.coverage-row:nth-child(5) .signal-bars span:nth-child(4){height:45%}
.coverage-row:nth-child(5) .signal-bars span:nth-child(5){height:80%}

.coverage-row:nth-child(6) .signal-bars span:nth-child(1){height:90%}
.coverage-row:nth-child(6) .signal-bars span:nth-child(2){height:50%}
.coverage-row:nth-child(6) .signal-bars span:nth-child(3){height:70%}
.coverage-row:nth-child(6) .signal-bars span:nth-child(4){height:100%}
.coverage-row:nth-child(6) .signal-bars span:nth-child(5){height:35%}

.coverage-row:nth-child(7) .signal-bars span:nth-child(1){height:45%}
.coverage-row:nth-child(7) .signal-bars span:nth-child(2){height:80%}
.coverage-row:nth-child(7) .signal-bars span:nth-child(3){height:55%}
.coverage-row:nth-child(7) .signal-bars span:nth-child(4){height:100%}
.coverage-row:nth-child(7) .signal-bars span:nth-child(5){height:65%}

.coverage-row:nth-child(8) .signal-bars span:nth-child(1){height:100%}
.coverage-row:nth-child(8) .signal-bars span:nth-child(2){height:60%}
.coverage-row:nth-child(8) .signal-bars span:nth-child(3){height:80%}
.coverage-row:nth-child(8) .signal-bars span:nth-child(4){height:40%}
.coverage-row:nth-child(8) .signal-bars span:nth-child(5){height:55%}

/*=========================================
Mission
==========================================*/

.mission-section{
    background:var(--paper);
    text-align:center;
}

.mission-section .section-heading{
    text-align:center;
}

.mission-section .section-heading h2{
    margin-left:auto;
    margin-right:auto;
    max-width:16ch;
}

.center-text{
    max-width:780px;
    margin:auto;
    font-family:var(--font-display);
    font-size:24px;
    font-weight:400;
    color:var(--ink);
    line-height:1.6;
}

.mission-rule{
    width:44px;
    height:2px;
    background:var(--signal);
    margin:36px auto 0;
}

/*=========================================
Editorial standards — broadcast standards
==========================================*/

.editorial-section{
    background:var(--paper-dim);
}

.editorial-list{
    list-style:none;
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
    max-width:900px;
    margin:auto;
}

.editorial-list li{
    background:var(--paper-dim);
    padding:26px 28px;
    font-size:16px;
    color:var(--ink);
    display:flex;
    align-items:flex-start;
    gap:14px;
    line-height:1.5;
}

.editorial-list li::before{
    content:"";
    flex:0 0 auto;
    width:9px;
    height:9px;
    margin-top:6px;
    background:var(--signal);
    border-radius:1px;
    transform:rotate(45deg);
}

/*=========================================
Verification — signal readout
==========================================*/

.verification-section{
    background:var(--paper);
}

.verification-box{
    background:var(--navy);
    color:var(--paper);
    border-radius:var(--radius);
    padding:70px 56px;
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:50px;
    align-items:center;
    position:relative;
    overflow:hidden;
}

.verification-copy .eyebrow{
    color:var(--signal);
    margin-bottom:22px;
}

.verification-box h2{
    font-family:var(--font-display);
    font-weight:500;
    font-size:clamp(26px,3vw,36px);
    margin-bottom:18px;
    line-height:1.2;
}

.verification-box p{
    line-height:1.8;
    font-size:16px;
    color:rgba(246,244,236,.68);
    margin-bottom:32px;
    max-width:46ch;
}

.readout{
    background:var(--navy-soft);
    border:1px solid var(--line-dark);
    border-radius:var(--radius);
    padding:26px 28px;
    font-family:var(--font-mono);
    font-size:13px;
    line-height:2;
    color:rgba(246,244,236,.7);
}

.readout .readout-line{
    display:flex;
    justify-content:space-between;
    gap:20px;
}

.readout .readout-line span:last-child{
    color:var(--signal);
}

.readout .readout-status{
    margin-top:14px;
    padding-top:14px;
    border-top:1px solid var(--line-dark);
    display:flex;
    align-items:center;
    gap:10px;
    color:var(--signal);
}

.readout .dot{
    width:7px;
    height:7px;
    border-radius:50%;
    background:var(--signal);
    display:inline-block;
}

@media (prefers-reduced-motion: no-preference){
    .readout .dot{
        animation:pulse 1.8s ease-in-out infinite;
    }
}

@keyframes pulse{
    0%,100%{ opacity:1; }
    50%{ opacity:.35; }
}

/*=========================================
Contact
==========================================*/

.contact-section{
    text-align:center;
}

.contact-section .eyebrow{
    justify-content:center;
    color:var(--signal);
    margin-bottom:22px;
}

.contact-section h2{
    font-family:var(--font-display);
    font-weight:500;
    font-size:clamp(28px,3.4vw,40px);
    margin-bottom:18px;
}

.contact-section p{
    max-width:520px;
    margin:auto;
    color:var(--ink-soft);
    line-height:1.8;
    margin-bottom:36px;
    font-size:17px;
}

.contact-section .btn-primary{
    background:var(--navy);
    color:var(--paper);
    border-color:var(--navy);
}

.contact-section .btn-primary:hover{
    background:transparent;
    color:var(--navy);
}

/*=========================================
Responsive
==========================================*/

@media(max-width:992px){

    .about-grid{
        grid-template-columns:1fr;
        gap:44px;
    }

    .about-image::after{
        display:none;
    }

    .coverage-row{
        grid-template-columns:60px 1fr;
        row-gap:8px;
    }

    .coverage-row p{
        grid-column:2 / 3;
    }

    .signal-bars{
        display:none;
    }

    .verification-box{
        grid-template-columns:1fr;
        padding:50px 32px;
    }

    .editorial-list{
        grid-template-columns:1fr;
    }
}

@media(max-width:768px){

    .about-hero{
        padding:90px 20px 60px;
    }

    .about-section,
    .coverage-section,
    .mission-section,
    .editorial-section,
    .verification-section,
    .contact-section{
        padding:72px 0;
    }

    .about-content{
        padding-left:24px;
    }

    .center-text{
        font-size:20px;
    }

    .hero-buttons{
        flex-direction:column;
        align-items:stretch;
    }

    .hero-buttons a{
        text-align:center;
    }
}