/* =============================================
   SHARED CASE STUDY STYLES
   Alex Kostakis Portfolio
============================================= */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg:      #0C0C0C;
    --surface: #111111;
    --border:  #1E1E1E;
    --text:    #EBEBEB;
    --muted:   #555555;
    --accent:  #C8FF00;
    --serif:   'DM Serif Display', serif;
    --sans:    'Space Grotesk', sans-serif;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.6;
    cursor: none;
    overflow-x: hidden;
}

/* GRAIN */
#grain {
    position: fixed;
    inset: -50%; width: 200%; height: 200%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 180px 180px;
    pointer-events: none;
    z-index: 9997;
    opacity: 0.038;
    animation: grainShift 0.35s steps(1) infinite;
}
@keyframes grainShift {
    0%  {transform:translate(0,0)}10%{transform:translate(-2%,-3%)}20%{transform:translate(3%,1%)}
    30% {transform:translate(-1%,4%)}40%{transform:translate(4%,-2%)}50%{transform:translate(-3%,1%)}
    60% {transform:translate(2%,-4%)}70%{transform:translate(-4%,3%)}80%{transform:translate(3%,-1%)}
    90% {transform:translate(-1%,3%)}100%{transform:translate(2%,-2%)}
}

/* SCROLL PROGRESS */
#progress-bar {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    width: 0%;
    background: var(--accent);
    z-index: 9998;
    transition: width 0.1s linear;
}

/* CURSOR */
.cursor { position: fixed; top: 0; left: 0; pointer-events: none; z-index: 9999; }
.cursor__dot {
    width: 5px; height: 5px;
    background: var(--accent);
    border-radius: 50%;
    position: absolute;
    transform: translate(-50%,-50%);
    transition: opacity 0.2s;
}
.cursor__ring {
    width: 36px; height: 36px;
    border: 1.5px solid rgba(200,255,0,0.45);
    border-radius: 50%;
    position: absolute;
    transform: translate(-50%,-50%);
    transition: width 0.4s cubic-bezier(0.16,1,0.3,1), height 0.4s cubic-bezier(0.16,1,0.3,1), background 0.3s, border-color 0.3s;
}
body.cursor-hover .cursor__ring {
    width: 58px; height: 58px;
    background: rgba(200,255,0,0.08);
    border-color: var(--accent);
}

/* NAV */
#nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 200;
    padding: 28px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav__back {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    text-decoration: none;
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.2s;
}
.nav__back:hover { color: var(--text); }
.nav__back::before { content: '←'; }
.nav__project {
    font-family: var(--serif);
    font-style: italic;
    font-size: 16px;
    color: var(--muted);
}
.nav__cta {
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--accent);
    padding: 9px 22px;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 600;
}

/* ─── HERO ─────────────────────────────── */
.cs-hero {
    min-height: 100vh;
    padding: 160px 48px 80px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.cs-hero::before {
    content: '';
    position: absolute;
    top: -20%; right: -10%;
    width: 55vw; height: 55vw;
    background: radial-gradient(circle, rgba(200,255,0,0.05) 0%, transparent 68%);
    pointer-events: none;
    animation: glowBreathe 5s ease-in-out infinite;
}
@keyframes glowBreathe {
    0%,100%{transform:scale(1);opacity:0.6}
    50%{transform:scale(1.12);opacity:1}
}

.cs-hero__eyebrow {
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 14px;
    overflow: hidden;
}
.cs-hero__eyebrow-inner {
    display: flex;
    align-items: center;
    gap: 14px;
    transform: translateY(120%);
}
.cs-hero__eyebrow-inner::before {
    content: '';
    display: block;
    width: 36px; height: 1px;
    background: var(--accent);
    flex-shrink: 0;
}

.cs-hero__title {
    font-family: var(--serif);
    font-style: italic;
    font-size: clamp(72px, 12vw, 180px);
    line-height: 0.9;
    margin-bottom: 48px;
    overflow: hidden;
}
.cs-hero__title .word {
    display: block;
    overflow: hidden;
}
.cs-hero__title .char {
    display: inline-block;
    transform: translateY(115%);
    will-change: transform;
}

.cs-hero__meta {
    display: flex;
    gap: 0;
    border-top: 1px solid var(--border);
    padding-top: 32px;
    flex-wrap: wrap;
}
.cs-hero__meta-item {
    padding: 0 40px 0 0;
    margin-right: 40px;
    border-right: 1px solid var(--border);
}
.cs-hero__meta-item:last-child { border-right: none; }
.cs-meta-label {
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    display: block;
    margin-bottom: 6px;
}
.cs-meta-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    display: block;
}

/* ─── SECTIONS ──────────────────────────── */
.cs-section {
    padding: 100px 48px;
    border-bottom: 1px solid var(--border);
}

.cs-section--dark { background: var(--surface); }

.cs-section__inner {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 64px;
    align-items: start;
}

.cs-section__label {
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    padding-top: 8px;
    position: sticky;
    top: 100px;
}

.cs-section__body {}

.cs-pull {
    font-family: var(--serif);
    font-style: italic;
    font-size: clamp(26px, 3.2vw, 42px);
    line-height: 1.25;
    color: var(--text);
    margin-bottom: 32px;
}

.cs-pull em { color: var(--accent); font-style: normal; }

.cs-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--muted);
    max-width: 640px;
}

.cs-text + .cs-text { margin-top: 20px; }
.cs-text strong { color: var(--text); }

/* ─── SCREENSHOTS ───────────────────────── */
.cs-screens {
    padding: 80px 48px;
    border-bottom: 1px solid var(--border);
}

.cs-screens__grid {
    display: grid;
    gap: 16px;
}

.cs-screens__grid--2 { grid-template-columns: 1fr 1fr; }
.cs-screens__grid--1 { grid-template-columns: 1fr; }

.cs-screen {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    aspect-ratio: 16/9;
}

.cs-screen img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}

.cs-screen__placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 1px dashed #2a2a2a;
    border-radius: 8px;
}

.cs-screen__placeholder-icon {
    font-size: 28px;
    opacity: 0.2;
}

.cs-screen__placeholder-text {
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    opacity: 0.5;
}

.cs-screen__placeholder-file {
    font-size: 10px;
    letter-spacing: 0.08em;
    color: var(--muted);
    opacity: 0.3;
    font-family: monospace;
}

/* ─── PHONE MOCKUPS ─────────────────────── */
.cs-phones {
    padding: 80px 48px;
    border-bottom: 1px solid var(--border);
}

.cs-phones__row {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 28px;
    flex-wrap: wrap;
}

.cs-phone {
    flex-shrink: 0;
    width: 196px;
}

.cs-phone__frame {
    border-radius: 46px;
    border: 9px solid #1c1c1e;
    box-shadow:
        inset 0 0 0 1px #3a3a3c,
        0 0 0 1px #050505,
        0 40px 80px rgba(0,0,0,0.65),
        0 8px 24px rgba(0,0,0,0.4);
    overflow: hidden;
    background: #0a0a0a;
    position: relative;
    /* Power button */
}

.cs-phone__frame::after {
    content: '';
    position: absolute;
    right: -13px;
    top: 88px;
    width: 4px;
    height: 60px;
    background: #1c1c1e;
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 0 1px #050505;
}

.cs-phone__frame img {
    display: block;
    width: 100%;
    height: auto;
}

.cs-phone__label {
    margin-top: 14px;
    text-align: center;
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    opacity: 0.4;
}

/* ─── PROCESS ───────────────────────────── */
.cs-process {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 0;
}

.cs-process__step {
    background: var(--surface);
    padding: 40px 32px;
    transition: background 0.3s;
}

.cs-process__step:hover { background: #181818; }

.cs-process__num {
    font-family: var(--serif);
    font-style: italic;
    font-size: 40px;
    line-height: 1;
    color: var(--border);
    display: block;
    margin-bottom: 20px;
}

.cs-process__title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text);
    margin-bottom: 12px;
}

.cs-process__desc {
    font-size: 13px;
    line-height: 1.65;
    color: var(--muted);
}

/* ─── SOLUTIONS ─────────────────────────── */
.cs-solutions {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.cs-solution {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 24px;
    align-items: start;
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
}

.cs-solution:first-child { border-top: 1px solid var(--border); }

.cs-solution__num {
    font-family: var(--serif);
    font-style: italic;
    font-size: 20px;
    color: var(--accent);
    padding-top: 2px;
}

.cs-solution__title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.cs-solution__desc {
    font-size: 14px;
    line-height: 1.65;
    color: var(--muted);
}

/* ─── OUTCOMES ──────────────────────────── */
.cs-outcomes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 48px;
}

.cs-outcome {
    background: var(--bg);
    padding: 48px 40px;
}

.cs-outcome__num {
    font-family: var(--serif);
    font-style: italic;
    font-size: clamp(48px, 6vw, 80px);
    line-height: 1;
    color: var(--accent);
    display: block;
    margin-bottom: 12px;
}

.cs-outcome__label {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
}

/* ─── NEXT PROJECT ──────────────────────── */
.cs-next {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 80px 48px;
    text-decoration: none;
    color: inherit;
    border-top: 1px solid var(--border);
    transition: background 0.3s;
    position: relative;
    overflow: hidden;
}

.cs-next::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--surface);
    transform: translateX(-101%);
    transition: transform 0.5s cubic-bezier(0.76, 0, 0.24, 1);
    z-index: 0;
}

.cs-next:hover::before { transform: translateX(0); }
.cs-next > * { position: relative; z-index: 1; }

.cs-next__label {
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    display: block;
    margin-bottom: 12px;
}

.cs-next__title {
    font-family: var(--serif);
    font-style: italic;
    font-size: clamp(32px, 5vw, 72px);
    line-height: 1;
    transition: color 0.2s;
}

.cs-next:hover .cs-next__title { color: var(--accent); }

.cs-next__arrow {
    font-size: 40px;
    color: var(--muted);
    transition: transform 0.3s, color 0.2s;
}

.cs-next:hover .cs-next__arrow {
    transform: translate(8px, -8px);
    color: var(--accent);
}

/* FOOTER */
.cs-footer {
    padding: 28px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border);
}

.cs-footer p { font-size: 12px; color: var(--muted); }

/* ─── RESPONSIVE ────────────────────────── */
@media (max-width: 960px) {
    body { cursor: auto; }
    .cursor { display: none; }
    #nav { padding: 20px 24px; }
    .nav__project { display: none; }
    .cs-hero { padding: 140px 24px 60px; }
    .cs-section { padding: 64px 24px; }
    .cs-section__inner { grid-template-columns: 1fr; gap: 32px; }
    .cs-section__label { position: static; }
    .cs-screens { padding: 48px 24px; }
    .cs-screens__grid--2 { grid-template-columns: 1fr; }
    .cs-phones { padding: 48px 24px; }
    .cs-phones__row { gap: 16px; }
    .cs-phone { width: 160px; }
    .cs-process { grid-template-columns: 1fr 1fr; }
    .cs-outcomes { grid-template-columns: 1fr; }
    .cs-next { padding: 60px 24px; }
    .cs-footer { padding: 24px; flex-direction: column; gap: 12px; }
    .cs-hero__meta-item { padding: 0 24px 0 0; margin-right: 24px; }
}

@media (max-width: 600px) {
    .cs-process { grid-template-columns: 1fr; }
    .cs-hero__title { font-size: clamp(56px, 14vw, 100px); }
    .cs-phone { width: 130px; }
    .cs-phone__frame { border-radius: 32px; border-width: 7px; }
}