/* ====================================================
   INNER PAGE SHARED STYLES
   ==================================================== */

/* Inner page — content visible immediately (no cover) */
.inner-page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

/* ====================================================
   CASE STUDY HERO
   ==================================================== */
.cs-hero {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 60px var(--pad) 80px;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.cs-hero.in-view {
    opacity: 1;
    transform: translateY(0);
}

.cs-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-3);
    text-decoration: none;
    margin-bottom: 48px;
    border-bottom: 1px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.cs-back:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.cs-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.cs-category {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
}

.cs-year {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-3);
}

.cs-title {
    font-family: var(--font-serif);
    font-size: clamp(2.4rem, 5vw, 4rem);
    font-weight: 700;
    font-style: italic;
    color: var(--text);
    line-height: 1.15;
    margin-bottom: 20px;
    max-width: 800px;
}

.cs-subtitle {
    font-size: 1.1rem;
    color: var(--text-2);
    max-width: 680px;
    line-height: 1.7;
    margin-bottom: 32px;
}

.cs-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.cs-tags span {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-2);
    border: 1px solid var(--border);
    padding: 5px 14px;
    background: var(--surface);
}

/* ====================================================
   CASE STUDY SECTIONS
   ==================================================== */
.cs-section {
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.cs-section.in-view {
    opacity: 1;
    transform: translateY(0);
}

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

.cs-section-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 80px var(--pad);
}

.cs-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.cs-two-col--flip {
    direction: rtl;
}

.cs-two-col--flip > * {
    direction: ltr;
}

.cs-eyebrow {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 6px;
    color: var(--accent);
    margin-bottom: 12px;
    display: block;
}

.cs-section h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 400;
    font-style: italic;
    color: var(--text);
    line-height: 1.25;
    margin-bottom: 24px;
}

.cs-text p {
    font-size: 1rem;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 18px;
}

.cs-text p:last-child { margin-bottom: 0; }

/* ====================================================
   ILLUSTRATION: BROWSER CHAOS
   ==================================================== */
.illus-browsers {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 32px;
    background: var(--surface-2);
    border: 1px solid var(--border);
}

.browser-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
}

.browser-tab {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: 2px solid var(--text-3);
    padding: 10px 12px;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-3);
    text-align: center;
    position: relative;
}

.browser-tab::before {
    content: '● ● ●';
    display: block;
    font-size: 0.4rem;
    letter-spacing: 2px;
    color: var(--border);
    margin-bottom: 6px;
}

.chaos-center {
    text-align: center;
    padding: 16px 0 0;
    border-top: 1px dashed var(--border);
    width: 100%;
}

.chaos-q {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-style: italic;
    color: var(--accent);
    display: block;
    line-height: 1;
    margin-bottom: 6px;
}

.chaos-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-3);
}

/* ====================================================
   ILLUSTRATION: PERSONA CARDS
   ==================================================== */
.illus-personas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 40px;
}

.persona-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: 2px solid var(--accent);
    padding: 24px 20px;
    text-align: center;
}

.persona-icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
    display: block;
}

.persona-name {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 8px;
    display: block;
}

.persona-note {
    font-size: 0.82rem;
    color: var(--text-2);
    line-height: 1.5;
}

/* ====================================================
   ILLUSTRATION: STAT CALLOUT
   ==================================================== */
.illus-stat {
    text-align: center;
    padding: 48px 32px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    position: relative;
}

.illus-stat::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--accent);
}

.stat-big {
    font-family: var(--font-serif);
    font-size: clamp(4rem, 12vw, 7rem);
    font-weight: 700;
    font-style: italic;
    color: var(--accent);
    line-height: 1;
    display: block;
    margin-bottom: 8px;
}

.stat-unit {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 5px;
    color: var(--text-2);
    display: block;
    margin-bottom: 16px;
}

.stat-sub {
    font-size: 0.82rem;
    color: var(--text-3);
    line-height: 1.5;
}

/* ====================================================
   ILLUSTRATION: CHAT MOCKUP
   ==================================================== */
.chat-mockup {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
    font-family: var(--font-sans);
}

.chat-header {
    background: var(--surface);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.chat-dots {
    display: flex;
    gap: 5px;
}

.chat-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    display: block;
}

.chat-dots span:first-child { background: #ff5f57; }
.chat-dots span:nth-child(2) { background: #febc2e; }
.chat-dots span:nth-child(3) { background: #28c840; }

.chat-name {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-3);
}

.chat-body {
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-msg {
    max-width: 80%;
    padding: 10px 14px;
    font-size: 0.82rem;
    line-height: 1.5;
    border-radius: 2px;
}

.chat-msg.user {
    background: var(--accent);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 0;
}

.chat-msg.bot {
    background: var(--surface);
    color: var(--text-2);
    align-self: flex-start;
    border: 1px solid var(--border);
    border-bottom-left-radius: 0;
}

.chat-msg.frustrated {
    background: rgba(255,76,41,0.1);
    border: 1px solid rgba(255,76,41,0.3);
    color: var(--accent);
    font-style: italic;
}

.chat-loop-note {
    font-size: 0.7rem;
    text-align: center;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 12px 16px;
    background: rgba(255,76,41,0.06);
    border-top: 1px solid rgba(255,76,41,0.15);
}

.chat-wall {
    align-self: flex-start;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.chat-wall-dots {
    font-size: 1.2rem;
    color: var(--text-3);
    letter-spacing: 4px;
}

.chat-wall-note {
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 1px;
    font-style: italic;
}

/* ====================================================
   ILLUSTRATION: URGENCY COMPARISON
   ==================================================== */
.illus-urgency {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 16px;
    align-items: center;
    padding: 32px;
    background: var(--surface-2);
    border: 1px solid var(--border);
}

.urgency-path {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
}

.urgency-msg {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 10px 14px;
    font-size: 0.82rem;
    color: var(--text-2);
    font-style: italic;
    width: 100%;
}

.urgency-msg.urgent {
    border-color: rgba(255,76,41,0.4);
    color: var(--text);
}

.urgency-arrow {
    font-size: 1.2rem;
    color: var(--text-3);
}

.urgency-same {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 10px 14px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-3);
    width: 100%;
    text-align: center;
}

.urgency-eq {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--accent);
    font-style: italic;
}

.urgency-note {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    text-align: center;
    grid-column: 1 / -1;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

/* ====================================================
   ILLUSTRATION: DECISION TREE
   ==================================================== */
.illus-tree {
    padding: 40px 32px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    text-align: center;
    margin-bottom: 40px;
}

.tree-root {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 10px 28px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 24px;
    position: relative;
}

.tree-root::after {
    content: '';
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 24px;
    background: var(--border);
}

.tree-branches {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 24px;
    position: relative;
}

.tree-branches::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 12.5%;
    width: 75%;
    height: 1px;
    background: var(--border);
}

.tree-node {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 16px 12px;
    position: relative;
}

.tree-node::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 12px;
    background: var(--border);
}

.tree-node.emergency { border-top: 2px solid #FF4C29; }
.tree-node.assisted  { border-top: 2px solid #FFB347; }
.tree-node.borderline { border-top: 2px solid #B8A898; }
.tree-node.general   { border-top: 2px solid var(--text-3); }

.node-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-2);
    margin-bottom: 8px;
    line-height: 1.3;
}

.node-action {
    font-size: 0.75rem;
    color: var(--accent);
    font-style: italic;
    font-family: var(--font-serif);
}

/* ====================================================
   ILLUSTRATION: MULTILINGUAL
   ==================================================== */
.illus-languages {
    padding: 40px 32px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    text-align: center;
}

.lang-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.lang-bubble {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 12px 16px;
    font-size: 0.9rem;
    color: var(--text-2);
    text-align: left;
    position: relative;
    line-height: 1.4;
}

.lang-bubble .lang-tag {
    display: block;
    font-size: 0.58rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    margin-bottom: 4px;
}

.lang-funnel {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 16px;
    line-height: 1;
}

.lang-result {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 12px 28px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ====================================================
   ILLUSTRATION: METRIC CARDS
   ==================================================== */
.illus-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 48px;
}

.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: 3px solid var(--accent);
    padding: 28px 20px;
    text-align: center;
}

.metric-num {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    font-style: italic;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 10px;
}

.metric-label {
    font-size: 0.72rem;
    color: var(--text-2);
    line-height: 1.4;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ====================================================
   CASE STUDY TABLE
   ==================================================== */
.cs-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 40px;
    font-size: 0.88rem;
}

.cs-table th {
    text-align: left;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
}

.cs-table td {
    padding: 14px 16px;
    color: var(--text-2);
    border-bottom: 1px solid var(--border-2);
    vertical-align: top;
    line-height: 1.6;
}

.cs-table td:first-child {
    color: var(--text);
    font-weight: 500;
    white-space: nowrap;
}

.cs-table tr:hover td { background: rgba(255,76,41,0.03); }

/* ====================================================
   PROTOTYPE LINK
   ==================================================== */
.cs-prototype {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    padding: 16px 36px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    transition: background 0.25s, box-shadow 0.25s;
}

.cs-prototype:hover {
    background: var(--text);
    box-shadow: 0 0 28px rgba(255,76,41,0.25);
}

/* ====================================================
   PREV / NEXT PROJECT NAV
   ==================================================== */
.cs-project-nav {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 40px var(--pad);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

.cs-project-nav a {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-3);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: color 0.2s, border-color 0.2s;
}

.cs-project-nav a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ====================================================
   PROBLEMS GRID
   ==================================================== */
.cs-problems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.cs-problem {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.problem-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.problem-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--text);
    line-height: 1.3;
}

.problem-desc {
    font-size: 0.88rem;
    color: var(--text-2);
    line-height: 1.7;
}

/* ====================================================
   RESPONSIVE
   ==================================================== */
/* ── Tablet (≤ 900px) ── */
@media (max-width: 900px) {
    .cs-two-col       { grid-template-columns: 1fr; gap: 40px; }
    .cs-two-col--flip { direction: ltr; }
    .illus-metrics    { grid-template-columns: 1fr 1fr; }
    .tree-branches    { grid-template-columns: 1fr 1fr; }
    .cs-problems-grid { grid-template-columns: 1fr; }
    .illus-personas   { grid-template-columns: 1fr; }
    .illus-urgency    { grid-template-columns: 1fr; }
    .urgency-eq       { display: none; }
}

/* ── Mobile (≤ 680px) ── */
@media (max-width: 680px) {
    .cs-hero          { padding: 32px 20px 52px; }
    .cs-section-inner { padding: 52px 20px; }

    .cs-title    { font-size: clamp(1.8rem, 7vw, 3rem); }
    .cs-subtitle { font-size: 0.95rem; }

    /* Hero banner containers — fixed height override */
    .cs-hero > div[style*="height:400px"],
    .cs-hero > div[style*="height:380px"] {
        height: 220px !important;
        overflow: hidden !important;
    }

    /* Hero SVG inside — fill and centre */
    .cs-hero > div[style*="height:400px"] svg,
    .cs-hero > div[style*="height:380px"] svg {
        width: 100% !important;
        height: 100% !important;
        display: block !important;
    }

    /* Hero photo (img) — full width, centred crop */
    .cs-hero > div img {
        width: 100% !important;
        height: 220px !important;
        object-fit: cover !important;
        object-position: center top !important;
        display: block !important;
    }

    /* Section illustrations — never overflow on mobile */
    .cs-illus,
    .illus-browsers,
    .illus-languages,
    .illus-stat,
    .illus-tree {
        overflow: hidden;
        max-width: 100%;
    }

    /* Table: horizontal scroll */
    .cs-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }

    /* Tags wrap nicely */
    .cs-tags { gap: 6px; }
    .cs-tags span { font-size: 0.6rem; padding: 4px 10px; }

    /* Metrics 2-col */
    .illus-metrics { grid-template-columns: 1fr 1fr; gap: 10px; }

    /* Problems grid single column */
    .cs-problems-grid { grid-template-columns: 1fr; }

    /* Personas */
    .illus-personas { grid-template-columns: 1fr 1fr; gap: 12px; }

    /* Tree branches */
    .tree-branches { grid-template-columns: 1fr; }

    /* Language bubbles */
    .lang-grid { grid-template-columns: 1fr; }

    /* Browser grid */
    .browser-grid { grid-template-columns: 1fr 1fr; }

    /* Project nav */
    .cs-project-nav { flex-direction: column; gap: 12px; padding: 32px 20px; }

    /* Blog illus SVGs — ensure they don't overflow */
    .blog-illus svg { overflow: visible; }
}

/* ── Small phone (≤ 480px) ── */
@media (max-width: 480px) {
    .cs-hero          { padding: 28px 16px 44px; }
    .cs-section-inner { padding: 40px 16px; }

    .cs-title    { font-size: clamp(1.6rem, 8vw, 2.4rem); }

    /* Hero images even shorter on tiny screens */
    .cs-hero > div[style*="height:400px"] { height: 180px !important; }
    .cs-hero > div[style*="height:380px"] { height: 160px !important; }

    /* Metrics single column */
    .illus-metrics  { grid-template-columns: 1fr; }
    .metric-card    { text-align: center; }
    .metric-num     { font-size: clamp(2.4rem, 12vw, 4rem); }

    /* Personas single column */
    .illus-personas { grid-template-columns: 1fr; }

    /* Chat mockup narrower */
    .chat-mockup { font-size: 0.8rem; }

    /* Stat big */
    .stat-big { font-size: clamp(3rem, 16vw, 5rem); }

    /* Back link */
    .cs-back { font-size: 0.65rem; }

    /* Section headings */
    .cs-section h2 { font-size: clamp(1.4rem, 6vw, 2rem); }
}