/* ====================================================================
   Creativelines — Portfolio (frontend) — Phase 5
   ==================================================================== */


/* ============================================================
   PAGE HERO (listing top strip)
   ============================================================ */

.pf-pagehero {
    padding: clamp(5rem, 10vw, 8rem) 0 clamp(3rem, 5vw, 4rem);
    background: linear-gradient(180deg, var(--cl-black) 0%, color-mix(in srgb, var(--cl-black) 90%, var(--cl-yellow)) 100%);
    color: white;
    text-align: center;
}
.pf-pagehero__eyebrow {
    display: inline-block;
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: 700;
    color: var(--cl-yellow);
    margin-bottom: 1rem;
    padding: 0.4em 1em;
    border: 1px solid color-mix(in srgb, var(--cl-yellow) 50%, transparent);
    border-radius: 999px;
}
.pf-pagehero__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.25rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.035em;
    margin: 0 0 1rem;
    text-wrap: balance;
}
.pf-pagehero__title-sub {
    display: block;
    font-style: italic;
    color: var(--cl-yellow);
    font-size: 0.6em;
    margin-top: 0.3rem;
    letter-spacing: -0.02em;
}
.pf-pagehero__sub {
    font-size: clamp(1rem, 1.4vw, 1.2rem);
    color: rgba(255,255,255,0.85);
    margin: 0 auto;
    max-width: 38em;
    line-height: 1.55;
}


/* ============================================================
   FILTER CHIPS
   ============================================================ */

.pf-filters {
    background: var(--cl-bg);
    border-bottom: 1px solid var(--cl-border, rgba(0,0,0,0.08));
    padding: 1.25rem 0;
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
    background-color: color-mix(in srgb, var(--cl-bg) 90%, transparent);
}
.pf-filters__row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}
.pf-filters__sep {
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--cl-fg-subtle);
    font-weight: 600;
    margin-left: 0.5rem;
    margin-right: 0.25rem;
}
.pf-filters__sep:first-of-type { margin-left: 0; }

.pf-chip {
    --chip-color: var(--cl-yellow);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45em 1em;
    border: 1.5px solid var(--cl-border, rgba(0,0,0,0.1));
    border-radius: 999px;
    color: var(--cl-fg);
    background: transparent;
    text-decoration: none;
    font-size: var(--fs-sm);
    font-weight: 500;
    transition: all var(--t-base) var(--ease-out);
    line-height: 1.2;
}
.pf-chip:hover {
    border-color: var(--chip-color);
    color: var(--chip-color);
    transform: translateY(-1px);
}
.pf-chip.is-active {
    background: var(--chip-color);
    border-color: var(--chip-color);
    color: var(--cl-black);
}
.pf-chip__count {
    font-size: 10px;
    background: color-mix(in srgb, var(--cl-fg) 8%, transparent);
    padding: 0.18em 0.6em;
    border-radius: 999px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.pf-chip.is-active .pf-chip__count {
    background: rgba(0,0,0,0.15);
}


/* ============================================================
   GRID
   ============================================================ */

.pf-listing { padding: clamp(3rem, 6vw, 5rem) 0; }

.pf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}
@media (min-width: 1200px) {
    .pf-grid { grid-template-columns: repeat(3, 1fr); }
    .pf-card--feat { grid-column: span 2; }
    .pf-card--feat:nth-of-type(3n) { grid-column: span 1; }
}

.pf-card {
    position: relative;
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--cl-surface, white);
    transition: all 0.4s var(--ease-out);
}
.pf-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px -8px rgba(0,0,0,0.18);
}

.pf-card__inner {
    display: block;
    color: var(--cl-fg);
    text-decoration: none;
}

.pf-card__media {
    aspect-ratio: 4 / 3;
    background: var(--cl-bg);
    overflow: hidden;
    position: relative;
}
.pf-card--feat .pf-card__media { aspect-ratio: 16 / 9; }
.pf-card__media img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.8s var(--ease-out);
}
.pf-card:hover .pf-card__media img { transform: scale(1.05); }
.pf-card__media-empty {
    width: 100%; height: 100%;
    background: linear-gradient(135deg, var(--cl-yellow) 0%, var(--cl-red) 100%);
    opacity: 0.15;
}

.pf-card__body { padding: 1.25rem 1.5rem 1.5rem; }
.pf-card__cats {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.65rem;
}
.pf-card__cat {
    --chip-color: var(--cl-yellow);
    display: inline-flex;
    padding: 0.18em 0.7em;
    background: color-mix(in srgb, var(--chip-color) 14%, transparent);
    color: var(--chip-color);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.pf-card__title {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 1.8vw, 1.6rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 0.4rem;
    color: var(--cl-fg);
}
.pf-card--feat .pf-card__title { font-size: clamp(1.5rem, 2.2vw, 2rem); }
.pf-card__client {
    color: var(--cl-fg-muted);
    font-size: var(--fs-sm);
    margin-bottom: 1rem;
}
.pf-card__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--cl-fg);
    font-weight: 600;
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: all var(--t-base);
}
.pf-card:hover .pf-card__cta {
    color: var(--cl-red);
    transform: translateX(3px);
}
.pf-card__cta svg { width: 16px; height: 16px; transition: transform var(--t-base); }
.pf-card:hover .pf-card__cta svg { transform: translateX(2px); }


/* ============================================================
   EMPTY STATE
   ============================================================ */

.pf-empty {
    padding: 5rem 2rem;
    text-align: center;
    color: var(--cl-fg-muted);
}
.pf-empty svg {
    width: 56px; height: 56px;
    color: var(--cl-fg-subtle);
    margin-bottom: 1rem;
}
.pf-empty h3 {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    color: var(--cl-fg);
    margin-bottom: 0.5rem;
}
.pf-empty a { color: var(--cl-red); font-weight: 600; }


/* ============================================================
   PAGINATION
   ============================================================ */

.pf-pagination {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 3rem;
}
.pf-pagination__btn {
    min-width: 40px; height: 40px;
    padding: 0 0.9rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1.5px solid var(--cl-border, rgba(0,0,0,0.1));
    border-radius: var(--r-md);
    color: var(--cl-fg-muted);
    font-size: var(--fs-sm);
    text-decoration: none;
    transition: all var(--t-base);
}
.pf-pagination__btn:hover {
    border-color: var(--cl-yellow);
    color: var(--cl-yellow);
}
.pf-pagination__btn.is-active {
    background: var(--cl-yellow);
    border-color: var(--cl-yellow);
    color: var(--cl-black);
    font-weight: 600;
}


/* ====================================================================
   CASE STUDY SINGLE PAGE
   ==================================================================== */

/* ============================================================
   COVER
   ============================================================ */

.cs-cover {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    background: var(--cl-black);
    color: white;
    padding: 8rem 0 4rem;
}
.cs-cover__media,
.cs-cover__overlay,
.cs-cover__noimage {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.cs-cover__media img {
    width: 100%; height: 100%;
    object-fit: cover;
}
.cs-cover__overlay {
    background: linear-gradient(180deg,
        rgba(0,0,0,0.3) 0%,
        rgba(0,0,0,0.55) 60%,
        rgba(0,0,0,0.9) 100%);
}
.cs-cover__noimage {
    background: linear-gradient(135deg, var(--cl-black) 0%, color-mix(in srgb, var(--cl-yellow) 30%, var(--cl-black)) 100%);
}
.cs-cover .cl-container { position: relative; z-index: 1; }

.cs-cover__content { max-width: 900px; }
.cs-cover__tags {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}
.cs-cover__tag {
    display: inline-flex;
    padding: 0.32em 1em;
    background: color-mix(in srgb, var(--chip-color, var(--cl-yellow)) 22%, transparent);
    color: var(--chip-color, var(--cl-yellow));
    border: 1px solid color-mix(in srgb, var(--chip-color, var(--cl-yellow)) 50%, transparent);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    --chip-color: var(--cl-yellow);
}
.cs-cover__title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6.5vw, 5.5rem);
    font-weight: 700;
    line-height: 1.02;
    letter-spacing: -0.04em;
    margin: 0;
    text-wrap: balance;
}
.cs-cover__sub {
    font-size: clamp(1.1rem, 1.8vw, 1.4rem);
    color: rgba(255,255,255,0.85);
    margin: 1rem 0 0;
    max-width: 42em;
    line-height: 1.45;
}


/* ============================================================
   META STRIP
   ============================================================ */

.cs-meta {
    padding: 2.5rem 0;
    background: color-mix(in srgb, var(--cl-yellow) 6%, var(--cl-bg));
    border-bottom: 1px solid var(--cl-border, rgba(0,0,0,0.06));
}
.cs-meta__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2rem;
}
.cs-meta__item--wide { grid-column: span 2; }
@media (max-width: 720px) { .cs-meta__item--wide { grid-column: span 1; } }
.cs-meta__label {
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--cl-fg-subtle);
    font-weight: 700;
    margin-bottom: 0.3rem;
}
.cs-meta__value {
    font-size: var(--fs-md);
    color: var(--cl-fg);
    font-weight: 500;
}
.cs-meta__value a { color: var(--cl-red); }


/* ============================================================
   NARRATIVE
   ============================================================ */

.cs-narrative {
    padding: clamp(3rem, 6vw, 5rem) 0;
}
.cs-summary {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 2.4vw, 1.85rem);
    line-height: 1.4;
    font-weight: 400;
    color: var(--cl-fg);
    max-width: 38em;
    margin: 0 auto 3rem;
    text-wrap: balance;
}
.cs-body {
    max-width: 38em;
    margin: 0 auto;
    font-size: var(--fs-md);
    line-height: 1.75;
    color: var(--cl-fg);
}
.cs-body h2 {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 2.5vw, 2rem);
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    letter-spacing: -0.02em;
}
.cs-body h3 {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 600;
    margin: 2rem 0 0.75rem;
}
.cs-body p { margin: 0 0 1.25rem; }
.cs-body blockquote {
    border-left: 3px solid var(--cl-yellow);
    padding: 0.75rem 0 0.75rem 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    font-size: 1.15em;
    color: var(--cl-fg-muted);
}
.cs-body ul, .cs-body ol { margin: 1.25rem 0 1.25rem 1.5rem; }
.cs-body li { margin-bottom: 0.4rem; }
.cs-body a { color: var(--cl-red); text-decoration: underline; }


/* ============================================================
   VIDEO
   ============================================================ */

.cs-video {
    padding: 0 0 clamp(3rem, 6vw, 5rem);
}
.cs-video__wrap {
    aspect-ratio: 16 / 9;
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--cl-black);
    max-width: 1200px;
    margin: 0 auto;
}
.cs-video__wrap iframe {
    width: 100%;
    height: 100%;
    border: 0;
}


/* ============================================================
   METRICS
   ============================================================ */

.cs-metrics {
    padding: clamp(3rem, 6vw, 5rem) 0;
    background: var(--cl-black);
    color: white;
}
.cs-metrics__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
}
.cs-metrics__grid--1 { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; text-align: center; }
.cs-metrics__grid--2 { grid-template-columns: repeat(2, 1fr); }
.cs-metrics__grid--3 { grid-template-columns: repeat(3, 1fr); }
.cs-metrics__grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 720px) {
    .cs-metrics__grid--3, .cs-metrics__grid--4 { grid-template-columns: repeat(2, 1fr); }
}

.cs-metric { text-align: center; }
.cs-metric__value {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--cl-yellow);
    margin-bottom: 0.5rem;
    display: inline-flex;
    align-items: baseline;
    gap: 0.1em;
}
.cs-metric__prefix, .cs-metric__suffix {
    font-size: 0.55em;
    font-weight: 600;
    opacity: 0.85;
}
.cs-metric__label {
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-weight: 600;
    color: rgba(255,255,255,0.85);
}
.cs-metric__note {
    font-size: var(--fs-xs);
    color: rgba(255,255,255,0.5);
    margin-top: 0.4rem;
    line-height: 1.4;
}


/* ============================================================
   GALLERY
   ============================================================ */

.cs-gallery {
    padding: clamp(2rem, 5vw, 4rem) 0;
}
.cs-gallery__row {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}
.cs-gallery__row--full { grid-template-columns: 1fr; }
.cs-gallery__row--half { grid-template-columns: 1fr 1fr; }
.cs-gallery__row--third { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 720px) {
    .cs-gallery__row--half,
    .cs-gallery__row--third { grid-template-columns: 1fr; }
}

.cs-gallery__item {
    margin: 0;
    border-radius: var(--r-md);
    overflow: hidden;
    background: var(--cl-bg);
}
.cs-gallery__item img,
.cs-gallery__item video {
    width: 100%;
    height: auto;
    display: block;
}
.cs-gallery__item figcaption {
    padding: 0.75rem 1rem 1rem;
    font-size: var(--fs-sm);
    color: var(--cl-fg-muted);
    line-height: 1.5;
}


/* ============================================================
   NEXT / PREV NAV
   ============================================================ */

.cs-nav {
    padding: clamp(3rem, 6vw, 5rem) 0;
    border-top: 1px solid var(--cl-border, rgba(0,0,0,0.08));
}
.cs-nav__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
@media (max-width: 720px) {
    .cs-nav__grid { grid-template-columns: 1fr; }
}
.cs-nav__card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--cl-bg);
    border: 1px solid var(--cl-border, rgba(0,0,0,0.08));
    border-radius: var(--r-lg);
    text-decoration: none;
    color: var(--cl-fg);
    transition: all var(--t-base) var(--ease-out);
}
.cs-nav__card:hover {
    transform: translateY(-3px);
    border-color: var(--cl-yellow);
    box-shadow: var(--shadow-md);
}
.cs-nav__card--next { text-align: right; flex-direction: row-reverse; }
.cs-nav__thumb {
    width: 100px; height: 75px;
    border-radius: var(--r-sm);
    object-fit: cover;
    flex-shrink: 0;
}
.cs-nav__body { min-width: 0; flex: 1; }
.cs-nav__direction {
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--cl-red);
    font-weight: 700;
    margin-bottom: 0.3rem;
}
.cs-nav__title {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}


/* ============================================================
   RELATED
   ============================================================ */

.cs-related {
    padding: clamp(3rem, 6vw, 5rem) 0;
    background: color-mix(in srgb, var(--cl-yellow) 4%, var(--cl-bg));
}