/* footprint.markets — Design Language Stylesheet */
/* Colors: Obsidian #0B0B0F, Deep Onyx #16161D, Antiquarian Gold #C9A84C, 
   Pale Gilding #E8D5A3, Carrara White #E8E4DF, Patina Green #4A7C6F,
   Warm Ivory #F0EBE1, Aged Silver #8A8578, Burnt Sienna #A0522D */

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: #0B0B0F;
    color: #F0EBE1;
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 18px;
    line-height: 1.72;
    font-weight: 400;
    font-feature-settings: 'kern' 1, 'liga' 1;
    overflow-x: hidden;
}

/* ============================================
   SCROLL PROGRESS INDICATOR
   ============================================ */

.scroll-progress {
    position: fixed;
    left: 5vw;
    top: 0;
    bottom: 0;
    width: 4px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 15vh 0;
    pointer-events: none;
}

.scroll-line {
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    height: 0%;
    background: #C9A84C;
    transform: translateX(-50%);
    transition: height 0.1s linear;
}

.scroll-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #8A8578;
    position: relative;
    z-index: 101;
    transition: all 0.3s ease-out;
    pointer-events: auto;
    cursor: pointer;
}

.scroll-dot:hover,
.scroll-dot.active {
    width: 12px;
    height: 12px;
    background: #C9A84C;
    box-shadow: 0 0 12px rgba(201, 168, 76, 0.6), 0 0 24px rgba(201, 168, 76, 0.3);
}

.scroll-dot.active {
    width: 10px;
    height: 10px;
}

/* ============================================
   STRATUM BASE
   ============================================ */

.stratum {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* ============================================
   OPENING STRATUM — Kinetic Typography
   ============================================ */

.stratum-opening {
    min-height: 100vh;
    justify-content: center;
    padding-left: 8vw;
    padding-right: 8vw;
    transform: rotate(-1.2deg);
    transform-origin: center center;
}

.stratum-opening__content {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
}

.kinetic-headline {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 500;
    font-style: italic;
    font-size: clamp(48px, 8vw, 140px);
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: #C9A84C;
    font-feature-settings: 'liga' 1, 'onum' 1;
    margin-bottom: 4vh;
    min-height: 1.1em;
}

.kinetic-headline .kinetic-char {
    display: inline-block;
    opacity: 0;
    transition: transform 2.4s cubic-bezier(0.23, 1, 0.32, 1), opacity 1.8s ease-out;
    will-change: transform, opacity;
}

.kinetic-headline .kinetic-char.assembled {
    opacity: 1;
    transform: translate(0, 0) !important;
}

.kinetic-headline .kinetic-space {
    display: inline;
    width: 0.3em;
}

.emissions-curve-container {
    width: 100%;
    max-width: 900px;
    margin-top: 6vh;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s ease-out 3.2s, transform 1.2s ease-out 3.2s;
}

.emissions-curve-container.visible {
    opacity: 1;
    transform: translateY(0);
}

.emissions-curve {
    width: 100%;
    height: auto;
}

.emissions-path {
    stroke-dasharray: 0;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.05s linear;
}

.curve-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 12px;
    font-weight: 500;
    fill: #8A8578;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-feature-settings: 'tnum' 1;
}

/* ============================================
   SECOND STRATUM — Scholarly Text + Marble Data
   ============================================ */

.stratum-second {
    min-height: 120vh;
    padding-left: 15vw;
    padding-right: 5vw;
    align-items: center;
}

.stratum-second__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: start;
    width: 100%;
    max-width: 1100px;
    position: relative;
}

.scholarly-text {
    padding-right: 4vw;
    padding-top: 5vh;
}

.body-text {
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 18px;
    line-height: 1.72;
    color: #F0EBE1;
    margin-bottom: 1.5em;
    font-feature-settings: 'kern' 1, 'liga' 1;
}

.body-text strong,
.body-text b {
    font-weight: 600;
}

.marble-data-block {
    position: relative;
    margin-top: -80px;
    margin-left: -4vw;
    padding: 3.5rem 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 280px;
    z-index: 2;
}

/* Marble Texture CSS Recipe */
.marble-slab {
    background:
        radial-gradient(ellipse at 23% 67%, rgba(138,133,120,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 78% 34%, rgba(138,133,120,0.12) 0%, transparent 45%),
        linear-gradient(37deg, rgba(138,133,120,0.08) 0%, transparent 40%),
        linear-gradient(142deg, rgba(138,133,120,0.06) 10%, transparent 50%),
        linear-gradient(89deg, rgba(201,168,76,0.03) 0%, transparent 30%),
        #E8E4DF;
    border-radius: 2px;
}

.data-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #8A8578;
    margin-bottom: 1rem;
    font-feature-settings: 'tnum' 1;
}

.data-value {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(42px, 5vw, 72px);
    font-weight: 600;
    font-style: italic;
    color: #0B0B0F;
    letter-spacing: -0.02em;
    font-feature-settings: 'liga' 1, 'onum' 1;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.data-caption {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: #A0522D;
    text-transform: uppercase;
    font-feature-settings: 'tnum' 1;
}

/* ============================================
   THIRD STRATUM — Cascading Narrative Cards
   ============================================ */

.stratum-third {
    min-height: 100vh;
    padding-left: 5vw;
    padding-right: 8vw;
    padding-top: 10vh;
    padding-bottom: 10vh;
    align-items: flex-start;
}

.stratum-third__cascade {
    display: flex;
    flex-direction: column;
    gap: 4vh;
    width: 100%;
    max-width: 900px;
    margin-left: auto;
}

.narrative-card {
    background: #16161D;
    padding: 3rem 3.5rem;
    position: relative;
    border-left: 2px solid #C9A84C;
}

.narrative-card--1 {
    transform: rotate(-0.8deg);
    margin-left: 0;
}

.narrative-card--2 {
    transform: rotate(0.4deg);
    margin-left: 6vw;
}

.narrative-card--3 {
    transform: rotate(0.8deg);
    margin-left: 2vw;
}

.card-chapter {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #C9A84C;
    display: block;
    margin-bottom: 0.75rem;
    font-feature-settings: 'tnum' 1;
}

.card-title {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(28px, 3vw, 42px);
    font-weight: 500;
    font-style: italic;
    color: #E8D5A3;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
    line-height: 1.2;
    font-feature-settings: 'liga' 1, 'onum' 1;
}

/* ============================================
   FINAL STRATUM — Closing Meditation
   ============================================ */

.stratum-final {
    min-height: 100vh;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: #0B0B0F;
    position: relative;
}

.particle-field {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: #C9A84C;
    opacity: 0;
    will-change: transform, opacity;
}

.closing-meditation {
    text-align: center;
    z-index: 2;
    padding: 0 8vw;
}

.meditation-text {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: clamp(28px, 4vw, 56px);
    font-weight: 500;
    font-style: italic;
    color: #E8D5A3;
    letter-spacing: -0.02em;
    line-height: 1.3;
    font-feature-settings: 'liga' 1, 'onum' 1;
}

.closing-footer {
    position: absolute;
    bottom: 4vh;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 2;
}

.footer-label {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #8A8578;
    font-feature-settings: 'tnum' 1;
}

.footer-year {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 14px;
    font-weight: 400;
    font-style: italic;
    color: #8A8578;
    letter-spacing: 0.1em;
}

/* ============================================
   FADE-IN ANIMATION
   ============================================ */

.fade-in-block {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-block.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Marble veil pseudo-element for sections */
.stratum-second::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 5%;
    width: 50%;
    height: 60%;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(138,133,120,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 40%, rgba(138,133,120,0.04) 0%, transparent 45%),
        linear-gradient(37deg, rgba(232,228,223,0.03) 0%, transparent 40%);
    filter: grayscale(20%) contrast(0.85);
    border-radius: 2px 47px 3px 52px;
    z-index: 0;
    pointer-events: none;
}

/* Weathered marble fragment for third stratum */
.stratum-third::before {
    content: '';
    position: absolute;
    top: 15%;
    right: 2%;
    width: 35%;
    height: 40%;
    background:
        radial-gradient(ellipse at 40% 60%, rgba(138,133,120,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 65% 30%, rgba(138,133,120,0.05) 0%, transparent 40%),
        linear-gradient(142deg, rgba(232,228,223,0.04) 0%, transparent 50%);
    filter: grayscale(20%) contrast(0.85);
    border-radius: 2px 47px 3px 52px;
    z-index: 0;
    pointer-events: none;
    opacity: 0.25;
}

/* ============================================
   PARTICLE KEYFRAMES
   ============================================ */

@keyframes particleOrbit1 {
    0% { transform: translate(0, 0); opacity: 0; }
    10% { opacity: 0.7; }
    50% { transform: translate(80px, -120px); opacity: 0.4; }
    90% { opacity: 0.6; }
    100% { transform: translate(0, 0); opacity: 0; }
}

@keyframes particleOrbit2 {
    0% { transform: translate(0, 0); opacity: 0; }
    15% { opacity: 0.5; }
    50% { transform: translate(-100px, 60px); opacity: 0.3; }
    85% { opacity: 0.6; }
    100% { transform: translate(0, 0); opacity: 0; }
}

@keyframes particleOrbit3 {
    0% { transform: translate(0, 0); opacity: 0; }
    20% { opacity: 0.6; }
    50% { transform: translate(60px, 90px); opacity: 0.35; }
    80% { opacity: 0.55; }
    100% { transform: translate(0, 0); opacity: 0; }
}

@keyframes particleOrbit4 {
    0% { transform: translate(0, 0); opacity: 0; }
    12% { opacity: 0.5; }
    50% { transform: translate(-70px, -80px); opacity: 0.25; }
    88% { opacity: 0.45; }
    100% { transform: translate(0, 0); opacity: 0; }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .stratum-opening {
        padding-left: 5vw;
        padding-right: 5vw;
        transform: rotate(-0.6deg);
    }

    .stratum-second {
        padding-left: 5vw;
        padding-right: 5vw;
    }

    .stratum-second__grid {
        grid-template-columns: 1fr;
        gap: 3vh;
    }

    .marble-data-block {
        margin-top: 0;
        margin-left: 0;
    }

    .stratum-third {
        padding-left: 3vw;
        padding-right: 3vw;
    }

    .narrative-card {
        padding: 2rem 2rem;
    }

    .narrative-card--1,
    .narrative-card--2,
    .narrative-card--3 {
        margin-left: 0;
        transform: none;
    }

    .scroll-progress {
        left: 2vw;
    }

    .kinetic-headline {
        font-size: clamp(32px, 10vw, 72px);
    }
}