/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: #f5efe0;
    color: #3d2b1f;
    font-family: 'Libre Baskerville', serif;
    font-size: 1.05rem;
    line-height: 1.75;
    overflow-x: hidden;
}

/* === Gold Vertical Rule === */
.gold-rule {
    position: fixed;
    left: 8vw;
    top: 0;
    width: 1px;
    height: 0;
    background: #b8860b;
    z-index: 10;
    pointer-events: none;
}

.gold-rule.animate {
    height: 100vh;
    transition: height 800ms ease-in-out;
}

/* === Navigation Monogram === */
.nav-monogram {
    position: fixed;
    top: 2vh;
    left: 2vw;
    font-family: 'Poiret One', cursive;
    font-size: 2rem;
    color: #b8860b;
    cursor: pointer;
    z-index: 100;
    transition: color 300ms ease;
    user-select: none;
}

.nav-monogram:hover {
    color: #d4a04a;
}

/* === Navigation Overlay === */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #2c1e10;
    z-index: 90;
    transform: translateX(-100%);
    transition: transform 400ms cubic-bezier(0.77, 0, 0.175, 1);
}

.nav-overlay.open {
    transform: translateX(0);
}

.nav-overlay-inner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
    padding-left: 12vw;
}

.nav-close {
    position: absolute;
    top: 2vh;
    right: 4vw;
    font-size: 2.5rem;
    color: #f5efe0;
    cursor: pointer;
    font-family: 'Poiret One', cursive;
    transition: color 300ms ease;
}

.nav-close:hover {
    color: #d4a04a;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.nav-link {
    font-family: 'Poiret One', cursive;
    font-size: 2.5rem;
    color: #f5efe0;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 400ms ease, transform 400ms ease, color 300ms ease;
}

.nav-overlay.open .nav-link {
    opacity: 1;
    transform: translateX(0);
}

.nav-overlay.open .nav-link:nth-child(1) { transition-delay: 100ms; }
.nav-overlay.open .nav-link:nth-child(2) { transition-delay: 200ms; }
.nav-overlay.open .nav-link:nth-child(3) { transition-delay: 300ms; }
.nav-overlay.open .nav-link:nth-child(4) { transition-delay: 400ms; }
.nav-overlay.open .nav-link:nth-child(5) { transition-delay: 500ms; }

.nav-link:hover {
    color: #d4a04a;
}

.nav-line {
    display: inline-block;
    width: 0;
    height: 1px;
    background: #b8860b;
    transition: width 400ms ease;
}

.nav-overlay.open .nav-line {
    width: 60px;
}

.nav-overlay.open .nav-link:nth-child(1) .nav-line { transition-delay: 200ms; }
.nav-overlay.open .nav-link:nth-child(2) .nav-line { transition-delay: 300ms; }
.nav-overlay.open .nav-link:nth-child(3) .nav-line { transition-delay: 400ms; }
.nav-overlay.open .nav-link:nth-child(4) .nav-line { transition-delay: 500ms; }
.nav-overlay.open .nav-link:nth-child(5) .nav-line { transition-delay: 600ms; }

/* === Sections === */
.section {
    position: relative;
    min-height: 100vh;
    padding: 10vh 4vw;
}

.section-hero {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.hero-content {
    margin-left: 12vw;
    opacity: 0;
    transform: translateY(10px);
}

.hero-content.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 500ms ease, transform 500ms ease;
}

.hero-title {
    font-family: 'Poiret One', cursive;
    font-size: clamp(4rem, 8vw, 8rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #3d2b1f;
    line-height: 1.1;
}

.hero-subtitle {
    font-family: 'Libre Baskerville', serif;
    font-style: italic;
    font-size: 1.1rem;
    color: #a08060;
    margin-top: 1rem;
    opacity: 0;
    transform: translateY(10px);
}

.hero-subtitle.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 500ms ease, transform 500ms ease;
}

/* === Compass Rose === */
.compass-rose {
    position: absolute;
    right: 15vw;
    bottom: 20vh;
    opacity: 0;
}

.compass-rose.visible {
    opacity: 1;
    transition: opacity 1400ms ease;
}

.compass-rose .compass-line,
.compass-rose .compass-circle {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
}

.compass-rose.visible .compass-line,
.compass-rose.visible .compass-circle {
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1400ms ease-out;
}

.compass-rose .compass-point {
    opacity: 0;
}

.compass-rose.visible .compass-point {
    opacity: 1;
    transition: opacity 600ms ease 1000ms;
}

.compass-rose-final {
    position: relative;
    right: auto;
    bottom: auto;
    margin: 6vh auto 0;
    display: block;
}

/* === Diamond Divider === */
.diamond-divider {
    display: flex;
    justify-content: center;
    padding: 4vh 0;
}

.diamond-divider span {
    display: block;
    width: 12px;
    height: 12px;
    background: #b8860b;
    transform: rotate(45deg);
}

/* === Section Headings === */
.section-heading {
    font-family: 'Poiret One', cursive;
    font-size: clamp(2.8rem, 5.5vw, 6rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #3d2b1f;
    margin-left: 12vw;
    margin-bottom: 4vh;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.section-heading.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* === Card Flip === */
.section-cards {
    position: relative;
    min-height: 100vh;
}

.card-flip {
    position: absolute;
    width: 285px;
    height: 380px;
    perspective: 1200px;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.card-flip.revealed {
    opacity: 1;
    transform: translateY(0);
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 600ms cubic-bezier(0.23, 1, 0.32, 1);
}

.card-flip.flipped .card-inner {
    transform: rotateY(180deg);
}

.card-flip.flipped .card-inner {
    box-shadow: 0 0 20px 2px #d4a04a40;
}

.card-front,
.card-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border: 1px solid #b8860b;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.card-front {
    background: #f5efe0;
}

.card-back {
    background: #2c1e10;
    color: #f5efe0;
    transform: rotateY(180deg);
    font-size: 0.95rem;
    line-height: 1.7;
}

.card-back p {
    font-family: 'Libre Baskerville', serif;
}

.card-fan {
    margin-bottom: 1.5rem;
    opacity: 0.85;
}

.card-title {
    font-family: 'Poiret One', cursive;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 400;
    color: #3d2b1f;
    margin-bottom: 0.5rem;
    text-align: center;
}

.card-date {
    font-family: 'DM Mono', monospace;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: #a08060;
}

/* Amber glow on flip */
@keyframes amberGlow {
    0% { box-shadow: 0 0 0 0 transparent; }
    50% { box-shadow: 0 0 25px 4px #d4a04a60; }
    100% { box-shadow: 0 0 0 0 transparent; }
}

.card-flip.glow .card-inner {
    animation: amberGlow 400ms ease;
}

/* === Corner Marks === */
.corner-mark {
    position: absolute;
    width: 24px;
    height: 24px;
}

.corner-tl {
    top: 0;
    left: 0;
    border-top: 1px solid #a08060;
    border-left: 1px solid #a08060;
}

.corner-br {
    bottom: 0;
    right: 0;
    border-bottom: 1px solid #a08060;
    border-right: 1px solid #a08060;
}

/* === Closing Section === */
.section-closing {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 100vh;
}

.closing-content {
    position: relative;
    max-width: 600px;
    padding: 4rem;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 700ms ease, transform 700ms ease;
}

.closing-content.revealed {
    opacity: 1;
    transform: translateY(0);
}

.closing-title {
    font-family: 'Poiret One', cursive;
    font-size: clamp(2.8rem, 5.5vw, 5rem);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #3d2b1f;
    margin-bottom: 2rem;
}

.closing-text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: #3d2b1f;
    margin-bottom: 2rem;
}

.closing-attribution {
    font-family: 'DM Mono', monospace;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: #a08060;
}

/* === Decorative Geometry === */
.decorative-geo {
    display: flex;
    justify-content: center;
    padding: 2vh 0;
    opacity: 0;
    transition: opacity 800ms ease;
}

.decorative-geo.revealed {
    opacity: 1;
}

.geo-arcs-1 {
    margin-left: 50vw;
}

.geo-grid-1 {
    margin-right: 30vw;
}

.geo-arcs-2 {
    margin-left: 40vw;
}

.arc-path {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    transition: stroke-dashoffset 1200ms ease-out;
}

.decorative-geo.revealed .arc-path {
    stroke-dashoffset: 0;
}

/* === Mobile Responsive === */
@media (max-width: 768px) {
    .card-flip {
        position: relative !important;
        left: auto !important;
        top: auto !important;
        margin: 3vh auto;
        width: 260px;
        height: 350px;
    }

    .section-cards {
        min-height: auto;
        display: flex;
        flex-direction: column;
        padding-top: 8vh;
        padding-bottom: 8vh;
    }

    .section-heading {
        margin-left: 12vw;
        margin-bottom: 2vh;
    }

    .hero-content {
        margin-left: 14vw;
    }

    .nav-link {
        font-size: 1.8rem;
    }

    .closing-content {
        padding: 2rem;
    }

    .compass-rose {
        right: 5vw;
        bottom: 10vh;
        width: 140px;
        height: 140px;
    }
}