body {
    font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #05060d;
    color: #f2f2f5;
    margin: 0;
}

.letter-spacing {
    letter-spacing: 0.3em;
}

.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: transparent;
}

.app-shell header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: linear-gradient(135deg, #1d0f34, #2d1a5e, #1e3a8a, #a855f7);
    background-size: 400% 400%;
    animation: header-gradient 10s ease infinite;
}

.header-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.8rem;
    color: #fff;
}
.header-icon i {
    font-size: 0.9rem;
}

.header-profile-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.1rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.03);
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.header-profile-link:hover,
.header-profile-link:focus-visible {
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.6);
}

.header-profile-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}

@keyframes header-gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.feed-shell {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.guest-login-link {
    width: 100%;
    position: sticky;
    bottom: 56px;
    background: rgba(3, 3, 9, 0.85);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.guest-login-link a {
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}

.observer-suggestions {
    position: absolute;
    top: 110%;
    left: 0;
    right: 0;
    background: rgba(3, 3, 9, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
    max-height: 220px;
    overflow-y: auto;
    z-index: 20;
}
.observer-suggestions button {
    width: 100%;
    border: none;
    background: transparent;
    color: #fff;
    padding: 0.5rem 0.75rem;
    text-align: left;
}
.observer-suggestions button:hover {
    background: rgba(255, 255, 255, 0.05);
}

.feed-loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 4;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feed-spinner-border {
    width: 3.5rem;
    height: 3.5rem;
    border: 0.4rem solid rgba(255, 255, 255, 0.15);
    border-top-color: #f472b6;
    border-radius: 50%;
    animation: spin-fast 0.8s linear infinite;
}

@keyframes spin-fast {
    to {
        transform: rotate(360deg);
    }
}

.uploader-avatar {
    margin-bottom: 0.5rem;
}
.uploader-avatar img {
    width: 56px;
    height: 56px;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.action-avatar img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.4);
    display: block;
    margin: 0 auto;
}
.metadata-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-top: 0.5rem;
}
.tag-pill {
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}
.action-avatar .fa-stack {
    line-height: 0;
    width: 48px;
    margin: 0 auto;
}


.upload-spinner-overlay {
    position: fixed;
    inset: 0;
    z-index: 60;
    background: rgba(3, 3, 9, 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    text-align: center;
}

.upload-spinner-border {
    width: 3rem;
    height: 3rem;
    border: 0.4rem solid rgba(255, 255, 255, 0.2);
    border-top-color: #60a5fa;
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.feed-stack {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    scroll-snap-type: y mandatory;
    scroll-snap-stop: always;
    padding-bottom: 80px;
    scroll-behavior: smooth;
}
.feed-card {
    position: relative;
    scroll-snap-align: start;
    margin-bottom: 1rem;
    min-height: calc(100vh - 110px);
    height: calc(100vh - 110px);
    border-radius: 1rem;
    overflow: hidden;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    color: #fff;
}

.image-wrap {
    position: relative;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    max-height: calc(100vh - 200px);
}

.feed-card .feed-image {
    width: 100%;
    height: auto;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

body.controls-hidden .action-column {
    opacity: 0;
    pointer-events: none;
    transform: translateX(10px);
}

.toggle-actions-btn {
    position: absolute;
    left: 12px;
    bottom: 0.25rem;
    z-index: 6;
    padding: 0.35rem 0.9rem;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(8, 10, 18, 0.85);
    color: #fff;
    text-transform: uppercase;
    transition: transform 0.15s ease;
}

.toggle-actions-btn:hover {
    transform: translateY(-1px);
}


.floating-heart {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    font-size: 3rem;
    color: #ef4444;
    opacity: 0;
    pointer-events: none;
    z-index: 7;
}

.floating-heart.visible {
    animation: heart-pop 0.7s ease-out forwards;
}

.metadata-actions {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 0.75rem;
}

@keyframes heart-pop {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -48%) scale(1.2);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -35%) scale(1.6);
    }
}

.metadata-card {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(5, 6, 13, 0.95);
    color: #fff;
    padding: 0.6rem 0.9rem;
    margin-top: 0;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.metadata-card .meta-info {
    color: #fff;
    font-size: 0.75rem;
    letter-spacing: 0.01em;
}

.action-column {
    position: absolute;
    top: 16px;
    right: 10px;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    z-index: 5;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.action-icon {
    min-width: 60px;
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: transparent;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-decoration: none;
}

.action-icon.share {
    display: none;
    border-color: rgba(59, 130, 246, 0.4);
    background: rgba(59, 130, 246, 0.1);
}

@media (max-width: 992px) {
    .action-icon.share {
        display: flex;
    }
}

.action-icon.active {
    border-color: #ec4899;
    background: rgba(236, 72, 153, 0.1);
    transform: translateY(-1px);
}

.action-icon .action-count {
    font-size: 0.65rem;
    margin-top: 2px;
    color: #fff;
}

.action-icon[data-action="delete-image"] span {
    color: #f87171;
}

.bottom-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: rgba(5, 6, 13, 0.95);
    padding: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    bottom: 0;
    z-index: 20;
}

.bottom-nav-link {
    color: rgba(255, 255, 255, 0.65);
    text-align: center;
    font-size: 0.8rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 0;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.bottom-nav-link:last-child {
    border-right: none;
}

.bottom-nav-link:hover,
.bottom-nav-link.nav-label.is-active {
    background: rgba(255, 255, 255, 0.03);
    color: #fff;
}

.feed-sentinel {
    height: 20px;
    width: 100%;
}

.comments-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #0b1833;
    border-top-left-radius: 1rem;
    border-top-right-radius: 1rem;
    border: 1px solid rgba(14, 165, 233, 0.7);
    box-shadow: 0 -10px 25px rgba(14, 165, 233, 0.45);
    z-index: 30;
    max-height: 70vh;
    display: flex;
    flex-direction: column;
}

.comments-header {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
}

.comments-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 1rem;
    color: #fff;
}

.shared-page {
    min-height: calc(100vh - 112px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
}

.shared-card {
    width: 100%;
    max-width: 900px;
    padding: 0;
    text-align: center;
    background: transparent;
}

.shared-image-wrapper {
    padding: 0;
    background: transparent;
    border-radius: 0;
}

.shared-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 1rem;
}

.shared-metadata {
    text-align: center;
}

.auth-space {
    min-height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at top, rgba(14, 165, 233, 0.15), transparent 45%),
        radial-gradient(circle at 20% 20%, rgba(248, 113, 113, 0.2), transparent 30%),
        #03040d;
}

.auth-space::before,
.auth-space::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.35) 1px, transparent 1px);
    background-size: 120px 120px;
    opacity: 0.35;
    animation: drift 20s linear infinite;
}

.auth-space::after {
    background-size: 200px 200px;
    opacity: 0.15;
    animation-duration: 30s;
}

.auth-grid {
    position: relative;
    display: grid;
    gap: 2rem;
    padding: 4rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.auth-form {
    background: transparent;
    border: none;
    padding: 0;
    box-shadow: none;
}

.auth-input {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.auth-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
    opacity: 1;
}

.btn-gradient {
    background: linear-gradient(135deg, #6366f1, #ec4899);
    border: none;
    color: #fff;
    font-weight: 600;
    padding: 0.9rem 1.25rem;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4);
}

.auth-blurb h1 {
    font-size: 2.5rem;
    letter-spacing: 0.3em;
}

.auth-blurb .header-icon.large {
    width: 56px;
    height: 56px;
    font-size: 1.2rem;
    margin: 0 auto 1rem;
}

.auth-panel .header-icon.large {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.auth-panel .header-icon.large img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.auth-panel .auth-blurb {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.auth-space::before {
    filter: blur(2px);
}

.auth-space::after {
    filter: blur(4px);
}

.auth-space .auth-grid::before {
    content: "";
    position: absolute;
    inset: 1rem;
    border-radius: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    pointer-events: none;
}

.auth-space .auth-grid .auth-panel {
    position: relative;
    z-index: 2;
}

@keyframes drift {
    from {
        transform: translate3d(0, 0, 0);
    }
    to {
        transform: translate3d(-30px, -60px, 0);
    }
}

.comment-row {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: #fff;
}

.comment-row strong,
.comment-row p,
.comments-sheet .toast,
.comments-sheet label {
    color: #fff;
}

.comment-row .text-muted {
    color: #d2e5ff !important;
}

.comments-sheet textarea,
.comments-sheet button,
.comments-sheet .form-control,
.comments-sheet .btn {
    color: #fff;
}

.comment-row:last-child {
    border-bottom: none;
}

.comment-row strong,
.comment-row p {
    color: #fff;
}

.profile-avatar {
    width: 140px;
    height: 140px;
    object-fit: cover;
    display: block;
    margin: 0 auto 1rem;
}

.profile-bio-helper {
    color: #fff;
}

.profile-bio-helper.text-muted {
    color: #fff !important;
}

.auth-shell {
    min-height: calc(100vh - 56px);
    padding: 3rem 1rem;
}

.auth-card {
    max-width: 420px;
    margin: 0 auto;
}

input::placeholder,
textarea::placeholder,
select::placeholder {
    color: rgba(255, 255, 255, 0.5);
    opacity: 1;
}

.toast.toast-blue {
    background: linear-gradient(135deg, #1d4ed8, #60a5fa);
    color: #fff;
    border: 0;
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.6);
}

.toast.toast-blue .toast-body {
    font-weight: 500;
}

.toast.toast-blue .progress {
    display: none;
}

.toast-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 2px;
    width: 100%;
    background: rgba(255, 255, 255, 0.65);
    transition: width 0s linear;
}