/* ==========================================
   SOCIALHUB - PREMIUM UPGRADE V2
   Instagram + Facebook hybrid design
   ========================================== */

/* ---------- FONTS ---------- */

body {
    font-family: "Inter", Arial, Helvetica, sans-serif;
    letter-spacing: -0.01em;
}

/* ---------- SCROLLBAR ---------- */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(120, 120, 130, 0.35);
    border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(120, 120, 130, 0.55);
}

/* ---------- GRADIENT LOGO ---------- */

.logo {
    background: linear-gradient(135deg, #1877f2, #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    background-size: 200% 200%;
    animation: socialhubLogoShift 6s ease infinite;
}

@keyframes socialhubLogoShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ---------- CARDS ---------- */

.post,
.create-post,
.welcome-card,
.side-card,
.sidebar-menu,
.sidebar-profile,
.profile-card,
.profile-header,
.auth-card {
    box-shadow:
        0 1px 2px rgba(0, 0, 0, 0.04),
        0 4px 16px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(128, 128, 128, 0.08);
}

/* ---------- INSTAGRAM AVATAR RINGS ---------- */

:root {
    --avatar-bg: #e4e6eb;
}

body.dark-mode {
    --avatar-bg: #3a3b3c;
}

.avatar,
.sidebar-avatar,
.side-avatar,
.suggestion-avatar,
.profile-mini {
    background:
        linear-gradient(var(--avatar-bg), var(--avatar-bg)) padding-box,
        linear-gradient(135deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888) border-box;
    border: 2px solid transparent;
}

/* ---------- POST HOVER LIFT ---------- */

.post {
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
}

/* ---------- POST ENTRANCE ---------- */

.post {
    animation: socialhubPostIn 0.35s ease;
}

@keyframes socialhubPostIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

/* ---------- POST ACTIONS (4 buttons: like/comment/share/save) ---------- */

.post-actions {
    grid-template-columns: repeat(4, 1fr);
}

.post-actions button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.post-actions button i {
    font-size: 17px;
}

.socialhub-save-btn {
    color: var(--muted, #65676b);
}

.socialhub-save-btn.saved {
    color: #f09433;
}

/* ---------- DOUBLE-TAP HEART BURST ---------- */

.socialhub-heart-burst {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 68px;
    pointer-events: none;
    z-index: 50;
    animation: socialhubHeartBurst 0.8s ease forwards;
    filter: drop-shadow(0 4px 14px rgba(220, 39, 67, 0.4));
}

@keyframes socialhubHeartBurst {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.3);
    }

    30% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.15);
    }

    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1.5);
    }
}

/* ---------- REACTIONS (FACEBOOK STYLE) ---------- */

.post-actions button.socialhub-like-btn {
    position: relative;
    padding: 10px 6px;
}

.socialhub-reactions {
    display: none;
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: #ffffff;
    border-radius: 999px;
    padding: 10px 14px;
    gap: 4px;
    z-index: 1000;
    white-space: nowrap;
    box-shadow:
        0 2px 4px rgba(0, 0, 0, 0.1),
        0 8px 28px rgba(0, 0, 0, 0.2);
    border: none;
}

/* Arrow pointing down to the like button */

.socialhub-reactions::after {
    content: "";
    position: absolute;
    bottom: -7px;
    left: 50%;
    width: 13px;
    height: 13px;
    background: #ffffff;
    transform: translateX(-50%) rotate(45deg);
    box-shadow:
        3px 3px 5px rgba(0, 0, 0, 0.12);
}

.post-actions button.socialhub-like-btn:hover .socialhub-reactions,
.post-actions button.socialhub-like-btn:focus-within .socialhub-reactions {
    display: flex;
}

.post-actions .socialhub-reactions button {
    position: relative;
    width: 60px;
    height: 60px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 42px;
    line-height: 60px;
    border-radius: 50%;
    transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.4, 1.2);
    animation: socialhubReactionPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
}

.socialhub-reactions button:nth-child(1) {
    animation-delay: 0s;
}

.socialhub-reactions button:nth-child(2) {
    animation-delay: 0.03s;
}

.socialhub-reactions button:nth-child(3) {
    animation-delay: 0.06s;
}

.socialhub-reactions button:nth-child(4) {
    animation-delay: 0.09s;
}

.socialhub-reactions button:nth-child(5) {
    animation-delay: 0.12s;
}

.socialhub-reactions button:nth-child(6) {
    animation-delay: 0.15s;
}

.socialhub-reactions button:nth-child(7) {
    animation-delay: 0.18s;
}

.socialhub-reactions button:hover {
    transform: scale(1.3) translateY(-10px);
    z-index: 2;
}

/* Emoji name tooltip (dark bubble above each emoji) */

.socialhub-reactions button .socialhub-reaction-label {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: #1c1e21;
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
    line-height: 1;
    padding: 7px 11px;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.socialhub-reactions button .socialhub-reaction-label::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #1c1e21;
}

.socialhub-reactions button:hover .socialhub-reaction-label {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Reaction name inside the like button (colored like Facebook) */

.socialhub-reaction-emoji {
    font-size: 16px;
    margin-right: 4px;
}

.post-actions button.socialhub-like-btn .socialhub-reaction-name {
    font-weight: 700;
}

@keyframes socialhubReactionPop {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.3);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes socialhubReactionIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.socialhub-reaction-emoji {
    font-size: 17px;
}

.post-actions button.liked {
    color: #f23c5d !important;
    animation: socialhubHeartPop 0.35s ease;
}

@keyframes socialhubHeartPop {
    0% { transform: scale(1); }
    40% { transform: scale(1.35); }
    100% { transform: scale(1); }
}

/* ---------- STORIES BAR ---------- */

.socialhub-stories {
    display: flex;
    gap: 14px;
    overflow-x: auto;
    padding: 16px;
    background: var(--card-bg, #ffffff);
    border-radius: 12px;
    margin-bottom: 15px;
    box-shadow:
        0 1px 2px rgba(0, 0, 0, 0.04),
        0 4px 16px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(128, 128, 128, 0.08);
    scrollbar-width: none;
}

.socialhub-stories::-webkit-scrollbar {
    display: none;
}

.socialhub-story {
    flex: 0 0 auto;
    width: 68px;
    text-align: center;
    cursor: pointer;
}

.socialhub-story-ring {
    width: 64px;
    height: 64px;
    margin: 0 auto 6px;
    border-radius: 50%;
    padding: 3px;
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    position: relative;
}

.socialhub-story-avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--card-bg, #ffffff);
    border: 2px solid var(--card-bg, #ffffff);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.socialhub-story-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.socialhub-story-add {
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1877f2, #8b5cf6);
    color: #fff;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--card-bg, #ffffff);
}

.socialhub-story-name {
    display: block;
    font-size: 11px;
    color: var(--text, #1c1e21);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---------- STORY VIEWER ---------- */

.socialhub-story-viewer {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 100000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: socialhubStoryFade 0.25s ease;
}

@keyframes socialhubStoryFade {
    from { opacity: 0; }
    to { opacity: 1; }
}

.socialhub-story-stage {
    width: 100%;
    max-width: 420px;
    height: 100%;
    max-height: 760px;
    position: relative;
    border-radius: 0;
}

@media (min-width: 480px) {
    .socialhub-story-stage {
        height: min(85vh, 720px);
        border-radius: 16px;
        overflow: hidden;
    }
}

.socialhub-story-progress {
    display: flex;
    gap: 4px;
    padding: 12px 12px 8px;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 5;
}

.socialhub-story-seg {
    flex: 1;
    height: 3px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.3);
    overflow: hidden;
}

.socialhub-story-seg.fill .socialhub-story-seg-inner {
    height: 100%;
    background: #fff;
    animation: socialhubStoryProgress 4s linear forwards;
}

@keyframes socialhubStoryProgress {
    from { width: 0%; }
    to { width: 100%; }
}

.socialhub-story-head {
    position: absolute;
    top: 22px;
    left: 0;
    right: 0;
    padding: 0 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 5;
}

.socialhub-story-head .socialhub-story-ring {
    width: 40px;
    height: 40px;
    margin: 0;
}

.socialhub-story-head-info strong {
    display: block;
    color: #fff;
    font-size: 14px;
}

.socialhub-story-head-info small {
    color: rgba(255, 255, 255, 0.75);
    font-size: 12px;
}

.socialhub-story-close {
    margin-left: auto;
    width: 34px;
    height: 34px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
    font-size: 16px;
    cursor: pointer;
}

.socialhub-story-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #fff;
}

.socialhub-story-content .socialhub-story-ring {
    width: 120px;
    height: 120px;
}

.socialhub-story-content h3 {
    margin: 0;
    font-size: 22px;
}

.socialhub-story-content p {
    margin: 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
}

.socialhub-story-zone {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 50%;
    z-index: 4;
    cursor: pointer;
}

.socialhub-story-zone.prev {
    left: 0;
}

.socialhub-story-zone.next {
    right: 0;
}

/* ---------- BUTTONS ---------- */

button {
    -webkit-tap-highlight-color: transparent;
}

.login-btn,
.create-btn,
.post-btn,
.primary-btn,
.view-profile-btn,
.sidebar-logout,
.socialhub-btn-primary {
    transition:
        transform 0.15s ease,
        filter 0.15s ease,
        box-shadow 0.15s ease;
}

.login-btn:hover,
.create-btn:hover,
.post-btn:hover,
.primary-btn:hover,
.view-profile-btn:hover,
.socialhub-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(24, 119, 242, 0.25);
}

button:active {
    transform: scale(0.97);
}

/* ---------- GLASS TOPBAR ---------- */

.topbar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

body.dark-mode .topbar {
    background: rgba(36, 37, 38, 0.85);
}

/* ---------- SEARCH GLOW ---------- */

.search-box:focus-within {
    box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.18);
}

/* ---------- WELCOME CARD ---------- */

.welcome-card {
    background:
        linear-gradient(var(--card-bg, #ffffff), var(--card-bg, #ffffff)) padding-box,
        linear-gradient(135deg, #1877f2, #8b5cf6) border-box;
    border: 2px solid transparent;
    border-radius: 14px;
}

/* ---------- TOASTS ---------- */

.socialhub-toast-container {
    position: fixed;
    top: 76px;
    right: 18px;
    z-index: 100000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: calc(100vw - 36px);
}

.socialhub-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--card-bg, #ffffff);
    color: var(--text, #1c1e21);
    padding: 13px 16px;
    border-radius: 14px;
    box-shadow: 0 10px 34px rgba(0, 0, 0, 0.18);
    border: 1px solid rgba(128, 128, 128, 0.12);
    font-size: 14px;
    font-weight: 500;
    min-width: 260px;
    max-width: 380px;
    position: relative;
    overflow: hidden;
    animation: socialhubToastIn 0.3s ease;
}

.socialhub-toast.success {
    border-left: 4px solid #22c55e;
}

.socialhub-toast.error {
    border-left: 4px solid #ef4444;
}

.socialhub-toast.info {
    border-left: 4px solid #1877f2;
}

.socialhub-toast-icon {
    font-size: 18px;
}

.socialhub-toast-msg {
    flex: 1;
}

.socialhub-toast-close {
    border: none;
    background: transparent;
    color: var(--muted, #888);
    font-size: 16px;
    cursor: pointer;
    padding: 0 2px;
}

.socialhub-toast::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    width: 100%;
    background: linear-gradient(90deg, #1877f2, #8b5cf6);
    animation: socialhubToastBar 4s linear forwards;
}

.socialhub-toast.leaving {
    animation: socialhubToastOut 0.25s ease forwards;
}

@keyframes socialhubToastIn {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes socialhubToastOut {
    to {
        opacity: 0;
        transform: translateX(30px);
    }
}

@keyframes socialhubToastBar {
    from { width: 100%; }
    to { width: 0%; }
}

.socialhub-load-more {
    display: block;
    width: 100%;
    margin: 14px 0;
    padding: 12px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #1877f2, #8b5cf6);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}

.socialhub-load-more:disabled {
    opacity: 0.6;
    cursor: wait;
}

@media (max-width: 600px) {

    .socialhub-toast-container {
        left: 12px;
        right: 12px;
        align-items: stretch;
    }

    .socialhub-toast {
        width: 100%;
        min-width: 0;
    }
}

/* ---------- STORY REACTIONS (FACEBOOK STYLE) ---------- */

.socialhub-story-react {
    position: absolute;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 7px 10px;
    background: rgba(0, 0, 0, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 30px;
    z-index: 10;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
    animation: socialhubStoryReactIn 0.3s ease;
}

@keyframes socialhubStoryReactIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.socialhub-story-react-btn {
    width: 38px;
    height: 38px;
    border: none;
    border-radius: 50%;
    background: transparent;
    font-size: 24px;
    line-height: 38px;
    cursor: pointer;
    padding: 0;
    transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.4, 1.2);
}

.socialhub-story-react-btn:hover {
    transform: scale(1.35) translateY(-5px);
}

.socialhub-story-react-btn.active {
    background: rgba(255, 255, 255, 0.22);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.5);
}

/* Flying emoji after reacting */

.socialhub-story-fly {
    position: absolute;
    bottom: 90px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 44px;
    z-index: 12;
    pointer-events: none;
    animation: socialhubStoryFly 1s ease forwards;
}

@keyframes socialhubStoryFly {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(10px) scale(0.5);
    }

    25% {
        opacity: 1;
        transform: translateX(-50%) translateY(-10px) scale(1.15);
    }

    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(-110px) scale(1);
    }
}