:root {
    --bg: #05060b;
    --bg-gradient-top: #0b0f23;
    --bg-gradient-bottom: #05060b;
    --card: rgba(17, 23, 45, 0.85);
    --card-border: rgba(255,255,255,0.08);
    --border: rgba(255,255,255,0.08);
    --text: #f5f7ff;
    --text-muted: #9da9c6;
    --primary: #7c3aed;
    --primary-hover: #a855f7;
    --secondary: #ec4899;
    --accent: #22d3ee;
    --success: #34d399;
    --danger: #f87171;
    --warning: #facc15;
}

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

html {
    overflow-y: scroll;
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: radial-gradient(circle at top, var(--bg-gradient-top), var(--bg-gradient-bottom));
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background-attachment: fixed;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}

/* Header */
.header {
    background: rgba(5, 6, 11, 0.7);
    border-bottom: 1px solid var(--card-border);
    padding: 15px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
}

.header-content {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    text-shadow: 0 2px 10px rgba(124, 58, 237, 0.4);
}

.nav-links {
    display: flex;
    gap: 15px;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 14px;
    padding: 6px 12px;
    border-radius: 999px;
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-dollars {
    color: var(--success);
    font-weight: bold;
}

.user-points {
    color: var(--warning);
    font-weight: bold;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
}

.btn-secondary {
    background: rgba(255,255,255,0.08);
    color: var(--text);
}

.btn-secondary:hover {
    background: #3a3a3a;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-small {
    padding: 5px 12px;
    font-size: 12px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 16px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    overflow: hidden;
    margin-bottom: 22px;
    box-shadow: 0 25px 70px rgba(2, 6, 23, 0.45);
}

.card-header {
    padding: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
}

.author-name {
    font-weight: 600;
}

.author-stats {
    font-size: 12px;
    color: var(--text-muted);
}

.card-image {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.card-body {
    padding: 18px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--text-muted);
    font-size: 13px;
}

.tagged-user {
    color: var(--primary);
}

/* Voting */
.vote-section {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-top: 1px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.02);
}

.vote-btn {
    background: rgba(255,255,255,0.06);
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 6px 12px;
}

.vote-btn:hover {
    background: var(--border);
}

.vote-btn.upvote {
    color: var(--text-muted);
}

.vote-btn.upvote.active,
.vote-btn.upvote:hover {
    border-color: rgba(52, 211, 153, 0.5);
    color: var(--success);
    box-shadow: 0 0 12px rgba(52, 211, 153, 0.3);
}

.vote-btn.downvote {
    color: var(--text-muted);
}

.vote-btn.downvote.active,
.vote-btn.downvote:hover {
    border-color: rgba(248, 113, 113, 0.5);
    color: var(--danger);
    box-shadow: 0 0 12px rgba(248, 113, 113, 0.3);
}

.vote-count {
    font-weight: bold;
    min-width: 30px;
    text-align: center;
}

.dollar-count {
    margin-left: auto;
    color: var(--accent);
    font-weight: 600;
}

/* Comments */
.comments-section {
    padding: 15px;
    border-top: 1px solid var(--border);
}

.comment {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

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

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.comment-author {
    font-weight: 600;
    font-size: 14px;
}

.comment-time {
    font-size: 12px;
    color: var(--text-muted);
}

.comment-text {
    font-size: 14px;
    color: var(--text);
}

.comment-vote {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 5px;
}

.comment-vote .vote-btn {
    font-size: 14px;
    padding: 2px 5px;
}

.comment-form {
    margin-top: 15px;
    display: flex;
    gap: 10px;
}

.comment-form input {
    flex: 1;
    padding: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
}

/* Profile */
.profile-header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, rgba(124,58,237,0.4), rgba(236,72,153,0.25));
    border-radius: 18px;
    margin-bottom: 20px;
    border: 1px solid rgba(255,255,255,0.12);
    box-shadow: 0 20px 50px rgba(124,58,237,0.25);
}

.profile-avatar {
    width: 108px;
    height: 108px;
    border-radius: 50%;
    background: rgba(255,255,255,0.18);
    border: 2px solid rgba(255,255,255,0.2);
}

.profile-name {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;
}

.profile-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
}

.profile-actions {
    margin-top: 20px;
}

/* Messages */
.conversation-list {
    background: var(--card);
    border-radius: 12px;
    overflow: hidden;
}

.conversation-item {
    padding: 15px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: background 0.2s;
}

.conversation-item:hover {
    background: var(--border);
}

.conversation-item:last-child {
    border-bottom: none;
}

.conversation-info {
    flex: 1;
}

.conversation-name {
    font-weight: 600;
}

.conversation-preview {
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Chat */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px);
}

.chat-header {
    padding: 15px;
    background: var(--card);
    border-radius: 12px;
    margin-bottom: 10px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

.message {
    margin-bottom: 10px;
    display: flex;
}

.message.sent {
    justify-content: flex-end;
}

.message-bubble {
    max-width: 70%;
    padding: 10px 15px;
    border-radius: 18px;
    font-size: 14px;
}

.message.received .message-bubble {
    background: var(--card);
}

.message.sent .message-bubble {
    background: var(--primary);
}

.message-time {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 3px;
}

.chat-input {
    display: flex;
    gap: 10px;
    padding: 10px 0;
}

.chat-input input {
    flex: 1;
    padding: 12px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text);
}

/* Login page */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: var(--card);
    border-radius: 12px;
    text-align: center;
}

.login-container h1 {
    margin-bottom: 10px;
}

.login-container p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    background: rgba(255,255,255,0.04);
    color: var(--text-muted);
    font-weight: 500;
    cursor: pointer;
}

.tab.active {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(124, 58, 237, 0.4));
    color: var(--text);
    border-color: rgba(124,58,237,0.4);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    background: rgba(255,255,255,0.04);
    border-radius: 16px;
    border: 1px dashed rgba(255,255,255,0.1);
}

/* Loading */
.loading {
    color: var(--text-muted);
    text-align: center;
    padding: 40px 0;
}

/* Error */
.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

/* Success */
.success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
    padding: 10px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

/* File input */
.file-input-wrapper {
    position: relative;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-input-label {
    display: block;
    padding: 40px;
    border: 2px dashed var(--border);
    border-radius: 12px;
    text-align: center;
    color: var(--text-muted);
    transition: all 0.2s;
}

.file-input-label:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.image-preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    margin-top: 10px;
}

/* User search/select */
.user-select-container {
    position: relative;
}

.user-search-input {
    width: 100%;
    padding: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 16px;
}

.user-search-input:focus {
    outline: none;
    border-color: var(--primary);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

.user-dropdown.show {
    display: block;
}

.user-option {
    padding: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.user-option:last-child {
    border-bottom: none;
}

.user-option:hover {
    background: var(--border);
}

.user-option .avatar {
    width: 32px;
    height: 32px;
    font-size: 14px;
}

.user-option-info {
    flex: 1;
}

.user-option-name {
    font-weight: 600;
    font-size: 14px;
}

.user-option-stats {
    font-size: 12px;
    color: var(--text-muted);
}

.selected-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--border);
    border-radius: 8px;
    margin-top: 10px;
}

.selected-user .remove-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 18px;
}

.no-results {
    padding: 12px;
    color: var(--text-muted);
    text-align: center;
    font-size: 14px;
}

/* reaction active state */
.btn.active-reaction {
    background: linear-gradient(180deg, #ffe6ea, #ffccd5);
    border-color: #ff7a95;
}

.btn.active-reaction:hover {
    filter: brightness(0.98);
}

/* Responsive */
@media (max-width: 768px) {
    html, body {
        overflow-x: hidden;
        overflow-y: auto;
        height: auto;
        min-height: 100vh;
    }

    .container {
        padding: 10px;
        overflow-x: hidden;
    }

    .header {
        padding: 10px 15px;
    }

    .header-content {
        flex-wrap: wrap;
        gap: 10px;
    }

    .logo {
        font-size: 20px;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: space-around;
        padding-top: 10px;
        border-top: 1px solid var(--border);
        margin-top: 5px;
    }

    .nav-links a {
        font-size: 13px;
        padding: 5px;
    }

    .user-info {
        flex-wrap: wrap;
        justify-content: center;
    }

    /* Cards */
    .card {
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .card-header {
        padding: 12px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .card-author {
        gap: 8px;
    }

    .avatar {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }

    .author-name {
        font-size: 14px;
    }

    .author-stats {
        font-size: 11px;
    }

    .card-body {
        padding: 12px;
    }

    .card-title {
        font-size: 16px;
    }

    .card-meta {
        font-size: 12px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .vote-section {
        padding: 8px 12px;
    }

    .vote-btn {
        font-size: 18px;
        padding: 4px 8px;
    }

    /* Profile */
    .profile-header {
        padding: 25px 15px;
    }

    .profile-avatar {
        width: 80px;
        height: 80px;
        font-size: 32px;
    }

    .profile-name {
        font-size: 20px;
    }

    .profile-stats {
        gap: 15px;
        flex-wrap: wrap;
    }

    .stat-value {
        font-size: 20px;
    }

    .stat-label {
        font-size: 11px;
    }

    /* Tabs */
    .tabs {
        flex-wrap: wrap;
    }

    .tab {
        flex: 1;
        text-align: center;
        padding: 8px 12px;
        font-size: 13px;
    }

    /* Forms */
    .form-group label {
        font-size: 13px;
    }

    .form-group input,
    .form-group textarea {
        padding: 10px;
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    /* Login */
    .login-container {
        margin: 50px 15px;
        padding: 25px 20px;
    }

    .login-container h1 {
        font-size: 22px;
    }

    /* Chat */
    .chat-container {
        height: calc(100vh - 140px);
    }

    .chat-header {
        padding: 12px;
    }

    .message-bubble {
        max-width: 85%;
        padding: 8px 12px;
        font-size: 14px;
    }

    .chat-input {
        gap: 8px;
    }

    .chat-input input {
        padding: 10px;
        font-size: 16px;
    }

    /* Conversations */
    .conversation-item {
        padding: 12px;
        gap: 10px;
    }

    /* Comments */
    .comments-section {
        padding: 12px;
    }

    .comment-form {
        flex-direction: column;
        gap: 8px;
    }

    .comment-form input {
        font-size: 16px;
    }

    .comment-form button {
        width: 100%;
    }

    /* File upload */
    .file-input-label {
        padding: 25px 15px;
        font-size: 14px;
    }

    .image-preview {
        max-height: 200px;
    }
}

@media (max-width: 380px) {
    .nav-links {
        gap: 5px;
    }

    .nav-links a {
        font-size: 12px;
    }

    .profile-stats {
        gap: 10px;
    }

    .stat {
        min-width: 60px;
    }
}