/* ============================================
   GRIDCALC — Mantine UI Inspired Design System
   ============================================ */

:root {
    /* Mantine Blue Color Scale */
    --mantine-blue-0: #e7f5ff;
    --mantine-blue-1: #d0ebff;
    --mantine-blue-2: #a5d8ff;
    --mantine-blue-3: #74c0fc;
    --mantine-blue-4: #4dabf7;
    --mantine-blue-5: #339af0;
    --mantine-blue-6: #228be6;
    --mantine-blue-7: #1c7ed6;
    --mantine-blue-8: #1971c2;
    --mantine-blue-9: #1864ab;

    /* Mantine Red (for loss) */
    --mantine-red-5: #ff6b6b;
    --mantine-red-6: #fa5252;
    --mantine-red-7: #f03e3e;

    /* Mantine Teal (for profit/success) */
    --mantine-teal-5: #20c997;
    --mantine-teal-6: #12b886;
    --mantine-teal-7: #0ca678;

    /* Mantine Grape (accent) */
    --mantine-grape-5: #cc5de8;
    --mantine-grape-6: #be4bdb;

    /* Mantine Gray Scale */
    --mantine-gray-0: #f8f9fa;
    --mantine-gray-1: #f1f3f5;
    --mantine-gray-2: #e9ecef;
    --mantine-gray-3: #dee2e6;
    --mantine-gray-4: #ced4da;
    --mantine-gray-5: #adb5bd;
    --mantine-gray-6: #868e96;
    --mantine-gray-7: #495057;
    --mantine-gray-8: #343a40;
    --mantine-gray-9: #212529;

    /* Semantic Tokens (Mantine style) */
    --primary: var(--mantine-blue-6);
    --primary-hover: var(--mantine-blue-7);
    --primary-light: var(--mantine-blue-0);
    --primary-filled: var(--mantine-blue-6);
    --secondary: var(--mantine-grape-6);
    --bg-dark: var(--mantine-gray-0);
    --bg-panel: #ffffff;
    --text-main: var(--mantine-gray-9);
    --text-muted: var(--mantine-gray-6);
    --profit: var(--mantine-teal-6);
    --loss: var(--mantine-red-6);
    --glass-border: var(--mantine-gray-2);
    --glass-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.1);

    /* Mantine Spacing */
    --spacing-xs: 0.625rem;  /* 10px */
    --spacing-sm: 0.75rem;   /* 12px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.25rem;   /* 20px */
    --spacing-xl: 2rem;      /* 32px */

    /* Mantine Radius */
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 32px;

    /* Mantine Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);

    /* Mantine Font */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
    --font-family-headings: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.55;
    display: flex;
    flex-direction: column;
    font-size: 0.875rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background elements — softer Mantine feel */
.bg-shape { position: fixed; border-radius: 50%; filter: blur(120px); z-index: -1; opacity: 0.25; animation: float 12s infinite ease-in-out alternate; }
.shape1 { width: 50vw; height: 50vw; background: var(--mantine-blue-2); top: -20%; left: -10%; }
.shape2 { width: 40vw; height: 40vw; background: var(--mantine-grape-5); bottom: -10%; right: -10%; animation-delay: -5s; opacity: 0.15; }
@keyframes float { 0% { transform: translateY(0) scale(1); } 100% { transform: translateY(20px) scale(1.05); } }

/* ========== HEADER ========== */
.main-header {
    position: sticky; top: 0; z-index: 100;
    border-bottom: 1px solid var(--mantine-gray-2);
    padding: 0 var(--spacing-xl);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    height: 60px;
    display: flex;
    align-items: center;
}
.header-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; width: 100%; }
.logo h1 { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.03em; margin: 0; font-family: var(--font-family-headings); cursor: pointer; }
.logo .highlight { color: var(--primary); }

.main-nav { display: flex; gap: 4px; }
.nav-btn {
    background: transparent;
    color: var(--mantine-gray-7);
    border: 1px solid transparent;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease, color 0.15s ease;
    line-height: 1.55;
}
.nav-btn:hover { color: var(--text-main); background: var(--mantine-gray-0); }
.nav-btn.active {
    color: var(--primary);
    background: var(--mantine-blue-0);
    font-weight: 600;
    border: 1px solid transparent;
}

.auth-section { display: flex; align-items: center; gap: var(--spacing-sm); }
.user-label { font-size: 0.875rem; font-weight: 600; color: var(--primary); }

/* ========== LAYOUT ========== */
.app-container { flex: 1; max-width: 1100px; margin: 0 auto; padding: var(--spacing-xl); width: 100%; }
.view-section { display: none; animation: fadeIn 0.2s ease; }
.view-section.active { display: block; }

.view-header { margin-bottom: var(--spacing-xl); text-align: center; }
.view-header h2 { font-size: 1.625rem; font-weight: 800; margin-bottom: 0.375rem; color: var(--mantine-gray-9); font-family: var(--font-family-headings); }
.view-header p { color: var(--mantine-gray-6); font-size: 0.875rem; line-height: 1.6; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* ========== SHARED UTILITIES ========== */
.glass {
    background: var(--bg-panel);
    border: 1px solid var(--mantine-gray-2);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.card { margin-bottom: var(--spacing-lg); overflow: hidden; transition: box-shadow 0.15s ease; }
.card:hover { box-shadow: var(--shadow-md); }
.card-header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--mantine-gray-2); background: var(--mantine-gray-0); }
.card-header h2 { font-size: 0.9375rem; font-weight: 600; display: flex; align-items: center; gap: 0.5rem; margin: 0; color: var(--mantine-gray-8); }
.hidden { display: none !important; }
.space-between { display: flex; justify-content: space-between; align-items: center; }
.flex-align { display: flex; align-items: center; }

/* ========== SIMULATOR DASHBOARD ========== */
.top-dashboard {
    display: flex; flex-wrap: wrap; gap: var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
    background: var(--bg-panel);
    border: 1px solid var(--mantine-gray-2);
    box-shadow: var(--shadow-sm);
}
.dash-item { display: flex; flex-direction: column; gap: 4px; }
.dash-label { font-size: 0.75rem; color: var(--mantine-gray-6); font-weight: 500; text-transform: uppercase; letter-spacing: 0.03em; }
.dash-value { font-size: 1.5rem; font-weight: 700; color: var(--mantine-gray-9); }
.dash-value small { font-size: 0.875rem; color: var(--mantine-gray-5); margin-left: 2px; }
.dash-item.highlight-box {
    background: var(--mantine-gray-0);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--mantine-gray-2);
}
.current-price-input { display: flex; align-items: center; position: relative; margin: 0.375rem 0; }
.current-price-input input {
    width: 100%; padding: 0.5rem 2.5rem 0.5rem 0.75rem;
    background: #fff; border: 1px solid var(--mantine-gray-3);
    border-radius: var(--radius-sm); color: var(--text-main);
    font-size: 0.875rem; outline: none; transition: border-color 0.15s;
}
.current-price-input input:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(34, 139, 230, 0.15); }
.current-return { display: flex; justify-content: space-between; align-items: baseline; margin-top: 4px; font-weight: 700; }
.return-rate { font-size: 1.125rem; }
.return-amount { font-size: 0.8125rem; }

.text-profit { color: var(--profit); }
.text-loss { color: var(--loss); }
.text-neutral { color: var(--text-muted); }

/* ========== FORMS & TABLES ========== */
.dashboard { display: grid; grid-template-columns: 1fr 1.6fr; gap: var(--spacing-xl); }
.form-layout { padding: var(--spacing-lg); display: flex; flex-direction: column; gap: 1rem; }
.input-group label { display: block; margin-bottom: 4px; font-size: 0.875rem; font-weight: 500; color: var(--mantine-gray-7); }

.input-wrapper { position: relative; display: flex; align-items: center; }

input[type="number"],
input[type="text"],
input[type="password"],
.modal-input,
.blog-input {
    width: 100%;
    padding: 0.5rem 2.5rem 0.5rem 0.75rem;
    background: #fff;
    border: 1px solid var(--mantine-gray-3);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 0.875rem;
    line-height: 1.55;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    font-family: var(--font-family);
}
input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(34, 139, 230, 0.15);
}
input::placeholder { color: var(--mantine-gray-4); }

.unit { position: absolute; right: 0.75rem; color: var(--mantine-gray-5); pointer-events: none; font-size: 0.875rem; }
.qty-preview { margin-top: 4px; font-size: 0.8125rem; color: var(--primary); text-align: right; }
.qty-preview span { font-weight: 600; }
.quick-actions { margin-top: 0.375rem; display: flex; gap: 0.375rem; }

.table-container { overflow-x: auto; padding: 0 1.25rem 1.25rem; }
table { width: 100%; border-collapse: separate; border-spacing: 0; margin-top: 0.75rem; }
th {
    text-align: left; padding: 0.625rem 0.75rem;
    color: var(--mantine-gray-6); font-size: 0.75rem;
    font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em;
    border-bottom: 2px solid var(--mantine-gray-2); white-space: nowrap;
}
td { padding: 0.75rem; border-bottom: 1px solid var(--mantine-gray-1); font-size: 0.875rem; }
tr:hover { background: var(--mantine-gray-0); }
.empty-row td { text-align: center; color: var(--mantine-gray-5); padding: 2rem; font-style: normal; }

.batch-badge {
    display: inline-block;
    background: var(--mantine-gray-1);
    padding: 2px 8px;
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--mantine-gray-7);
}
.first-badge { background: var(--primary); color: white; }
tr.first-batch { background: var(--mantine-blue-0); }
tr.first-batch:hover { background: rgba(34, 139, 230, 0.08); }

.target-price { color: var(--mantine-teal-6); font-weight: 600; }

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.125rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease;
    text-align: center;
    color: white;
    width: 100%;
    line-height: 1;
    height: 42px;
    font-family: var(--font-family);
}
.buy-btn { background: var(--mantine-blue-6); }
.buy-btn:hover { background: var(--mantine-blue-7); }
.sell-btn { background: var(--mantine-red-6); }
.sell-btn:hover { background: var(--mantine-red-7); }

.btn-sm {
    padding: 4px 10px;
    border: 1px solid var(--mantine-gray-3);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--mantine-gray-7);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1.55;
}
.btn-sm:hover { background: var(--mantine-gray-0); border-color: var(--mantine-gray-4); }

.btn-text { background: none; border: none; color: var(--mantine-gray-6); cursor: pointer; font-size: 0.875rem; transition: color 0.15s; }
.btn-text:hover { color: var(--text-main); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all 0.15s;
}
.btn-outline:hover { background: var(--mantine-blue-0); }

.mini-btn { width: auto; padding: 0.5rem 1.5rem; height: 36px; }

/* ========== MODALS ========== */
.modal {
    display: none; position: fixed; z-index: 1000;
    left: 0; top: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    align-items: center; justify-content: center;
}
.modal.show { display: flex; }
.modal-content {
    background: var(--bg-panel);
    border: 1px solid var(--mantine-gray-2);
    border-radius: var(--radius-md);
    width: 90%; max-width: 400px;
    padding: var(--spacing-xl);
    position: relative;
    box-shadow: var(--shadow-xl);
}
.close-btn { position: absolute; top: 0.75rem; right: 0.75rem; font-size: 1.25rem; cursor: pointer; color: var(--mantine-gray-5); background: none; border: none; width: 28px; height: 28px; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; }
.close-btn:hover { background: var(--mantine-gray-0); color: var(--mantine-gray-8); }

/* Login Modal (Mantine Card style) */
.login-box { text-align: center; }
.login-box h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: var(--spacing-xl); color: var(--mantine-gray-9); }
.login-box .btn { margin-top: var(--spacing-md); background: var(--primary); }
.login-box .btn:hover { background: var(--primary-hover); }

/* ========== POST / BLOG FEEDS ========== */
.post-form-container { padding: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.post-textarea {
    width: 100%; background: #fff;
    border: 1px solid var(--mantine-gray-3);
    border-radius: var(--radius-sm);
    padding: 0.625rem 0.75rem;
    color: var(--text-main);
    font-size: 0.875rem;
    resize: vertical; outline: none;
    transition: border-color 0.15s;
    font-family: var(--font-family);
    line-height: 1.55;
}
.post-textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(34, 139, 230, 0.15); }
.post-form-actions { display: flex; justify-content: space-between; align-items: center; margin-top: var(--spacing-md); }
.file-upload-wrapper { display: flex; align-items: center; gap: 0.375rem; }
.file-input { display: none; }
.file-name { font-size: 0.75rem; color: var(--mantine-gray-5); max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.feed-layout { display: grid; grid-template-columns: 300px 1fr; gap: var(--spacing-xl); }
.feed-list { display: flex; flex-direction: column; gap: var(--spacing-md); }
.post-card {
    background: var(--bg-panel);
    border: 1px solid var(--mantine-gray-2);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: box-shadow 0.15s;
}
.post-card:hover { box-shadow: var(--shadow-md); }
.post-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.75rem; }
.post-user { font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; }
.post-avatar {
    width: 32px; height: 32px;
    background: linear-gradient(135deg, var(--mantine-blue-5), var(--mantine-blue-7));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 600; color: white; font-size: 0.8125rem;
}
.post-date { font-size: 0.75rem; color: var(--mantine-gray-5); }
.post-body { margin-bottom: 0.75rem; word-break: break-all; white-space: pre-wrap; font-size: 0.875rem; line-height: 1.6; color: var(--mantine-gray-8); }
.post-img { max-width: 100%; border-radius: var(--radius-sm); margin-top: 0.75rem; border: 1px solid var(--mantine-gray-2); }
.post-footer { border-top: 1px solid var(--mantine-gray-1); padding-top: 0.75rem; display: flex; flex-direction: column; gap: 0.75rem; }
.comment-input-area { display: flex; gap: 0.375rem; }
.comment-input {
    flex: 1; background: #fff;
    border: 1px solid var(--mantine-gray-3);
    border-radius: var(--radius-sm);
    padding: 0.375rem 0.75rem;
    color: var(--text-main); outline: none;
    font-size: 0.8125rem;
    transition: border-color 0.15s;
}
.comment-input:focus { border-color: var(--primary); }
.comments-list { display: flex; flex-direction: column; gap: 4px; margin-top: 0.375rem; }
.comment-item { display: flex; gap: 0.375rem; font-size: 0.8125rem; }
.comment-author { font-weight: 600; color: var(--primary); }
.comment-text { color: var(--mantine-gray-7); }

/* ========== BLOG ========== */
.blog-card {
    border-left: 3px solid var(--primary);
    background: var(--bg-panel);
    border-radius: var(--radius-md);
    border: 1px solid var(--mantine-gray-2);
    border-left: 3px solid var(--primary);
}
.blog-title { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.375rem; color: var(--mantine-gray-9); }

/* ========== SUGGESTION BOX ========== */
.suggestion-box {
    background: rgba(34, 139, 230, 0.04);
    border: 1px dashed var(--mantine-blue-3);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-top: 0.375rem;
}
.suggestion-title { font-size: 0.8125rem; margin-bottom: 0.375rem; font-weight: 600; color: var(--mantine-gray-7); }
.btn-suggestion {
    width: 100%;
    background: var(--mantine-blue-0);
    border: 1px solid var(--mantine-blue-2);
    border-radius: var(--radius-sm);
    padding: 0.625rem;
    color: var(--mantine-blue-8);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.8125rem;
    transition: all 0.15s;
}
.btn-suggestion:hover { background: var(--mantine-blue-1); }

/* ========== HOT POSTS SIDEBAR ========== */
.hot-sidebar { position: sticky; top: 80px; }

/* ========== FOOTER ========== */
.main-footer {
    text-align: center;
    padding: var(--spacing-xl);
    border-top: 1px solid var(--mantine-gray-2);
    color: var(--mantine-gray-5);
    font-size: 0.8125rem;
    margin-top: auto;
    background: var(--bg-panel);
}

/* ========== SCREENSHOT ========== */
.screenshot-target { background: var(--mantine-gray-0); }

/* ========== EDITOR TOOLBAR (Mantine style) ========== */
.editor-toolbar {
    display: flex;
    gap: 4px;
    padding: 6px;
    background: var(--mantine-gray-0);
    border: 1px solid var(--mantine-gray-2);
    border-radius: var(--radius-sm);
    flex-wrap: wrap;
    align-items: center;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
    .dashboard { grid-template-columns: 1fr; }
    .feed-layout { grid-template-columns: 1fr; }
    .main-header { padding: 0.5rem var(--spacing-md); height: auto; }
    .header-inner {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 0.25rem 0;
        justify-content: center;
    }
    .logo { width: 100%; text-align: center; }
    .main-nav { display: flex; justify-content: center; flex-wrap: wrap; order: 1; }
    .auth-section { order: 2; justify-content: center; flex-wrap: wrap; gap: 0.5rem; }
    .app-container { padding: var(--spacing-md); }
    .top-dashboard { padding: var(--spacing-md); gap: var(--spacing-md); }
}

@media (max-width: 600px) {
    .nav-btn { padding: 0.375rem 0.625rem; font-size: 0.8125rem; }
    .view-header h2 { font-size: 1.25rem; }
    .dash-value { font-size: 1.25rem; }
    .auth-section { width: 100%; justify-content: center; }
}