:root {
    /* Colors - Primary Palette */
    --color-primary-start: #667eea;
    --color-primary-end: #764ba2;
    --color-bg-dark-1: #0f0f0f;
    --color-bg-dark-2: #1a1a1a;
    --color-bg-dark-3: #252525;
    --color-text-primary: #ffffff;
    --color-text-muted: #8a8a8a;
    --color-text-secondary: #b0b0b0;

    /* Surfaces (Dark theme cards/backgrounds) */
    --bg-primary: rgba(255, 255, 255, 0.06);      /* Card surface */
    --bg-secondary: rgba(255, 255, 255, 0.03);    /* Subtle surface */
    --border-color: rgba(255, 255, 255, 0.12);    /* Card borders */

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-primary-hover: linear-gradient(135deg, #7c8ff0 0%, #8a5bb8 100%);
    --gradient-bg: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 35%, #252525 70%, #1a1a1a 100%);

    /* Spacing Scale (Mobile-First) */
    --space-xs: 0.5rem;    /* 8px */
    --space-sm: 0.75rem;   /* 12px */
    --space-md: 1rem;      /* 16px */
    --space-lg: 1.5rem;    /* 24px */
    --space-xl: 2rem;      /* 32px */
    --space-2xl: 3rem;     /* 48px */
    --space-3xl: 4rem;     /* 64px */

    /* Typography Scale (Mobile-First) */
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    --font-size-3xl: 2rem;       /* 32px - mobile heading */
    --font-size-4xl: 2.5rem;     /* 40px */
    --font-size-5xl: 3.5rem;     /* 56px - desktop heading */

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --font-weight-black: 800;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(102, 126, 234, 0.1);
    --shadow-md: 0 4px 16px rgba(102, 126, 234, 0.3);
    --shadow-lg: 0 6px 20px rgba(102, 126, 234, 0.4);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
}

/* Editable title affordance */
.editable-title {
    cursor: pointer;
    position: relative;
}
.editable-title:hover,
.editable-title:focus {
    text-decoration: underline dotted rgba(255,255,255,0.25);
    text-underline-offset: 3px;
}
.editable-title::after {
    content: '\270E'; /* pencil */
    position: relative;
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.0;
    transition: opacity var(--transition-fast);
}
.editable-title:hover::after,
.editable-title:focus-visible::after {
    opacity: 0.5;
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px; /* Base font size */
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
        Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--gradient-bg);
    color: var(--color-text-primary);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: var(--font-size-3xl); /* Mobile: 32px */
    font-weight: var(--font-weight-black);
}

h2 {
    font-size: var(--font-size-2xl); /* Mobile: 24px */
}

h3 {
    font-size: var(--font-size-xl); /* Mobile: 20px */
}

p {
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

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

a:hover {
    color: var(--color-primary-end);
}

/* Desktop Typography Scaling */
@media (min-width: 768px) {
    h1 {
        font-size: var(--font-size-4xl); /* Desktop: 40px */
    }

    h2 {
        font-size: var(--font-size-3xl); /* Desktop: 32px */
    }
}

/* ============================================
   LAYOUT CONTAINERS
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-md); /* Mobile: 16px padding */
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xl); /* Desktop: 32px padding */
    }
}

.page-wrapper {
    min-height: 100vh;
    padding-top: 80px; /* Account for fixed header */
    padding-bottom: var(--space-xl);
}

/* ============================================
   HEADER COMPONENT
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--space-md) var(--space-md);
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-content {
    max-width: var(--container-xl);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo img {
    height: 32px; /* Mobile: smaller logo */
    width: auto;
}

/* Mobile menu toggle button */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-fast);
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile navigation */
@media (max-width: 767px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: rgba(15, 15, 15, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: stretch;
        padding: 80px var(--space-lg) var(--space-lg);
        gap: var(--space-xs);
        transition: right var(--transition-base);
        border-left: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .nav.active {
        right: 0;
    }

    .nav a {
        display: block;
        padding: var(--space-md);
        font-size: var(--font-size-base);
        border-radius: var(--radius-md);
        text-align: left;
    }

    /* Overlay for mobile menu */
    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(2px);
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-base);
    }

    .menu-overlay.active {
        opacity: 1;
        pointer-events: all;
    }
}

/* Desktop: hide menu toggle */
@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }

    .header {
        padding: var(--space-lg) var(--space-xl);
    }

    .header-logo img {
        height: 40px; /* Desktop: larger logo */
    }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg); /* Mobile: smaller padding */
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--gradient-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    color: var(--color-text-primary);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #e53935 0%, #c62828 100%);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
}

@media (min-width: 768px) {
    .btn {
        padding: var(--space-md) var(--space-xl); /* Desktop: larger padding */
    }
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-lg); /* Mobile: less padding */
    margin-bottom: var(--space-lg);
    transition: var(--transition-base);
}

.card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .card {
        padding: var(--space-xl); /* Desktop: more padding */
    }
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary-start);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

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

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

/* ============================================
   BACKGROUND PATTERN
   ============================================ */
.background-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.05;
    background-image:
        radial-gradient(circle at 25% 25%, #667eea 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, #764ba2 1px, transparent 1px);
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    z-index: -1;
    pointer-events: none;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in {
    animation: fadeIn 0.4s ease-out;
}

/* ============================================
   LOADING STATES
   ============================================ */
.loading {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-primary-start);
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   RESPONSIVE GRID
   ============================================ */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-cols-1 {
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   ALERT/MESSAGE COMPONENTS
   ============================================ */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-sm);
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.3);
    color: #4caf50;
}

.alert-error {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid rgba(244, 67, 54, 0.3);
    color: #f44336;
}

.alert-info {
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.3);
    color: #667eea;
}

/* ============================================
   NAVIGATION COMPONENTS
   ============================================ */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav a:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-black);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .nav {
        gap: var(--space-lg);
    }

    .nav a {
        font-size: var(--font-size-base);
        padding: var(--space-sm) var(--space-md);
    }
}

/* ============================================
   ITEM BLOCKS (Roadmaps, Subjects, Topics, Sections, Resources)
   ============================================ */
.item-block {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    transition: all var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    min-height: 80px;
}

.item-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.item-block:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.item-block:hover::before {
    opacity: 1;
}

.item-block.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.item-block.drag-over {
    border-color: var(--color-primary-start);
    background: rgba(102, 126, 234, 0.1);
}

/* Item Block Inner Wrapper (for multi-section items like resources) */
.item-block > div:first-child:last-child {
    width: 100%;
}

/* Item Block Header */
.item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    width: 100%;
}

.item-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0;
    flex: 1;
    line-height: 1.4;
}

.item-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 var(--space-sm);
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

/* Item Block Content */
.item-content {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: var(--space-sm);
}

/* Item Block Footer */
.item-footer {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.item-meta {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Item Actions */
.item-actions {
    display: flex;
    gap: var(--space-sm);
    margin-left: auto;
}

.item-action-btn {
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    cursor: pointer;
    transition: var(--transition-fast);
}

.item-action-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    border-color: var(--color-primary-start);
}

/* Account Page Styles */
.account-card .form-input[readonly] {
    background: transparent;
    border-color: transparent;
    padding-left: 0;
    font-weight: 500;
    cursor: default;
}
    
.account-card .form-input[readonly]:focus {
    box-shadow: none;
}

.account-card .form-label {
    color: var(--color-primary-start);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    margin-bottom: 0.25rem;
}

#verification-badge {
    transition: all var(--transition-base);
    font-weight: 700;
}

#verification-code:focus {
    letter-spacing: 0.5em; /* maintain letter spacing on focus */
}

#send-verification-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

@media (min-width: 768px) {
    .item-block {
        padding: var(--space-xl);
    }

    .item-title {
        font-size: var(--font-size-xl);
    }

    .item-content {
        font-size: var(--font-size-base);
    }
}

/* ============================================
   CONTENT BLOCKS (Inside Cards)
   ============================================ */
.content-block {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    position: relative;
    transition: all var(--transition-base);
    cursor: grab;
}

.content-block::before {
    content: '⋮⋮';
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.15);
    font-size: var(--font-size-xl);
    letter-spacing: -4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.content-block:hover::before {
    opacity: 1;
}

.content-block:hover {
    background: rgba(0, 0, 0, 0.3);
    border-color: rgba(102, 126, 234, 0.3);
}

.content-block.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.content-block-text {
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Markdown content styling */
.markdown-content {
    white-space: normal;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    color: var(--color-text-primary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
    font-weight: var(--font-weight-semibold);
}

.markdown-content h1 { font-size: 2em; }
.markdown-content h2 { font-size: 1.5em; }
.markdown-content h3 { font-size: 1.25em; }

.markdown-content p {
    margin-bottom: var(--space-md);
}

.markdown-content ul,
.markdown-content ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-xl);
}

.markdown-content li {
    margin-bottom: var(--space-xs);
}

.markdown-content code {
    background: rgba(102, 126, 234, 0.2);
    color: var(--color-primary-start);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
}

.markdown-content pre {
    background: rgba(0, 0, 0, 0.3);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--space-md);
}

.markdown-content pre code {
    background: none;
    padding: 0;
    color: var(--color-text-primary);
}

.markdown-content blockquote {
    border-left: 4px solid rgba(102, 126, 234, 0.5);
    padding-left: var(--space-md);
    margin-left: 0;
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
    font-style: italic;
}

.markdown-content a {
    color: var(--color-primary-start);
    text-decoration: underline;
}

.markdown-content a:hover {
    color: var(--color-primary-end);
}

.markdown-content hr {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin: var(--space-lg) 0;
}

.markdown-content table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: var(--space-md);
}

.markdown-content th,
.markdown-content td {
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-sm);
    text-align: left;
}

.markdown-content th {
    background: rgba(102, 126, 234, 0.2);
    font-weight: var(--font-weight-semibold);
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

/* Block metadata badge */
.block-metadata-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(102, 126, 234, 0.15);
    color: var(--color-primary-start);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-md);
}

/* Block actions overlay */
.block-actions-overlay {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    display: flex;
    gap: var(--space-xs);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 10;
}

/* Show actions on hover (desktop) */
.content-block:hover .block-actions-overlay {
    opacity: 1;
    pointer-events: all;
}

/* Show actions when tapped (mobile) */
.content-block.show-actions .block-actions-overlay {
    opacity: 1;
    pointer-events: all;
}

/* Modern action buttons */
.block-action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.block-action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.block-action-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.block-action-btn svg {
    width: 14px;
    height: 14px;
}

.block-edit-btn {
    color: var(--color-primary-start);
}

.block-edit-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: var(--color-primary-start);
}

.block-remove-btn {
    color: #dc3545;
}

.block-remove-btn:hover {
    background: rgba(220, 53, 69, 0.1);
    border-color: #dc3545;
}

@media (min-width: 768px) {
    .content-block {
        padding: var(--space-2xl);
    }

    .content-block-text {
        font-size: var(--font-size-lg);
        line-height: 2;
    }
}

/* ============================================
   DASHBOARD COMPONENTS
   ============================================ */
.dashboard {
    padding-top: 80px;
    padding-bottom: var(--space-2xl);
}

.dashboard-header {
    margin-bottom: var(--space-xl);
}

.dashboard-header h1,
.dashboard-header h2 {
    margin-bottom: var(--space-sm);
}

.roadmaps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

@media (min-width: 640px) {
    .roadmaps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .roadmaps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   TAB COMPONENTS
   ============================================ */
.tabs {
    display: flex;
    gap: var(--space-sm);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab {
    padding: var(--space-md) var(--space-lg);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

.tab:hover {
    color: var(--color-text-secondary);
}

.tab.active {
    color: var(--color-text-primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

@media (min-width: 768px) {
    .tabs {
        gap: var(--space-md);
    }

    .tab {
        font-size: var(--font-size-base);
    }
}

/* ============================================
   MODAL COMPONENTS
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

.modal-content {
    background: rgba(15, 15, 15, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 500px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

@media (min-width: 768px) {
    .modal-content {
        padding: var(--space-2xl);
    }
}

.item-block {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm); /* always slightly elevated */
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast), background var(--transition-fast);
}
.item-block:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(118, 75, 162, 0.6);
}
.item-title {
    line-height: 1.35;
}
.item-block.compact {
    padding: var(--space-md) var(--space-lg);
    min-height: auto;
}

.external-link-icon:hover {
    background: rgba(255,255,255,0.15) !important;
    color: var(--color-primary-start);
}