@import url('https://fonts.googleapis.com/css2?family=SN+Pro:ital,wght@0,200..900;1,200..900&display=swap');

/* =====================
   Reset and Base
   ===================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

section {
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

[hidden] {
    display: none !important;
}

/* =====================
   Design Tokens — Light (default)
   ===================== */
:root {
    /* Brand */
    --primary-color:   #2563eb;
    --secondary-color: #1e40af;
    --accent-color:    #3b82f6;

    /* Layout */
    --sidebar-width:   250px;
    --header-height:   60px;
    --transition-speed: 0.3s;

    /* Surfaces */
    --bg-base:         #f3f4f6;
    --bg-section-alt:  rgba(255, 255, 255, 0.06);

    /* Text */
    --text-color:      #1f2937;
    --text-light:      #6b7280;
    --text-inverse:    #ffffff;
    --text-offset:     #afc5ec;

    /* Glass system */
    --glass-tint:      rgba(37, 99, 235, 0.22);
    --glass-tint-hover:rgba(37, 99, 235, 0.36);
    --glass-bg:        rgba(255, 255, 255, 0.12);
    --glass-bg-hover:  rgba(255, 255, 255, 0.22);
    --glass-border:    rgba(255, 255, 255, 0.65);
    --glass-shadow:    0 8px 32px rgba(0, 0, 0, 0.10), inset 0 1px 0 rgba(255, 255, 255, 0.6);

    /* Inputs */
    --input-bg:        rgba(255, 255, 255, 0.55);
    --input-bg-focus:  rgba(255, 255, 255, 0.75);
    --input-border:    rgba(0, 0, 0, 0.12);

    /* Animated gradient blobs */
    --blob-size-1:          520px;
    --blob-size-2:          400px;
    --blob-size-3:          460px;
    --blob-size-4:          380px;
    --blob-opacity:         0.40;
    --blob-blur:            80px;
    --blob-anim-duration:   28s;

    /* Misc */
    --badge-bg:        #fef3c7;
    --badge-text:      #92400e;
    --divider-color:   #e5e7eb;
    --heading-color:   var(--primary-color);

    /* Collab badge */
    --collab-badge-bg:   #d1fae5;
    --collab-badge-text: #065f46;

    /* Auth banners */
    --banner-warn-bg:     #fef3c7;
    --banner-warn-text:   #92400e;
    --banner-warn-border: #fcd34d;
    --banner-error-bg:    #fee2e2;
    --banner-error-text:  #991b1b;
    --banner-error-border:#fca5a5;
    --banner-info-bg:     #dbeafe;
    --banner-info-text:   #1e40af;
    --banner-info-border: #93c5fd;

    /* Form feedback */
    --feedback-success-bg:     #d1fae5;
    --feedback-success-text:   #065f46;
    --feedback-success-border: #6ee7b7;
    --feedback-error-bg:       #fee2e2;
    --feedback-error-text:     #991b1b;
    --feedback-error-border:   #fca5a5;

    /* Toggle */
    --toggle-off-bg: #d1d5db;

    /* Hero text */
    --hero-gradient:      linear-gradient(135deg, #0ea5e9 0%, #6366f1 50%, #06b6d4 100%);
    --hero-subtitle-color: #38bdf8;
    --hero-subtitle-glow:  rgba(6, 182, 212, 0.35);
}

/* =====================
   Dark Mode Token Overrides
   ===================== */
[data-theme="dark"] {
    --bg-base:          #000435;
    --bg-section-alt:   rgba(9, 7, 43, 0.25);

    --text-color:       #f1f5f9;
    --text-light:       #94a3b8;

    --glass-bg:         rgba(15, 23, 42, 0.15);
    --glass-bg-hover:   rgba(15, 23, 42, 0.28);
    --glass-border:     rgba(255, 255, 255, 0.09);
    --glass-shadow:     0 8px 32px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.07);

    --input-bg:         rgba(15, 23, 42, 0.55);
    --input-bg-focus:   rgba(15, 23, 42, 0.75);
    --input-border:     rgba(255, 255, 255, 0.12);

    --badge-bg:         #78350f;
    --badge-text:       #fde68a;
    --divider-color:    rgba(255, 255, 255, 0.1);
    --heading-color:    var(--accent-color);

    --collab-badge-bg:   #064e3b;
    --collab-badge-text: #6ee7b7;

    --blob-opacity:     0.30;

    --banner-warn-bg:     #451a03;
    --banner-warn-text:   #fcd34d;
    --banner-warn-border: #78350f;

    /* Hero text */
    --hero-gradient:       linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #67e8f9 100%);
    --hero-subtitle-color: #7dd3fc;
    --hero-subtitle-glow:  rgba(125, 211, 252, 0.35);
}

/* =====================
   Color Palettes
   ===================== */
[data-palette="green"] {
    --primary-color:    #16a34a;
    --secondary-color:  #15803d;
    --accent-color:     #22c55e;
    --glass-tint:       rgba(22, 163, 74, 0.22);
    --glass-tint-hover: rgba(22, 163, 74, 0.36);
    --hero-gradient:       linear-gradient(135deg, #4ade80 0%, #16a34a 50%, #86efac 100%);
    --hero-subtitle-color: #bbf7d0;
    --hero-subtitle-glow:  rgba(34, 197, 94, 0.35);
}

[data-palette="purple"] {
    --primary-color:    #7c3aed;
    --secondary-color:  #6d28d9;
    --accent-color:     #8b5cf6;
    --glass-tint:       rgba(124, 58, 237, 0.22);
    --glass-tint-hover: rgba(124, 58, 237, 0.36);
    --hero-gradient:       linear-gradient(135deg, #a78bfa 0%, #7c3aed 50%, #c4b5fd 100%);
    --hero-subtitle-color: #e9d5ff;
    --hero-subtitle-glow:  rgba(139, 92, 246, 0.35);
}

[data-palette="teal"] {
    --primary-color:    #0d9488;
    --secondary-color:  #0f766e;
    --accent-color:     #14b8a6;
    --glass-tint:       rgba(13, 148, 136, 0.22);
    --glass-tint-hover: rgba(13, 148, 136, 0.36);
    --hero-gradient:       linear-gradient(135deg, #2dd4bf 0%, #0d9488 50%, #99f6e4 100%);
    --hero-subtitle-color: #99f6e4;
    --hero-subtitle-glow:  rgba(20, 184, 166, 0.35);
}

[data-palette="rose"] {
    --primary-color:    #e11d48;
    --secondary-color:  #be123c;
    --accent-color:     #fb7185;
    --glass-tint:       rgba(225, 29, 72, 0.22);
    --glass-tint-hover: rgba(225, 29, 72, 0.36);
    --hero-gradient:       linear-gradient(135deg, #fb7185 0%, #e11d48 50%, #fda4af 100%);
    --hero-subtitle-color: #fecdd3;
    --hero-subtitle-glow:  rgba(251, 113, 133, 0.35);
}

[data-palette="orange"] {
    --primary-color:    #ea580c;
    --secondary-color:  #c2410c;
    --accent-color:     #fb923c;
    --glass-tint:       rgba(234, 88, 12, 0.22);
    --glass-tint-hover: rgba(234, 88, 12, 0.36);
    --hero-gradient:       linear-gradient(135deg, #fb923c 0%, #ea580c 50%, #fed7aa 100%);
    --hero-subtitle-color: #fed7aa;
    --hero-subtitle-glow:  rgba(251, 146, 60, 0.35);
}

[data-palette="indigo"] {
    --primary-color:    #4338ca;
    --secondary-color:  #3730a3;
    --accent-color:     #6366f1;
    --glass-tint:       rgba(67, 56, 202, 0.22);
    --glass-tint-hover: rgba(67, 56, 202, 0.36);
    --hero-gradient:       linear-gradient(135deg, #818cf8 0%, #4338ca 50%, #a5b4fc 100%);
    --hero-subtitle-color: #c7d2fe;
    --hero-subtitle-glow:  rgba(99, 102, 241, 0.35);
}

/* =====================
   Body
   ===================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: transparent;
    overflow-x: hidden;
}

/* =====================
   Animated Gradient Background
   ===================== */
#bg-gradient {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
    /* --bg-base provides a solid fallback so the page is never transparent to the OS desktop */
    background: var(--bg-base);
}

#bg-gradient span {
    position: absolute;
    border-radius: 50%;
    opacity: var(--blob-opacity);
    filter: blur(var(--blob-blur));
    will-change: transform;
}

/* Blob 1 — primary colour, top-left */
#bg-gradient span:nth-child(1) {
    width: var(--blob-size-1);
    height: var(--blob-size-1);
    background: var(--primary-color);
    top: -10%;
    left: -8%;
    animation: blobFloat1 var(--blob-anim-duration) ease-in-out infinite alternate;
}

/* Blob 2 — accent colour, bottom-right */
#bg-gradient span:nth-child(2) {
    width: var(--blob-size-2);
    height: var(--blob-size-2);
    background: var(--accent-color);
    bottom: -12%;
    right: -6%;
    animation: blobFloat2 calc(var(--blob-anim-duration) * 1.2) ease-in-out infinite alternate;
}

/* Blob 3 — secondary colour, centre */
#bg-gradient span:nth-child(3) {
    width: var(--blob-size-3);
    height: var(--blob-size-3);
    background: var(--secondary-color);
    top: 40%;
    left: 35%;
    animation: blobFloat3 calc(var(--blob-anim-duration) * 0.9) ease-in-out infinite alternate;
}

/* Blob 4 — glass tint, top-right accent */
#bg-gradient span:nth-child(4) {
    width: var(--blob-size-4);
    height: var(--blob-size-4);
    background: var(--glass-tint);
    top: 5%;
    right: 10%;
    animation: blobFloat1 calc(var(--blob-anim-duration) * 1.4) ease-in-out infinite alternate-reverse;
}

@keyframes blobFloat1 {
    0%   { transform: translate(0, 0) scale(1); }
    33%  { transform: translate(6%, 8%) scale(1.04); }
    66%  { transform: translate(-4%, 12%) scale(0.97); }
    100% { transform: translate(8%, -6%) scale(1.06); }
}

@keyframes blobFloat2 {
    0%   { transform: translate(0, 0) scale(1); }
    33%  { transform: translate(-8%, -5%) scale(1.05); }
    66%  { transform: translate(5%, -10%) scale(0.96); }
    100% { transform: translate(-10%, 7%) scale(1.03); }
}

@keyframes blobFloat3 {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(-7%, 6%) scale(1.07); }
    100% { transform: translate(9%, -8%) scale(0.95); }
}

/* =====================
   Sticky Header
   ===================== */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-height);
    background: var(--glass-tint);
    backdrop-filter: blur(20px) saturate(200%);
    -webkit-backdrop-filter: blur(20px) saturate(200%);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    padding: 0 1.25rem;
    gap: 1rem;
    z-index: 1100;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
}

/* Hamburger */
.menu-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    flex-shrink: 0;
    border-radius: 0.375rem;
    transition: background var(--transition-speed);
}

.menu-btn:hover { background: rgba(255, 255, 255, 0.15); }

.menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: transform var(--transition-speed), opacity var(--transition-speed);
}

.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Brand */
.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-inverse);
    text-decoration: none;
    flex: 1;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.brand-name:hover { opacity: 0.9; }

/* Login button */
.btn-login {
    background: rgba(255, 255, 255, 0.18);
    color: var(--text-inverse);
    border-radius: 0.375rem;
    padding: 0.5rem 0.7rem !important;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    border: 1px solid rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: background var(--transition-speed), box-shadow var(--transition-speed);
    flex-shrink: 0;
}

.btn-login:hover {
    background: rgba(255, 255, 255, 0.30);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

/* Header auth area */
.header-auth-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.header-user-email {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Page title */
.page-title {
    flex: 1;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-inverse);
    margin: 0;
}

/* =====================
   Sidebar
   ===================== */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    height: calc(100vh - var(--header-height));
    width: var(--sidebar-width);
    background: var(--glass-tint);
    backdrop-filter: blur(20px) saturate(200%);
    -webkit-backdrop-filter: blur(20px) saturate(200%);
    color: var(--text-inverse);
    transition: transform var(--transition-speed) ease;
    z-index: 1000;
    overflow-x: hidden;
    overflow-y: auto;
    border-right: 1px solid var(--glass-border);
    box-shadow: 2px 0 16px rgba(0, 0, 0, 0.12);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

.nav-links {
    list-style: none;
    padding: 1rem 0;
}

.nav-links li { margin: 0.25rem 0; }

.nav-links a {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: var(--text-inverse);
    text-decoration: none;
    transition: background var(--transition-speed), padding-left var(--transition-speed);
    white-space: nowrap;
    font-size: 0.975rem;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.12);
    padding-left: 2rem;
}

.nav-links a.active {
    background: rgba(255, 255, 255, 0.2);
    border-left: 4px solid white;
}

/* =====================
   Desktop layout
   ===================== */
@media (min-width: 769px) {
    .main-content {
        margin-left: var(--sidebar-width);
        transition: margin-left var(--transition-speed);
    }

    body.sidebar-collapsed .sidebar {
        transform: translateX(calc(-1 * var(--sidebar-width)));
    }

    body.sidebar-collapsed .main-content {
        margin-left: 0;
    }
}

/* =====================
   Mobile layout
   ===================== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(calc(-1 * var(--sidebar-width)));
        box-shadow: none;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: 4px 0 16px rgba(0, 0, 0, 0.25);
    }

    .main-content { margin-left: 0; }

    .hero h1         { font-size: 2.5rem; }
    .hero-subtitle   { font-size: 1.25rem; }
    .section h2      { font-size: 2rem; }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .main-content .btn {
        width: 100%;
        max-width: 300px;
    }

    .btn-login {
        padding: 0.3rem 0.7rem !important;
        font-size: 0.78rem;
    }

    .header-user-email { max-width: 120px; }
}

@media (max-width: 480px) {
    .hero    { padding: 4rem 1rem; }
    .hero h1 { font-size: 2rem; }
    .section { padding: 3rem 1rem; }

    .account-body  { padding: 1.25rem 1rem; }
    .account-card  { padding: 1.25rem; }
    .account-card .content { max-width: 100%; }
}

/* =====================
   Main Content
   ===================== */
.main-content {
    min-height: 100vh;
    padding-top: var(--header-height);
    transition: margin-left var(--transition-speed);
}

.collab-no-sidebar { margin-left: 0; }

/* =====================
   Hero
   ===================== */
.hero {
    background-image: url('./assets/background-image.png');
    background-repeat: no-repeat;
    background-size: cover;
    background-blend-mode: multiply;
    background-color: rgba(150, 150, 150, .9);
    color: var(--text-inverse);
    padding: 6rem 2rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border-radius: 1.25rem;
    padding: 3rem 2.5rem;
}

.hero h1 {
    font-family: 'SN Pro', Georgia, serif;
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    letter-spacing: 0.02em;
    background: var(--hero-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: 'SN Pro', Georgia, serif;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 400;
    font-style: italic;
    color: var(--hero-subtitle-color);
    letter-spacing: 0.04em;
    text-shadow: 0 0 24px var(--hero-subtitle-glow);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    background: var(--secondary-color);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
}

/* =====================
   Sections
   ===================== */
.section {
    padding: 5rem 2rem;
    background: transparent;
}

.bg-light { background: var(--bg-section-alt); }

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    text-align: center;
}

.section p { color: var(--text-color); }

.section-intro {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* =====================
   Shared glass panel base
   ===================== */
.feature-card,
.tool-card,
.account-card,
.contact-form,
.collab-card {
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
}

/* =====================
   Feature Cards
   ===================== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--glass-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    text-align: center;
    color: var(--text-color);
    transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: var(--glass-bg-hover);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--heading-color);
}

/* =====================
   Tool Cards
   ===================== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.tool-card {
    background: var(--glass-bg);
    padding: 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--glass-border);
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--glass-shadow);
    color: var(--text-color);
    transition: all 0.3s ease;
}

.tool-card[href] {
    display: block;
    text-decoration: none;
    color: inherit;
}

.tool-card:hover {
    transform: translateX(5px);
    background: var(--glass-bg-hover);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.tool-card.coming-soon { cursor: default; }
.tool-card.coming-soon:hover { transform: none; }

.tool-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--heading-color);
}

.tool-badge,
.tool-launch-btn {
    display: inline-block;
    margin-top: 1.25rem;
    padding: 0.4rem 1.1rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
}

.tool-badge {
    background: var(--badge-bg);
    color: var(--badge-text);
}

.tool-launch-btn {
    background: var(--primary-color);
    color: #fff;
    text-decoration: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.tool-launch-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.roadmap-list {
    max-width: 50rem;
    margin-left: auto;
    margin-right: 5rem;
    margin-top: 0.5rem;
    margin-bottom: 2rem;
    color: var(--text-light);
    line-height: 1.75;
    list-style-type: none;
}

/* =====================
   Research Stats
   ===================== */
.research-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    text-align: center;
}

.stat h3 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* =====================
   Footer
   ===================== */
.footer {
    background: #1f2937;
    color: white;
    text-align: center;
    padding: 2rem;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

.footer a { color: white; }

/* =====================
   Account Page
   ===================== */
.account-page .main-content { background: transparent; }

.account-body {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.account-img {
    scale: 1.5;
    offset: 0rem 1rem;
}

/* Auth banners */
.auth-banner {
    display: none;
    position: relative;
    padding: 0.875rem 2.5rem 0.875rem 1.25rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.auth-banner:not([hidden]) { display: block; }

.auth-banner-warning {
    background: var(--banner-warn-bg);
    color: var(--banner-warn-text);
    border: 1px solid var(--banner-warn-border);
}

.auth-banner-error {
    background: var(--banner-error-bg);
    color: var(--banner-error-text);
    border: 1px solid var(--banner-error-border);
}

.auth-banner-info {
    background: var(--banner-info-bg);
    color: var(--banner-info-text);
    border: 1px solid var(--banner-info-border);
}

.banner-close {
    position: absolute;
    top: 50%;
    right: 0.75rem;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    opacity: 0.6;
    padding: 0.25rem;
    border-radius: 0.25rem;
    transition: opacity 0.2s;
    color: inherit;
}

.banner-close:hover { opacity: 1; }

/* Account section */
.account-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Account card */
.account-card {
    background: var(--glass-bg);
    border-radius: 0.75rem;
    padding: 2rem;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    color: var(--text-color);
}

.account-card h2 {
    font-size: 1.5rem;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.account-card p { color: var(--text-color); }

.account-card-intro {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.975rem;
}

.user-email-display {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.account-divider {
    border: none;
    border-top: 1px solid var(--divider-color);
    margin: 0;
}

/* Account form inputs */
.account-card .content {
    display: flex;
    flex-direction: column;
    max-width: 420px;
}

.account-card .content label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.35rem;
    margin-left: 0.25rem;
}

.account-card .content input[type="text"],
.account-card .content input[type="email"],
.account-card .content input[type="password"] {
    margin-bottom: 1.1rem;
    padding: 0.6rem 1rem;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-speed), background var(--transition-speed);
}

.account-card .content input[type="text"]:focus,
.account-card .content input[type="email"]:focus,
.account-card .content input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--input-bg-focus);
}

.account-card .content input[type="submit"] {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-speed), box-shadow var(--transition-speed);
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.account-card .content input[type="submit"]:hover:not(:disabled) {
    background: var(--secondary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.account-card .content input[type="submit"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-logout {
    background: transparent;
    color: #dc2626;
    border: 2px solid #dc2626;
    padding: 0.65rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-speed), color var(--transition-speed);
    margin-top: 0.25rem;
    text-align: center;
}

.btn-logout:hover:not(:disabled) {
    background: #dc2626;
    color: white;
}

.btn-logout:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* =====================
   Theme Toggle
   ===================== */
.theme-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 0.375rem;
    font-size: 1.1rem;
    flex-shrink: 0;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-speed);
}

.theme-btn:hover { background: rgba(255, 255, 255, 0.15); }

.theme-icon-dark { display: none; }

[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark  { display: inline; }

/* =====================
   Palette Swatches
   ===================== */
.palette-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.palette-swatch {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
    flex-shrink: 0;
}

.palette-swatch:hover { transform: scale(1.15); }

.palette-swatch.active {
    border-color: var(--text-color);
    box-shadow: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--primary-color);
}

.palette-swatch[data-palette="blue"]   { background: #2563eb; }
.palette-swatch[data-palette="green"]  { background: #16a34a; }
.palette-swatch[data-palette="purple"] { background: #7c3aed; }
.palette-swatch[data-palette="teal"]   { background: #0d9488; }
.palette-swatch[data-palette="rose"]   { background: #e11d48; }
.palette-swatch[data-palette="orange"] { background: #ea580c; }
.palette-swatch[data-palette="indigo"] { background: #4338ca; }

.custom-color-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.custom-color-wrap label {
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
}

#customColorPicker {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    border: 3px solid transparent;
    padding: 0;
    cursor: pointer;
    background: none;
    transition: transform 0.2s, border-color 0.2s;
}

#customColorPicker:hover { transform: scale(1.15); }

#customColorPicker.active {
    border-color: var(--text-color);
    box-shadow: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--primary-color);
}

/* =====================
   Settings Card
   ===================== */
.settings-group-label {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-light);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0;
    color: var(--text-color);
}

/* Toggle switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 2.5rem;
    height: 1.375rem;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--toggle-off-bg);
    border-radius: 1rem;
    cursor: pointer;
    transition: background var(--transition-speed);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    left: 3px;
    top: 3px;
    width: 1rem;
    height: 1rem;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition-speed);
}

.toggle-switch input:checked + .toggle-slider { background: var(--primary-color); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(1.125rem); }

.toggle-switch input:focus + .toggle-slider {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* =====================
   Collaboration Cards
   ===================== */
.collab-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.collab-card {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: background var(--transition-speed), box-shadow var(--transition-speed);
}

.collab-card:hover {
    background: var(--glass-bg-hover);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.collab-avatar {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.collab-info { flex: 1; }

.collab-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-color);
    margin: 0;
}

.collab-role {
    font-size: 0.8rem;
    color: var(--text-light);
    margin: 0;
}

.collab-badge {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: 9999px;
    background: var(--collab-badge-bg);
    color: var(--collab-badge-text);
    flex-shrink: 0;
}

.btn-collab-invite {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1rem;
    background: transparent;
    border: 2px dashed var(--primary-color);
    color: var(--primary-color);
    padding: 0.55rem 1.1rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-speed), color var(--transition-speed);
    font-family: inherit;
}

.btn-collab-invite:hover {
    background: var(--primary-color);
    color: white;
}