:root {
    --bg-dark: #07090e;
    --card-bg: rgba(17, 24, 39, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --accent-neon: #d1fe17;
    --accent-hover: #b8e612;
    --accent-glow: rgba(209, 254, 23, 0.2);
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', sans-serif;
    --font-display: 'Outfit', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Subtle background glow effect */
.bg-glow {
    position: fixed;
    top: -20%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
    z-index: -1;
    pointer-events: none;
    opacity: 0.5;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    padding: 0 5%;
    background: rgba(7, 9, 14, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.logo img {
    height: 32px;
    width: auto;
    filter: brightness(0) invert(1); /* makes the black logo white */
}

nav ul {
    list-style: none;
    display: flex;
    gap: 32px;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

nav a:hover, nav a.active {
    color: var(--accent-neon);
}

.badge {
    background: var(--accent-neon);
    color: #000;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 700;
    vertical-align: top;
    margin-left: 4px;
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--card-border);
    transition: var(--transition);
    cursor: pointer;
}

.user-profile img:hover {
    border-color: var(--accent-neon);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Sidebar */
.sidebar-trigger {
    position: fixed;
    top: 80px;
    left: 0;
    width: 30px;
    height: calc(100vh - 80px);
    z-index: 89;
}

.sidebar {
    position: fixed;
    top: 80px;
    left: -260px;
    width: 260px;
    height: calc(100vh - 80px);
    z-index: 90;
    transition: left 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 20px 0;
}

.sidebar-inner {
    height: 100%;
    margin: 0 10px;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: 20px 0 40px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
}

.sidebar-trigger:hover + .sidebar, .sidebar:hover {
    left: 0;
}

.sidebar ul {
    list-style: none;
    padding: 20px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar li {
    position: relative;
}

.sidebar a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar a i {
    font-size: 1.3rem;
}

.sidebar a:hover {
    background: rgba(209, 254, 23, 0.1);
    color: var(--accent-neon);
}

.sidebar .tooltip {
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%) translateX(10px);
    background: #000;
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    border: 1px solid var(--card-border);
    z-index: 100;
}

.sidebar li:hover .tooltip {
    opacity: 1;
    transform: translateY(-50%) translateX(20px);
}

/* Main Content */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 20px 140px;
    transition: padding-left 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

body:has(.sidebar:hover) .container {
    padding-left: 280px;
}

/* Hero */
.hero {
    text-align: center;
    margin-bottom: 70px;
}

.hero-badge {
    display: inline-block;
    background: rgba(209, 254, 23, 0.1);
    color: var(--accent-neon);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 20px;
    border: 1px solid rgba(209, 254, 23, 0.2);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(to right, #fff, #a1a1aa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Grid Layout */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

/* Cards */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(209,254,23,0.3), transparent);
    opacity: 0;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(209, 254, 23, 0.2);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 20px var(--accent-glow);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.card h2 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card h2 i {
    color: var(--accent-neon);
    font-size: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent-neon);
    color: #000;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
}

.btn:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 8px;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.05);
    border-color: var(--text-primary);
    transform: scale(1);
    box-shadow: none;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 6px 12px;
}

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

.btn-icon {
    padding: 12px;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--card-border);
    border-radius: 16px;
    padding: 40px 20px;
    text-align: center;
    background: rgba(0,0,0,0.2);
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent-neon);
    background: rgba(209, 254, 23, 0.05);
}

.upload-icon-wrapper {
    width: 64px;
    height: 64px;
    background: rgba(209, 254, 23, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--accent-neon);
    font-size: 2rem;
}

.upload-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.upload-subtitle {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 20px;
}

.scan-content {
    margin-top: 20px;
    padding: 16px;
    background: rgba(0,0,0,0.3);
    border-radius: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    border: 1px solid var(--card-border);
}

.scan-content strong {
    color: var(--text-primary);
}

.result-header h3 {
    font-size: 1.1rem;
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-neon);
}

/* Calendar & Planner */
.calendar {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 24px;
}

.day {
    flex: 1;
    background: rgba(0,0,0,0.2);
    padding: 16px 8px;
    border-radius: 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
    border: 1px solid transparent;
}

.day:hover {
    background: rgba(255,255,255,0.05);
}

.day.active {
    background: rgba(209, 254, 23, 0.1);
    border-color: var(--accent-neon);
}

.day strong {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
}

.day.active strong {
    color: var(--accent-neon);
}

.day span {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 600;
}

.day .dot {
    width: 6px;
    height: 6px;
    background: var(--accent-neon);
    border-radius: 50%;
    display: block;
}

.planner-summary {
    display: flex;
    gap: 16px;
}

.stat-box {
    flex: 1;
    background: rgba(0,0,0,0.2);
    padding: 16px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    border: 1px solid var(--card-border);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.4rem;
    font-family: var(--font-display);
    font-weight: 600;
}

.stat-value.highlight {
    color: var(--accent-neon);
}

/* Recipes */
.input-wrapper {
    position: relative;
    margin-bottom: 20px;
}

textarea {
    width: 100%;
    height: 140px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    resize: none;
    transition: var(--transition);
}

textarea:focus {
    outline: none;
    border-color: var(--accent-neon);
    background: rgba(0,0,0,0.4);
    box-shadow: 0 0 0 4px rgba(209,254,23,0.1);
}

textarea::placeholder {
    color: var(--text-tertiary);
}

.input-wrapper .btn {
    position: absolute;
    bottom: 16px;
    right: 16px;
    padding: 8px 16px;
    border-radius: 8px;
}

.recipe-content {
    padding: 20px;
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    border: 1px solid var(--card-border);
}

.recipe-content h4 {
    color: var(--accent-neon);
    margin-bottom: 12px;
    font-family: var(--font-display);
}

.recipe-content ul, .recipe-content ol {
    margin-left: 20px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* Hydration Tracker */
.water-stats {
    text-align: center;
    margin-bottom: 24px;
}

.water-text {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
}

.water-current {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.water-total {
    color: var(--text-secondary);
    font-weight: 500;
}

.water-progress-container {
    margin-bottom: 30px;
}

.water-progress-track {
    height: 12px;
    background: rgba(0,0,0,0.3);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.water-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #38bdf8, #818cf8);
    border-radius: 10px;
    transition: width 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.water-progress-fill .glow {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 20px;
    background: rgba(255,255,255,0.4);
    filter: blur(5px);
}

.water-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.water-controls .btn {
    flex: 1;
}

/* Toggle Switch */
.reminder-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    border: 1px solid var(--card-border);
}

.reminder-toggle span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input { display: none; }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255,255,255,0.1);
    transition: .4s;
    border-radius: 24px;
    border: 1px solid var(--card-border);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-tertiary);
    transition: .4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: rgba(209, 254, 23, 0.2);
    border-color: var(--accent-neon);
}

input:checked + .slider:before {
    transform: translateX(20px);
    background-color: var(--accent-neon);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* AI Assistant Floating Bar & Chat */
.ai-assistant-wrapper {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 600px;
    z-index: 99;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-log-container {
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(209, 254, 23, 0.3);
    border-radius: 24px;
    height: 380px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 1;
    transform: translateY(0);
    overflow: hidden;
}

.chat-log-container.hidden {
    opacity: 0;
    transform: translateY(40px);
    pointer-events: none;
    height: 0;
    border: none;
}

.chat-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-family: var(--font-display);
    color: var(--accent-neon);
}

.chat-header span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-header button {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.chat-header button:hover {
    color: #ff3b3b;
}

.chat-log {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-message {
    max-width: 85%;
    display: flex;
}

.chat-message.ai {
    align-self: flex-start;
}

.chat-message.user {
    align-self: flex-end;
}

.msg-content {
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.chat-message.ai .msg-content {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-top-left-radius: 4px;
}

.chat-message.user .msg-content {
    background: var(--accent-neon);
    color: #000;
    border-top-right-radius: 4px;
}

.ai-assistant-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 10px 10px 10px 20px;
    border-radius: 100px;
    border: 1px solid rgba(209, 254, 23, 0.3);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 20px var(--accent-glow);
    transition: var(--transition);
}

.ai-assistant-inner:focus-within {
    border-color: var(--accent-neon);
    transform: translateY(-2px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.6), 0 0 30px rgba(209, 254, 23, 0.3);
}

.ai-icon {
    color: var(--accent-neon);
    font-size: 1.5rem;
}

.ai-assistant input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    font-family: var(--font-sans);
}

.ai-assistant input::placeholder {
    color: var(--text-tertiary);
}

.ai-assistant button {
    background: var(--text-primary);
    color: #000;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.ai-assistant button:hover {
    background: var(--accent-neon);
    transform: scale(1.05);
}

/* Footer */
footer {
    border-top: 1px solid var(--card-border);
    background: rgba(0,0,0,0.3);
    padding: 40px 5%;
    margin-top: 40px;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-content p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.socials {
    display: flex;
    gap: 16px;
}

.socials a {
    color: var(--text-tertiary);
    font-size: 1.5rem;
    transition: var(--transition);
}

.socials a:hover {
    color: var(--accent-neon);
    transform: translateY(-2px);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 100px;
    right: 30px;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 16px 24px;
    border-radius: 12px;
    font-weight: 500;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast i {
    color: var(--accent-neon);
    font-size: 1.2rem;
}

.toast.hidden {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
}

/* Utils */
.hidden { display: none !important; }

/* Animations */
.fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Media Queries */
@media (max-width: 768px) {
    header { padding: 0 20px; }
    nav ul { display: none; }
    body:has(.sidebar:hover) .container { padding-left: 20px; }
    .hero h1 { font-size: 2.5rem; }
    .grid-layout { grid-template-columns: 1fr; }
    .calendar { overflow-x: auto; padding-bottom: 10px; }
    .day { min-width: 60px; }
    .footer-content { flex-direction: column; gap: 20px; text-align: center; }
}