/* Watermarks */
.watermark-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.watermark-text {
    position: fixed;
    font-size: 24px;
    font-weight: bold;
    color: var(--text);
    opacity: 0.025;
    white-space: nowrap;
    transform: rotate(-45deg);
    right: -50px;
}

.watermark-1 { top: 10%; }
.watermark-2 { top: 35%; }
.watermark-3 { top: 60%; }
.watermark-4 { top: 85%; }

/* Base Layout */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
body {
    display: flex;
    flex-direction: column;
}

/* Fixed Header */
.demo-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--panel);
    box-shadow: 0 2px 8px rgba(15,23,36,0.08);
    z-index: 100;
    height: 64px;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(15,23,36,0.04);
}
.nav-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.demo-tabs {
    display: flex;
    gap: 12px;
}
.demo-tab {
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text);
    font-weight: 500;
    transition: all 0.2s ease;
}
.demo-tab.active {
    background: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(74,158,255,0.2);
}
.demo-tab:hover:not(.active) {
    background: rgba(74,158,255,0.1);
}

/* Main Content Area */
.container {
    flex: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 84px 24px 24px;
    overflow-y: auto;
    position: relative;
    height: calc(100vh - 64px);
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
}
.container::-webkit-scrollbar {
    width: 8px;
}
.container::-webkit-scrollbar-track {
    background: transparent;
}
.container::-webkit-scrollbar-thumb {
    background-color: var(--accent);
    border-radius: 4px;
}

/* Content Sections */
.tab-content, .content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}
.tab-content.active, .content-section.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Demo Boxes */
.demo-box {
    background: var(--panel);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 12px rgba(15,23,36,0.06);
    border: 1px solid rgba(15,23,36,0.04);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.demo-box:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(15,23,36,0.08);
}

/* Code Blocks */
.code {
    background: #f8fafc;
    padding: 20px;
    border-radius: 8px;
    font-family: 'Fira Code', monospace;
    margin: 16px 0;
    white-space: pre-wrap;
    border: 1px solid rgba(15,23,36,0.04);
    font-size: 14px;
    line-height: 1.5;
    box-shadow: inset 0 1px 4px rgba(15,23,36,0.04);
}

/* Results and Outputs */
.result {
    color: var(--accent);
    font-weight: 600;
    padding: 8px 12px;
    border-radius: 6px;
    background: rgba(255,213,74,0.1);
    display: inline-block;
    margin: 8px 0;
}

/* Navigation Elements */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    color: var(--muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}
.back-link:hover {
    color: var(--text);
    transform: translateX(-2px);
}

/* Buttons and Interactive Elements */
button {
    background: var(--accent);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    margin: 8px 0;
    font-weight: 500;
    transition: all 0.2s ease;
    color: var(--text);
}
button:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(255,213,74,0.2);
    filter: brightness(1.05);
}

/* Form Elements */
select, input {
    padding: 8px 12px;
    border: 1px solid rgba(15,23,36,0.1);
    border-radius: 6px;
    margin: 4px;
    font-size: 14px;
}
select:focus, input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(255,213,74,0.2);
}

/* Marathi Examples */
.marathi-examples {
    background: linear-gradient(to right bottom, #f8fafc, #f1f5f9);
    padding: 24px;
    border-radius: 12px;
    margin: 20px 0;
    border: 1px solid rgba(15,23,36,0.04);
}
.marathi-examples h3 {
    color: var(--text);
    margin: 20px 0 12px;
    font-size: 1.1em;
    display: flex;
    align-items: center;
    gap: 8px;
}
.marathi-examples h3::before {
    content: "🔹";
    font-size: 1.2em;
}
.marathi-examples p {
    color: var(--muted);
    margin: 8px 0 16px;
    line-height: 1.6;
}

/* Lists */
ul {
    padding-left: 24px;
    margin: 16px 0;
}
li {
    margin: 8px 0;
    line-height: 1.6;
}

/* Typography */
h1 {
    margin: 0 0 16px;
    font-size: 2em;
}
h2 {
    margin: 24px 0 16px;
    font-size: 1.5em;
}
h3 {
    margin: 20px 0 12px;
    font-size: 1.2em;
}
p {
    margin: 0 0 16px;
    line-height: 1.6;
}

/* Watermarks */
.container {
    position: relative;
}

/* Multiple watermarks using pseudo-elements */
.container::before,
.container::after {
    content: "© Yogesh Suryawanshi";
    position: fixed;
    font-size: 48px;
    font-weight: 900;
    pointer-events: none;
    white-space: nowrap;
    z-index: -1;
    letter-spacing: 2px;
    background: linear-gradient(45deg, 
        rgba(255,213,74,0.5), 
        rgba(255,213,74,0.2)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 2px 2px 4px rgba(15,23,36,0.2);
    animation: watermarkPulse 4s ease-in-out infinite;
}

@keyframes watermarkPulse {
    0%, 100% { opacity: 0.15; }
    50% { opacity: 0.25; }
}

/* Watermark styles for both methods */
.container::before,
.container::after,
.demo-box:first-of-type::before,
.demo-box:last-of-type::after,
.watermark-text {
    content: "© Yogesh Suryawanshi";
    position: fixed;
    font-size: 48px;
    font-weight: 900;
    transform: rotate(-45deg) scale(1.2);
    pointer-events: none;
    white-space: nowrap;
    z-index: -1;
    background: linear-gradient(45deg, 
        rgba(74,158,255,0.5), 
        rgba(74,158,255,0.2)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 2px 2px 4px rgba(15,23,36,0.2);
    animation: watermarkPulse 4s ease-in-out infinite;
}

/* Positioning for pseudo-element method */
.container::before {
    top: 25%;
    left: 5%;
    animation-delay: 0s;
}

.container::after {
    top: 55%;
    right: 10%;
    animation-delay: 1s;
}

.demo-box:first-of-type::before {
    bottom: 25%;
    left: 15%;
    animation-delay: 2s;
}

.demo-box:last-of-type::after {
    top: 75%;
    right: 20%;
    animation-delay: 3s;
}

/* Positioning for div method */
.watermark-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    pointer-events: none;
}

.watermark-text {
    position: absolute;
}

.watermark-1 {
    top: 25%;
    left: 5%;
    animation-delay: 0s;
}

.watermark-2 {
    top: 55%;
    right: 10%;
    animation-delay: 1s;
}

.watermark-3 {
    bottom: 25%;
    left: 15%;
    animation-delay: 2s;
}

.watermark-4 {
    top: 75%;
    right: 20%;
    animation-delay: 3s;
}

/* Credit Line */
.credit {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    font-size: 0.9em;
    color: var(--muted);
    border-top: 1px solid rgba(15,23,36,0.04);
    background: var(--panel);
}
.credit-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.credit-name {
    font-weight: 500;
    color: var(--text);
}
.credit-contact {
    font-size: 0.9em;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s ease;
}
.credit-contact:hover {
    color: var(--text);
}

/* Exercise Section */
.exercise-box {
    margin: 24px 0;
    padding: 20px;
    background: rgba(15,23,36,0.02);
    border-radius: 8px;
    border: 1px solid rgba(15,23,36,0.04);
}