/* style.css for FocusNest website */
:root {
    --primary-blue: #0078d7;
    --primary-blue-dark: #005ea3;
    --light-blue: #e9eef6;
    --dark-text: #222;
    --light-text: #fff;
    --light-bg: #f7fafd;
    --gray-border: #eee;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --border-radius-lg: 12px;
    --border-radius-md: 8px;
    --border-radius-sm: 5px;
}
body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
a {
    text-decoration: none;
    color: var(--primary-blue);
}
a:hover {
    text-decoration: underline;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 25px;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 0;
    border-bottom: 1px solid var(--gray-border);
    background-color: var(--light-bg);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.logo-group {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Audiowide', cursive;
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-blue);
}
.logo-icon {
    font-size: 30px;
    line-height: 1;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 30px;
    align-items: center;
}
nav a {
    color: var(--dark-text);
    font-weight: 500;
    padding: 8px 0;
    transition: color 0.3s ease, border-bottom 0.3s ease;
}
nav a:hover {
    color: var(--primary-blue);
    text-decoration: none;
    border-bottom: 2px solid var(--primary-blue);
}
.btn {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--light-text);
    padding: 14px 30px;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    display: inline-block;
    text-align: center;
    border: none;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 120, 215, 0.3);
}
.btn:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 120, 215, 0.4);
    text-decoration: none;
}
.hero-section {
    background-image: url('FocusNest.png');
    background-size: 100%;
    background-repeat: no-repeat;
    background-position: center;
    color: var(--light-text);
    text-align: center;
    padding: 120px 25px;
    position: relative;
    min-height: 450px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: var(--border-radius-lg);
    margin: 25px auto;
    max-width: calc(100% - 50px);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--border-radius-lg);
}
.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}
.hero-section h1 {
    font-family: 'Audiowide', cursive;
    font-size: 3.8em;
    margin-bottom: 25px;
    line-height: 1.2;
    font-weight: 700;
    text-shadow: 2px 2px 6px rgba(0,0,0,0.6);
}
.hero-section p {
    font-size: 1.2em;
    margin-bottom: 40px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}
.section {
    padding: 80px 0;
    text-align: center;
}
.section-title {
    font-family: 'Audiowide', cursive;
    font-size: 3em;
    margin-bottom: 25px;
    color: var(--primary-blue);
    font-weight: 600;
}
.section-subtitle {
    font-size: 1.2em;
    max-width: 900px;
    margin: 0 auto 50px auto;
    color: #555;
}
.problem-solution {
    background-color: var(--light-blue);
    border-radius: var(--border-radius-lg);
    margin: 25px auto;
    max-width: calc(100% - 50px);
    box-shadow: var(--shadow);
    padding: 70px 0;
}
.problem-solution p {
    max-width: 750px;
    margin: 0 auto 20px auto;
    font-size: 1.1em;
    color: #444;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}
.feature-card {
    background-color: var(--light-text);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    padding: 35px;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-height: 200px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}
.feature-card .icon {
    font-size: 3.5em;
    color: var(--primary-blue);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background-color: var(--light-blue);
    border-radius: var(--border-radius-md);
}
.feature-card .icon svg {
    width: 45px;
    height: 45px;
}
.feature-card h3 {
    margin: 0;
    font-size: 1.4em;
    color: var(--dark-text);
    font-weight: 700;
}
.feature-card p {
    font-size: 1em;
    color: #666;
}
.privacy-section {
    padding: 70px 0;
}
.privacy-section .section-title {
    margin-bottom: 25px;
}
.privacy-section p {
    max-width: 850px;
    margin: 0 auto 30px auto;
    font-size: 1.1em;
    color: #444;
}
.final-cta-section {
    background-color: var(--light-blue);
    padding: 90px 25px;
    text-align: center;
    border-radius: var(--border-radius-lg);
    margin: 25px auto;
    max-width: calc(100% - 50px);
    box-shadow: var(--shadow);
}
.final-cta-section .section-title {
    color: var(--primary-blue);
    margin-bottom: 45px;
}
footer {
    text-align: center;
    padding: 40px 25px;
    font-size: 0.95em;
    color: #666;
    border-top: 1px solid var(--gray-border);
    margin-top: 25px;
}
footer nav ul {
    list-style: none;
    padding: 0;
    margin: 0 0 20px 0;
    display: flex;
    justify-content: center;
    gap: 25px;
}
footer a {
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}
footer a:hover {
    color: var(--primary-blue);
}
.footer-copyright {
    color: #aaa;
    font-size: 0.98em;
}
#backToTopBtn {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    background-color: var(--primary-blue);
    color: var(--light-text);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: background-color 0.3s, transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}
#backToTopBtn:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-2px);
}
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}
@media (max-width: 900px) {
    .hero-section h1 {
        font-size: 3em;
    }
    .section-title {
        font-size: 2.5em;
    }
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}
@media (max-width: 768px) {
    .logo-group {
        font-size: 22px;
    }
    .logo-icon {
        font-size: 26px;
    }
    nav ul {
        gap: 20px;
    }
    nav a {
        font-size: 0.95em;
    }
    .hero-section {
        padding: 100px 20px;
        min-height: 400px;
    }
    .hero-section h1 {
        font-size: 2.8em;
    }
    .hero-section p {
        font-size: 1.1em;
    }
    .section-title {
        font-size: 2.2em;
    }
    .section-subtitle {
        font-size: 1.05em;
    }
    .feature-card {
        padding: 30px;
    }
    .feature-card .icon {
        font-size: 3em;
        width: 60px;
        height: 60px;
    }
    .feature-card .icon svg {
        width: 40px;
        height: 40px;
    }
    .feature-card h3 {
        font-size: 1.3em;
    }
    .final-cta-section {
        padding: 70px 20px;
    }
    .final-cta-section .section-title {
        font-size: 2.2em;
    }
    #backToTopBtn {
        width: 45px;
        height: 45px;
        font-size: 22px;
        bottom: 20px;
        right: 20px;
    }
}
@media (max-width: 600px) {
    header {
        flex-direction: column;
        gap: 15px;
        padding: 15px 0;
    }
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    nav a {
        padding: 5px 10px;
    }
    .hero-section {
        padding: 80px 15px;
        min-height: 350px;
        max-width: calc(100% - 30px);
    }
    .hero-section h1 {
        font-size: 2.2em;
    }
    .hero-section p {
        font-size: 1em;
    }
    .section {
        padding: 50px 0;
    }
    .section-title {
        font-size: 1.9em;
    }
    .section-subtitle {
        font-size: 0.95em;
    }
    .problem-solution, .final-cta-section {
        max-width: calc(100% - 30px);
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .feature-card {
        padding: 25px;
    }
    .feature-card .icon {
        width: 50px;
        height: 50px;
    }
    .feature-card .icon svg {
        width: 35px;
        height: 35px;
    }
    .feature-card h3 {
        font-size: 1.2em;
    }
    .final-cta-section .section-title {
        font-size: 1.9em;
    }
    footer nav ul {
        flex-direction: column;
        gap: 10px;
    }
    
}