:root {
    --green: #2f7d4a;
    --dark: #0f1e1a;
    --light: #f8f9f8;
    --gray: #6b7280;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: #fff;
    color: #111;
}

/* ================= NAV ================= */
.navbar {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    background: white;
    padding: 12px 20px;
    border-radius: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.logo {
    width: 28px;
    margin-right: 8px;
}

.brand {
    font-weight: 600;
}

.nav-left {
    display: flex;
    align-items: center;
}

.nav-right {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    color: #111;
    text-decoration: none;
    font-size: 14px;
}

.btn-primary {
    background: var(--green);
    color: white;
    padding: 10px 18px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
}

.btn-primary, .btn-secondary {
    transition: all 0.3s ease;
}

.btn-primary:hover, .btn-secondary:hover {
    transform: scale(1.05); /* Grows slightly */
    filter: contrast(1.2); /* Makes the color pop */
}

/* ================= HERO ================= */
.hero {
    height: 90vh;
    /* This points to your woman-on-sofa image */
    background: url("../assets/reading_book.jpg") center/cover no-repeat;
    position: relative;
    display: flex;
    align-items: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.4);
}

.hero-content {
    position: relative;
    max-width: 600px;
    margin-left: 8%;
    color: white;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
}

.hero-content p {
    margin: 20px 0;
    font-size: 16px;
    max-width: 480px;
}

/* Base state for Image Sections */
.hero, .research {
    transition: background-size 0.5s ease-in-out;
    background-size: 100%; /* Start at normal size */
}

/* Hover state: Slow zoom effect */
.hero:hover, .research:hover {
    background-size: 105%; /* Zooms in 5% */
}
/* ================= PROBLEM ================= */
.problem {
    padding: 100px 8%;
    background-color: #fff;
}

.problem-grid {
    display: grid;
    /* Create 3 equal columns */
    grid-template-columns: repeat(3, 1fr);
    /* Define the layout areas */
    grid-template-areas:
        "card1 card2 text"
        "card3 .     text";
    gap: 30px;
    align-items: start;
}

.problem-card {
    background: #000;
    color: white;
    padding: 40px 30px;
    border-radius: 12px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 15px;
}

/* Assigning each element to its area */
.problem-card:nth-child(1) { grid-area: card1; }
.problem-card:nth-child(2) { grid-area: card2; }
.problem-card:nth-child(3) { grid-area: card3; }
.problem-text {
    grid-area: text;
    padding-left: 40px;
    align-self: center; /* Centers text vertically against the cards */
}

.problem-card i, .problem-card .icon {
    font-size: 24px;
    margin-bottom: 10px;
}

.problem-text h2 {
    font-size: 42px; /* Matching the large bold heading in image */
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: #000;
}

.problem-text p {
    font-size: 18px;
    color: #444;
    line-height: 1.6;
}

/* Base state for all cards */
.problem-card, .solution-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, filter 0.3s ease;
    cursor: pointer;
}

/* Hover state: Lifts the card and adds a glow */
.problem-card:hover, .solution-card:hover {
    transform: translateY(-10px); /* Moves card up */
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2); /* Deepens shadow */
    filter: brightness(1.1); /* Slightly brightens the color */
}

/* ================= SOLUTION ================= */
.solution {
    padding: 80px 8%;
    text-align: center;
}

.section-title {
    color: var(--green);
    letter-spacing: 6px;
    font-size: 16px;
    margin-bottom: 60px;
}

.solution-grid {
    display: grid;
    /* Create a 3x3 grid to allow for diamond placement */
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, auto);
    gap: 20px;
    justify-items: center;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.solution-card {
    width: 240px; /* Slightly wider to match your image */
    height: 180px;
    border-radius: 12px;
    color: white;
    padding: 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    font-size: 15px;
    font-weight: 500;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1); /* Adds the soft shadow from your image */
}

/* Position the cards in the diamond shape */
.solution-card.red {
    grid-column: 2; /* Middle column */
    grid-row: 1;    /* Top row */
}

.solution-card.blue {
    grid-column: 1; /* Left column */
    grid-row: 2;    /* Middle row */
}

.solution-card.orange {
    grid-column: 3; /* Right column */
    grid-row: 2;    /* Middle row */
}

.solution-card.green {
    grid-column: 2; /* Middle column */
    grid-row: 3;    /* Bottom row */
}

/* Color codes from your specific image */
.red { background: #BF4F36; }
.blue { background: #3B82F6; }
.orange { background: #E68A3E; }
.green { background: #3E7D51; }

/* ================= HOW IT WORKS ================= */
.how-it-works {
    padding: 100px 8%;
    position: relative;
    background: #fff;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.step-number {
    font-size: 40px;
    color: #cbd5cb;
    font-weight: 700;
}

.wave {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    height: 120px;
}

.wave path {
    fill: none;
    stroke: var(--green);
    stroke-width: 3;
}

/* ================= RESEARCH ================= */
.research {
    position: relative;
    /* This points to your library bookshelf image */
    background: url("../assets/library.jpg") center/cover no-repeat;
    padding: 120px 8%;
    color: white;
}

.research-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.6);
}

.research-content {
    position: relative;
    max-width: 600px;
}

.btn-secondary {
    display: inline-block;
    margin-top: 20px;
    background: white;
    color: black;
    padding: 10px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 14px;
}

/* ================= FOOTER ================= */
.footer {
    padding: 20px;
    text-align: center;
    background: #f0f0f0;
    font-size: 14px;
    color: #555;
}