:root {
    --green: #245c43;
    --green-dark: #173d2d;
    --green-light: #e4efdf;
    --cream: #f8f7ef;
    --white: #ffffff;
    --text: #20372b;
    --muted: #718075;
    --border: #e3e8df;
    --accent: #d8e8a8;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    background: var(--cream);
    color: var(--text);
    line-height: 1.6;
}

button,
select {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 7%;
    gap: 24px;
    background: #f8f7efe6;
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid transparent;
}

.logo {
    font-family: 'Manrope', sans-serif;
    font-size: 23px;
    font-weight: 800;
    white-space: nowrap;
}

.logo span {
    color: #6b9664;
}

.navbar nav {
    display: flex;
    gap: 30px;
}

.navbar nav a {
    color: #647267;
    font-size: 14px;
    transition: color 0.2s;
}

.navbar nav a:hover {
    color: var(--green);
}

.nav-button,
.secondary-button {
    border: 1px solid #cbd7c9;
    border-radius: 10px;
    padding: 12px 19px;
    background: transparent;
    color: var(--green);
    font-weight: 700;
    font-size: 13px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    transition: 0.25s;
}

.nav-button:hover,
.secondary-button:hover {
    background: var(--green-light);
}

.hero {
    padding: 75px 7% 100px;
    display: grid;
    grid-template-columns: 1fr 0.9fr;
    gap: 50px;
    align-items: center;
    overflow: hidden;
}

.hero-content {
    max-width: 580px;
}

.badge,
.eyebrow {
    color: #63815e;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.7px;
}

.badge {
    display: inline-block;
    padding: 9px 13px;
    border-radius: 50px;
    background: #e8eddd;
    margin-bottom: 24px;
    letter-spacing: 0.7px;
}

.hero h1,
.section-heading h2,
.planner-intro h2,
.challenge-content h2,
.progress-section h2 {
    font-family: 'Manrope', sans-serif;
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.12;
}

.hero h1 {
    font-size: clamp(48px, 6vw, 78px);
}

.hero h1 span {
    color: #628b59;
}

.hero-content > p {
    margin-top: 23px;
    max-width: 470px;
    color: var(--muted);
    font-size: 16px;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 29px;
}

.primary-button {
    background: var(--green);
    color: white;
    border: 1px solid var(--green);
    border-radius: 10px;
    padding: 14px 20px;
    font-weight: 700;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: 0.25s;
}

.primary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.primary-button:hover:not(:disabled) {
    background: var(--green-dark);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 45px;
    margin-top: 45px;
}

.hero-stats div {
    display: flex;
    flex-direction: column;
}

.hero-stats strong {
    font-family: 'Manrope', sans-serif;
    font-size: 27px;
}

.hero-stats span {
    font-size: 12px;
    color: var(--muted);
}

.hero-visual {
    min-height: 400px;
    height: 440px;
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    background: linear-gradient(
        180deg,
        #c7e1ce 0%,
        #e9e9c8 68%,
        #a9c18f 100%
    );
}

.sun {
    position: absolute;
    width: 90px;
    height: 90px;
    top: 55px;
    right: 75px;
    border-radius: 50%;
    background: #f7e9a9;
    box-shadow: 0 0 70px #f7e9a966;
}

.mountain {
    position: absolute;
    bottom: 0;
    width: 0;
    height: 0;
    border-left: 250px solid transparent;
    border-right: 250px solid transparent;
}

.mountain-back {
    right: -45px;
    border-bottom: 265px solid #789c79;
}

.mountain-front {
    left: -70px;
    border-bottom: 220px solid #416e52;
}

.hero-card {
    position: absolute;
    left: 22px;
    right: 22px;
    bottom: 22px;
    z-index: 2;
    padding: 20px;
    border: 1px solid #ffffff80;
    border-radius: 17px;
    background: #ffffffdb;
    backdrop-filter: blur(15px);
}

.hero-card span {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1.3px;
    color: #648461;
}

.hero-card h3 {
    margin: 8px 0 3px;
    font-family: 'Manrope', sans-serif;
    font-size: 21px;
}

.hero-card p {
    font-size: 13px;
    color: var(--muted);
}

.section {
    padding: 75px 7%;
}

.section-heading {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 25px;
    margin-bottom: 35px;
}

.section-heading h2,
.progress-section h2 {
    font-size: clamp(28px, 4vw, 39px);
    margin-top: 10px;
}

.section-heading > p,
.progress-section > div > p {
    color: var(--muted);
    font-size: 14px;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.activity-card {
    padding: 25px 21px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 18px;
    transition: 0.25s;
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px #2948320c;
    border-color: #bdcfb7;
}

.activity-icon {
    display: grid;
    place-items: center;
    width: 55px;
    height: 55px;
    border-radius: 15px;
    background: var(--green-light);
    font-size: 27px;
    margin-bottom: 23px;
}

.activity-time {
    font-size: 10px;
    letter-spacing: 1.1px;
    font-weight: 800;
    color: #78916e;
}

.activity-card h3 {
    margin-top: 7px;
    font-family: 'Manrope', sans-serif;
    font-size: 18px;
}

.activity-card p {
    min-height: 65px;
    margin-top: 8px;
    color: var(--muted);
    font-size: 13px;
}

.activity-button {
    border: none;
    background: transparent;
    color: var(--green);
    font-size: 12px;
    font-weight: 800;
    margin-top: 17px;
    text-align: left;
    padding: 4px 0;
    transition: transform 0.2s, color 0.2s;
}

.activity-button:hover {
    color: var(--green-dark);
    transform: translateX(3px);
}

.challenge-section {
    margin: 20px 7%;
    padding: 48px;
    border-radius: 25px;
    background: #e7eddd;
    display: grid;
    grid-template-columns: 1fr 0.7fr;
    align-items: center;
    gap: 45px;
}

.challenge-content h2 {
    font-size: clamp(32px, 4vw, 46px);
    margin: 15px 0;
}

.challenge-content > p {
    max-width: 450px;
    color: #697b6c;
    font-size: 14px;
}

.challenge-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    margin: 22px 0;
    color: #47664b;
    font-size: 12px;
    font-weight: 700;
}

.timer-card {
    padding: 28px;
    border-radius: 20px;
    background: white;
    text-align: center;
    box-shadow: 0 15px 40px #243b2710;
}

.timer-label {
    font-size: 10px;
    letter-spacing: 1.5px;
    font-weight: 800;
    color: var(--muted);
}

.timer-circle {
    width: 165px;
    height: 165px;
    border-radius: 50%;
    --progress: 0;
    background: conic-gradient(var(--green) calc(var(--progress) * 1%), #e4eedb 0);
    display: grid;
    place-items: center;
    margin: 23px auto;
    position: relative;
}

.timer-circle::before {
    content: "";
    position: absolute;
    inset: 8px;
    background: white;
    border-radius: 50%;
}

.timer-circle span {
    position: relative;
    font-variant-numeric: tabular-nums;
    font-family: 'Manrope', sans-serif;
    font-size: 37px;
    font-weight: 800;
}

#timerStatus {
    color: var(--muted);
    font-size: 12px;
}

.timer-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 15px;
}

.timer-buttons button {
    border: 1px solid var(--border);
    background: var(--cream);
    color: var(--green);
    border-radius: 8px;
    padding: 8px 17px;
    font-weight: 700;
    font-size: 12px;
    transition: 0.2s;
}

.timer-buttons button:hover:not(:disabled) {
    background: var(--green-light);
}

.timer-buttons button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.planner-section {
    display: grid;
    grid-template-columns: 0.8fr 1fr;
    align-items: center;
    gap: 70px;
}

.planner-intro h2 {
    font-size: clamp(32px, 4vw, 47px);
    margin: 18px 0;
}

.planner-intro > p {
    max-width: 410px;
    color: var(--muted);
    font-size: 15px;
}

.privacy-note {
    margin-top: 25px;
    color: #527450;
    font-size: 12px;
    font-weight: 600;
}

.planner-card {
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: white;
    box-shadow: 0 15px 45px #243b2709;
}

.planner-card label {
    display: block;
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 9px;
    margin-top: 18px;
}

.planner-card label:first-child {
    margin-top: 0;
}

.planner-card select {
    width: 100%;
    padding: 13px;
    background: #fbfcf8;
    border: 1px solid var(--border);
    border-radius: 9px;
    outline: none;
    color: var(--text);
}

.planner-card select:focus {
    border-color: #8aa980;
}

.generate-button {
    width: 100%;
    margin-top: 22px;
}

.ai-result {
    padding: 19px;
    margin-top: 20px;
    border-radius: 12px;
    background: #edf3e8;
    border: 1px solid #e1ebd8;
}

.ai-result > span {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 1px;
    color: #5c7e50;
}

.ai-result h3 {
    font-family: 'Manrope', sans-serif;
    font-size: 18px;
    margin: 10px 0;
}

.ai-result p,
.ai-result li {
    font-size: 13px;
    color: #617261;
}

.ai-result ul {
    padding-left: 20px;
    margin-top: 10px;
}

.plan-tip {
    margin-top: 12px;
    font-weight: 600;
    color: var(--green);
}

.plan-source {
    margin-top: 12px;
    font-size: 11px !important;
    color: #8a998d !important;
}

.ai-result li + li {
    margin-top: 6px;
}

.loading-text {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid #c9dbc0;
    border-top-color: var(--green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.ai-result .error-message {
    color: #9a3b32;
}

.progress-section {
    margin: 15px 7% 90px;
    padding: 35px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
    flex-wrap: wrap;
}

.progress-number {
    font-family: 'Manrope', sans-serif;
    font-size: 37px;
    font-weight: 800;
    color: var(--green);
}

.progress-card {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
    max-width: 450px;
}

.progress-info {
    flex: 1;
}

.progress-info h3 {
    font-size: 14px;
}

.progress-info p {
    margin: 4px 0 10px;
    font-size: 12px;
    color: var(--muted);
}

.progress-track {
    width: 100%;
    height: 7px;
    background: #e8eee4;
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    width: 0;
    height: 100%;
    background: #709766;
    border-radius: 10px;
    transition: width 0.4s;
}

footer {
    padding: 40px 7%;
    background: #e9eee4;
    text-align: center;
}

footer .logo {
    display: inline-block;
    margin-bottom: 10px;
}

footer p {
    color: #647367;
    font-size: 13px;
}

footer > span {
    display: inline-block;
    margin-top: 18px;
    color: #829084;
    font-size: 11px;
}

@media (max-width: 1000px) {
    .activity-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hero {
        gap: 30px;
    }

    .planner-section {
        gap: 35px;
    }

    .challenge-section {
        padding: 30px;
    }

    .navbar nav {
        gap: 15px;
    }
}

@media (max-width: 700px) {
    .navbar {
        flex-wrap: wrap;
        padding: 14px 5%;
        gap: 10px 16px;
    }

    .navbar nav {
        order: 3;
        width: 100%;
        justify-content: space-between;
    }

    .nav-button {
        padding: 9px 12px;
    }

    .hero {
        grid-template-columns: 1fr;
        padding: 50px 5% 65px;
    }

    .hero-visual {
        min-height: 350px;
        height: 350px;
    }

    .hero-stats {
        gap: 25px;
    }

    .section {
        padding: 55px 5%;
    }

    .section-heading {
        align-items: start;
        flex-direction: column;
    }

    .activity-grid {
        gap: 12px;
    }

    .activity-card {
        padding: 19px 15px;
    }

    .activity-card p {
        min-height: 85px;
    }

    .challenge-section {
        margin: 10px 5%;
        padding: 25px 18px;
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .planner-section {
        grid-template-columns: 1fr;
    }

    .planner-card {
        padding: 22px;
    }

    .progress-section {
        margin: 10px 5% 60px;
        padding: 25px 20px;
    }

    .progress-card {
        width: 100%;
    }

    .progress-section > .secondary-button {
        width: 100%;
    }
}

@media (max-width: 400px) {
    .navbar nav a {
        font-size: 11px;
    }

    .nav-button {
        font-size: 11px;
    }

    .hero h1 {
        font-size: 46px;
    }

    .activity-grid {
        grid-template-columns: 1fr;
    }

    .activity-card p {
        min-height: auto;
    }

    .hero-buttons a {
        width: 100%;
    }

    .timer-card {
        padding: 20px;
    }
}

/* ---------- Accessibility & polish ---------- */
.skip-link {
    position: absolute;
    left: 12px;
    top: -60px;
    z-index: 100;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--green);
    color: white;
    font-weight: 700;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 12px;
}

a:focus-visible,
button:focus-visible,
select:focus-visible {
    outline: 3px solid #8aa980;
    outline-offset: 3px;
}

.planner-card select:focus-visible {
    outline-offset: 0;
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 26px;
    z-index: 200;
    max-width: calc(100% - 32px);
    padding: 13px 20px;
    border-radius: 12px;
    background: var(--green-dark);
    color: white;
    font-size: 13px;
    font-weight: 600;
    text-align: center;
    box-shadow: 0 12px 30px #173d2d40;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 20px);
    transition: opacity 0.3s, transform 0.3s;
}

.toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}