/* ===== CSS Variables ===== */
:root {
    --color-primary: #F5A623;
    --color-primary-dark: #E09000;
    --color-secondary: #5D4037;
    --color-accent: #4CAF50;
    --color-background: #FFFDF7;
    --color-background-alt: #FFF8E1;
    --color-text: #3E2723;
    --color-text-light: #6D4C41;
    --color-white: #FFFFFF;
    --color-border: #E0D5C7;
    
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition: 0.3s ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-secondary);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
}

h4 {
    font-size: 1.125rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn--secondary:hover {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.btn--outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn--large {
    padding: 18px 36px;
    font-size: 1.125rem;
}

/* ===== Header / Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav__logo {
    display: flex;
    align-items: center;
}

.nav__logo-img {
    height: 60px;
    width: auto;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav__link {
    font-weight: 500;
    color: var(--color-text);
    padding: 8px 0;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__link--login {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 10px 24px;
    border-radius: var(--radius-sm);
}

.nav__link--login::after {
    display: none;
}

.nav__link--login:hover {
    background-color: var(--color-primary-dark);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav__toggle-bar {
    width: 100%;
    height: 3px;
    background-color: var(--color-secondary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-alt) 100%);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero__title {
    margin-bottom: 24px;
    color: var(--color-secondary);
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero__cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero__image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__image img {
    max-width: 500px;
    width: 100%;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.15));
}

/* ===== Section Styles ===== */
.section__header {
    text-align: center;
    margin-bottom: 60px;
}

.section__title {
    margin-bottom: 16px;
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Features Section ===== */
.features {
    padding: 100px 0;
    background-color: var(--color-white);
}

.features__group {
    margin-bottom: 60px;
}

.features__group:last-child {
    margin-bottom: 0;
}

.features__group-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-border);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 20px;
}

.badge--free {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.badge--premium {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.features__grid--premium {
    grid-template-columns: repeat(2, 1fr);
    max-width: 800px;
}

.feature-card {
    background-color: var(--color-background);
    padding: 32px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-card--premium {
    background: linear-gradient(135deg, var(--color-background-alt) 0%, #FFF3E0 100%);
    border: 2px solid var(--color-primary);
}

.feature-card__icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card__title {
    margin-bottom: 12px;
    color: var(--color-secondary);
}

.feature-card__desc {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== Plans Section ===== */
.plans {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-background-alt) 0%, var(--color-background) 100%);
}

.plans__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.plan-card {
    position: relative;
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.plan-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.plan-card--popular {
    border: 3px solid var(--color-primary);
    transform: scale(1.05);
}

.plan-card--popular:hover {
    transform: scale(1.05) translateY(-8px);
}

.plan-card__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
}

.plan-card__header {
    text-align: center;
    padding-bottom: 24px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.plan-card__name {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--color-secondary);
}

.plan-card__price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.plan-card__amount {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.plan-card__period {
    font-size: 1rem;
    color: var(--color-text-light);
}

.plan-card__note {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 8px;
}

.plan-card__features {
    flex: 1;
    margin-bottom: 24px;
}

.plan-card__features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.95rem;
    color: var(--color-text);
}

.plan-card__features .check {
    color: var(--color-accent);
    font-weight: 700;
    flex-shrink: 0;
}

.plan-card .btn {
    width: 100%;
}

.plan-card .btn:disabled {
    background-color: #E0E0E0;
    border-color: #E0E0E0;
    color: #9E9E9E;
    cursor: not-allowed;
    opacity: 0.7;
}

.plan-card .btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ===== CTA Section ===== */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-secondary) 0%, #3E2723 100%);
    text-align: center;
}

.cta__title {
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta__subtitle {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.25rem;
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-secondary);
    padding: 60px 0 40px;
}

.footer__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.footer__brand {
    text-align: center;
}

.footer__logo {
    height: 80px;
    margin: 0 auto 12px;
}

.footer__tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.footer__links {
    display: flex;
    gap: 32px;
}

.footer__links a {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
}

.footer__links a:hover {
    color: var(--color-primary);
}

.footer__copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* ===== Responsive Styles ===== */

/* Tablet */
@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero__cta {
        justify-content: center;
    }
    
    .hero__image {
        order: -1;
    }
    
    .hero__image img {
        max-width: 350px;
    }
    
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .plans__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .plan-card--popular {
        transform: scale(1);
    }
    
    .plan-card--popular:hover {
        transform: translateY(-8px);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 32px 20px;
        gap: 24px;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__toggle.active .nav__toggle-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .nav__toggle.active .nav__toggle-bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active .nav__toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero__image img {
        max-width: 280px;
    }
    
    .features__grid,
    .features__grid--premium {
        grid-template-columns: 1fr;
    }
    
    .plans__grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer__links {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero__cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__cta .btn {
        width: 100%;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .plan-card {
        padding: 24px;
    }
}