/* ===========================
   DAVID PENYA — styles.css
   =========================== */

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

/* Variables */
:root {
    --color-bg: #0F172A;
    --color-white: #FFFFFF;
    --color-gray: #E5E7EB;
    --color-gray-dark: #94A3B8;
    --color-green: #10B981;
    --color-green-hover: #059669;
    --color-red: #EF4444;
    --color-amber: #F59E0B;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1200px;
    --nav-height: 72px;
}

/* Base */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    font-size: 17px;
    line-height: 1.7;
    color: var(--color-white);
    background-color: var(--color-bg);
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================
   NAV
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    height: var(--nav-height);
}

.nav__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-white);
}

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

.nav__links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-dark);
    transition: color 0.2s;
}

.nav__links a:hover {
    color: var(--color-white);
}

.nav__cta {
    background: var(--color-green);
    color: var(--color-white) !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600 !important;
    transition: background 0.2s !important;
}

.nav__cta:hover {
    background: var(--color-green-hover) !important;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
    display: inline-block;
    font-family: var(--font);
    font-size: 16px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn--large {
    font-size: 18px;
    padding: 18px 44px;
}

/* ===========================
   SECTIONS
   =========================== */
.section {
    padding: 100px 0;
}

.section--light {
    background: var(--color-white);
    color: #1E293B;
}

.section--dark {
    background: var(--color-bg);
    color: var(--color-white);
}

.section--cta {
    background: var(--color-bg);
    padding: 120px 0;
}

.section__title {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 40px;
    text-align: center;
    line-height: 1.2;
}

.section__title--left {
    text-align: left;
}

.section__lead {
    font-size: 19px;
    text-align: center;
    color: #64748B;
    margin-bottom: 56px;
    line-height: 1.6;
}

/* ===========================
   HERO
   =========================== */
.hero {
    background: var(--color-bg);
    padding-top: calc(var(--nav-height) + 100px);
    padding-bottom: 100px;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero__title {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 28px;
    color: var(--color-white);
}

.hero__subtitle {
    font-size: 20px;
    line-height: 1.7;
    color: var(--color-gray-dark);
    margin-bottom: 44px;
}

/* ===========================
   PROBLEMA
   =========================== */
.problema__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 900px;
    margin: 0 auto;
}

.problema__intro {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #1E293B;
}

.problema__list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.problema__list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 16px;
    line-height: 1.5;
    color: #475569;
}

.problema__list li svg {
    flex-shrink: 0;
    margin-top: 2px;
}

/* ===========================
   SOLUCIÓN
   =========================== */
.solucion__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.solucion__content p {
    font-size: 18px;
    color: var(--color-gray-dark);
    margin-bottom: 16px;
}

.solucion__bold {
    font-size: 22px !important;
    font-weight: 600;
    color: var(--color-white) !important;
    margin-bottom: 8px !important;
}

.solucion__list {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 32px 0;
}

.solucion__list li {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-green);
    position: relative;
    padding-left: 16px;
}

.solucion__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-green);
    border-radius: 50%;
}

.solucion__close {
    font-size: 20px !important;
    font-weight: 500;
    color: var(--color-white) !important;
    margin-top: 32px !important;
}

/* ===========================
   DIFERENCIAL
   =========================== */
.diferencial__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 56px;
}

.diferencial__card {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.diferencial__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.diferencial__icon {
    margin-bottom: 24px;
}

.diferencial__card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #0F172A;
}

.diferencial__card p {
    font-size: 16px;
    color: #64748B;
    line-height: 1.6;
}

.diferencial__close {
    text-align: center;
    font-size: 19px;
    font-weight: 500;
    color: #475569;
    line-height: 1.7;
}

/* ===========================
   EXPERIENCIA
   =========================== */
.experiencia__content {
    max-width: 750px;
    margin: 0 auto;
}

.experiencia__content > p {
    font-size: 18px;
    color: var(--color-gray-dark);
    margin-bottom: 32px;
    text-align: center;
}

.experiencia__list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.experiencia__list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 17px;
    color: var(--color-gray);
    line-height: 1.5;
}

.experiencia__list li svg {
    flex-shrink: 0;
    margin-top: 3px;
}

.experiencia__close {
    text-align: center;
    font-size: 20px;
    font-weight: 500;
    color: var(--color-white);
    margin-top: 40px;
}

/* ===========================
   SERVICIOS
   =========================== */
.servicios__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.servicios__card {
    background: var(--color-white);
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    padding: 40px 32px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.servicios__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.servicios__number {
    font-size: 48px;
    font-weight: 700;
    color: #E2E8F0;
    margin-bottom: 16px;
    line-height: 1;
}

.servicios__card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #0F172A;
    margin-bottom: 12px;
}

.servicios__card p {
    font-size: 16px;
    color: #64748B;
    line-height: 1.6;
}

/* ===========================
   SOBRE MÍ
   =========================== */
.sobre__grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 64px;
    align-items: center;
}

.sobre__image img {
    border-radius: 16px;
    width: 100%;
    height: auto;
    object-fit: cover;
    aspect-ratio: 1;
}

.sobre__content p {
    font-size: 18px;
    color: var(--color-gray-dark);
    margin-bottom: 12px;
}

.sobre__content p:first-of-type {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-white);
}

.sobre__list {
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sobre__list li {
    font-size: 17px;
    font-weight: 500;
    color: var(--color-green);
    padding-left: 20px;
    position: relative;
}

.sobre__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-green);
    border-radius: 50%;
}

.sobre__content p:last-child {
    color: var(--color-white);
    font-weight: 500;
    margin-top: 20px;
}

/* ===========================
   CTA FINAL
   =========================== */
.cta__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta__text {
    font-size: 24px;
    line-height: 1.5;
    color: var(--color-gray-dark);
    margin-bottom: 40px;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background: var(--color-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 32px 0;
    text-align: center;
}

.footer p {
    font-size: 14px;
    color: var(--color-gray-dark);
}

/* ===========================
   SCROLL REVEAL
   =========================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 1024px) {
    .hero__title {
        font-size: 40px;
    }

    .diferencial__grid,
    .servicios__grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }

    .sobre__grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .sobre__image {
        max-width: 300px;
        margin: 0 auto;
    }

    .section__title--left {
        text-align: center;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 16px;
    }

    .nav__links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .nav__links--open {
        display: flex;
    }

    .nav__toggle {
        display: flex;
    }

    .hero {
        padding-top: calc(var(--nav-height) + 60px);
        padding-bottom: 60px;
        min-height: auto;
    }

    .hero__title {
        font-size: 30px;
    }

    .hero__subtitle {
        font-size: 17px;
    }

    .section {
        padding: 64px 0;
    }

    .section__title {
        font-size: 28px;
        margin-bottom: 28px;
    }

    .problema__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .solucion__list {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .cta__text {
        font-size: 20px;
    }

    .btn--large {
        font-size: 16px;
        padding: 16px 36px;
    }
}