/* ============================================================
   DE PAULA — Briefing de Criação de Marca
   Design System & Styles
   ============================================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Palette */
  --clr-bg:           #0d0b1a;
  --clr-surface:      #141225;
  --clr-surface-2:    #1c1934;
  --clr-surface-3:    #252244;
  --clr-border:       rgba(124, 92, 252, .12);
  --clr-border-hover: rgba(124, 92, 252, .3);

  --clr-text:         #e8e6f0;
  --clr-text-muted:   #9896ac;
  --clr-text-dim:     #6e6b85;

  --clr-accent:       #7c5cfc;
  --clr-accent-light: #a78bfa;
  --clr-accent-dark:  #5b3fd4;
  --clr-accent-glow:  rgba(124, 92, 252, .25);

  --clr-success:      #34d399;
  --clr-success-bg:   rgba(52, 211, 153, .08);
  --clr-error:        #f87171;
  --clr-error-bg:     rgba(248, 113, 113, .08);

  --gradient-brand: linear-gradient(135deg, #7c5cfc 0%, #c084fc 50%, #e879f9 100%);
  --gradient-surface: linear-gradient(180deg, var(--clr-surface) 0%, var(--clr-bg) 100%);

  /* Typography */
  --ff-heading: 'Outfit', sans-serif;
  --ff-body:    'Inter', sans-serif;

  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.5rem;
  --fs-2xl:  2rem;
  --fs-3xl:  2.75rem;
  --fs-4xl:  3.5rem;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.5);
  --shadow-glow: 0 0 40px var(--clr-accent-glow);

  /* Transitions */
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --duration: 0.3s;
}


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

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

body {
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  overflow-x: hidden;
  position: relative;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
textarea { resize: vertical; }
input, textarea, select { font: inherit; }


/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--sp-6);
}


/* --- Background Blobs --- */
.bg-blobs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .35;
  animation: blobFloat 20s ease-in-out infinite alternate;
}

.blob--1 {
  width: 500px; height: 500px;
  background: var(--clr-accent);
  top: -10%; left: -8%;
  animation-duration: 22s;
}

.blob--2 {
  width: 400px; height: 400px;
  background: #c084fc;
  bottom: 10%; right: -5%;
  animation-delay: -7s;
  animation-duration: 18s;
}

.blob--3 {
  width: 300px; height: 300px;
  background: #e879f9;
  top: 40%; left: 50%;
  animation-delay: -12s;
  animation-duration: 25s;
}

@keyframes blobFloat {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(30px, -40px) scale(1.05); }
  66%  { transform: translate(-20px, 20px) scale(.95); }
  100% { transform: translate(10px, -10px) scale(1.02); }
}


/* --- Header --- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: var(--sp-4) 0;
  transition: background var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out),
              backdrop-filter var(--duration) var(--ease-out);
}

.header--scrolled {
  background: rgba(13, 11, 26, .78);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  box-shadow: 0 1px 0 var(--clr-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.header__logo-img {
  height: 56px;
  width: auto;
  object-fit: contain;
  background: rgba(255, 255, 255, .95);
  padding: 5px 16px;
  border-radius: var(--radius-sm);
  transition: opacity var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.header__logo:hover .header__logo-img {
  background: #fff;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.header__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: color var(--duration) var(--ease-out);
}

.header__link:hover { color: var(--clr-text); }

.header__link--cta {
  background: var(--gradient-brand);
  color: #fff;
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: opacity var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out);
}

.header__link--cta:hover {
  opacity: .9;
  transform: translateY(-1px);
  color: #fff;
}


/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-24) 0 var(--sp-16);
  overflow: hidden;
}

.hero__inner {
  position: relative;
  z-index: 2;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  padding: var(--sp-2) var(--sp-5);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-accent-light);
  margin-bottom: var(--sp-8);
}

.hero__title {
  font-family: var(--ff-heading);
  font-size: clamp(var(--fs-3xl), 6vw, var(--fs-4xl));
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: var(--sp-6);
}

.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  max-width: 580px;
  margin-inline: auto;
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  margin-bottom: var(--sp-10);
  line-height: 1.8;
}

.hero__subtitle strong {
  color: var(--clr-text);
  font-weight: 600;
}

/* Grid overlay */
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(124,92,252,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,92,252,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 100%);
}


/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--ff-body);
  font-weight: 600;
  font-size: var(--fs-base);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-6);
  transition: all var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 60px var(--clr-accent-glow);
}

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

.btn--lg {
  padding: var(--sp-4) var(--sp-8);
  font-size: var(--fs-md);
  border-radius: var(--radius-lg);
}

.btn--full {
  width: 100%;
  padding: var(--sp-4) var(--sp-6);
  font-size: var(--fs-md);
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: .6;
  cursor: not-allowed;
  transform: none !important;
}

.btn__loading { display: inline-flex; align-items: center; gap: var(--sp-2); }
.btn__text[hidden],
.btn__loading[hidden] { display: none; }

.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}

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


/* --- Steps Section --- */
.steps {
  padding: var(--sp-20) 0;
  position: relative;
  z-index: 2;
}

.section-title {
  font-family: var(--ff-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  text-align: center;
  letter-spacing: -.02em;
  margin-bottom: var(--sp-12);
}

.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.step-card {
  position: relative;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  transition: border-color var(--duration) var(--ease-out),
              transform var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
}

.step-card:hover {
  border-color: var(--clr-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.step-card__number {
  font-family: var(--ff-heading);
  font-size: var(--fs-4xl);
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: .15;
  position: absolute;
  top: var(--sp-4);
  right: var(--sp-6);
  line-height: 1;
}

.step-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  background: rgba(124, 92, 252, .1);
  border-radius: var(--radius-md);
  margin-bottom: var(--sp-5);
  color: var(--clr-accent-light);
}

.step-card__icon svg { width: 24px; height: 24px; }

.step-card__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--sp-2);
}

.step-card__text {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: 1.7;
}


/* --- Form Section --- */
.form-section {
  padding: var(--sp-16) 0 var(--sp-24);
  position: relative;
  z-index: 2;
}

.form-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}


/* Sidebar */
.form-sidebar {
  background: var(--gradient-brand);
  padding: var(--sp-12);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.form-sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(255,255,255,.12) 0%, transparent 60%),
    radial-gradient(circle at 80% 20%, rgba(0,0,0,.15) 0%, transparent 50%);
}

.form-sidebar__content {
  position: relative;
  z-index: 1;
}

.form-sidebar__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin-bottom: var(--sp-4);
}

.form-sidebar__title .gradient-text {
  -webkit-text-fill-color: #fff;
  text-decoration: underline;
  text-decoration-color: rgba(255,255,255,.4);
  text-underline-offset: 4px;
}

.form-sidebar__text {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,.85);
  line-height: 1.8;
  margin-bottom: var(--sp-8);
}

.form-sidebar__features {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.sidebar-feature {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: rgba(255,255,255,.9);
}

.sidebar-feature .icon-sm {
  width: 18px; height: 18px;
  flex-shrink: 0;
}


/* Form Panel */
.form-panel {
  padding: var(--sp-10);
}


/* Form Message */
.form-message {
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: var(--sp-6);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  animation: slideDown .35s var(--ease-out);
}

.form-message[hidden] { display: none; }

.form-message--success {
  background: var(--clr-success-bg);
  border: 1px solid rgba(52, 211, 153, .25);
  color: var(--clr-success);
}

.form-message--error {
  background: var(--clr-error-bg);
  border: 1px solid rgba(248, 113, 113, .25);
  color: var(--clr-error);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}


/* Form fields */
.form__header {
  margin-bottom: var(--sp-8);
}

.form__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-xl);
  font-weight: 700;
  margin-bottom: var(--sp-1);
}

.form__desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
}

.required-mark {
  color: var(--clr-accent-light);
  font-weight: 600;
}

.field {
  margin-bottom: var(--sp-5);
}

.field__label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-text);
  margin-bottom: var(--sp-2);
}

.field__hint {
  font-size: var(--fs-xs);
  color: var(--clr-text-dim);
  margin-bottom: var(--sp-2);
  line-height: 1.5;
}

.field__input {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-size: var(--fs-base);
  line-height: 1.6;
  transition: border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.field__input::placeholder {
  color: var(--clr-text-dim);
}

.field__input:focus {
  outline: none;
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px var(--clr-accent-glow);
  background: var(--clr-surface-3);
}

.field__input--textarea {
  min-height: 100px;
}

/* Validation states */
.field--error .field__input {
  border-color: var(--clr-error);
  box-shadow: 0 0 0 3px var(--clr-error-bg);
}

.field__error {
  display: block;
  font-size: var(--fs-xs);
  color: var(--clr-error);
  margin-top: var(--sp-1);
  min-height: 1.2em;
  transition: opacity var(--duration);
}


/* --- Icons --- */
.icon-xs { width: 16px; height: 16px; flex-shrink: 0; }
.icon-sm { width: 20px; height: 20px; flex-shrink: 0; }


/* --- Footer --- */
.footer {
  padding: var(--sp-8) 0;
  border-top: 1px solid var(--clr-border);
  position: relative;
  z-index: 2;
}

.footer__inner {
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
}


/* --- Animations (Intersection Observer) --- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .steps__grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin-inline: auto;
  }

  .form-wrapper {
    grid-template-columns: 1fr;
  }

  .form-sidebar {
    padding: var(--sp-8);
  }

  .form-sidebar__title {
    font-size: var(--fs-xl);
  }

  .form-panel {
    padding: var(--sp-6);
  }
}

@media (max-width: 600px) {
  .hero__title {
    font-size: var(--fs-2xl);
  }

  .hero__badge {
    font-size: var(--fs-xs);
  }

  .header__link:not(.header__link--cta) {
    display: none;
  }

  .section-title {
    font-size: var(--fs-xl);
  }

  .form-sidebar__features {
    gap: var(--sp-3);
  }

  .btn--lg {
    padding: var(--sp-3) var(--sp-6);
    font-size: var(--fs-base);
  }
}