/* ============================================================
   Ram Pandhare | Portfolio — style.css
   Structure:
   1. CSS Variables (Design Tokens)
   2. Reset & Base
   3. Typography
   4. Layout Utilities
   5. Header & Nav
   6. Glass Card & Tech Grid
   7. Buttons
   8. Footer
   9. Animations
   10. Responsive / Media Queries
   ============================================================ */


/* ============================================================
   1. CSS VARIABLES
   ============================================================ */

:root {
  /* Brand Colors */
  --clr-primary:        #e8621a;
  --clr-primary-dark:   #cf5515;
  --clr-primary-light:  rgba(232, 98, 26, 0.10);
  --clr-primary-border: rgba(232, 98, 26, 0.20);
  --clr-primary-glow:   rgba(232, 98, 26, 0.10);

  /* Background */
  --clr-bg:             #fff8f2;
  --clr-bg-gradient:    radial-gradient(ellipse at top left, #ffe5cc 0%, #fff8f2 60%, #fff3ea 100%);

  /* Text */
  --clr-text-heading:   #111111;
  --clr-text-body:      #444444;
  --clr-text-muted:     #888888;
  --clr-text-tag:       #c04f10;

  /* Glass Card */
  --clr-glass-bg:       rgba(255, 255, 255, 0.55);
  --clr-glass-border:   rgba(255, 160, 80, 0.25);

  /* Header */
  --clr-header-bg:      rgba(255, 248, 242, 0.75);
  --clr-header-border:  rgba(255, 160, 80, 0.15);

  /* Dividers */
  --clr-divider:        rgba(255, 160, 80, 0.15);

  /* Typography */
  --font-main:          'Inter', sans-serif;

  /* Font Sizes */
  --fs-xs:    0.75rem;
  --fs-sm:    0.85rem;
  --fs-base:  1rem;
  --fs-md:    1.05rem;
  --fs-lg:    1.2rem;
  --fs-xl:    1.6rem;
  --fs-2xl:   2.2rem;
  --fs-3xl:   3.2rem;

  /* Font Weights */
  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  /* Spacing Scale */
  --sp-1:   4px;
  --sp-2:   8px;
  --sp-3:   12px;
  --sp-4:   16px;
  --sp-5:   20px;
  --sp-6:   24px;
  --sp-8:   32px;
  --sp-9:   36px;
  --sp-10:  40px;
  --sp-12:  48px;
  --sp-15:  60px;
  --sp-20:  80px;
  --sp-25:  100px;

  /* Border Radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   20px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-card: 0 8px 40px rgba(232, 98, 26, 0.10);
  --shadow-btn:  0 4px 16px rgba(232, 98, 26, 0.25);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Layout */
  --max-width:     1200px;
  --header-height: 72px;
}


/* ============================================================
   2. RESET & BASE
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  color: var(--clr-text-body);
  background-color: var(--clr-bg);
  background-image: var(--clr-bg-gradient);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
video {
  max-width: 100%;
  display: block;
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}


/* ============================================================
   3. TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  color: var(--clr-text-heading);
  line-height: 1.15;
  letter-spacing: -0.5px;
}

h1 { font-size: var(--fs-3xl); font-weight: var(--fw-bold);     letter-spacing: -1.5px; }
h2 { font-size: var(--fs-xl);  font-weight: var(--fw-semibold); }
h3 { font-size: var(--fs-lg);  font-weight: var(--fw-semibold); }

p {
  color: var(--clr-text-body);
  line-height: 1.7;
}

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


/* ============================================================
   4. LAYOUT UTILITIES
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-15);
}

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { display: flex; flex-direction: column; }
.gap-2        { gap: var(--sp-2); }
.gap-4        { gap: var(--sp-4); }
.gap-6        { gap: var(--sp-6); }

.section {
  padding-block: var(--sp-25);
}


/* ============================================================
   5. HEADER & NAV
   ============================================================ */

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--sp-15);
  height: var(--header-height);
  background: var(--clr-header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-header-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: 0 4px 24px rgba(232, 98, 26, 0.08);
}

/* Logo */
.logo {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--clr-primary);
  letter-spacing: -1px;
  opacity: 1 !important;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.8 !important;
}

/* Nav Links */
nav {
  display: flex;
  gap: var(--sp-9);
  align-items: center;
}

nav a {
  font-size: 0.95rem;
  font-weight: var(--fw-medium);
  color: var(--clr-text-body);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition-fast);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-primary);
  border-radius: var(--radius-pill);
  transition: width var(--transition-base);
}

nav a:hover,
nav a.active {
  color: var(--clr-primary);
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}


/* ============================================================
   6. GLASS CARD
   ============================================================ */

.glass-card {
  background: var(--clr-glass-bg);
  border: 1px solid var(--clr-glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-xl);
  padding: var(--sp-9);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(232, 98, 26, 0.15);
}


/* ============================================================
   7. BUTTONS
   ============================================================ */

.btn,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 13px var(--sp-8);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: var(--fw-semibold);
  font-family: var(--font-main);
  cursor: pointer;
  transition: background var(--transition-base),
              color var(--transition-base),
              transform var(--transition-fast),
              box-shadow var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
}

/* Filled */
.btn {
  background: var(--clr-primary);
  color: #ffffff;
  border: 2px solid var(--clr-primary);
}

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

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--clr-primary);
  border: 2px solid var(--clr-primary);
}

.btn-outline:hover {
  background: var(--clr-primary-light);
  transform: translateY(-2px);
}

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

/* Sizes */
.btn-sm { padding: 8px var(--sp-5);  font-size: var(--fs-sm); }
.btn-lg { padding: 16px var(--sp-10); font-size: var(--fs-md); }


/* ============================================================
   8. TAG PILL
   ============================================================ */

.tag {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 2px;
  color: var(--clr-primary);
  background: var(--clr-primary-light);
  border: 1px solid var(--clr-primary-border);
  padding: 6px var(--sp-4);
  border-radius: var(--radius-pill);
  margin-bottom: var(--sp-6);
  text-transform: uppercase;
}


/* ============================================================
   9. FOOTER
   ============================================================ */

footer {
  text-align: center;
  padding: var(--sp-8) var(--sp-15);
  color: var(--clr-text-muted);
  font-size: var(--fs-sm);
  border-top: 1px solid var(--clr-divider);
  background: rgba(255, 248, 242, 0.6);
}

footer p   { color: var(--clr-text-muted); }
footer a   { color: var(--clr-primary); font-weight: var(--fw-medium); }
footer a:hover { opacity: 0.75; }


/* ============================================================
   10. FORM SHARED STYLES
   ============================================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: #444;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--clr-primary-border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.6);
  font-family: var(--font-main);
  font-size: 0.92rem;
  color: #111;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #bbb;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(232, 98, 26, 0.10);
  background: #fff;
}

.required { color: var(--clr-primary); font-size: 0.85rem; }
.optional  { color: #aaa; font-size: 0.75rem; font-weight: 400; }

.form-success {
  font-size: 0.88rem;
  font-weight: 500;
  color: #2e7d32;
  background: #f0faf0;
  border: 1px solid #c8e6c9;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-top: 12px;
}

.form-error {
  font-size: 0.88rem;
  font-weight: 500;
  color: #c62828;
  background: #fff5f5;
  border: 1px solid #ffcdd2;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-top: 12px;
}


/* ============================================================
   11. ANIMATIONS
   ============================================================ */

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.anim-fade-up { animation: fadeSlideUp 0.7s ease both; }
.anim-fade-in { animation: fadeIn 0.5s ease both; }
.anim-delay-1 { animation-delay: 0.1s; }
.anim-delay-2 { animation-delay: 0.2s; }
.anim-delay-3 { animation-delay: 0.3s; }
.anim-delay-4 { animation-delay: 0.4s; }


/* ============================================================
   12. RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  :root { --fs-3xl: 2.6rem; }
}

@media (max-width: 768px) {
  :root { --fs-3xl: 2.2rem; }

  .header { padding-inline: var(--sp-6); }

  nav { gap: var(--sp-5); }
  nav a { font-size: var(--fs-sm); }
}

@media (max-width: 480px) {
  :root { --fs-3xl: 1.9rem; }

  nav { gap: var(--sp-3); }
  nav a { font-size: 0.78rem; }

  footer { padding-inline: var(--sp-5); }
}